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UNITED STATES DEPARTMENT OF COMMERCE

Maurice H. Stans, Secretary

\J , 5 , NATIONAL BUREAU OF STANDARDS A. V. Astin, Director

% o t

Ionization Potentials, Appearance Potentials, and Heats of Formation of Gaseous

Positive Ions

J. L. Franklin and J. G. Dillard

Rice University, Houston, Texas 77001

H. M. Rosenstock, J. T. Herron, and K. Draxl

Institute for Materials Research

National Bureau of Standards

Washington, D.C. 20234

and

F. H. Field

Esso Research and Engineering Company

Linden, New Jersey 07036

NSRDS

NSRDS-NBS 26

i Nat. Stand. Ref. Data Ser., Nat. Bur. Stand. (U.S.), 26, 289 pages (June 1969)

CODEN: NSRDA

Issued June 1969

For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402-Price $4
NATIONAL BUREAU OF STANDARDS

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Library of Congress Catalog Card Number: 68-62689
Foreword

The National Standard Reference Data System is a Government-wide effort to provide for

the technical community of the United States effective access to the quantitative data of physical

science, critically evaluated and compiled for convenience, and readily accessible through a

variety of distribution channels. The System was established in 1963 by action of the President’s

Office of Science and Technology and the Federal Council for Science and Technology.

The responsibility to administer the System was assigned to the National Bureau of Standards

and an Office of Standard Reference Data was set up at the Bureau for this purpose. Since 1963,

this Office has developed systematic plans for meeting high-priority needs for reliable reference

data. It has undertaken to coordinate and integrate existing data evaluation and compilation

activities (primarily those under sponsorship of Federal agencies) into a comprehensive program,

supplementing and expanding technical coverage when necessary, establishing and maintaining

standards for the output of the participating groups, and providing mechanisms for the dissemination of the output as required.

The System now comprises a complex of data centers and other activities, carried on in Government agencies, academic institutions, and nongovernmental laboratories. The independent

operational status of existing critical data projects is maintained and encouraged. Data centers

that are components of the NSRDS produce compilations of critically evaluated data, critical

reviews of the state of quantitative knowledge in specialized areas, and computations of useful

functions derived from standard reference data. In addition, the centers and projects establish

criteria for evaluation and compilation of data and make recommendations on needed modifications

or extensions of experimental techniques.

Data publications of the NSRDS take a variety of physical forms, including books, pamphlets,

loose-leaf sheets and computer tapes. While most of the compilations have been issued by the

Government Printing Office, several have appeared in scientific journals. Under some circumstances, private publishing houses are regarded as appropriate primary dissemination mechanisms.

The technical scope of the NSRDS is indicated by the principal categories of data compilation projects now active or being planned: nuclear properties, atomic and molecular properties,

solid state properties, thermodynamic and transport properties, chemical kinetics, colloid and

surface properties, and mechanical properties.

An important aspect of the NSRDS is the advice and planning assistance which the National

Research Council of the National Academy of Sciences-National Academy of Engineering provides.

These services are organized under an overall Review Committee which considers the program

as a whole and makes recommendations on policy, long-term planning, and international collaboration. Advisory Panels, each concerned with a single technical area, meet regularly to examine

major portions of the program, assign relative priorities, and identify specific key problems in

need of further attention. For selected specific topics, the Advisory Panels sponsor subpanels

which make detailed studies of users’ needs, the present state of knowledge, and existing data resources as a basis for recommending one or more data compilation activities. This assembly

of advisory services contributes greatly to the guidance of NSRDS activities.

The NSRDS—NBS series of publications is intended primarily to include evaluated reference

data and critical reviews of long-term interest to the scientific and technical community.

A. V. Astin, Director.

hi
Contents

Page Foreword iii

1. Introduction 1

1.1. General 1 1.2. Literature coverage 1

1.3. Order of presentation 2

1.4. Reliability of data and criteria for evaluation 2

1.5. Thermochemical considerations 3

1.6. Selection of “best” values 4

1.7. Units 4

1.8. Concluding remarks 4

1.9. References 4

2. Order of ion presentation 5

3. Table 1. Ionization potentials, appearance potentials and heats of formation of gaseous

positive ions 14

4. Table 2. Heats of formation of gaseous neutral species derived from the data of

table 1 238

5. Bibliography for tables 1 and 2 245

6. Author index for tables 1 and 2 256

7. Appendix 1. Heats of formation used in tables 1 and 2 260

8. Bibliography for appendix 1 282

9. Appendix 2. Table of group equivalent values 285

IV
Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions

J. L. Franklin and J. G. Dillard

Rice University, Houston, Texas 77001

H. M. Rosenstock, J. T. Herron, and K. Draxl

Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234

and

F. H. Field

Esso Research and Engineering Company, Linden, New Jersey 07036

This is a compilation of ionization and appearance potentials of positive ions published from 1955 through June 1966. The compilation lists the ion formed, the parent species from which it was formed,

the other products of the process, the threshold energy for the formation of this ion, and the method

by which this data was obtained. Where feasible, the heat of formation at 298 K of the positive ion has been computed for each

entry using auxiliary thermochemical data. From these computed values “best” values have been

chosen.

Key Words: Appearance potential; compilation; data; heat of formation; ionization potential;

ions; positive ions.

1. Introduction

1.1. General

Since the publication of “Electron Impact

Phenomena and the Properties of Gaseous Ions”

by F. H. Field and J. L. Franklin [l], 1 which contained a compilation of ionization and appearance

potentials reported through 1955, the study of

gaseous ionization phenomena has undergone an

explosive growth in the number and variety of

pertinent research studies. This field now includes

aspects of vacuum ultraviolet spectroscopy, inelastic electron scattering, photoionization, photoelectron spectroscopy, mass spectrometry, charge

exchange, and theoretical chemistry.

The present volume is intended to cover the

literature published since 1955. It is our hope

that it will serve several purposes. First, it will

present essentially all of the values of appearance

potentials of positive ions obtained since 1955;

second it will provide a set of “best” values of

heats of formation of gaseous ions; third, it will serve as a guide to the literature.

1 Figures in brackets indicate the literature references on page 4.

As there is considerable variation in the quality

of the data in this field it would have been simpler

to include only the well-determined numbers.

However, in some cases the only values available were obtained by imprecise methods, and in the

belief that an approximate value is better than none we decided to include all available data in the

compilation.

1.2. Literature Coverage

Literature references were obtained initially

from unpublished annual bibliographies compiled

by volunteers for ASTM Committee E—14 on Mass

Spectrometry, the compilations of Kiser [2], bibliographies published in “Advances in Mass

Spectrometry” [3], references given in various

review articles, and since 1964, by scanning

“Current Content, Physical Sciences” and “Physics

Abstracts.” The cutoff data was June 30, 1966.

We feel that coverage is reasonably thorough for

experimental papers but rather spotty for theoretical

and semiempirical treatments.

1
1.3. Order of Presentation Table A. Experimental techniques

The heart of this work is table 1, which gives

ionization potentials, appearance potentials, probable mechanisms, the method by which the data

was obtained, and computed heats of formation of

the various positive ions. The order of presentation

of the ions is that of increasing atomic number

(except for the rare gases, which are given to- gether) and molecular complexity. Section 2,

“Order of Presentation,” lists the ions and the

order and page of their appearance.

For each ion, the various processes of ion for- mation are arranged in order of increasing complexity, and for each order of complexity, in order

of decreasing reliability of method. Thus direct

ionization processes are given before fragmentation

processes and spectroscopic measurements before

electron impact measurements. The mechanisms

listed are usually, but not necessarily, those given

in the original paper. Where more than one neutral

product is proposed, we have usually considered

the mechanism to be too speculative to warrant

using the resulting heat of formation in arriving at a “best” value. Appearance potentials are given

along with the investigator’s estimate of the precision of their measurements. These are usually

average deviations from the average appearance

potential and in no sense limits of accuracy of the

measurement.

The method of measurement is indicated in an

abbreviated form along with each appearance potential. Table A lists the abbreviations, their meaning, and at least one reference in which the method

is discussed in some detail. Theoretical calculations are included for completeness. The table also

includes an estimate of the reliability of the methods,

which is discussed later. For most measurements for which a reasonably unambiguous mechanism could be devised by

either the investigator or, in a few instances, ourselves, a heat of formation of the product ion has

been computed and listed in table 1. This calculation will be discussed below. In some instances

where the heat of formation of the ion is well established but that of the neutral species, either reactant or product, is not, we have computed the heat

of formation of the neutral. The heats of formation

of the neutrals thus determined are collected for

convenience in table 2. Finally, for each appearance potential given

in table 1, a numerical reference to the bibliography

of appearance potentials is listed. This bibliography

follows table 2. The numbers were assigned in the

order in which the papers were read and, to simplify the problem of seeking results by a particular

author, an author index is included.

Abbreviation Method Reference

Estimated pre- cision in meas- urement of—

IP(eV) AP(eV)

S Optical spectroscopy 27 ±0.01

PI Photoionization 19, 20-24 ±0.01 ±0.05

EM Electron monochromator 9, 10 ±0.05 ±0.05

RPD Retarding potential

difference. 25,26 ±0.05 ±0.1

PE Photoelectron spec- troscopy.

16,17,18 ±0.1 —

SI Surface ionization 29 ±0.1

CS Critical slope 4 ±0.2 ±0.3

SL Semi-log plot 8,28 ±0.2 ±0.3

EVD Extrapolated voltage

difference.

1,8, 11 ±0.2 ±0.3

FDP First differential plot 12 ±0.2 ±0.3

MSD Morrison 2nd differential

plot. 12 ±0.2 ±0.3

VC Vanishing current or

initial break. 1,8 ±0.2 ±0.3

VDF Voltage difference at fixed percent of ion current at standard

intensity.

7,28 ±0.3 ±0.4

EC Energy compensation 7,8 ±0.3 ±0.5

LE Linear extrapolation 1,8 ±0.4 ±0.5

NRE N'th root extrapolation 13, 14, 15 ?

9 CTS Charge transfer spectra 5,6 ? TC Theoretical calculation 8

9 —

NS Unspecified electron impact method. - - —

D Derived — — -

1.4. Reliability of Data and Criteria

for Evaluation

As noted above, the basic information is of

quite variable quality. The responsibility for this rests partly with the molecules and partly with the

experiments and their interpretation. A detailed

discussion of these factors will not be given here;

some pertinent review articles are cited in refer- ences [1, 30, 31], The following general remarks are

offered. Above the ionization threshold there exists a wide variety of cross-section behavior both for

atoms and molecules. In the former case an important factor is autoionization from Rydberg levels

leading to electronically excited states of the ions.

For molecules, in addition, there may be differences

between the equilibrium configuration of the molecule and the molecule ion. Because of the FranckCondon principle this produces additional vibrational structure in the cross-section curve. Thus, in

some cases doubt arises as to whether the ionization

2
onset corresponds to an ion without vibrational

excitation.

Turning to the experimental techniques, the

identification of a molecular Rydberg series, to- gether with investigation of vibrational structure

by isotopic substitution almost always leads to a very good value for ionization potentials. Although

such data have been obtained for ammonia and

ethylene, for example, no corresponding structure

has yet been found in the absorption spectrum of

many other molecules including oxygen and

methane. In photoionization, molecule ions formed

with only small equilibrium geometry changes

produce sharp photoionization thresholds; whereas

molecules having featureless absorption spectra

yield gradually rising photoionization curves which

are difficult to interpret.

The various electron impact techniques are somewhat poorer because some suffer from lack

of an absolute energy scale and some from a wide

energy spread in the electron beam, or both.

Furthermore a sharp onset at the ionization threshold is not predicted by theory or experimentally

observed. Thus, the majority of the methods

employing electron impact use a calibrating gas

(usually argon) to fix the energy scale with the

hope that the cross-section behavior of argon and

the molecule under study are not too dissimilar.

Examination of the tables will show that for ionization potentials the results in the best cases are frequently, but not always, within a few tenths of

a volt or better of the spectroscopic onset. Because of the widespread occurrence of

autoionization, the determination of higher ionization potentials is far more difficult. Reliable in- formation has been obtained essentially only from

those vacuum ultraviolet absorption spectra which

have yielded identifiable higher Rydberg spectra

and from the recently developed technique of

photoelectron spectroscopy, which eliminates

interference from autoionization. Higher ionization

potentials are very difficult to identify in photoionization curves or from electron impact studies.

The determinations of energy thresholds for

fragmentation processes suffer the same difficulties as determinations of ionization thresholds. In

addition, some fragmentation processes involve

production of fragment ions with kinetic energy or

electronic excitation. In only a few cases have such

phenomena been clearly identified and studied.

However, in large molecules experience suggests

that these factors may not be very significant and

that reasonable thermochemical quantities may be

derived from the threshold data. On the basis of

existing data it is to be expected that in many, but

by no means all cases, fragmentation threshold

energies obtained by photoionization will be up

to 0.5 eV lower than those determined by electron

impact. Unfortunately relatively few appearance

potentials of fragment ions have been obtained by

photoionization methods so that we must rely to a large extent upon electron impact determinations.

These considerations have led us to the evaluation of the reliability of the various methods

given in table A. This ordering has been a significant basis of the choosing of “best” values. The

placement of theoretical calculations was difficult

and perhaps incorrect, but reflects our feeling

that, at present, theoretical calculations have only

moderate predictive value.

It should be emphasized that this table is intended as a general guide to the current re- liability of these methods. Some measurements

will be better and others worse than indicated in

this table.

1.5. Thermochemical Considerations

The heats of formation of ions presented here

do not represent equilibrium thermochemical

properties. They are the results of measurements

on isolated molecules, and were arrived at by employing known heats of formation of neutral species

in conventional thermochemical equations employing the measured appearance potential as the heat

of reaction. Evidently this treatment is not rigorous.

Unfortunately at this time it would be impractical

and usually impossible to derive rigorously correct

equilibrium values from available information and

in many instances the quality of the data does not

justify such treatment. Furthermore, the temperature at which the measurements were made is not

usually known. Thus although spectroscopic meas- urements refer to processes at 0 K, photon impact

measurements are normally carried out at about

300 K, and electron impact measurements at temperatures considerably greater than 300 K.

Fortunately the temperature effect is not

large, and accordingly we have treated all the re- ported ionization and appearance potentials as heats of reaction at 298 K. The heat of formation

of the electron has been taken to be zero at all temperatures.

In computing heats of formation from appear- ance potentials it is of course necessary to know

the heats of formation of the appropriate neutral

species. When possible we have taken these from

standard compilations, notably Technical Note

270-3 [32] and Circular 500 [33] of the National

Bureau of Standards, The JANAF Tables [34] and

the API Tables of Thermodynamic Properties of

Hydrocarbons [35]. Otherwise, the data was taken

from research papers. Unfortunately, values were

not always available and in a number of cases we

have resorted to the method of Franklin [36] for

estimating heats of formation.

3
1.6. Selection of “Best” Values

Wherever possible we have given our conclusion as to the most reliable heat of formation of an ion. In choosing the heats of formation to be

assigned to the various ions we were forced to rely

heavily upon internal consistency of the measure- ments on a given ion and on subjective criteria. In general, values derived from spectroscopic

or photon impact measurements have been given

greatest weight, as were values based on direct

rather than dissociative ionization processes.

The values of the heats of formation used in

arriving at a “best” value are labeled with an

asterisk. In those cases where a large number of

measurements were involved or where there was

any degree of ambiguity, the heats of formation

are given beside the formula for the ion in a separate heading preceding each set of data.

1.7.

Units

The conversion factors used here are

1 eV = 96487.OJ = 23060.9 cal.

1.8.

Concluding Remarks

The authors recognize all too well that in a work

of this scope there will be errors of omission and

commission and that some choices of “best” values were more subjective than self-evident. We solicit

comments, criticism, differences of opinion and

additional factual information.

We thank Georgia L. Apostolou, Emma Lou

Bageant, Wilma Bell, Robert Cobb, Deborah Ann

Copes and William A. Seitz for their assistance in

the preparation of this compilation. Our special

thanks go to Frederic N. Harllee, who contributed

much energy and imagination to the initial phases

of this project, to Dr. D. Garvin and J. Hilsenrath

for numerous helpful suggestions and to Dr. S. Rossmassler and Dr. E. L. Brady for support and

encouragement.

1.9.

References

[11 Field, F. H., and Franklin, J. L., Electron Impact Phenomena and the Properties of Gaseous Ions (Academic Press, New York, 1957).

[2] Kiser, R. W., Tables of Ionization Potentials, U.S. Atomic

Energy Commission, Office of Technical Information,

Report No. TID-6142, June 20, 1960, and Supplement, June 20, 1962.

[3] For the most recent see Advances in Mass Spectrometry,

Vol. 3, The Institute of Petroleum, London, 1966.

[4] Wahrhaftig, A. L., The theory of mass spectra and the inter- pretation of ionization efficiency curves, in Application of Mass Spectrometry to Organic Chemistry, R. I. Reed, Ed. (Academic Press, New York, 1966).

[5] Mulliken, R. S., J. Am. Chem. Soc. 74 , 811 (1952).

[6] Collin, J., Z. Electrochem. 64, 936 (1960).

[7] Kiser, R. W., and Gallegos, E. J., J. Phys. Chem. 66, 947

(1962).

[8] Kiser, R. W., Introduction to Mass Spectrometry and Its Applications (Prentice-Hall, Inc., Englewood Cliffs, N.J.,

1965)

. [9] Marmet, P., and Kerwin, L., Can. J. Phys. 38, 787 (1960).

[10] Brion, C. E., Frost, D. C., and McDowell, C. A., J. Chem.

Phys. 44, 1034 (1966).

[11] Warren, J. W., Nature 165, 810 (1950).

[12] Morrison, J. D., J. Chem. Phys. 21, 1767 (1953).

[13] Morrison, J. D., and Nicholson, A. J. C., J. Chem. Phys. 31,

1320(1959).

[14] Dorman, F. H., Morrison, J. D., and Nicholson, A. J. C.,

J. Chem. Phys. 31, 1335 (1959).

[15] Dorman, F. H., and Morrison, J. D., J. Chem. Phys. 35, 575

(1961).

[16] Al-Joboury, M. I., and Turner, D. W., J. Chem. Phys. 37,

3007 (1962).

[17] Al-Joboury, M. I., and Turner, D. W., J. Chem. Soc. 5141

(1963).

[18] Al-Joboury, M. I., and Turner, D. W., J. Chem. Soc. 4434

(1964).

[19] Hurzeler, H., Inghram, M. G., and Morrison, J. D., J. Chem.

Phys. 28, 76 (1958).

[20] Watanabe, K., J. Chem. Phys. 22, 1564 (1954).

[21] Watanabe, K., Nakayama, T., and Mottl, J., J. Quant.

Spectrosc. Radiat. Transfer 2, 369 (1962).

[22] Lossing, F. P., and Tanaka, I., J. Chem. Phys. 25, 1031

(1956).

[23] Weissler, G. L., Sampson, J. A. R., Ogawa, M., and Cook,

G. R„ J. Opt. Soc. Am. 49, 338 (1959).

[241 Dibeler, V. H., and Reese, R. M., J. Res. NBS A68 (Phys.

and Chem.) No. 4, 409 (1964).

[25] Fox, R. E., Hickam, W. M., Grove, D. J., and Kjeldaas, T., Rev. Sci. Instr. 26, 1101 (1955).

[26] Fox, R. E., Hickam, W. M., and Kjeldaas, T., Phys. Rev. 89,

555 (1953).

[27] Herzberg, G., Molecular Spectra and Molecular Structure,

Vol. Ill (D. Van Nostrand Co., Inc., Princeton, N.J.,

1966)

. [28] Lossing, F. P., Tickner, A. W., and Bryce, W. A., J. Chem.

Phys. 19, 1254 (1951).

[29] Bakulina, I. N., and Ionov, N. I., Zh. Eksperim. i Teor. Fiz. 36, 1001 (1959).

[30 1 Krauss, M., and Dibeler, V. H., Appearance potential data

of organic molecules, in Mass Spectrometry of Organic

Ions, F. W. McLafferty, Ed. (Academic Press, New York,

1963).

[31] McDowell, C. A., The ionization and dissociation of molecules, ch. XII of Mass Spectrometry, C. A. McDowell,

Ed. (McGraw-Hill Book Co., Inc., New York, 1963).

[32] Wagman, D. D., Evans, W. H., Parker, V, B., Halow, I., Bailey, S. M., and Schumm, R. H.. National Bureau of Standards Technical Note 270-3, U.S. Government

Printing Office, Washington, D.C. 20402 (1968).

[33] Rossini, F. D., Wagman, D. D., Evans, W. H., Levine, S., and Jaffe, I., National Bureau of Standards Circular 500, U.S. Government Printing Office, Washington, D.C. 20402

(1952).

[34] JANAF Thermochemical Tables, The Dow Chemical Company, Midland, Michigan.

[35] Rossini, F. D., Pitzer, K. S., Arnett, R. L., Braun, R. M., and

Pimentel, G. C., Selected Values of Physical and Thermodynamic Properties of Hydrocarbons and Related Compounds (Carnegie Press, Pittsburgh, 1953).

[36] Franklin, J. L., Ind. Eng. Chem. 41, 1070 (1949).

4
2. Order of Ion Presentation

The ions in table 1 are arranged in this order: hydrogen first, the rare gases, and then the remaining

elements in order of increasing atomic number. Molecules containing two or more elements are found under

the element of highest atomic number, except for the rare gas halides, which are listed under the halogens.

TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Page Page Page

H Xe b2 dj 21 B«H+

b2 h5+ 21 B«H+

H+ 14 Xe+ 17 b2 hd+ 21 B6 H7+ D+ 14 Xe+2 18 b2 d5+ 21 b6 h+

h2+ 14 Xe+3 18 b2 h+ 21 b6 h+

HD+ 14 Xe+4 18 b2 d+ 21 B«H+0 d2+ 14 Xe+5 18 b3 h+ 21 B«D+0 Xe+6 18 B3 H+ 22 BioHt

He

Xe+7

Xe+8

Xe+9

19

19

19

B3 H+

B3D+

B3H+

22

22

22

tu 5 BioHf

B10HJ

BioHf0 He+ 15

Li

B3 Dt 22 BioHt,

b4 h+ 22 BioHja

Ne

Li+ 19

B4H+

B4H+

22

22

BioH^4 BioHf6 LiH+ 19 B4D+ 22

Ne+ 15 b4 h4+ 22

Ne+2 15 Be b4 d+ 22 c

Ne+3 15 b4 h5+ 22

Ne+4 15 b4 d+ 23

c+

c+

Ne+5 15 Be+ 19 B4H+

B4D+

23

23

Ar B B4H+ 23

r+ ^3

c+ b4 d+ 23

B+

B4H+ 23

C5+ Ar+ 15 19 B4D+ 23 Cf

Ar+2 16 bt 20 B4H+ 23

CH+

Ar+ 3 16 BH+ 20 B4 D+ 23 CHt

Ar+ 4 Ar+ 5 16

16

BD+

bh2+ 20

20 b5 h+

B-H+

23

23

cd2+ ch3+ Ar+ 6

Kr

16 BD^

BH+

BDj

B2 H+

b2 d+

20

20

20

20

20

-LFo 1 a

5 b5 d+

B5H+

B-.D+ b5 h+

23

24

24

24

CDJ

ch4+ CDj

C2 H+

c2 d+

Kr+ 16 b2 h2+ 20 b5 d+ 24 C2 Ht

Kr+2 17 b2 hd+ 20 b5 h+ 24

c2 dj

Kr+3 17 b2 d+ 20 B5D+ 24 c2 h3+ Kr+ 4 17 b2 h+ 21 b5 h+ 24

c2 h2 d+

Kr+5 17 b2 hd2+ 21 b5 d+ 24 c2 hdj

Kr+6 17 b2 d3+ 21 B5H+ 24 C2 Dj

Kr+7 17 B2 Ht 21 B.>D+0 25 c2 h4+ Kr+8 17 B2 HDj 21 B,;H| 25 c2 h±

Page

25

25

25

25

25

25

25

25

25

25

25

25

26

26

26

26

26

27

27

27

27

27

28

29

29

33

33

33

33

34

34

35

36

37

37

37

37

38

5
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Page

c2 h6+ 40

c3 h+ 41

c3h2+ 41

c3 h;| 41

c3 hd+ 42

C3 Dj 42

c3 h1 43

c3hd+ 43

C3H+ 43

c3 h6+ 44

C3Ui 45

c3 h8+ 47

c4 h+ 47

c4h2+ 47

c4h3+ 48

c4 h4+ 48

c4h5+ 49

C4 H6+ 49

C4 Hf 49

c4 H8+ 50

c4 h9+ 51

C4 Hf0 52

c5 h3+ 52

c5H5+ 53

C5 Hbt 53

C5 H5 D+ 53

c5 h+ 53

c5 h+ 54

c5 h9+ 54

c5 h+ 55

C5 H+ 56

C5 H+ 57

c6 h+ 57

CeH.| 57

c6 h3+ 58

ChH4+ 58

c6 h.+ 58

C6 Hbt 60

c6 h5 d- 62

c6 h.5 d+ 2 62

ChH5 D+3 62

CeDbt 62

ChH+ 63

c«h8+ 63

ChH+ 63

C«H+ 63

C6 H+ 64

C6 H+

2 64

ChH- 65

C(i H+

4 65

c7 h+ 66

Page

c7 h+ 66

c7 h5 d+ 67

c7 h8+ 68

C7 H+ 2 69

C7 H8+ 3 69

c7 h+ 69

CrH^o 69

c7 h+ 70

c7 h- 70

c7 h+3 70

C7 Hr4 70

C7 H- 70

c7 h+ 70

C8 H+ 71

C«Hbt 71

c8 h7+ 71

c8 h+ 72

c«h9+ 72

ChH+o 73

CbH+ 74

ChH- 74

ChH+ 74

c9 h+ 75

c9 h7+ 75

c9 h8+ 75

c9 h+ 75

c9 h+ 76

c9 h8 d^ 76

c9 h+ 76

c9 h+ 77

C9H+ 77

c9 h+

0 77

c10 h8 77

CioH7 77

C10 H+ 77

C10 H+ 2 78

c10 h8+3 78

CloH^g 78

C10 H+ 79

CioH+g 79

CioH+

8 79

CioH^2 80

CUH+ 80

Ci,H+ 80

CiiH+

0 80

C11 H+ 80

C 11 H+ 80

CiiH+

8 81

CnH+ 81

Cj2 H^ 81

Ci2 H+ 81

Page

C12 H+ 2 81

c12 h+ 81

C12 H+ 81

C12 H+ 2 82

C12 H+ 82

C«H+ 82

c13 h+ 82

c13 h+ 82

c18 h+ 82

Cl3H+9 82

Ci3 H^8 82

Ci4 H+ 82

Ci 4 H+ 83

Ci4 H+ 83

c, 4 h+ 2 83

C14 H3+ 83

ClsH^s 83

c15 h3+ 83

c16 h+ 84

Ci6H^5 84

Cl6Hg"4 84

Ci 7 H+

6 84

CisH+2 84

c18h+ 84

CisH+9 85

C18 H3- 85

Ci»h+ 85

C 19 H+ 85

c20 h+ 85

C20 H+3 85

C21 H+ 85

c22 h+ 85

c22 h+ 86

c22 h+

7 86

C23 H+J 86

c24 h+ 86

C24 H41 86

c25 h+ 86

c26 h+ 87

c28 h+ 87

QboH^ 87

c32 h+ 87

c34h+ 87

CB+ 88

CB+ 88

c2 b+ 88

C2 H5 Ll| 88

C4 HioLi3 88

CeHisLi^ 88

C8 H20 Li+ 88

Ci 0 H25 Li+ 88

ch3 b+

Page

88

c2 h6 b

+ 88

c3 h9 b

+ 88

C4 Hi 0B+ 88

c6 h15 b+ 88

C2 Hi 8 B

+

0 88

N

N+ 89

N+ 90

N2+ 2 90

n3+ 90

NH+ 90

NH+ 90

m 91

NHJ2 91

N2 H+ 91

n2 h+ 91

N2 H3+ 92

n2 h+ 92

n3 h+ 92

n3 h3+ 92

CN+ 92

C2 N+ 92

c3 n+ 93

c4 n+ 93

c5 n+ 93

CeN+ 93

C2 N+ 93

c4 n+ 93

C.N+ 93

CHN+ 93

CH2 N+ 93

ch4 n+ 93

ch2 d2 n+ 93

ch5 n+ 94

C>HN+ 94

C,H2 N+ 94

c2 h3 n+ 94

c,h4 n+ 94

C,H.-,N+ 95

C2 E; N+ 95

C2 H7 N+ 96

c3 hn+ 96

c3 hn+ 2 96

c3 h,n+ 96

c3 h3 n+ 96

c3 h4 n+ 96

c3 h5 n+ 96

C3H6 N+ 96

c3 h7 n+ 96

c3 h9 n+ 96

c4 h4 n+ 97

c4 h5 n+ 97

6
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

c4 h6 n+

Page

97

c4 h7 n- 97

c4 h8 n+ 97

c4 h9 n+ 97

c4 h„n+ 98

c5 h3 n- 98

c5 h4 n- 98

c5 h2 d2 n+ 99

c5 h5 n+ 99

c5 h6 n- 99

c3 h„n- 100

c5 h, 2 n- 100

CbH,8 N+ 100

QHiN- 100

ChH«N+ 100

c6 h7 n- 101

c«h13 n- 102

ChH15 N+ 102

c7 h5 n- 102

c7 h7 n- 103

C7 H8 N- 103

c7 h9 n+ 103

C8 Hfi N+ 104

c8 h7 n+ 104

c8 h10 n- 104

c8 h„n+ 104

c8 h19 n+ 104

c9 h13 n+ 105

c9 h21 n+ 105

c10 h15 n- 105

c„h17 n- 105

c,2 hu n+ 105

c, 2 h19 n- 105

c14 h23 n- 105

c, 8 h, 5 n+ 105

CHN+ 106

ch2 n2+ 106

ch3n- 106

ch4 n+ 106

ch5 n+ 106

ch6 n- 107

c2 h5 n- 107

c2 h6 n+ 107

c2 h7 n2- 107

c2 h8 n+ 107

c3 h7 n- 108

c3 h8n+ 108

c3h9 n- 108

C;! H1(,N2+ 108

c4 h3 n2+ 108

c4 h4 n+ 108

C4 H10 N- 108

c4 hu n+ 108

c4 h12 n+ 109

CsHeN* 109

Page

c5 h12 n+ 109

c5 h13 n- 109

c5 h14 n- 109

c«h8 n+ 109

C, 0 H16 N- 109

CHN+ 2 109

CH3 N+ 109

c10 h15 bn2+2 110

ChH18 BN3+ 2 110

o

0+ no

04 111

03+ 112

OH- 113

H2 0- 113

d2 o- 113

H:s O- 113

ho- 113

h2 o- 114

Li2 0+ 114

BeO- 114

Be2 0- 114

Be2 04 114

Be:! O.J 114

Be3 0+ 114

BO- 114

BO- 114

CO- 114

CO- 2 115

co2 115

CO- 2 116

NO- 116

NO+ 2 117

N2 0+ 117

NO- 118

B3 H2 0+ 119

b3 h3 o+ 119

CHO+ 119

CDO+ 119

CH2 0+ 119

cd2 o- 120

ch3 o+ 120

CH-DO+ 121

ch4 o- 121

c2 ho- 121

C.H.O- 121

c2 h3 o- 122

c2 d3 o- 122

C2 H4 O- 123

C2 H50+ 123

Page

c2 h4 do- 123

c2 h8 o- 124

C3HO+ 124

CsHiO- 124

c3 h,o- 124

C.3H5O+ 125

c3 h; o- 125

c3 h7 o- 126

c3 h8 o- 126

c4 h4 o- 126

c4 h8 o+ 126

c4 h7 o- 127

c4 h8 o+ 127

c4 h9 o- 127

C4 Hi 0 O- 127

c5 h8 o- 127

c5 h8 o- 128

c5 h9 o+ 128

c5 h10 o+ 128

c6 h5 o- 128

c6 h,; o- 129

c6 h8 o- 129

CfiHioO- 129

C6H120- 129

c6 h7 d5 o- 129

ChH14 0- 130

c7 h5 o+ 130

C7 Hk O- 130

c7 h7 o- 131

C7 H*0- 131

c7 h14 o- 131

c8 h«; o- 131

c8 h7 o- 132

C.H.O+ 132

c8 h9 o- 132

c8 h7 d2 0- 132

ChH6 D3 0- 132

c8 h10 o- 133

C9 Hi 0 O- 133

c12 h8 o- 133

c12 h9 o- 133

C12H10O- 133

c13 hi() o+ 133

c14 h12 o- 134

CHO- 134

ch2 o+ 134

CH3 0- 134

c2 h2 o+ 134

c2 h3 o- 134

c2 h4 o- 134

c2 hd3 "o+ 134

c2 h5 o- 135

c3 h4 o+ 135

c3 h5 o2- 135

c3 h4 d"o+ 135

Page

c3 h3 d2 o+ 135

C3 H,i0.7 135

C3 H4D2 0+ 135

c3 h7 o- 135

C3 H8 02 136

C4 H8 02 136

c4 h8 o+ 136

C4 H9 04 136

C4 HioO+ 136

c5 h4 o- 136

c5 h8 o- 137

C5 H1 oO- 137

C5H120J 137

C6 H4 0+ 137

C(; H(; O.J 137

C,;Hi 2 6+ 137

c7 h8 o+ 137

c7 h8 o- 137

c8 h8 o- 138

C9 HioO+ 138

Ci3 H10 O+ 138

c14 h10 o- 138

Ci4 Hi 2 0+ 138

c4 h8 o+ 138

c4 h9 o+ 139

c8 h8 o- 139

C9 Hio03+ 139

c13 h10 o3+ 139

CeHnO- 139

HNO+ 139

c2 h«bo+ 139

c2 h5 bo- 139

CoHhBO- 139

c,h7 bo- 139

C2 Hfi BO + 139

C3 H9 BO+ 140

ch3 no+ 140

c2 h5 no- 140

c3 h7 no- 140

c4 h9 no- 140

C-4CNO- 140

c5 h„no+ 140

ChH5 NO- 140

c8 h7 no- 140

ChH13 NO- 140

c7 h5 no+ 140

c7 h7 no+ 141

c7 h9 no- 141

C8 Hr,NO- 141

C8 H9 NO- 141

c9 h7 no- 141

7
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Page

c13 h„no+ 141

c14 h9 no+ 141

c2 hn2 o+ 141

C3H4N20 142

c8 h5 n2 o+ 142

c8 h6 n2 o+ 142

Ci 4 Hi 0 N2 O+ 142

ch2 no2+ 142

CH3NO+ 142

C2 H5 NO+ 142

c3 h7no+ 142

c4 h5 no+ 143

c6h5no2+ 143

c6 h13 no2+ 143

C7 H«N02+ 143

c7 h7 no+ 143

c8 h9 no2+ 143

c»h7 no+ 143

c6h6n2 o+ 143

CH2 NO} 143

C2 H5 NC>3+ 143

C3 H7 NO+ 144

c6 h5 no3+ 144

c7 h5 no3+ 144

c8 h7 no3+ 144

c13 h9 no3+ 144

c8 h7 no+ 144

F

F

+ 144

F2+ 145

HF+ 145

XeF+ 145

XeF+ 145

Xef 145

XeF+ 145

LiF+ 145

Li2 F

+ 145

BeF+ 145

BeF+ 145

BF+ 145

BF+ 146

BFJ 146

CF+ 146

C3F+ 146

c5f+ 146

cf2+ 147

CFJ 2 147

c2 f2+ 147

Page

c3 f2+ 147

c4 f+ 147

c5 f2+ 147

CF+ 148

CF+2 148

C2F+ 149

c3 f3+ 149

C5F3+ 149

cf+ 149

c2 f4+ 149

c3f+ 149

c5 f+ 149

c2 f- 150

c3 f+ 150

c4 f- 150

C-F+ 150

CeF- 150

C3 F6t 151

C4 F6t 151

c6 f+ 151

c3 f7+ 151

c4 f+ 151

c5 f+ 151

C11F+ 151

C4FJ 151

c7 f+ 151

C12F+ 152

C5F+ 152

CeFj 152

C12F+ 152

CsF+o 152

c6 f+ 152

Ci2 F+0 152

c6 f+ 152

C17F+ 152

CeF+ 152

c18f+ 152

c7 f+3 153

CisF+3 153

tv^ 7 f+r 14 153

Ci 8 F+ 153

C24F

8 153

NF+ 153

N2 F

+ 153

NF+ 153

n2 f+ 153

NF+ 153

n2 f3+ 154

n2 f+ 154

OF+

Page

154

02 F+ 154

OF.+ 154

CHF+ 154

CH2 F

+ 154

ch3f

+ 154

c2 hf+ 155

c2 h2 f+ 155

C2 H3F+ 155

c2 r,f+ 155

c3 h2 f

+ 155

c3 fuf+ 155

C4 H3F+ 155

c5 h4 f+ 155

c6 h4 f

+ 155

c6 h5f

+ 156

c7 h6f+ 156

c7 h7 f+ 156

CHF+ 156

ch2f+ 156

c2 hf+ 156

c2 h2 f+ 157

C.H.F+ 157

c2 h4f2+ 157

c3 hf+ 157

c3 h2 f2+ 157

c3 h3 f+ 157

c3 h4f+ 157

c3 h5 f+ 157

c4 h2 f+ 157

c6 h3 f2+ 157

c6 h4 f+ 158

C2 HF+ 158

c2 h2 f3+ 158

c3 h2 f3+ 158

c3 h3 f3+ 158

c6 h2 f3+ 158

CeH^ 158

c7 h5 f+ 158

C7 HuF3+ 159

c6 hf+ 159

c6 h2 f+ 159

c6 hf+ 159

C^FJ 159

c6 f15 n+ 159

c7f5 o+ 159

C8F8 0+ 159

ch2 bf+ 159

ch3 bf+ 159

c2 h2 bf+ 160

C2 H3BF+

Page

160

C2 H4BF+ 160

c2 h5 bf+ 160

CFFBF+ 160

C2 H3 BF+ 160

C2 H4BF2+ 160

C2 H5BF2+ 160

c8 h10 nf+ 160

c6 h5 of+ 160

c7h5 of+ 160

c8 h5 of3+ 160

c8 h3 of5+ 161

C5H30F+ 161

C7 H2 NOF+ 161

Ci9Hi0 N4 O2 F+ 161

CnH5 N2 OF+ 161

c15 h5 n2 of+ 161

Na

Na+ 161

Na+2 161

Na+3 161

Na+ 161

Mg

Mg+ 161

MgF+ 162

MgF+ 162

Mg>F+ 162

A1

Al+ 162

A10+ 162

A12 0+ 162

ai2 o+ 162

A1F+ 162

A1F+ 162

Si

Si + 162

Si2+ 163

Si^ 163

SiH+ 163

SiH2+ 163

SiH- 163

Si2 H+ 163

SiB + 163

8
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Page

SiC + 163

SiQ 164

Si2 C+ 164

Si2 C+ 164

Si2 C+ 164

Si3 C

+ 164

SiO+ 164

SiF+ 164

SiF+ 164

CHSi+ 164

CH2 Si + 164

CH3 Si + 164

CH4 Si + 164

CH5 Si + 164

C2 fi6 SP 164

C2 H7 Si + 165

C2 H8 Si + 165

C3 H9 Si + 165

C3 HioSi+ 165

C4 HnSi+ 165

C4 Hi2 Si + 165

C5 H14 Si+ 165

CeHi6Si+ 165

C7 H18 Si+ 165

vC5 Hi5Si.J 166

CeHi8 Si.t 166

BCSi+

‘ 166

C7 H19SiN+ 166

C3 H9 SiO+ 166

C4H12 SiO+ 166

C5 H15 Si2 0+ 166

CeHi8 Si2 0+ 166

C2 H6 SiF+ 166

C3 H9 SiF+ 166

P

P+ 166

p+2 167

1P+2 167

1P+3 167

P4+ 167

PH+ 167

pH+2 167

PH+ 167

ph2+2 168

ph3+2 168

ph2 d+ 168

PHD+ 168

pd3+ 168

PH>2 168

PH+ 168

P2 H+

Page

168

p2h+ 168

p2 h3+ 168

p2 h+ 169

p2 h3 d+ 169

p2 h2 d+ 169

PC+ 169

P0+ 169

P03+ 169

PF+ 169

A1P+ 169

CHP+ 169

CH2 P+ 169

ch3 p+ 169

CR.P+ 170

ch5 p+ 170

c2 h2 p+ 170

c2 h3 p+ 170

c2 h4 p+ 170

c2 h5 p+ 170

c2 h6 p

+ 170

c2 h7 p+ 170

c3 h8 p+ 170

c3 h9 p+ 170

c4 h10p+ 171

c4 hu p+ 171

c5 h12 p+ 171

c6 hI5 p+ 171

c18 h15 p+ 171

HPO+ 171

c3f9p+ 171

SiPH+ 171

ch4 po+ 171

C2 H6P03+ 171

c2 h7 po3+ 171

S

S

+ 171

°2s+ 172

°3S+ 172 s+ 172

S+ 172

s+ 172 s+°7 172

°8s+ 172

HS+ 172

H2 S

+ 173

h3 s+ 173

h2 ds+ 173

hd2 s

+ 173

d3 s

+ 173

Page

h2 s+ 173

CS+ 173

cs.t 174

CS+ 2 174

CS+ 3 174

NS+ 174

SO+ 175

SOJ 175

S2 0+ 175

sf3+ 175

SF+ 175

SFt 175

CHS+ 175

CDS+ 176

CH2 S

+ 176

CHaS+ 176 CH2 DS+ 177

chd2 s

+ cd3 s+

177

177 ch4 s

+ 177

ch5 s

+ 177

c2 h2 s

+ 177

c2 h3 s

+ 177

c2 h4 s

+ 178

c2 h5 s

+ 178

c2 h6 s

+ 178

C2 H3 D3 S

+ 178

c3 h5 s

+ 178

c3 h6 s+ 178

c3h7 s+ 179

c3 h8s+ 179

CJ^S* 179

C4 H3DS+ 179

c4 h7 s

+ 179

c4 h8 s

+ 179

C4 Hi 0S

+ 179

c5 h5 s

+ 180

c5 h9 s+ 180

c5 h„s+ 180

c6 h5 s+ 180

c6 h6 s+ 180

c6 h5 ds+ 180

CeH^ 180

CeHi4S

+ 180

c7 h7 s+ 180

c7 h8 s

+ 181

C7 Hi0S

+ 181

c8 h10 s+ 181

c8 h12 s

+ 181

CH3 SLt 181

ch4s+ 181

c2 h5 s2+ 181

c2 h6 s+ 181

c4 h8 s+

Page

181

c4 h10 s2+ 181

ch3 s+ 182

c2 h6 s3+ 182

CNS+ 182

c2 ns+ 182

cos+ 182

SOF+ 182

so2 f

+ 182

so2 f2+ 182

CHNS+ 183

CH2 NS+ 183

c2 hns+ 183

c2 hns+2 183

c2 h2 ns+ 183

c2 h3 ns+ 183

c3 h5 ns+ 183

c4 h10 ns+ 183

c7 h5 ns+ 183

c8 h7 ns+ 183

ch4 n2 s

+ 183

c2 h6 n2 s+ 183

c3 h6 n2 s+ 184

c3h8 n2 s+ 184

C4Hi 0N2 S

+ 184

c5 h12 n2 s

+ 184

c2 h4 so+ 184

c4 h10soj 184

Cl

CP 184

Clg 185

ci2

2 185

HCP 185

HCP2 185

XeCl4+ 185

LiCP 185

Li2 CP 185

BCP 185

BC1+ 185

BC1+ 2 185

BC1+ 186

CC1+ 186

CC1+ 186

CC1+ 186

CC14+ 186

C2 C1+ 186

CIO 186

C10+ 186

cio+ 187

FCP 187

9
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

F2 C1+

Page

187

f3 cp 187

MgCl+ 187

MgCl+ 187

Mg2Cl+ 187

SiCl+ 187

PCP 187

P2 C1+ 187

PCI? 187

P2 C1? 188

PCIJ 188

P2 C1? 188

P2 C1+ 188

CHC1+ 188

CH2 C1+ 188

ch3 ci+ 188

c2 hcp 189

c2 h2 cp 189

c2 h3 ci+ 189

C2 D3 C1+ 189

c2 h5 ci+ 189

c3 h3 cp 189

c3 h4 ci+ 189

c3h7 ci+ 190

c4 h9 cp 190

c5 h4 ci+ 190

c6 h5 cp 190

c7 h6 cp 191

c7 h7 cp 191

c7 h9cp 191

CHC1+ 191

CH2 C1+ 192

c2h2 ci+ 192

c2h4 ci+ 192

QiHtCl? 192

C3 H6 C1+ 192

c6h4 ci2+ 193

CHC1+ 193

C2 HC1? 193

c2h2 ci+ 193

CNC1+ 193

CFC1+ 193

CF2 C1+ 193

CFaCP 193

c2 f3 cp 194

C3F5 CP 194

CeFsCP 194

CFC1+ 194

CF2 C1? 194

c2 f2 cj+ 194

c4f6 ci+ 194

cfci3+ 194

c2 f3 ci+ 194

C103 F

+

Page

194

POC1+ 194

POC1+ 194

C5H4 NC1+ 194

c8h10nci+ 195

c2 h2 oci+ 195

C^OCP 195

C3 H50C1+ 195

c6 h5 ocp 195

c7 h5 oci+ 195

c8 h7 oci+ 195

c13h9 oci+ 195

C2 H402 C1+ 196

c3 h5 o2 cp 196

c8h7o2 ci+ 196

c7 h4 oci+ 196

CHFC1+ 196

C2 H2 FC1+ 196

c6h4fci+ 196

chf2 ci+ 196

c2 hf2 ci+ 196

c2 h3 f2 cp 197

c4 h2 f7 cp 197

CHFC1+ 197

C2 H6 SiCl+ 197

C3 H9 SiCl+ 197

CHaSiCl? 197

C2 H3 SiCl+ 197

C2 H5 SiCl+ 197

C3H7 SiClJ 197

C4 H3 C1S+ 197

c3 h3 n2 oci+ 197

c7 h4 no3 cp 197

c3 hn2 oci+ 197

K

K+ 197

Ca

Ca+ 198

Ca+ 2 198

CaO+ 198

CaF+ 198

Sc

Sc+ 198

ScF+ 198

ScF2+ 198

Y

V+ 198

c3 h3 v+ 198

C5 H5 V+ 198

c6 h5 ov+ 198

c7 h5 o,v+ 199

C9 H504 V+ 199

Cr

Cr+ 199

CrO+ 199

CrO+ 199

CrO+ 199

CrF+ 199

CrF? 199

CrCP 199

CrCl2 199

CrCO+ 199

CrC2 02 200

CrC3 03 200

CrC4 0+ 200

CrC5 0^ 200

CrC6 Og 200

CrOF+ 200

Cr02 F

+ 200

CrOF+ 200

Cr02 F+ 200

CrOCP 200

Cr02 Cl+ 200

CrOCl? 200

Cr02 Cl^ 200

Mn

Mn+ 201

MnF+ 201

MnF+ 201

CsHsMrP 201

C«H5 OMn+ 201

C8 H5 03 Mn+ 201

Fe

Fe+ 201

FeF+ 201

FeF+ 201

FeCP 201

FeCl2 201

Fe2 Cl+ 201

Fe2 Cl+ 202

FeCo+ 202

FeCo+2

Page

202

FeC2 0 2 202

FeC3 Oj 202

FeC4 04 202

FeC5 0+ 202

Co

Co+ 202

C3 H.3 Co+ 202

C5 E5Co+ 202

CoCO+ 202

C6 H5 OCo+ 203

C7 Hs02 Co+ 203

Ni

Ni+ 203

NiO+ 203

NiF+ 203

NiF+ 203

NiCP 203

NiCl+ 203

NiCO+ 203

NiC2 02+ 203

NiC3 03+ 203

NiC4 04+ 203

C11

Cu+ 204

CuF+ 204

CuF2+ 204

Ge

Ge+ 204

Ge+ 204

Ge+ 204

GeH+ 204

GeRt 204

GeH+ 204

Ge2 H+ 204

Ge2 H? 204

Ge2 H3 205

Ge-2 H4 205

Ge2 H^ 205

Ge2 Hg 205

Ge3 H+ 205

Ge3 H+ 205

Ge3 H? 205

10
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ge.iHj

Page

205

Ge3 H+ 205

Ge3 Hbt 205

Ge3 H+ 205

Ge:jHb 205

GeO+ 205

Ge2 0+ 205

Ge2 CR 206

Ge.jO^ 206

CH.3 Ge+ 206

C2 H«Ge+ 206

C3 H9 Ge+ 206

C4 H12 Ge+ 206

GeSiHg 206

As

As+ 206

As+ 206

AsH+ 206

AsH+ 206

AsH+ 206

As2 H+ 207

As2 H+ 207

As2 H+ 207

As2 H+ 207

AsClJ 207

CH5 As+ 207

C2 H7 As+ 207

C3H9 As+ 207

Ci8 Hi5As+ 207

C3 F9As+ 207

C3 H6F3As+ 207

C2 HF6As+ 207

C3 H3 FeAs+ 207

C2 H6C1As+ 207

CH3 C12 As+ 207

C2 F6C1As+ 208

Se

Se+ 208

Br

Br+ 208

Br+ 208

BrJ2 208

HBr+ 208

DBr+ 2 209

LiBr+ 209

Li2 Br+ 209

BBr+ 209

BBr+

Page

209

BBr+ 209

CBr+ 209

CBr+ 209

CBr+ 209

CBr+ 209

BrF+ 209

BrF+ 209

BrF+ 210

BrF+ 210

MgBr+ 210

MgBr+ 210

Mg2 Br+ 210

BrCl+ 210

FeBr+ 210

FeBr+ 210

Fe2 Br+ 210

Fe2 Br+ 210

BsHsBi^ 210

CH2 Br+ 210

CH3Br+ 211

C2 H2 Br+ 211

C2 H3 Br+ 211

C2 H3 Br+ 211

C3 H3Br+ 211

C3 H5 Br+ 211

C3 H7 Br+ 212

C4H9Br+ 212

C5 H4 Br+ 212

C5 Hu Br+ 212

CeH5 Br+ 212

C7 H7 Br+ 212

CHBrJ 213

CH2 Br+ 213

C2 H2 Br+ 213

C2 H4 Br+ 213

C3H6 Br+ 213

CHBr+ 213

C2 HBr+ 213

CNBr+ 213

CF2 Br+ 213

CF3 Br+ 213

C6F5 Br+ 214

CF2 Br+ 214

CFBrf 214

C5 H4 NBr+ 214

C8 H10NBr+ 214

CioHi 4 NBr+ 214

C2 H3OBr+ 214

C6H5 OBr+ 214

C7 H5 OBr+ 214

C8H7 OBr+ 214

Ci3H9OBr+ 214

C3 H5 02Br+

Page

215

C8 H7 02 Br+ 215

C6H4 FBr+ 215

C2 H3 FBr+ 215

C2 H2 F2 Br+ 215

C2 H6 SiBr+ 215

C3 H9 SiBr+ 215

C4 H3BrS+ 215

CHoClBr+ 215

C2 H4 ClBr+ 215

CHCl2 Br+ 215

CHClBrJ 215

Rb

Rb+ 215

Sr

Sr+ 215

Sr+2 216

SrO+ 216

Sr2 0+ 216

SrF+ 216

Y

Y+ 216

YC+ 216

YC+ 216

YO+ 216

YF+ 216

YF+ 216

YC1+ 216

YClJ 216

YC1+ 217

Y2 C15+ 217

Mo

Mo+ 217

MoC+ 217

MoO+ 217

MoO£ 217

MoO+ 217

Mo2 0+ 217

Mo2 0^ 217

Mo3Oj 217

Mo30+ 217

MoCO 217

MoCO+2 217

MoC2 O.J 218

MoC2 OJ 2 218

MoC3 OJ 218

MoC3 OJ2 218

MoC4 04+

Page

218

MoC5 0+ 218

MoCeOj 218

SrMoO+ 218

SrMoO^ 218

SrMo04 218

Ru

Ru+ 218

RuO+ 218

RuOj 219

RuO+ 219

RuO+ 219

Rh

Rh+ 219

RhO+ 219

RhO+ 219

Pd

Pd+ 219

PdO+ 219

Cd

Cd+ 219

CdCl+ 219

CdCp 219

In

In+ 219

Ir7 219

ln2 0+ 219

Sn

Sn+ 220

Stp 220

SnH+ 220

SnH.+ 220

SnH+ 220

Sn2 H+ 220

Sn2 H2+ 220

Sn2 Hj 220

Sn2 H^ 220

Sn2 Hbt 221

SnO+ 221

Sn2 0+ 221

Sn2 0.^ 221

Sr^Qt 221

11
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Srt40+

Page

221

SnS + 221

Sn2 S 221

S112S2 221

SnSe+ 221

Sn2 Se: 221

CH3 Sn+ 221

C2HeSn+ 221

C3 H9Sn+ 221

C4Hi2 Sn+ 222

Sb

Sb+ 222

Sb+ 222

Sb3 222

Sb4+ 222

SbH+ 222

SbH+ 222

SbH3+ 222

Sb2 H+ 222

Sb2 H+ 222

Sb2 H+ 222

Sb2 H^ 222

InSb+ 223

InSbJ 223

Ci 8 Hi5 Sb+ 223

Te

Te+ 223

TeJ 223

GeTe+ 223

GeTe2 223

SnTe+ 223

I

1+ 223

I

2+ 224

HI+ 224

HI+2 224

Lil+ 224

Li2 I + 224

Li3 I+ 224

BI+ 224

BI+ 224

BI3 224

CI+ 224

IF+ 225

if2+ 225

if3+ 225

if: 225

if: 225

Nal+ 225

Na2 I + 225

Page

2cuCO HH 225

Mgl+ 225

Mgi: 225

MftlJ 225

IC1+ 225

KI+ 225

k2 i + 225

IBr+ 226

Rbl+ 226

Rb2 I + 226

b5 h8i+ 226

ch2 i + 226

ch3 i + 226

C2 H5 I + 227

C3 H7 I+ 227

c4 h9i + 227

c5 h„i+ 227

c6 h5 i + 227

c7 h7 i+ 227

CNI+ 228

cf2 i + 228

cf3 i+ 228

c6f5 i + 228

c3 f7 i + 228

LiNaI+ 228

LiKI+ 228

LiRbI+ 228

c8 h10ni+ 228

c2 h2 f3 i + 228

c4h2 f7 i + 228

c6h4 cii + 228

Cs

Cs+ 228

Csl+ 229

Cs2 I + 229

CsCdCR 229

LiCsI+ 229

Ba

Ba+ 229

Ba+2 229

Ba+3 229

BaO+ 229

BaF+ 229

Bal + 229

Bal2 229

BaOH+ 229

La

La+ 229

LaF+ 230

LaF+ 230

Nd

Page

Nd+ 230

Sm

Sm+ 230

Eu

Eu+ 230

Dy

Dy+ 230

Ho

Ho+ 230

Er

Er+ 230

Tm

Tm+ 230

Lu

Lu+ 230

Ta

TaO+ 230

TaO^ 230

w

w+ 230

wc+ 230

wo+ 231

wo2+ 231

wo: 231

w2 o+ 231

w2 o: 231

w3 o8+ 231

w3 oq+ 231

wco+ 231

wc2 o+ 231

WC20+ 231

wc3 o3+ 231

wc4 o4+ 231

wc5 o: 231

wc6 o6+ 232

CaW03+ 232

CaWO+ 232

SrWO: 232

SrWO: 232

SnWO+ 232

Sn2 W05+ 232

Re

Page

ReCl: 232

ReCl4+ 232

Re2 Cl: 232

Re2 Cl: 232

Re3 Cl+ 232

Re3 Cl: 232

Os

Os+ 232

OsO+ 233

OsO: 233

0s0: 233

OsO+ 233

Ir

Ir+ 233

IrO+ 233

IrO: 233

IrO: 233

Hg

Hg+ 233

Hg+2 233

Hg+3 233

Hg+4 233

Hg+5 234

Hg+6 234

CH3 Hg+ 234

C2 H5Hg+ 234

C2 H6 Hg+ 234

C3 H7 Hg+ 234

C4 Hi 0 Hg+ 234

C6 Hi4 Hg+ 234

CH3 HgCl+ 234

T1

Ti+ 234

Pb

Pb+ 234

PbH+ 235

PbH: 235

PbH: 235

PbO+ 235

Pb2 0+ 235

pb2 o2+ 235

Pb3 o2+ 235

pb3 o: 235

pb4 o4+ 235

12
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

PbSPage

235

Pb2 S- 235

PbCl- 235

PbCL- 235

CH3 Pb+ 235

C2 H6 Pb+ 235

C3 H9 Pb+ 236

C4 Hi2 Pb+ 236

RbPbCL- 236

CsPbCl- 236

Page

Bi

Bi + 236

Bi- 236

BiH+ 236

BiH- 236

BiH3+ 236

BiS+ 236

Bi2 S

+ 236

CigHisBi- 236

Page

At

At- 236

u

U+ 237

U0+ 237

U0.+ 237

UO- 237

Page

Pu

Pu- 237

Am

Am+ 237

13

323-656 0- 69—2
3. TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of

Formation of Gaseous Positive Ions

Computed heats of formation used in arriving at a recommended value are indicated with an asterisk.

Where only one such value is so indicated and there

is no ambiguity as to the structure of the ion, this

corresponds to the recommended value. In those cases where the recommended value is based on

the average of several measurements or where

there is any ambiguity as to the structure of the

ion, the recommended values are listed in a separate

heading preceding each set of data.

The letters (a) and (b) indicate that the heat of

formation of a neutral reactant or product has

been calculated instead of that of an ion. These

are listed separately in table 2. All cyclic reactants are named.

TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions

Ion Reactant

Other AP or IP

products (eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

H+ Heat of formation 366 kcal mol-1

H+ H 13.598 S 366* 2113

H+ H 13.5 ±0.2 NS 363 87

(El on neutral fragment from benzene)

H+ H 13.6 ±0.2 NS 366 87

(El on neutral fragment fro m n-C4Hio)

H+ h2 H- 17.3 VC 200

H+ c3 h8 20.0 ±0.3 VC 1408

H+ c3 h8 22.0 ±0.5 VC 1408

H+ HF F- 15.9 RPD 286

H+ HC1 Cl- 14.5 RPD 199

D+ Heat of formation 367 kcal mol-1

D+ D 13.602 S 367* 2113

D+ d2 25.3±0.2 SRP 1264

(Excess KE ion)

H<f Heat of formation 356 kcal mol-1

Ht h2 15.427 ±0.002 S 356* 2095

H| h2 15.42 ±0.01 PI 356 1118,1143

H} h2 15.3 ±0.3 PI 353 230

h2 15.41 PE 355 248

H+ h2 15.44 ±0.01 PE 356 1050

m h2 15.50 ±0.03 RPD 357 1012

Ht h2 15.4 RPD 355 1121

Hi h2 17.3±0.2 RPD 119

H+ h2 15.51 ±0.10 CS 358 383

H2 h2 15.43 MSD 356 1251

Hi C3 Hh 16.4±0.5 VC 1408

H+ C3 H8 25.7±0.5 VC 1408

HJ c3 h8 27.6±0.5 VC 1408

HD+ Heat of formation 356 kcal mol~ l HD+ HD 15.46 PI 356* 1143

Heat of formation 356 kcal mol 1

D+ D2 D+ D2

14

15.46±0.01

15.5

PI

RPD

356* 1118,1143

357 1121
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other AP or IP

products (eV) Method

Heat of

formation

(kcal moL 1 )

Ref.

He+ Heat of formation 567 kcal mol -l

He+ He 24.586 ±0.002 S 567* 2113

He+ He 24.6 ±0.1 PI 567 163

He+ He 24.59 ±0.03 RPD 567 1012

He+ He 24.65 ±0.1 FDP 568 1051

He+ He 24.65 ±0.1 FDP 568 1172

He+ He 24.53 ±0.08 LE 566 2032

Ne + Heat of formation 497 kcal mol-l

Ne+ Ne 21.564 S 497* 2113

Ne+ Ne 21.8±0.5 PI 503 163

Ne+ Ne 21.52 ±0.03 RPD 496 1012

Ne+ Ne 21.61 ±0.2 EVD 498 52

Ne+ Ne 21.75±0.3 EVD 502 52

Ne+ Ne 21.62 ±0.05 CS 499 383

Ne+ Ne 21.75 ±0.05 FDP 502 1051

Ne+ Ne 21.75 ±0.05 FDP 502 1172

Ne+ Ne 21.60±0.08 LE 498 2032

Ne + 2 Heat of formation 1445 kcal mol 1

Ne+2 Ne 62.64 S 1445* 2113

Ne+2 Ne 62.5 LE 1441 1240

Ne +3 Heat of formation 2906 keal mol 1 Ne + 3 Ne 126 S 2906* 2113

Ne + 3 Ne 129 LE 2975 1240

Ne+ 4 Heat of formation 5166 kcal mol 1

Ne+4 Ne 224 S 5166* 2113

Ne+4 Ne 246 LE 5673 1240

Ne+5 Heat of formation 8071 keal mol 1

Ne+5 Ne 350 S 8071* 2113

Ne+5 Ne 900 LE 20755 1240

Ar+(2 P3/2 ) Ar

Ar+(2 P3/2 ) Ar+

(

2 P1/2 ) Heat of formation 363 kcal mol 1 368 kcal mol-1

15.759 S 363* 2113

Ar+

( 2 P3/2 ) Ar 15.74 PI 363 2034

Ar+(2P3/2 ) Ar 15.76±0.01 PI 363 1118

Ar+(2 P3/2 ) Ar 15.76 PI 363 2200

Ar+(2 P3/2 ) Ar 15.7 ±0.1 PI 362 230

Ar+(2P3/2 ) Ar 15.79 PE 364 248

Ar+

( 2 P3/2 ) Ar 15.74 ±0.2 RPD 363 224

Ar+ Ar 15.60 ±0.2 EVD 360 52

Ar+ Ar 15.720 LE 363 35

Ar+ Ar 15.739 LE 363 35

Ar+ Ar 15.83 ±0.08 LE 365 3

Ar+ Ar 15.83 ±0.08 LE 365 2032

15
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other AP or IP

products (eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

Ar+(2Pi/ 2 ) Ar 15.937 S 368* 2113

Ar+(2P1/2 ) Ar 15.93 PI 367 1118

Ar+

( 2 P 1 / 2 ) Ar 15.94 PI 368 2200

Ar+(2P1 / 2 ) Ar 15.95 PI 368 2034

Ar+(2P1 / 2 ) Ar 16.0±0.2 PI 369 163

Ar+(2P 1 / 2) Ar 15.93 PE 367 248

Ar+2 Heat of formation 1001 kcal mol 1

Ar+ 2 Ar 43.39 S 1001* 2113

Ar+ 2 Ar 43.4 ±0.3 RPD 1001 198

Ar+ 2 Ar 43.3 NRE 999 211

Ar+ 2 Ar 43 LE 992 1240

Ar+ 3 Heat of formation 1944 keal mol 1

Ar+3 Ar 84.30 S 1944* 2113

Ar+ 3 Ar 84.8 ±0.5 RPD 1956 198

Ar+3 Ar 83.7 ±0.5 NRE 1930 25

Ar+ 3 Ar 84.0 NRE 1937 211

Ar+ 3 Ar 84.3 LE 1944 1040

Ar+3 Ar 85 LE 1960 1240

Ar+4 Heat of formation 3323 kcal mol-1

Ar+ 4 Ar 144.1 S 3323* 2113

Ar+ 4 Ar 150. 0±5 RPD 3459 198

Ar+ 4 Ar 147 LE 3390 1240

Ar+ 5 Heat of formation 5053 kcal mol 1

Ar+ 5 Ar 219.1 S 5053* 2113

Ar+5 Ar 285 LE 6572 1240

Ar+ 6 Heat of formation 7158 keal mol-1

Ar+ 6 Ar 310.4 S 7158* 2113

Ar+6 Ar 430 LE 9916 1240

Kr+(2 P3/ 2 ) Heat of formation 323 kcal mol 1 Kr+

(

2 P'1/2“) 338 keal mol 1

Kr+(2P3/2 ) Kr 13.999 S 323* 2113

Kr+(2P3/ 2 ) Kr 13.999 ±0.002 PI 323 1253

Kr+(2P3/2 ) Kr 14.01 ±0.01 PI 323 1118

Kr+(2P3/2 ) Kr 14.05 PE 324 248

Kr+(2P3/2 ) Kr 14.00 ±0.02 RPD 323 224

Kr+(2 P3/2 ) Kr 14.00 ±0.03 RPD 323 1012

Kr+ Kr 14.01 ±0.03 SL 323 1047

Kr+ Kr 13.979 LE 322 35

Kr+ Kr 14.012 LE 323 35

Kr+ Kr 14.01 ±0.08 LE 323 2032

Kr+ Kr 14.35 ±0.1 RPD 331 224

(Autoionizing level?)

Kr+(2 P 1/2 ) Kr 14.665 S 338* 2113

Kr+(2Pi/2 ) Kr 14.69 ±0.01 PI 339 1118

Kr+(2P1 / 2 ) Kr 14.69 PE 339 248

Kr+(2Pi/2 ) Kr 14.70 ±0.1 RPD 339 224

16
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

Kr+2 Kr

Kr+2 Heat of formation 889 kcal mol"

38.57

-

s 889* 2113

Kr+ 2 Kr 38.45 ±0.1 RPD 887 198

Kr+ 2 Kr 38.5 VC 888 201

Kr+ 2 Kr 38.5 VC 888 211

Kr+2 Kr 38.1 ±0.1 NRE 879 211

Kr+2 Kr 38.0 ±0.5 NRE 876 201

Kr+2 Kr 38 LE 876 1240

Kr+ 3 Kr

Kr+ 3 Heat of formation 1741 kcal mol

75.5

-

S 1741* 2113

Kr+ 3 Kr 75.6 ±0.5 RPD 1743 198

Kr+3 Kr 77 VC 1776 211

Kr+ 3 Kr 73.3 ±0.2 NRE 1690 211

Kr+3 Kr 76 LE 1753 1240

Kr+ 4 Kr

Kr 4

130.0 VC 2998 201

Kr+ 4 Kr 130 VC 2998 211

Kr+ 4 Kr 147 ±2 VC 3390 198

Kr+ 4 Kr 118 ± 1 NRE 2721 211

Kr+ 4 Kr 117.5 ±2 NRE 2710 201

Kr+4 Kr 134 LE 3090 1240

Kr+ 5 Kr

Kr 5

195 VC 4497 211

Kr+ 5 Kr 218± 10 VC 5027 198

Kr+5 Kr 181 ±2 NRE 4174 211

Kr+5 Kr 204 LE 4704 1240

Kr+e Kr

Kr+ 6

310 VC 7149 211

Kr+6 Kr 350 ±10 VC 8071 198

Kr+e Kr 275 ±10 NRE 6342 211

Kr+6 Kr 302 LE 6964 1240

Kr+2 Kr

Kr 7

470 LE 10839 1240

Kr+8 Kr

Kr+ 8

670 LE 15451 1240

Xe+(2P3/2 ) Xe

Xe +

(

2 P3/ 2 ) Heat of formation 280 kcal mol -1

Xe+

(

2 Pi/2 ) 310 kcal mol-1

12.130 S 280* 2113

Xe+(2 P3/2 ) Xe 12.129 ±0.002 PI 280 1032

Xe+(2P3/2) Xe 12.12 ± 0.01 PI 279 1118

Xe+(2P3/2 ) Xe 12.17 PE 281 248

Xe+(2P3/2 ) Xe 12.05 ±0.1 EVD 278 52

17
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other AP or IP

products (eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

Xe+ Xe 12.082 LE 279 35

Xe+ Xe 12.120 LE 279 35

Xe+ Xe 12.10 + 0.08 LE 279 2032

Xe+ Xe 12.0±0.1 LE 277 2053

Xe+

( 2 Pi/2 ) Xe 13.436 S 310* 2113

Xe+

( 2 Pi /2 ) Xe 13.426 ±0.007 PI 310 1032

Xe+

( 2 P1 / 2) Xe 13.44 ±0.01 PI 310 1118

Xe+

( 2P1 / 2) Xe 13.49 PE 311 248

Xe+ XeF2 F+F-? 12.0±0.1 LE 297 2053

Xe+ XeF4 F2 + F + F-? 12.4±0.1 LE 280 2053

Xe + 2 Heat of formation 769 kcal mol~ 1

Xe+ 2 Xe 33.33 S 769* 2113

Xe+2 Xe 33.3 VC 768 211

Xe+2 Xe 33.5 VC 773 201

Xe+ 2 Xe 33.5 ±0.2 NRE 773 211

Xe+ 2 Xe 33.3 ±0.5 NRE 768 201

Xe+2 Xe 33.5 ±0.5 NRE 773 25

Xe+2 Xe 33 LE 761 1240

Xe+2 Xe 34.3 ±0.5 NRE 25

Xe+2 Xe 35.3±0.5 NRE 25

Xe+ 3 Heat of formation 1508 kcal mol -

Xe+3 Xe 65.4 S 1508* 2113

Xe + 3 Xe 65.4 VC 1508 211

Xe+3 Xe 66.5 VC 1534 201

Xe+3 Xe 64.8 ±0.5 NRE 1494 25

Xe + 3 Xe 64.8 ±0.5 NRE 1494 211

Xe+3 Xe 64.3 ±1 NRE 1483 201

Xe+3 Xe 65 LE 1499 1240

Xe+3 Xe 67.3 ±0.5 NRE 25

Xe+ 4

Xe+4 Xe 107 VC 2468 201

Xe+4 Xe 111 VC 2560 211

Xe+ 4 Xe 107 ±1 NRE 2468 25

Xe+4 Xe 107 ±1 NRE 2468 211

Xe+4 Xe 103 ±2 NRE 2375 201

Xe+4 Xe 110 LE 2537 1240

Xe+5

Xe+5 Xe 170 VC 3920 201

Xe+5 Xe 171 VC 3943 211

Xe+5 Xe 160 ±1 NRE 3690 25

Xe+5 Xe 160 ±1 NRE 3690 211

Xe+5 Xe 157 ±3 NRE 3621 201

Xe+5 Xe 172 LE 3966 1240

Xe+«

Xe+6 Xe 246 VC 5673 211

Xe+6 Xe 218 ± 1 NRE 5027 25

Xe+6 Xe 218 ± 1 NRE 5027 211

Xe+6 Xe 248 LE 5719 1240

18
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

APorIP

(eV) Method

Heat of

formation

(kcal moM)

Ref.

Xe+ 7

Xe+7 Xe 362 LE 8348 1240

Xe+ 8

Xe+S Xe 535 LE 12337 1240

Xe + 9

Xe+9 Xe 820 LE 18910 1240

Li + Heat of formation 163 kcal mol-1

Li+ Li 5.392 S 163* 2113

Li+ Li 5.5±0.3 LE 165 1112

Li+ (C2 H5 Li)4 14 ±2 NS 1 Li+ LiF F 11.5 VC 167 2179

Li+ LiCl Cl 10.6 VC 169 2179

Li+ LiBr Br 9.9 VC 167 2179

Li+ Lil I 9.5 ±0.3 VC 174 2001

Li+ Li2 I 2 ? Lil + 1? 11.6 ±0.3 VC 179 2001

LiH +

LiH+ LiH 7.81 TC 212 1093

LiH+ LiH 7.91 TC 215 1093

Be+ Heat of formation 293 kcal mol-1

Be+ Be 9.322 s 293* 2113

Be + Be 9.2 ±0.2 VC 290 2141

Be+ Be 9.3 ±0.2 VC 293 1106

Be+ BeF2 2F 28.3 ±1.0 VC 425 2142

Be+ BeCl2 2C1 26 VC 456 2195

B + Heat of formation 326 kcal mol 1

B+ B 8.298 s 326* 2113

B+ B 8.3 NS 326 1116

B+ b2 h6 bh3 +h+h2i? 19.5±0.2 SL 382 102

B+ b2 h6 bh3 +h+h2.? 18.7 ±0.1 VC 364 209

B+ b2 h6 bh3 +h + h2:? 18.9 ±0.2 VC 368 209

B+ b2 d6 BD3 + D + D2 ? 18.6 ±0.1 VC 362 209

B+ (CH3 )3 B 23.1 ±0.3 SL 364

B+ (C 2 h5 )3 b 30.1 ±0.5 SL 364

B+ (CH3 0)2 BH 23.4±0.5 SL 364

B+ (CH30)3 b 31. 6± 1.0 SL 364

B+ bf3 3F 30.6 ±1 EVD 377 440

B+ bf3 3F 30.1 ±0.5 SL 366 364

B+ bf3 3F 31.3 ± 0.4 VC 393 40

B+ BC1 Cl 13.6 ±0.2 LE 320 440

B+ bci3 3C1 22.35 ±0.06 EVD 332 440

B+ bci3 Cl2 + Cl 19.5 ±1.0 SL 324 364

B+ bci3 Cl2 + Cl 19.5±0.2 VC 324 206

B+ bci3 20.8 ±0.5 VC 206

B

+ bci3 18.4 ±0.2 LE 440

B+ BBr3 3Br 19.6 ±0.2 VC 323 206

B+ bi3 31 16.6 ±0.5 VC 323 206

19
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

b2 b+ b2 h6 2H2 + 2H? 26.3 ±0.5 SL 511 102

B+ b2 h« 3H2 21.1 ±0.1 VC 495 209

Bt b2 d6 3D2 21.8±0.2 VC 511 209

BH+ Heat of formation 333 kcal mol -l

BH+ BH 9.77 ±0.05 s 333* 1109

BH+ b2h6 16.6±0.2 SL 102

BH+ b2h6 2H2 + H 14.9±0.1 VC 300 209

BH+ (CH3 0)2 BH 28.3 ±2.0 SL 364

BD+

BB+ b2 d6 2D2 + D 14.8±0.1 VC 209

D3

BH+ bh2 9.8±0.2 SL 274 2030

BH+ b,h6 13.5 ±0.5 SL 102

BH+ b2 h6 13.4±0.1 VC 209

bd2 BD + b,d6 13.6±0.1 VC 209

BHJ Heat of formation 279 kcal mol -l

BH+ bh3 11.4±0.2 SL 287* 2030

BH+ b2 h6 bh3 ? 12.1 ±0.2 SL 264* 102

BHj b2 h6 bh3 ? 13.1 ±0.2 VC 287* 209

BDJ

BDJ b2 d6 bd3 ? 12.7 ±0.2 VC 209

b2 h+

B2 H+ b2 h6 2H2 + H 21.4±0.5 SL 450 102

b2 h+ b2 h« 2H2 + H 20.1 ±0.1 VC 420 209

b2 d+

b2 d+ b2 d6 2D2 + D 18.3±0.1 VC 209

b2 h2+ Heat of formation 329 kcal mol -l

b2 h+ b2 h6 2H2 13.8±0.2 SL 327* 102

b2 h+ b2 h6 2H2 13.8 ±0.1 VC 327* 209

b2 h+ B2 He 2H2 14.1 ±0.2 VC 334* 1024

b2 hd+

b2 hd+ b2 d5 h? 2D2 14.0±0.1 VC 209

b2 d2+

b2 d+ B.D6 2D2 14.0 ±0.1 VC 209

20
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

B2 H;[ Heat of formation 285 kcal mol -1

B2 H+ b2 h6 h2 + h 14.8 ±0.5 SL 298 102

B2 H3+ b2 h6 h2 + h 14.2 ±0.1 VC 284* 209

b2 h3+ b2 h6 h2 + h 14.3 ±0.2 VC 286* 1024

b2 hd.+

b2 hd+ b2 d5 h? D2 + D 14.2 ±j0.1 VC 209

B2 D;|

B2 D3+ b2 d6 D2 + D 14.3 ±0.1 VC 209

b2 d3+ b2 d6 D2 + D 14.5 ±0.2 VC 1024

B2 H| Heat of formation 293 kcal mol -1

b2h+ b2 h6 h2 12.4 ± 0.3 SL 294* 102

b2h+ b2 h6 h2 12.3±0.1 VC 292* 209

b2h4+ b2 h6 h2 12.3±0.2 VC 292* 1024

b2 hd+

b2 hd3+ b2 d5 h? D, 12.3±0.1 VC 209

b2 d4 b2 d+ b2 d6 d2 12.3 ±0.1 VC 209

b2d+ b2 d6 d2 12.3±0.2 VC 1024

B2 H^ Heat of formation 232 kcal mol -1

B2H+ b2 h6 H 12.0 ±0.3 SL 233* 102

B.H+ b2 h6 H 11.9±0.1 VC 231* 209

b2 h+ b2 h6 H 12.0 ± 0.1 VC 233* 1024

B2 HD|

b2 hd+ b2 d5 h? D 12 . 0 ± 0.1 VC 209

B2 D|

b2 d5+ b2 d6 D 12.0 ± 0.1 VC 1024

b2 d5+ b2 d6 D 12.1 ± 0.1 VC 209

B2 H£ Heat of formation 286 kcal mol -1

b«h+ b2 h6 12.1 ± 0.2 SL 288* 102

b2 h6+ b2 h6 1 1 .9 ± 0.

VC 283* 209

b2 dj

b2 d+ b2 d6 12 . 0 ± 0.1 VC 209

b3 h+

b3 h+ B4H10 16.5 ±0.8 VC 1119

21
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

b3 hj

b3 h2+ B4 Hio 17.8 ±0.8 VC 1119

B3H +

B3 HJ B4 H,o 14.2 ±0.3 VC 1119

B3 D+

B3 D3+ B4 Dio 13.8±0.3 VC 1119

b3 hj

B3H5+ B4 Hio 12.1 ±0.2 VC 1119

b3d5+

b3 d+5 B4 Dio 12.8±0.3 VC 1119

b4 h+ b4 h+ b5h9 19.97 ±1.0 SL 205

b4 h2 b4 h.j b5 h9 17.99 ±0.2 SL 205

b4 h+ b5 h9 17.59 ±0.2 VDF 205

b4 h+

B4 H+ b5 h9 15.96 ±0.5 SL 205

B4H3+ b5 h9 15.52 ±0.5 VDF 205

B4H+ B4 H,o 14.0±0.4 VC 1119

b4 d^

B4D+ B4 D,o 14.8±0.4 VC 1119

B4 Hj

b4 h+ b5 h9 14.06 ±0.1 SL 205

b4h+ B4 H,o 12.4±0.2 VC 1119

b4 d^

b4 d+ B4 D,o 12.5±0.2 VC 1119

b4 d+ B5D9 13.7±0.2 VC 1024

b4 d+ B5D11 12.4±0.5 VC 1024

B.Ht

B4H+ B4 H,o 12.5±0.3 VC 1119

B4H+ b5 h9 15.07±0.3 SL 205

b4h5+ b5h9 14.50 ±0.3 VDF 205

22
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

B4D5

B4 D+ B4 D10 12.5±0.2 VC 1119

B4 Hg Heat of formation 275 kcal mol - 1

B4 H+ B4 H10 2H2 11.2 ± 0.1 VC 274* 1119

b4 h6+ b5 h9 bh3 12.25 ±0.2 SL 276* 205

B4 D(t

B4 D+ B4 D10 2D2 11.1 ± 0.1 VC 1119

b4 d+ B5 D9 bd3 12.4±0.2 VC 1024

B4 D+ b5 d„ bd3 + D2 11.4 ±0.5 VC 1024

B4 Hf

B4 H+ B4 H10 h2 +h 12.5±0.2 VC 252 1119

b4 d7+

b4 d+ B4 D10 d2 + d 12.2 ± 0.1 VC 1119

b4 h8+

b4 h+ B4H10 h2 10.4 ±0.1 VC 256 1119

b4 d8+

b4 dj B4 D 10 d2 9.9±0.1 VC 1119

b4 h^

b4 h+ B4H10 H 12.2 ± 0.2 VC 245 1119

b4 d^

b4 d+ B4 D10 D 11.9 ±0.2 VC 1119

b5 h4+ b5h+ B5 H9 2H2 + H 13.01 ±0.3 SL 265 205

B5 H+ b5 h9 2H2 + H 13.20 ±0.3 VDF 270 205

B5 H+ b5 h„ 14.2 ±0.4 VC 1024

B5 H^ Heat of formation 311 kcal mol -1

b5 h5+ b5 h9 2H2 12.67 ±0.03 SL 310* 205

b5 h5+ b5 h9 2H2 12.8 ± 0.2 VC 313* 1024

b5 h5+ b5h„ 12.7 ±0.2 VC 1024

B«H+ BeHio 13.6 ± 0.2 VC 1024

b5d5+

b5 d5+ b5 d9 2D2 12.92 ±0.03 SL 205

BJ),+ b5 d9 2D2 12.4 ±0.4 VC 1024

b5d5+ b5d„ 3D2 12.3±0.2 VC 1024

23
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

b5 h6+

b5 h+ B3 H9 h2 +h 12.13 ±0.3 SL 245 205

B5 H+ B5 H9 h2 + h 12.48 ±0.3 VDF 253 205

B5 H+ b5 h„ 2H2 + H? 12.6 ±0.3 VC 263 1024

b5 d6+

b5 d+ B5 D9 D2 + D 12.4 ±0.2 VC 1024

b5 d+ B5D11 2D2 + D 12.2 ±0.3 VC 1024

B5 H| Heat of formation 283 kcal mol -1

b5h+ b5 h9 h2 11.43 ±0.1 SL 281* 205

Br,H + b,h9 h2 11 . 6 ± 0.2 VC 285* 1024

b5 h+ b5 h„ 2H2 11.5±0.2 VC 290* 1024

b5 h7+ B6 Hio bh3 12.0 ± 0.2 VC 275* 1024

B5 D|

b5 d+ b5 d9 d2 10.93 ±0.2 SL 205

b5 d+ b5 d9 d2 11 . 2 ± 0.2 VC 1024

b5 d+ b3 d9 d2 11.14±0.2 VDF 205

b5 d+ B5 D11 2 D2 11.1 ± 0.2 VC 1024

b5 h8+

B-.H+ b5 h9 H 10.50±0.1 SL 208 205

b5 h+ b5h„ 12.0±0.3 VC 1024

b5 h- B10 H16 11.6 ± 0.2 EVD 1102

b5 h+ B5 H*Br Br 12.0 ± 0.2 VC 1102

b5 h8+ b5h8i I 11.1 ± 0.1 EVD 1102

B5 D8+

B5 D+ B5 D 11 D2 + D 11.4 ± 0.3 VC 1024

B5 H^ Heat of formation 262 kcal mol -1

b5 h+ b5 h9 10.38 ±0.05 SL 257* 205

b5 h+ b5 h9 10.8 ±0.5 SL 267* 103

b5 h+ b5 h9 10.5±0.1 VC 260* 1024

b5 h+ b5 h„ h2 10.3 ±0.2 VC 262* 1024

b5 d^

b5 d+ b5 d9 9.77 ±0.1 SL 205

B5 D + B5 D!) 9.38±0.15 SL 205

B5 D + b5 d9 10. 0 ± 0.1 VC 1024

b5 d+ B5 D11 d2 10.4 ±0.2 VC 1024

b,h

b5 h0 B5 H11 H 11.8±0.4 VC 245 1024

24
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation .of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

B5 D+0 b5d+

0 B5 D11 D 11.3 ± 0.4 VC 232 1024

BbH4+

b6 h+ BeHio 13.4 ±0.3 VC 1024

It.H;

b6 h+ BbHio 12.0±0.3 VC 1024

b6 h6+

b6 h+ b6h10 11.9±0.1 VC 1024

B«H +

b6 h+ BkHio 11.5 ± 0.3 VC 1024

b«h8+

b6 h+ BbHio 11.2 ±0.1 VC 1024

B«H +

b6 h+ B«Hio H 11.1 ±0.4 VC 227 1024

BeH^o Heat of formation 237 kcal mol -1

b6 h+

0 BbHio 9.3±0.1 VC 237* 1024

BfiD^o

b6d+

0 BbDio 9.7 ±0.2 VC 1024

BioH^

B 10H+ B10 H14 4H2 13.56 ±0.3 SL 320 189

B10H+ B10 H14 4H2 13.14±0.3 VDF 311 189

Bi0 H|

B10H+ B10 H14 3H2 + H 12.51 ±0.5 VDF 244 189

b 10 ii 8 B10H+ B 10 H14 3H2 12.66 ±0.3 SL 299 189

B10 H+ B10 H14 3H2 12.67 ±0.3 VDF 300 189

BioH^0 BioH+

0 B10 H14 2H2 11.62 ± 0.2 SL 276 189

BioH^

B10H+ B10 H14 h2 +h 10.81 ±0.5 VDF 205 189

25
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-1

) B10H12 BioH|2 BioHh h2 10.90 ±0.2 SL 259 189

B10 H+ B10H14 h2 10.87 ±0.2 VDF 258 189

BioHj+4

Bi°H+

4 BioHh 11.0±0.5 SL 261 103

Bi°H+

4 Bi()Hi 4 10.26 ±0.5 VDF 244 189

BioH 16 BioH +

6 B10H16 10.1 ± 0.2 EVD 1102

C + Heat of formation 431 kcal mol- 1

C+ c 11.267 S 431* 2113 c+ c 11.3 ±0.2 NS 432 333. 1155 c+ CH.iCN 27.0±0.3 NS 131

c

+ CO 0- 20.89 ±0.09 RPD 431 2180

c

+ CO 0- 20.89 ±0.09 RPD 431 2191

c

+ CO 0- 21 . 0 ± 0.1 FDP 434 2014

C+ CO 0- 20.5 ±0.7 NS 422 2016

c

+ CO 0- 20.902 ±0.02 D 431 6

c

+ CO 0 22.57 ±0.20 RPD 435 2180

o CO 0 22.57 ±0.20 RPD 435 2191

c

+ CO 0 22.4±0.1 FDP 431 2014

c

+ CO 0 22 . 6 ± 0.6 NS 435 2016

c+ CH:i NO» 22.83 ±0.05 VC 90

c + cf4 31.5±0.5 SL 24

o CH3 C1 26.25 ±0.1 NS 131

c

+ CH,C1, 25.45 ±0.1 NS 131

c

+ CHCI3 24.62 ±0.05 NS 131

c

+ CF3 CI 31 ±1 SL 24 c+ CBr4 4Br? 23.1 ±0.4 EVD 445 1246 c+ CBr4 4Br? 25.3±0.5 EVD 1246 c+ CBr4 4Br? 27.1 ±0.5 EVD 1246

C+ CH,Br, 24.52 ±0.05 NS 131

c

+ CHBri 23.55 ±0.05 NS 131

c

+ CF3 Br 33 ±1 SL 24

o CF3 I 32.6 ±1 SL 24

C+ CO 0- 20.8 ±0.5 PI 429 163 c+ CO 0 22.3 ±0.4 PI 428 163 c+ CO 0 24.8±0.5 PI 163 c+ CO 0 26.4 ± 0.3 PI 163

Heat of formation 475 kcal mol- 1 Q c2 13 VC 499 2102

Ci c2 12.0 ± 0.6 NS 476* 333, 1155

r+2 c2 h2 H- 18.2 VC 474* 2102

c + c2 h2 2H 22.7 VC 474* 2102 r + ^ 2 c2 h2 2H 23.3 ±0.5 VC 487 13

CJ c2 n2 n2 18.4 ± 0.3 SL 498 154

CJ CNC=CCN c2 n2 18.5 ± 0.3 SL 481 154

ct CNC=CC=CCN C4 N2 18.4 ±1.0 SL 479 154

ct CH^CCN HCN 18.6 ± 0.2 SL 488 154

26
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of

Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

Heat of formation 480 kcal mol 1

Cj c3 14.4 + 0.3 SL 521 154 c 3+ c3 13.6 SL 503 154 r + ^ 3 c3 14.0 SL 513 154 r + ^ 3 c3 12.6 + 0.6 NS 480* 333. 1155 c+ CH.t C=CH H/2H? 26.0+1 VC 540 13

c+ CNC^CCN CN+ N? 24.6 + 0.5 SL 482 154

c+ CNC=CC=CCN C3 N+ N? 23.0 + 2.0 SL 474 154

C 3+ CH=CCN N+ H? 24.5 + 0.5 SL 491 154

c4+ C 4+ c4 12.6 NS 533 333, 1155

Q CNOCCN n2 17.2 + 0.2 SL 525 154

Q CNC=CC=CCN c2 n2 17.8 + 0.4 SL 520 154

c5+ c5+ c5 12.7 + 0.5 SL 535 154 c5+ Cs 12.5 + 1 NS 531 333, 1155

C5+ CNC=CC=CCN CN + N 24.0 + 0.5 SL 523 154

c +

c+ c6 12.5 + 0.3 SL 154

CH+ Heat of formation 399 kcal mol t CH+ CH 11.13 + 0.22 S 399* 2114

CH+ CH3 H, 15.58 + 0.30 LE 393 414

CH+ C2 H2 CH 21.68 VC 412 2102

CH+ c3 h« 26.0+1 VC 1408

CH+ c3 h8 31.8+1.5 VC 1408

CH+ ch3 cn HCN + H? 22.4 + 0.2 NS 453 131

CH+ CH=CCN C-»N? 21.9 + 0.3 SL 485 154

CH+ CH3 0H h2 o + h? 22.31 + 0.09 NS 472 131

CH+ c,h4 o 22.8 + 0.4 EVD 50

(Ethylene oxide)

CH+ CH3 C1 h2 + Cl? 22.5 + 0.06 NS 470 131

CH+ ch,ci2 C1+HC1? 21.72 + 0.04 NS 472 131

CH+ chci3 3C1? 23.9 + 0.3 EVD 438 43

CH+ chci3 3C1? 22.90 + 0.04 NS 416 131

CH+ CH3 Br H,+ Br? 21.41+0.05 NS 459 131

CH+ CH,Br, H + 2Br? 21.55 + 0.05 NS 390 131

CH+ CHBr3 3Br? 21.70 + 0.05 NS 424 131

CH+ CH.J h2 +i? 21.2 + 0.2 NS 466 131

27
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

CH2+ Heat of formation 333 kcal mol 1 CH+ CR, 10.396 + 0.003 S (a) 1078

CH+ cm 11.82 + 0.05 VC (a) 327

CRl cm 10.7 + 0.5 NS (a) 87

(El on neutral fragment from C3 Hk)

cm cm 11.0 + 0.5 NS (a) 87

(EI on neutral fragment from /2-C4H10)

CRT cm H 15.29 + 0.08 VC 334* 414

cm cm H 15.41 + 0.15 LE 337 414

CH+ cm m 15.16 + 0.04 PI 332* 1128

CH+ cm h2 15.6 + 0.2 RPD 342 160

CH + cm m 16.3 + 0.2 RPD 160

ch2+ cm h2 16.8 + 0.2 RPD 160

CRT cm h2 17.7 + 0.2 RPD 160

CH+ cm H + H? 19.4 RPD 344 160

CH+ cm 2H 20.0 RPD 339 160

CH.T c2 m 21 VC 2136

CRT c2 m CR, 19.0 VC 357 419

CRT ch2 n2 n2 12.3 + 0.1 VC (a) 314

(Diazomethane)

CRT ch2 n2 n2 11.0 + 0.1 VC (a) 314

(Diazirine)

CRT mmo CHO + H? 16.5 + 0.4 EVD 320 50

(Ethylene oxide)

CRT mmo c2 mo +

18.8 + 0.5 EVD 364 50

(Propylene oxide)

CRT c4 mo2 21.3 + 0.5 EVD 153

(l,2-Epoxy-3-methoxypropane)

CRT ch2 =cf. cf2 17.8 VC 367 419

CH+ CH3 CF.i hcf3 16.2 + 0.3 SL 362 1075

CH+ CH3 BF2 HBF, 16.9 + 0.1 VC (b) 1076

CRT c2 ms CS + 2H 20.4 + 0.5 EVD (b) 51

(Ethylene sulfide)

CRT cmci HC1 14.6 + 0.2 RPD 339 160

CH2+ cr3 ci HC1 15.3 + 0.2 RPD 160

CRT cmci HC1 15.9 + 0.2 RPD 160

CRT cr3 ci HC1 16.8 + 0.2 RPD 160

CRT ch3 ci H + Cl-

? 15.3 + 0.2 RPD 340 160

CH+ cmci C1 + H-? 18.4 + 0.2 RPD 343 160

CH2+ cmci mci 19.1+0.2 RPD 340 160

cm c3 moci 21.6 + 0.5 EVD 153

(Epichlorohydrin)

CHT CH3 Br HBr 14.9 + 0.2 RPD 344 16C CH+ CH3 Br HBr 15.6 + 0.2 RPD 160

ch2+ CH3 Br HBr 16.1 + 0.2 RPD 160

CH.T CH3 Br HBr 17.0 + 0.2 RPD 160

cm CH3 Br H + Br-

? 15.15 + 0.2 RPD 345 160

CH+ CH3 Br Br + H

-

? 18.1+0.2 RPD 349 160

CH+ CH3 Br H + Br 18.7 RPD 344 160

cm C3 H5 OBr 21.4 + 0.5 EVD 153

(Epibromohydrin)

28
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

CH+ CHsI HI 14.6 ±0.2 RPD 333 160

CH+ ch3 i HI 15.3 ±0.2 RPD 160

CH+ ch3 i HI 15.9±0.2 RPD 160

CH+ ch3 i HI 16.7 ±0.2 RPD 160

CH+ ch3 i H + I-? 14.6 ±0.2 RPD 335 160

CH+ ch3i I + H-? 17.0±0.2 RPD 336 160

CH+ ch3 i I+H-? 18.1 RPD 160

CH+ ch3i H + I 17.7±0.2 RPD 334 160

CDt

CD+ cd4 d2 15.25 ±0.04 PI 1128

CHg Heat of formation 260 kcal mol-1

CH+ OR 9.840 ±0.002 S 260* 349

CH+ ch3 9.82 ±0.04 PI 260* 1068

CH+ ch3 9.80 ±0.1 RPD 259 2158

CH+ ch3 10.3±0.1 RPD 2158

CHJ CH3 10.7 ±0.1 RPD 2158

CH+ CIR 1 1 .4 ± 0.

RPD 2158

CH+ ch3 9.86 ±0.02 VC 261 327

CH+ cn. 10.11 ±0.10 VC 266 414

CH+ cm 10.04±0.12 LE 265 414

CHt ch3 9.8±0.1 NS 259 87, 1129

(El on neutral fragment from C3 H«)

CH+ ch3 9.8 ±0.1 NS 259 87

(El on neutral fragment from benzene)

CHi ch3 10.0±0.1 NS 264 87

(El on neutral fragment from n-C4 H)0 ) cm cm 10.0 ± 0.2 NS 264 87

(EI on neutral fragment from n-CeH^)

cm cm 10.0±0.3 NS 264 464

CH+ cm H 14.25 ±0.02 PI 259* 1128

cm cm H 14.23 ±0.05 PI 258* 2013

CHJ cm H 14.3 ±0.05 RPD 260 224

CH+ cm H 14.75±0.1 RPD 224

CH+ cm H 15.3 ±0.1 RPD 224

cm cm H 14.3 ±0.05 RPD 260 2154

cm cm H 14.28 ±0.08 RPD 259 1072

cm cm H 20.85 ±0.27 RPD 1072

cm cm H 14.3±0.1 MSD 260 1451

CHJ cm H? 13.7 ±0.05 RPD 265 2154

HCJ cm H? 14.7 ±0.05 RPD 2154

CHJ cm H-? 15.4±0.05 RPD 2154

CH+ cm H ? 16.4±0.05 RPD 2154

CH+ c2 m cm 13.6 RPD 260 160

CHJ c,m cm? 12.6 RPD 160

CH + c2 m cm? 13.6 RPD 160

CH+ c2 m cm? 14.3 RPD 160

CHJ c2 h(; cm? 15.3 RPD 160

CH+ c2 m cm? 16.0 RPD 160

CH+ cmc=CH c2 h 15.4 ± 0.5 VC (b) 13

29

323-656 O 69—3
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

CH + C,H„ C2 H5 15.2 ± 1 VC 301 1408

CH+ C,H8 c2 a 20.2 ±0.5 VC 1408

CH + C3 H* c,h5 14.0±0.5 LE 273 2021

CH + C:( Hk c2 h3 17.5 ± 0.5 LE 2021

CH+ C;( Hh C2 H5 20.0 ±0.5 LE 2021

CHJ C.Hk c2h+ 22.0 ± 0.5 VC 263 1408

cat C;j Hh c2 h+ 22.4 ± 0.5 LE 273 2021

CH + GsHh H2 +C2 H+ 25.0 ± 0.5 VC 269 1408

CH + CH,CH=C=CH- C3 H,( 14.4 ±0.2 SL (b) 462

cut CH3 C=CCH3 C3 Hi 17.6 ± 0.5 VC (b) 13

cut neo-C.-,Hi 2 tert- CjHh 13.14 VC 259 2101

cut neo-C5 H12 20.07 VC 2101

CH+ C2 H5 OCOCH 18.50 EVD 1197

CH+ CH3 C=CC = CCH3 25.70 EVD 1197

cut (CH3 )3 B (CH3 )2 B 15.1 ±0.3 SL (b) 364

cut C2 H5 N HCN+H 15.5 ±0.3 EVD 299 51

(Ethylenimine)

CH + (CH2 );i NH C2 H3 N+H 14.4 ±1.0 EVD 275 52

(Azetidine)

cut CH3 N2 H3 N2 H1 14.1 ±0.3 SL (b) 424

cut CH3 N=NCH3 ch+n2 11.5 ±0.1 SL 275 304

CH + (CH3 ) 2 N2 H2 ch3 nnh> 14.5 ±0.3 SL (b) 424

(1,1-Dimethylhydrazine)

cut (CH3 >2 N2 H2 ch3 nhnh 13.9±0.3 SL (b) 424

(1,2-Dimethylhydrazine)

CH + (CH3 hN2 H (CH3 )2 N2 H 14.0 ± 0.5 SL (b) 424

CUj (CHf )4N2 (CILls N2 14 ± 1 SL (b) 424

cut ch3 n3 n2 + n? 14.1 ±0.1 SL 269 340

cut ClijOH OH 13.7 RPD 259 2018

cut CHiOH OH 14.7 RPD 2018

CH+ CH3 OH OH 15.3 RPD 2018

cut CHiOH OH 13.5 NS 254 46

cut CH3 OH OH ? 11.9 RPD 2018

cut CH,iOH OH? 13.0 RPD 2018

cut CH3 OH OH? 13.7 RPD 2018

cut CHiOH OH? 14.7 RPD 2018

cut CH3 OH OH? 15.3 RPD 2018

cut ch3 cho CHO 13.12 ± 0.06 EVD 267 127

cut ClfiCHO CO + H 14.55 SL 270 298

cut C2 H4 O CO+H 14.3±0.2 EVD 292 50

(Ethylene oxide)

cut (CH3 )>0 CH3 O 13.1 RPD (b) 2018

cut (CHihO CH3 O-? 10.5 RPD 2018

cut (CH3 )2 0 ch3 o-? 11.6 RPD 2018

CH + (CH3 >2 CO CO+CH3 ? 15.20 SL 292 298

cut (CEEhCO CH3 CO 13.15±0.17 VC 256 2174

cut c3 h«o ch3 co? 13.9±0.2 EVD 303 50

(Propylene oxide)

cut CH3 COC2 H5 CO + C2 H5 15.20 SL 294 298

cut ch3 cooh COOH 16.08 LE 306 171

CH + C3 H«02 16.0 ± 0.3 EVD 153

( 1 ,2-Epoxy-3-methoxypropane)

30
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

(CH:i O),BH 13.4±0.5 SL 364

CH+ (CH.,0)3B 21.4± 0.5 EVD 115

CH+ (CHiO^B 13.6 + 0.5 SL 364

CH+ CH;s COCHN2 cochn2 13.2 + 0.06 LE 2174

CH+ CH:i NO. no2 12.6 RPD 265 2018

CHJ CHjN02 N07 ? 8.7’ RPD 2018

cut CH.3 N02 NQr ? 9.8 RPD 2018

cut ch3 no2 NQ-? 10.4 RPD 2018

cut CH3 NO2 NQr? 11.5 RPD 2018

cut CH3 NO, nq2 ? 12.1 RPD 2018

cut c2 h5 ono2 ch2 ono2 13.75 + 0.50 VC (b) 1013

CH+ CH3 F F 14.5 + 0.05 RPD 249 2154

CH + CH3 F F 14.7 + 0.3 SL 253 1136

CH+ CH.;F F 16.3 + 0.3 SL 1136

cut ch3f F 16.5 ± 0.5 SL 1136

cut ch3 f F"? 10.8 + 0.05 RPD 247 2154

cut CH3 F F? 11.9 + 0.05 RPD 2154

CH+ CH3 F F? 12.6 ± 0.05 RPD 2154

cut CH3F F-? 13.4 + 0.05 RPD 2154

cut CH3 F F- 12.7 + 0.5 SL 291 1136

cut CHiCHF, chf2 18.6 VC (b) 1288

cut CH3 CF3 cf3 15.0±0.1 SL 284 1075

cut CH:iBF2 bf2 14.8 ±0.1 VC 278 1076

cut CH3 COCF3 co+cf3 14.60 SL (a) 298

cut CH3 SiH3 SiH3 15.1 ±0.3 SL 2182

CHJ (CH3 )3 SiH (CH3 )2 SiH 14.8 ±0.5 EVD (b) 83

CH+ ch3 ph2 ph2 14.8±0.2 EVD 304 2045

cut (CU3 hP (CH3 >2 P+ 21.7±0.5 VC 263 1036

CH.+

3 (CUzhS ch2 + sh 17.0±0.4 EVD 84

CH+ (CU3 }zS ch3 s 13.0 SL (b) 307

CH+ CH3 SCD3 cd3 s 13.1 SL 307

cut CsHeS 18.1 ±0.4 EVD 188

(Propylene sulfide)

CH+ C2 H5 SCH3 17.6 ±0.5 EVD 176

CH+ ch3 sch2 ch=ch2 17.7 ±0.5 EVD 186

CH;+ n-C3 H7 SCH3 16.6 ±0.5 EVD 176

cut wo-C3 H7 SCH3 19.4 ±0.5 EVD 186

cut ch3 ssch3 15.7 ±0.3 EVD 176

cut ch3 ncs NCS 15.3 ±0.3 EVD (b) 315

cut c2 h5 ncs 19.6 ±0.5 EVD 315

cut ch3 ci Cl 13.6 ±0.05 RPD 265 2154

CH+ ch3 ci Cl 13.4±0.1 SL 261 364

cm ch3 ci Cl 13.6±0.1 SL 265 364

cut ch3 ci Cl 13.7 ±0.2 SL 267 1136

31
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

CH+ CH3 C1 ci- 10.07 PI 272 1399

ch3+ CH3CI ci-? 9.8 ±0.05 RPD 265 2154

ch3+ CH3CI ci-? 10.8 ±0.05 RPD 2154

CH+ CH3CI ci-? 11.5±0.05 RPD 2154

CHj CH3CI ci-? 12.4 ±0.05 RPD 2154

CHj CH3CI Ch? 13.2 ±0.05 RPD 2154

CHJ CH3CI ci- 10.2±0.5 SL 275 1136

CH- CH3CI ci- 11.1 ±0.1 FDP 295 1378

CH+ C2 H5 C1 CH2 C1 ? 15.9 ±0.3 VC (b) 356

ch3+ ch3 coch2 ci co+ch2 ci 13.9±0.2 VC (b) 2174

CH- C3H50C1 co+ch2 ci? 14.6±0.5 EVD (b) 153

(Epichlorohydrin)

CHJ CH3 SiCl3 SiCla 15.0±0.2 SL (b) 2182

CH* (CH3 )4 Ge Ge + 3CH3 20.1 ±0.5 EVD 239 83

ch3+ CH3 Br Br 13.0±0.05 RPD 265 2154

chj CH3 Br Br 12.9±0.1 SL 262 1136

CHJ CH3 Br Br-? 10.7 ±0.05 RPD 2154

CHj CH3 Br Br"? 11.4±0.05 RPD 2154

CH$ CH3 Br Br-? 12.3 ±0.05 RPD 2154

CHj CH3 Br Br-? 13.0±0.05 RPD 2154

CHi C2 H5 Br CH2 Br 16.9 ±0.3 VC (b) 356

cut C3 H5 OBr C0 + CH2 Br? 15.6±0.5 EVD (b) 153

(Epibromohydrin)

CHj CH3 I I(2 F

>3 / 2 ) 12.2±0.05 RPD 259 2154

CH- CH3I I(2 Pi/2 ) 13.1 ±0.05 RPD 258 2154

CH+ CH3 I 1 12.4±0.2 SL 264 1136

CH| CH3 I I-? 9.1 ±0.05 RPD 260 2154

CHJ CH3I I-? 10.1 ±0.05 RPD 2154

cut CH3I I-? 10.8 ±0.05 RPD 2154

CH+ CH3 I I-? 11.8±0.05 RPD 2154

cm CH3I I-? 12.6±0.05 RPD 2154

cm c2 h5 i ch2 i 16.3 ±0.3 VC (b) 356

cm (CH3 >2 Hg CH3 Hg 13.4±0.1 SL (b) 306

cm CH3 HgCl HgCl 14.8 ±0.2 SL (b) 306

CH^ High kinetic energy ions

cm c2 h6 30.3 ±0.2 NRE 1264

cm c3 h8 C2 H5+ 27.8±0.2 NRE 1451

cm c3 h8 30.8±0.2 NRE 1264

cm c3 h8 c2 h5+ 34.5 ±0.5 NRE 1451

CH+ n-C4 Hio 29.7 ±0.2 NRE 1264

CH+ i5o-C4 H10 29.4 ±0.2 NRE 1264

CH+ neo- C5 Hi2 29.5 ±0.2 NRE 1264

CH+ c6 h« 28.2 ±0.2 NRE 1264

(Benzene)

CH + n-CrHu; 27.9±0.2 NRE 1264

CH+ 150-C3H7OH 30.2 ±0.2 NRE 1264

ch3+ iso-c3 mc\ 29.7 ±0.2 NRE 1264

32
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

CDJ

CD+ cd3 9.832 ±0.002 S 349

CD+ cd4 D 14.38 ±0.03 PI 1128

CD+ cd3 cooh COOH 15.56 LE 171

CH| Heat of formation 274 kcal mol- 1

CHJ CH4 12.704 ±0.008 PI 275* 1253

CHJ CH4 12.99 ±0.01 PI 282 416

CHJ CHi 12.71 ±0.02 PI 275* 1128

CHJ CH, 12.98 ±0.02 PI 282 182

CHJ CH4 12.55 ±0.05 PI 272* 2013

CHJ CH4 13.1 ±0.1 PI 284 331

CHJ ch4 12.8 ± 0.2 PI 278 230

CHj CH, 12.9±0.4 S 280 138

CHj ch4 12.99 PE 282 1130

CHJ ch4 13.00 ±0.02 RPD 282 224

CHj CHi 13.6±0.1 RPD 224

CHJ ch4 14.2 ±0.1 RPD 224

CHJ ch4 14.7 ±0.1 RPD 224

CHJ ch4 13.16±0.02 RPD 286 289

CHJ CH, 13.18±0.02 RPD 286 1072

CHJ ch4 13.1 VC 284 2136

CHJ ch4 13.21 ±0.1 NS 287 1129

(El on neutral fragment from C3 H«)

CHj ch4 13.04 TC 283 1352, 2020

CHJ ch4 13.25 TC 288 136

CHj ch4 14.06 TC 306 1006

CHJ ch4 19.42 ±0.08 RPD 430 289

CHJ ch4 19.35 ±0.40 RPD 428 1072

CHJ ch4 19.30 TC 427 1352, 2020

CHJ C2 H40 CO 12.3 ±0.2 EVD 297 50

(Ethylene oxide)

CDj

CDj cd4 12.882 ±0.008 PI 1253

CDj cd4 12.87 ±0.02 PI 1128

CDJ cd4 13.1 VC 2136

C2 H+ Heat of formation 399 kcal mol -1

C2 H+ c2 h2 H 17.22 PI 399* 1400

c2 h+ c2 h2 H 17.3 VC 401 2102

c2 h+ c2 h2 H 17.3 VC 401 2136

c2 h+ c2 h2 H 17.8±0.5 VC 413 13

c2 h+ c2 h2 H 17.4 MSD 403 1451

c2 h+ c2 h2 H 17.56 ±0.1 NS 407 1129

(El on neutral fragment from C3 H8 )

33
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1 Ref.

) C2 H+ CHaC^CH ch3 17.2 ±0.5 VC 408 13

c2 h+ C3 Ha 2H2 + CH3+ 30.4 ±0.5 VC 417 1408

c2 h+ CH^CC^CH c2 h 20.1 ±0.5 VC 454 13

c2 h+ CH=CCN CN 19.0±0.2 SL 429 154

c2 h+ C2 H40 2H + 0H 24.0 ±0.3 EVD 427 50

(Ethylene oxide)

C2 H+ CH3 COC=CH ch3 +co? 17.95 SL 418 298

c2 h+ c2 h5 ssc2 h5 11.35 SL 307

c2 d+

c2 d+ c2 d2 D 17.34 PI 1400

C2 Ut Heat of formation 317 kcal mol -l

G>H+ c2 h2 11.396 ±0.003 PI 317* 1253

C2 HJ c2 h2 11. 400 ±0.005 PI 317* 2013

c2 h+ c2 h2 11. 406 ±0.006 PI 317* 54, 1019,

1118,1400

c2 h+ c2 h2 11.41 ±0.01 PI 317* 182, 162,

416, 1022

c2 h+ c2 h2 11. 25 ±0.05 PI 314 156

c2 h+ c2 h2 11.36 PE 316 1108

c2 h+ pnu ) c2 h2 16.27 PE 429 1108

C2 H£ (%-) c2 h2 18.33 PE 477 1108

C,H+ c2 h2 11.41 PE 317* 1130

C.Hj c2 h2 16.41 PE 1130

c2 h+ c2 h2 18.56 PE 1130

c2 h+ c2 h2 20.51 PE 1130

c2 h+ c2 h. 11.40 ±0.02 RPD 317 224

c2 h+ c2 h2 11.7 ±0.1 RPD 224

C2 H.7 c2 h2 12.1 ±0.1 RPD 224

C,H.+ c2 h2 13.2 ±0.1 RPD 224

c2 h+ c2 h2 14.5±0.1 RPD 224

c2 h+ c2 h. 1 7.0 ± 0.

RPD 224

c2 h+ c2 h2 11.50±0.10 RPD 319 166

c2 h+ c2 h2 13.25±0.19 RPD 166

c2 h+ c2 h2 16.95 ±0.30 RPD 166

c2 h+ c2 h2 11.41 ±0.01 VC 317 13

c2 h+ C,H, 11.36 TC 316 136

c2 h+ c2 h. h2 12.96 ±0.02 PI 311 2013

c2 h+ c2 h4 h2 13.40 ±0.08 RPD 321 166

c2 h+ c2 h4 h2 15.00±0.08 RPD 166

c2 h+ c2 h4 h2 13.2 ±0.1 VC 317 419

c2 h2+ c.h4 2H 17.55±0.20 RPD 313 166

c2 h.+ c2 h4 2H 21.41 ± 0.31 RPD 166

c,h2+ c,h4 2H 25.20± 1.0 RPD 166

c2 h2+ C3 Hs ch4 +h2 14.1 ±0.15 VC 318 1408

c,h2+ C3 Hh 21.8 ± 1 VC 1408

c2 h2+ C3 Hh h2 + h + ch3+ 28.5 ±1 VC 321 1408

c2 h2+ ChH6 2C2 H2 18.6±0.3 EVD 340 1238

(Benzene)

C,H+ C„H« 32.6±0.2 SRP 1264

(Benzene-excess KE ion)

34
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c2 h2+ c2 h5 n NH + H> 16.4 + 0.4 EVD 325 51

(Ethlyenimine)

C2 H2+ C2 H;i CN HCN 13.13 + 0.10 EVD 315 1406

c2 h+ (CH2 )3 NH ch3 +nh2 16.6 ± 0.5 EVD 324 52

(Azetidine)

C.H+ (CH2 ) 4 NH c2 h5 +nh2 ? 17.3 ±1.0 EVD 331 52

(Pyrrolidine)

c2 h+ c4 h4 n2 14.94 + 0.10 EVD 1406

(Orthodiazine)

c2 h+ c4 h4 n2 15.79 ±0.05 EVD 1406

(Metadiazine)

c2 h+ c4 h4 n2 15.23 + 0.10 EVD 1406

(Paradiazine)

c2 h2+ c2 h4 o h2 o? 15.7 ±0.3 EVD 407 50

(Ethyleiae oxide)

c2 h+ CsHhO ch2 o + h2 13.9 ± 0.2 EVD 327 50

(Propylene oxide)

c2 h2+ (CH2 )3 o CO + 2H2 15.2±0.2 EVD 353 52

(Trimethylene oxide)

c2 h+ C4 Hk O 13.8±0.3 EVD 153

(3,4-Epoxy-l-butene)

c2 h+ (CH2 )4 0 17.3 ± 0.3 EVD 52

(Tetrahydrofuran)

c2 h+ c4 h8 o2 16.2±0.3 EVD 153

(l,2-Epoxy-3-methoxypropane)

c2 h2+ c2 h:) f HF 13.73 ±0.1 VC 353 419

C,H+ ch2 =cf2 2F 19.78±0.1 VC 340 419

c2 h2+ c2 h3cf3 hcf3 13.3±0.15 SL (a) 1075

c2 h2+ c2 h3 bf2 hbf2 13.75±0.1 VC (b) 1076

c2 h4 s SH + H 17.9±0.5 EVD 346 51

(Ethylene sulfide)

c2 h2+ c3 h6 s 17.7 ± 0.4 EVD 188

(Propylene sulfide)

c2 h2+ (CH2 )3 S 17.1 ± 0.4 EVD 52

(Trimethylene sulfide)

c2 h2+ c2 h5 sch3 17.8±0.5 EVD 176

c2 h+ c2 h5 ssc2 h5 19.5 ±0.5 EVD 186

c2 h2+ c2 h5 ncs 18.1 ± 0.2 EVD 315

c2 h+ c3 h5 oci 16.6 ±0.1 153

(Epichlorohydrin)

c2 h+ C3 H5 OBr 16.7 ± 0.6 EVD 153

(Epibromohydrin)

c2 d^

c2 d^ c2 d2 11.416 ±0.006> PI 54, 1019,

1118, 1400

35
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

C2 H$ Heat of formation 269 kcal mol-1

C2 H+ C2 H;j 9.45 ±0.05 SL 283 70

C,H.| c2 h3 9.35±0.15 NS 281 1129

(El on neutral fragment from rc-C6 Hi4 ) C2 H.+ c2 h3 9.4 ± 0.2 NS 282 87

(El on neutral fragment from ra-C6 Hi4 ) C2 H;t c2 h3 9.9±0.5 NS 293 87

(El on neutral fragment from C3 H8 ) c2 h3+ c2 h4 H 13.37 ±0.03 PI 269* 2013

c2 h+ c2 h4 H 14.10±0.15 RPD 286 166

c2 h+ c>h4 H 15.58±0.15 RPD 166

C.H.+ c2 h4 H 17.35 ± 0.28 RPD 166

c2 h+ c2 h4 H 18.53 ±0.28 RPD 166

c2 h+ c2 h4 H(2s?) 24.35 ±0.55 RPD 287 166

c2 h+ c2 h4 H 14.00 ±0.05 EVD 283 70

c2 h+ c2 h4 H 14.06 VC 285 419

c2 h+ c3 h« ch3 13.80 LE 290 194

c2h3+ c3 h8 ch3 +h2 14.5±0.15 VC 276 1408

c2 h+ C3 Hh CH3 + 2H 19.5 ±0.3 VC 287 1408

c2 h3+ C3 Hh h2 +ch+ 25.0 ±0.5 VC 293 1408

c2 h± c3 h8 30.8 ±0.2 SRP 1264

(Excess KE ion)

c2 h3+ ch2 =chch=ch2 C2 H2 + H 15.72 ±0.08 SL 283 462

c2 hj ch3 c=cch3 C2 H3 14.7 ±0.2 VC 309 13

C,HJ 1-C 4 Hh c2 h5 13.6 LE 289 194

c2 h3+ neo-C5 Hi2 3CH3 17.95 VC 275 2101

C2 H3+ C6 H(i 31.1 ±0.2 SRP 1264

(Benzene-excess KE ion)

C2 Ht c2 h5 n NH + H 16.9 ±0.3 EVD 285 51

(Ethylenimine)

c2 h+ (CH2 )3 NH ch2 + nh2 ? 16.6±0.5 EVD 264 52

(Azetidine)

C2 H3+ (CH2 )4 NH c2 h5 + nh? 16.7 ±0.3 EVD 279 52

(Pyrrolidine)

c2 h± c2 h4 o OH 14.3 ±0.2 EVD 308 50

(Ethylene oxide)

C2 H3+ c2 h5 oh H2 0 + H 14.7 NS 288 46

c2 hj ch2 =chcho CHO? 13.69±0.13 NS 297 130

c2 h3+ c3 h«o ch2 o+h 14.3 ±0.1 EVD 284 50

(Propylene oxide)

c2 hj (CH2 )3 0 CH2 0 + H 14.9±0.3 EVD 296 52

(Trimethylene oxide)

c2 h3+ n-C3 H7 OH ch4 +oh 14.7 NS 286 46

C.HJ i 5o-C3 H7 OH ch4 + oh 14.6 NS 280 46

c2 h+ CH3 COCH=CH2 ch3 +co 13.75 SL 284 298

c2 h3+ c4 h6 o ch3 co 12.6 ±0.3 EVD 305 153

(3,4-epoxy-l-butene)

c2h+ (CH2 )4 0 16.1 ±0.3 EVD 52

(Tetrahydrofuran)

C2 HJ c4 h8 o2 16.3±0.2 EVD 153

( 1 ,2-Epoxy-3-methoxypropane)

36
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c2h3+ c2 h3f F 14.38 ±0.1 VC 285 419

c2 h3+ c2 h3 cf3 cf3 14.20 ±0.05 EVD 287 1075

C2Uf c2 h5 cf3 cf3 +h2 15.3 ±0.1 SL 276 1075

C2 H+ c2 h3 bf2 bf2 14.25 ±0.05 VC (a) 1076

c2 h3+ i50-C3 H7 BF2 ch4 +bf2 14.8±0.1 VC 271 1076

c2 h3+ (CH3 )3 SiH 15.3 ±0.5 EVD 83

c2 h3+ c2 h4 s SH 14.6±0.2 EVD 322 51

(Ethylene sulfide)

c2h3+ (CH3)2 S H2 S + H 15.4±0.3 EVD 299 84 c2 h> (CH3 )2 S hs + h2 14.7 SL 299 307

c2 h+ ch3 scd3 D2 S + D 16.7 SL 307

c2h3+ c3 h«s ch2 s + h 17.2±0.3 EVD 188

(Propylene sulfide)

c2h3+ (CH2 )3 S CHS + H2 16.7 ±0.2 EVD (b) 52

(Trimethylene sulfide) c2 h3+ c2h5sch3 CH3 S + H, 16.0±0.4 EVD 322 176 c2h3+ ch3 sch2 ch=ch2 ch3 s + ch2 16.5 ±0.4 EVD 265 186

c2h+ (CH2 )4 S 18.0±0.4 EVD 52

(Tetrahydrothiophene)

c2 h+ n-C3 H7 SCH3 15.8±0.4 EVD 176

c2 h3+ iso-C3 H7 SCH3 16.5±0.5 EVD 186

c2h+ (C2 H5 )2 S 16.7±0.5 EVD 84

c2h3+ c2 h5 ssc2 h5 17.2 ±0.4 EVD 186

c2h3+ c2 h3ncs ncs + h2 15.6 ±0.3 LE (b) 315

c2h3+ c3 h5 oci ch2 o + ci 14.0±0.4 EVD 295 153

(Epichlorohydrin)

c2a+ C3 H5 OBr CH2 0 + Br 14.4 ±0.2 EVD 305 153

(Epibromohydrin)

c2 h2 d+

C2 H2 D+ ch3scd3 h2 s + h? 15.05 SL 307

c2 hd+

c2hd2+ ch3 scd3 13.5 SL 307

c2 d+

c2d^ ch3 scd3 12.1 SL 307

c2 h+ Heat of formation 253 kcal mol-1

c2 h+ c2 h4 10.45 S 253* 2059 c2 h+ c2 h4 10.507 ±0.004 PI 255 1253

c2 h+ c2 h4 10.511 ±0.005 PI 255 2013

c2 h+ c2 h4 10.515 ± 0.01 PI 255 182, 416

c2 h+ c2 h4 10.45 ±0.02 PI 253* 2059

c2h+ c2 h4 10.50 ±0.02 PI 255 268

c2 h+ c2 h4 10.46 ±0.05 PI 254 156

c2 h4+ c2 h4 10.48 PE 254* 1130 c2 h+ c2 h4 12.50 PE 1130 c2 h+ c2 h4 14.39 PE 1130

c2 H| c2 h4 15.63 PE 1130

C2 H| c2 h4 19.13 PE 1130

37
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol* 1

)

Ref.

c,h4+ c2 h4 10.5 ± 0.25 EM 255 2187

c2 h+ c2h4 10.48±0.13 RPD 254 166

c2 h4+ c2 h4 11.74±0.17 RPD 166

C,H+ c2 h4 13.31 ±0.20 RPD 166

c2 h+ c2 h4 14.64 ± 0.58 RPD 166

c2 h+ c2 h4 19.28 ±0.30 RPD 166

c2 h4+ c2 h4 10.56 ±0.05 EVD 256 268

c2 h+ c2 h4 10.66 VC 258 419

c2 h+ c2 h4 10.4±0.3 NS 252 1129

(El on neutral fragment from C3 H8 ) c2 h4+

C.sHf! ch2 12.85 LE 207 194

c,h4+ C3 H8 ch4 1 1 .35 ±0.15 VC 255 1408

c2h+ c3 h8 h2 +ch+ 27.2±0.5 VC 269 1408

C,H+ ch2=chch=ch2 c2 h2 12.45±0.1 PI 259 2013

c2 h+ 1-C4 H8 c2 h4 12.38 LE 273 194

c2 h+ cis -2-C4 H8 c2 h4 12.19 LE 267 194

c2 h+ c2 h5 n NH 13.3 ± 0.2 EVD 254 51

(Ethylenimine)

c2 h+ C3 H60 co+h2 1 1 .6 ± 0.2 EVD 272 50

(Propylene oxide)

c2 h4+ (CH2)3 0 ch2 o 12.4±0.3 EVD 290 52

(Trimethylene oxide)

c2 h+ c2 h5 cf3 hcf3 13.0±0.2 EVD 273 1075

c2 h+ c2 h5 bf2 hbf2 12.08±0.01 VC (b) 1076

c2 h4+ (CH2 )3 S ch2 s 13.6±0.2 EVD (b) 52

(Trimethylene sulfide)

c2 ht CsHsOCl CH0 + C1 13.6±0.4 EVD 262 153

(Epichlorohydrin)

c2 h+ C2 H5 SiCl3 HSiCl3 ? 12.48 ±0.05 SL 279 2182

C2 H^ Heat of formation 219 kcal mol 1

c2 h+ c2 h5 8.4 PI 219* 1068

c2 h+ c2 h5 8.25±0.1 RPD 215 2158

c2 h+ c2 h5 8.7 ±0.1 RPD 2158

c2 h+ c2 h5 9.3±0.1 RPD 2158

C,H+ c2 h5 8.78 ±0.05 EVD 228 59

c2 h+ c2 h5 8.80 ±0.05 EVD 228 1129

(El on neutral fragment from n-CeHn)

c2h+ c2 h5 8.7±0.1 NS 226 87

(El on neutral fragment from n-C4 H1 o) C,H-+ c2 h5 8.8±0.1 NS 228 87

(El on neutral fragment from n-C«Hi 4 ) c2 h+ c2 h5 8.5±0.6 NS 221 1129

(El on neutral fragment from C3 H8 ) C.H;t C2 Hs 8.67 TC 225 136, 2038

C2 H+ c2 h5 11.42 TC 288 353

C2 H+ C2 Hh H 12.8 RPD 223 160

C,H+ c2 h« H 14.0 RPD 160

C2 H5- C,Hh H 12.8 MSD 223 1451

c2 h+ C2 Hh H 12.97 LE 227 195

38
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c2 H5+ c2 h« H ? 12.2 RPD 228 160

c2 h+ c2 h« H? 13.3 RPD 160 c2 H+ C2 Hh H-? 14.0 RPD 160

c2 h5+ c2 h6 H? 15.0 RPD 160

c2 h+ c2 h« H? 15.6 RPD 160

c2 h+ C3 H8 ch3 12.15±0.15 VC 222 1408

c2 h+ c3 h8 ch3 12.2 MSD 223 1451

c2 h+ c3 h8 ch3 12.24 LE 224 195

c2 h+ c3 h8 ch+ 21 ±2 VC 200 1408 c2 h+ c3 h8 26.9 ± 0.5 VC 1408 c2 h+ c2 h5 och c2 h 12.9±0.1 VC (b) 13 c2 h: ct's-2-C 4 H8 c2 h3 12.25 LE 216 194, 195

n-C4 Hio c2 h5 12.55 LE 234 195

c2 h+ iso-CjHio c2 h5 13.80 LE 261 195

c2 h+ n-C5 H]2 28.1 ±0.2 SRP 1264

(Excess KE ion)

|| C2 H^ nco-C.-;Hi 2 ch3 +c2 h4 13.81 VC 233 2101

C,H,+ n-C 7 Hi6 24.3 ±0.2 SRP 1264

(Excess KE ion)

c2 h5+ c2 h5 n=nc2 h5 c2 h5 +n2 10.45 ±0.2 SL 249 304

c2 h- c2 h5 oh OH 12.4 RPD 220 2018

c2 h- c2 h5 oh 0H-? 10.5 RPD 220 2018

c2 h+ c2 h5 oh 0H-? 11.6 RPD 2018

CiH+ c2 h5 oh OH-? 12.4 RPD 2018

c2 h+ c2 h5 oh 0H-? 13.2 RPD 2018

c2 h+ c2 h5 oh 0H-? 13.8 RPD 2018

c2 h

c2 h5 cho CHO 11.48±0.11 NS 220 130

c2 h- (CH^O CO + H 12.6±0.2 EVD 241 52

(Trimethylene oxide)

c2 h- CH3 COC2 H5 ch3 +co? 12.95 ±0.1 SL 235 298

c2 hi (CH2 )4 0 15.8 ±0.2 EVD 52

(Tetrahydrofuran)

c2 h- CH3 COOC2 H5 ch3 +co2 12.1 RPD 243 2018

c2 h+ CH3COOC2 H5 ch3 co-? 8.9 RPD 2018

c2 h+ CH3 COOC2 H5 ch3 co2-? 10.0 RPD 2018 c2 h+ ch3 cooc2 h5 ch3 co-? 10.6 RPD 2018 c2 h+ CH3 COOC2 Hs ch3 co-? 11.6 RPD 2018

c2 h+ c2 h5 no2 no2 11.0 RPD 222 2018

c2 h+ c2 h5 no2 NO-? 7.0 RPD 2018

c2 h- C2 H5N02 NO-? 8.1 RPD 2018

c2 h- c2 h5 no2 NO-? 8.8 RPD 2018

c2 h- C2 H5N02 N02-? 9.8 RPD 2018

c2 h- CzHsNO, NO-? 10.4 RPD 2018

c2 h- C2 H50N02 no3 ? 11.86±0.25 VC (b) 1013

c2 h- n-C5 Hn F 14.67 SL 2029

c2 h- C2 H5CF3 cf3 12.82 ±0.02 SL (a) 1075

c2 h- c2 h5 bf2 bf2 13.1 ±0.2 VC (a) 1076

c2 h+ C2 HsSiH3 SiH3 12.6 ±0.2 SL (b) 2182

c2 h

C2 H5 SCH3 ch3 + s 14.1 ±0.2 EVD 226 176

c2 H- n-C3H7 SCH3 15.3 ±0.5 EVD 176

QHJ (C.HshS C2H5 + S 14.5 ±0.3 EVD 237 84

c6 h5 sc2 h5 CeHs+S 13.7 SL (b) 307

(Phenyl ethyl sulfide)

39
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol - x

) c2 h+ c2 h5 ssc2 h5 C2 H5S+S 14.2 ±0.2 EVD 218 186

c2 hj c2 h5 ncs NCS 12.9 + 0.2 EVD (b) 315

c2 h+ c2 h5 ci Cl 12.3 RPD 229 160

c2 h- c2 h5 ci Cl 12.2 ±0.2 VC 227 356

c2 h+ c2 h5 ci ci-? 8.5 RPD 228 160

c2 h+ c2 h5 ci ci-? 9.6 RPD 160

c2 h? c2 h5 ci ci-? 10.4 RPD 160

c2 h- C2 H5C1 ci-? 11.4 RPD 160

c2 h+ c2 h5 ci ci-? 11.9 RPD 160

c2 h+ «-c3 h7 ci CH2 C1 12.48±0.1 SL (b) 72

c2 h+ C2 H5 SiCl3 SiCh 12.77 ±0.05 SL (b) 2182

c2 h+ C2 H5 Br Br 11.5 RPD 226 160

c2 h- C2 H5 Br Br 1 1 .4 ± 0.

VC 223 356

c2 h+ C2 H5 Br Br-? 8.2 RPD 230 160

c2 h+ C2 H5 Br Br"? 9.3 RPD 160

c2 h- C2 H5 Br Br-? 10.0 RPD 160

c2 h+ C2 H5 Br Br-? 11.1 RPD 160

c2 h- C2 H5 Br Br-? 11.5 RPD 160

c2 h+ c2 h5 i I(2 F*3/2) 11.0 RPD 228 160

c2 h- c2 h5 i I 11.0±0.3 VC 228 356

c2 h+ c2 h5 i I(2 P1/2 ) 12.0 RPD 230 160

c2 h? c2 h5 i I-? 7.8 RPD 225 160

c2 h+ c2 h5 i I-? 8.9 RPD 160

c2 h+ C2 H5l I-? 9.7 RPD 160

c2 hj c2 h5 i I-? 10.6 RPD 160

C.Ht c2 h5 i I-? 11.3 RPD 160

c2 h- (CuHshHg 10.25 ±0.1 SL 306

c2 h6+ Heat of formation 245 kcal mol -l

c2 h+ C.He 11.521 ±0.007 PI 245* 1253

c2 h+ C2 H« 11.65±0.03 PI 248* 182

c2 h+ C2 He 11.49 PE 245* 1130

c2 h+ C2 H6 14.74 PE 1130

c2 h+ C2 H6 19.18 PE 1130

c2 h+ C2 He 20.13 PE 1130

c2 h+ C2 H6 11.65 TC 248 2038

c2 h+ C2 He 11.76 TC 251 1352,2020

c2 h+6 C2 He 12.64 TC 1352, 2020

c2 h+6 c2 h« 17.33 TC 1352,2020

c2 h- C2 Hs 24.02 TC 1352,2020

c2 h- C2 He 11.78 TC 251 136

c2 h- C2 H6 12.04 TC 257 1006

c2 hj C2 H6 12.21 TC 261 473

c2 h- C2 H6 12.57 TC 270 353

c2 h- (CH2 hO CO 10.8±0.3 EVD 252 52

(Trimethyle ne oxide)

40
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c3 h+

c3 h+ CH3 C = CH h2 + h? 15. 4± 0.3 VC 347 13

c3 h+ CH^CHC^CH 18.71 VC 2102

c3 h+ CH2=CHCH-CH2 ch3 + h2 12.44 VC 280 2102

c3 h+ CH2=CHCH=CH2 CH3 + 2H 18.96 VC 326 2102 c3 h+ c2 h5 c=ch ch3 + h2 12.59 VC 297 2102

c3 h+ c2 h5 c=ch CH3 + 2H 17.62 VC 308 2102

c3 h+ C3 HeS 22.2 ±0.5 EVD 188

(Propylene sulfide)

c3 h+ ch3 sch2 ch=ch2 CH3 S+2H2 ? 16.6 ±0.5 EVD 360 186

C3 H^ Heal of formation 365 kcal mol -i

c3 h+ ch3 och h2 14.0±0.1 VC 367* 13 c3 h+ C4 HfiO ch2 o+h2 15.8±0.5 EVD 402 153

(3 ,4-Epoxy-l -butene)

c3 h.+ C3 HeS H2 S + 2H? 19.2 ±0.4 EVD 363* 188

(Propylene sulfide)

c3 h+ CH3 SCH2 CH=CH2 CH3 S+H+H2 ? 20.3 ±0.5 EVD 394 186

C3 H^ Heat of formation 255 kcal mol -l

c3 h3+ ch2 och 8.34 TC 267 136 c3 h3+ c3 h3 5.80 TC 136

(Cyclopropenyl radical)

c3 h3+ CH2=C=CH2 H 12.02 ±0.03 SL 271 165 c3 h3+ ch3 c=ch H 12.00 ±0.05 SL 269 462 c3 h3+ ch3 c=ch H 12.06 ±0.06 SL 270 17

c3 h3+ ch3 c=ch H 11.8± 0.1 VC 264 13

c3 h3+ C3 H4 H 11.15± 0.06 NS 272 165

(Cyclopropene) c3 h+ C3 He h2 + h 14.21 LE 280 194 c3 h+ ch3 ch=c=ch2 ch3 11.00 ±0.03 SL 259 462 c3 h3+ CH^CHCH^CH, ch3 11.35 ±0.05 PI 255* 2013

c3 h3+ CH^CHCH—CH2 ch3 11.71 ±0.02 SL 263 462

c3 h3+ c2 h5 c=ch ch3 11.02 ±0.05 SL 260 462 c3 h3+ c2 h5 och ch3 10.8 ±0.2 VC 255 13

c3 h3+ ch3 c=cch3 ch3 11.4± 0.2 VC 265 13 c3 h3+ i-c4 h8 ch3 +h2 13.82 LE 285 195

c3 h3+ cis-2-C4 H8 ch3 + h2 13.75 LE 282 195

c3 h+ neo-C5 H12 CH3 + 2H> 17.08 VC 321 2101 c3 h3+ ch=cch=chch=ch2 c3 h3 14.57 EVD 349 1197

c3 h3+ c2 h5 c=cc=ch c3 h3 12.20 EVD (b) 1197 c3 h+ ch3 c=cch2 c=ch c3 h3 12.05 EVD (b) 1197

c3 h3+ ch3 c=cc^cch3 c3 h3 11.99 EVD (b) 1197

c3 h3+ ch=cch2 ch2 c=ch c3 h3 12.17 EVD (b) 1197 c3 h3+ C6 He c3 h3 15.17 ± 0.1 EVD (b) 1238

(Benzene)

c3 h3+ CeH. c3 h3 16 EVD (b) 1197

(Benzene)

C3 H+ c6 h3 c3 h3 16.1 ±0.3 SL 316 2103

(Benzene)

C3 H+ c8 h8 c3 h3 +c2 h2 11.14 ± 0.18 EVD (b) 2105

(Cubane)

41
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

C3 H3+ (CH2 )4NH 18.9 ±0.4 EVD 52

(Pyrrolidine)

C3 H3+ c5 h5 n C2 H2 N? 14.00 ±0.10 EVD (b) 1406

(Pyridine)

C3 H3+ (CH2 )30 oh+h2 14.5 ±0.2 EVD 301 52

(Trimethylene oxide)

C3 H+ n-C3 H7 OH OH + 2H2 15.6 ±0.3 LE 288 46

C3 H3+ c4 h6 o ch2 o+h 13.5 ±0.3 EVD 297 153

(3,4-Epoxy-l-butene)

C3 H3+ (CH2 )4 0 CH30 + 2H? 18.7 ± 0.6 EVD 284 52

(Tetrahydrofuran)

C3 H3+ C.HsO, 15.9 ±0.4 EVD 153

( 1 ,2-Epoxy-3-methoxypropane)

C3 HJ CeHsF 14.27 ±0.1 SL 2103

(Flourobenzene)

c3 h3+ c3 h6 s h2 + h+s 15.9± 0.2 EVD 268 188

(Propylene sulfide)

C3 H3+ (CH.bS h2 + h+s 15.3 ±0.4 EVD 249 52

(Trimethylene sulfide)

C3 H3+ C.FLtS CHS 12.8 ± 0.2 EVD (b) 2166

(Thiophene)

c3 h3+ ch3 sch2 ch=ch2 16.5 ±0.4 EVD 186

QH+ (CH2 )4 S CHS+ 2H2 17.2 ±0.2 EVD (b) 52

(Tetrahydrothiophene)

C3 H3+ n-C3 H7 SCH3 18.4 ±0.5 EVD 176

C3 H+ fso-C3 H7 SCH3 21.0± 0.5 EVD 186

C3 H3+ CH3 C=CC1 Cl 11 . 0 ± 0.2 VC 262 13

C3 H.J" C5 H5 V(CO)4 13.5 ±0.3 EVD 1381

(Cyclopentadienylvanadium tetracarbonyl)

C3 H3+ C5 H5 Mn(CO)3 20.3 ±0.4 EVD 1381

(Cyclopentadienylmanganese tricarbonyl)

C3 H3+ CH3 C=CBr Br 11.1 ± 0.2 VC 278 13

c3 hd2+

C3 HD+ cd3 c=ch D 12.22 ±0.05 SL 17

c3 d3+

c3 d+ cd3 c=ch H 12.16±0.06 SL 17

42
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) CH2=C=: CH^ Heat of formation 280 kcal mol 1 ch3 c^ch+ 283 kcal mol 1 cyclo-C3 H| 296 keal mol-1

C3 H+ CH2=C=CH2 10.16±0.02 SL 280* 462

C3 H+ CH2=C=CH2 10.19 TC 281 136

c3h+ ch3 c=ch 10.36 ±0.01 PI 283* 162, 182,

416,22 c3 h+ ch3 c=ch 10.54 ±0.03 SL 287 17

c3 h+ ch3 c=ch 10.3±0.1 VC 282 13

c3h+ ch3 c=ch 10.44 TC 285 136

c3h+ c3 h4 9.95 SL 296* 62

(Cyclopropene)

c3 h+ c3 h4 10.28 ±0.1 NS 1129

(El on neutral fragment from C3 H8) c3h+ c3 h4 8.2 ± 0.2 NS 87

(El on neutral fragment from n-C4 Hio)

c3 h+ c3 h4 8.2 ±0.4 NS 87

(El on neutral fragment from n-CeHi4 ) c3 h+ c3h4 8.7±0.5 NS 87

(El on neutral fragment from benzene)

c3 h+ c3 h6 h2 12.52 LE 294 194, 195 c3h+ c4 h6o co + h2 11.3±0.3 EVD 297 153

(3,4-Epojcy-l-butene)

c3h+ (CH2 )4 0 15.2±0.3 EVD 52

(Tetrahydrofuran)

C3H+ C3 H6S s+h2 14.4 ±0.3 EVD 285 (—1 CO CO (Propylene sulfide)

c3 hd3+

c3 hd+ cd3 c=ch 10.62 ±0.05 SL 17

C3 H^ Heat of formation 216 keal mol -l

cyclo-C3 H^ 239 keal mol -l

c3 h+ ch^chch. 8.15±0.03 SL (a) 2114

C3 Hj c3 h5 8.05 ±0.1 SL (a) 123

(Cyclopropyl radical)

c3h+ c3h5 8.05 TC 254 2184

(Cyclopropyl radical)

c3 h+ c3h5 8.31 TC 260 123

(Cyclopropyl radical)

c3 h+ c3h5 8.0±0.1 NS 87, 1129

(El on neutral fragment from C3 H8 ) c3 h+ c3h5 8.15±0.1 NS 1129

(El on neutral fragment from n-C8 Hi4 ) C3 H+ c3h5 8.2±0.1 NS 87

(El on neutral fragment from n-C4 Hio)

C3 H+ c3 h5 8.2 ±0.1 NS 87

(El on neutral fragment from n-CeHi4 ) C3H+ c3h6 H 11.4±0.5 MSD 216* 1451

c3 h+ c3h6 H 12.11 LE 232 194, 195 c3h+ c3h6 H 12.06 SL 239* 123

(Cyclopropane)

43
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c3 h+ c3 h8 h2 + h 14.76 LE 263 195

c3 h+ i-c4 h8 ch3 11.4±0.5 MSD 230 1451

c3 h+ i-c4 h8 ch3 11.73 LE 237 194, 195

c3 h- cis-2-C4 H8 ch3 11.60 LE 233 194, 195

c3 h+ n-C 4 Hio ch3 +h2 13.40 LE 246 195

c3 h+ 150-C 4 Hio ch3 +h2 14.55 LE 270 195

c3 h+ neo-C5 Hi2 ch3 +ch4 13.13 VC 248 2101

C3 H+ AI-C 7 H16 12.7±0.1 PI 248 2013

c3 h+ c3 h5 cn CN 12.70±0.15 EVD 236 202

(Cyclopropyl cyanide)

C3 H+ (CH2 )3 0 OH 11 . 8 ± 0.2 EVD 239 52

(Trimethylene oxide)

C3 Ht c4 h6 o CO + H 11.1 ± 0.2 EVD 240 153

(3,4-Epoxy-l-butene)

c3 h+ (CH2 )4 0 15.5 ±0.3 EVD 52

(Tetrahydrofuran)

C3 H+ n-C 5 H„F 14.12 SL 252 2029

c3 h5+ C3 HeS SH 11.5± 0.2 EVD 251 188

(Propylene sulfide)

C3 H- (CH2 hS SH 12.2 ± 0.2 EVD 262 52

(Trimethylene sulfide)

C3 H+ ch3 sch2 ch=ch2 12.7 ±0.3 EVD 186

Q.H+ (CH2 )4 S 15.5 ± 0.2 EVD 52

(Tetrahydrothiophene)

c3 h5+ n-C3 H7 SCH3 14.8 ± 0.2 EVD 176

c3 h+ iso-C3 H7 SCH3 15.2 ±0.2 EVD 186

C3 H^ Heat of formation 229 kcal mol 1 cyclo-C3 H<[ 245 kcal mol-1

c3 h6+ C3 H6 9.74 S 229* 133

c3 h6+ C3 Ha 9.80 S 133

c3 h6+ c3 h« 9.727 ±0.01 PI 229* 1253

c3 h6+ c3 h6 9.73 ±0.01 PI 229* 182,416

c3 h6+ c3 h« 9.73 ±0.02 PI 229* 1120

c3 h6+ c3 h« 9.73 PI 229* 133

c3 h+ c3 h6 9.80 PI 133

c3 h+ C3 H« 9.73 PI 229* 168

c3 h6+ C3 H6 9.81 ± 0.09 SL 231 411

c3 h6+ c3 h6 9.74 LE 229 194, 195

C3 H+ c3 h« 9.96 TC 235 136

c3 h6+ c3 h« 10.14 TC 239 353

c3 h+ C3 He 10.09 ±0.02 PI 245* 182,416

(Cyclopropane)

c3 h+ c3 h« 10.53 SL 256 123

(Cyclopropane)

c3 h+ c3 h« 11.29 TC 273 136

(Cyclopropane)

c3 h+ c3 h« 11.45 TC 277 473

(Cyclopropane)

c3 h- c3 h« 9.81 ±0.15 NS 1129

(El on neutral fragment from C3 H8 )

44
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c3h+ c3 h h2 12.2 LE 256 195

c3 h+ «-C4 Hio CH 11.095 ±0.005 PI 244 1120

c3 h+ n-C4 H,o CH 10.77 LE 236 195

C3 H6+ tso-C4 Hio CH, 10.89 ±0.01 PI 237 1120

c3 h6+ iso-C4 Hio CH 10.88 LE 237 195

c3 h+ C5 H10 c2 h 11.23 ±0.07 EVD 239 1146

(1,1-Dimethylcyclopropane)

c3 h+ c5 h10 c2 h 11.24 ±0.03 EVD 239 1146

(cis- 1,2-Dimethylcyclopropane)

C3 H+ c5 h10 c2 h4 11.30 ±0.05 EVD 241 1146

(£rans-l,2-Dimethylcyclopropane)

c3 h+ /1 -C5 H12 c2 h 10.89 ±0.01 PI 236 1120

C3 H+ ISO-C5 H12 c2 h 10.745 ±0.01 PI 231 1120

c3 h6+ n-C6 Hi4 c3 h8 10.95 ±0.02 PI 237 1120

c3 h+ i50-CeHi4 c3 h8 10.86 ±0.015 PI 234 1120

c3 h6+ (CH3 )2CHCH(CH3 )2 c3 h8 10.595 ±0.005 PI 227 1120

c3 h+ 71 -C7 H16 n-C4 H,0 10.96 ±0.015 PI 238 1120

c3 h6+ n-C7 Hi6 n-C4 H,o 10.65 ±0.1 PI 231 2013

C3 H+ n-C3 H7 OH HO 10.50 PI 238 11 c3 h+ (CH2 )4 0 CHO 12.7 ±0.2 EVD 278 52

(Tetrahydrofuran)

c3 h+ n-C5 H„F c2 h5 f 11.47 SL 250 2029

c3 h6+ i50-C3 H7 BF2 hbf2 11.48 ±0.02 LE (b) 1076

c3 h+ t5o-C3 H7 SiH3 SiH 10.81 ±0.04 SL 211 2182

c3 h6+ n-C3 H7 SCH3 CH + S 12.5 ±0.4 EVD 220 176

c3 h6+ iso-C3 H7 SCH3 CH + H2 S 13.5 ±0.2 EVD 201 186

c3 h+ iso-CsHSiCL HSiCl, 10.92 ±0.1 SL 236 2182

«-C3H| Heat of formation 209 kcal mol-1

iso-C3 Hf 190 kcal mol-1

c3 h+ ra-C3 H7 8.1 PI 209* 1068

c3 h+ n-C3 H7 8.15± 0.1 RPD 210 2158

GjH+ n-C3 H7 8.6±0.1 RPD 2158

c3 h7+ n-C3 H7 8.8 ±0.1 RPD 2158

c3 h7+ n-C3 H7 9.2 ±0.1 RPD 2158

c3 h7+ n-C3 H7 9.5 ±0.1 RPD 2158

c3 h7+ ra-C3 H7 8.69 ± 0.05 SL 222 141,145

c3 h+ n-C3 H7 8.20 TC 211 1439

c3 h7+ n-C3 H7 8.51 TC 218 1006

c3 h7+ n-C3 H7 8.61 TC 221 2038

c3 h7+ n-C3 H7 8.68 TC 222 141,145

c3 h7+ tSO-C3 H7 7.5 PI 190* 1068

c3 h7+ iso-C3 H7 7.52 ±0.1 RPD 190 2158

c3 h7+ ISO -C3 H7 8.1 ±0.1 RPD 2158

c3 h7+ iso -C3 H7 8.6±0.1 RPD 2158

c3 h7+ t5o-C3 H7 7.5 TC 190 1439

c3 h7+

iso -C3 H7 7.76 TC 196 1006

c3 h7+ tSO-C3 H7 7.78 TC 196 136

c3 h7+ iSO-C3 H7 7.97 TC 201 141,145

c3 h7+ 150-C3 H7 8.14 TC 204 2038

c3 h7+ iso-C3 H7 8.25 TC 207 2038

c3 h+ C3 Hs H 11.53±0.01 PI 189 1120

c3 h7+ C3 H H 11.76 LE 194 195

45

323-656 0-69—4
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c3 h+ n-C 4 Hio ch3 11.10±0.01 PI 193 1120

c3 h; n-C 4 Hio ch3 11.23 ±0.04 PI 1120

c3 h+ n-C 4 Hio ch3 10.86 LE 187 195

c3 h+ iso-C 4 Hio ch3 11.155±0.015 PI 192 1120

c3 h+ iso-C 4 Hio ch3 11.16 LE 192 195

c3 h+ n-C5 Hi2 c2 h5 11.04 ±0.03 PI 195 1120

c3 h+ n-C 5 Hj2 c2 h5 11.29±0.04 PI 1120

c3 hj 150-C 5 H12 c2 h5 11.145±0.02 PI 196 1120

c3h+ n-C6 Hi4 n-C3 H7 11.14±0.03 PI 195 1120

C3 H± /i-CeHi4 n-C3 H7 11.345 ±0.04 PI 1120

c3 h+ (CH3 )2 CHCH(CH3 )2 tS0-C3 H7 11.24 ±0.04 PI 200 1120

c3 h+ n-C 7 Hi6 c3 h6 +ch3 11.05±0.05 PI 172 2013

c3 h+ (CH3 )3 N2 H n2 h3 ? 10.7 ±0.3 SL 424

c3 h+ (CH3 )4 N2 ch3 n2 h2 10.9±0.2 SL 424

c3 h+ (CH3 )4 N2 13.2 ±0.3 SL 424

c3 hj (CH3 )2 CHN=NCH(CH3 )2 150-C3 H7 +N2 ? 9.35±0.1 SL 221 304

c3h+ n-C3 H7 OH OH 11.8 RPD 201 2018

c3 h+ n-C3 H7 OH OH 12.8 RPD 2018

c3 h+ n-C3 H7 OH OH? 10.0 RPD 202 2018

c3 h* n-C3 H7 OH 0H-? 11.2 RPD 2018

c3 hj n-C3 H7 OH 0H-? 11.8 RPD 2018

c3 h+ n-C3 H7 OH 0H-? 12.5 RPD 2018

c3 h+ n-C3H7 OH 0H-? 12.8 RPD 2018

c3 h+7 n-C3 H7 OH 0H-? 13.4 RPD 2018

c3hi n-C 3 H7 N02 no2 10.6 RPD 201 2018

C3 H| n-C3 H7 N02 NO-? 6.7 RPD 2018

c3 hj rc-C 3 H7 N02 NO-? 8.1 RPD 2018

c3hj ra-C 3H7 N02 NO-? 8.6 RPD 2018

c3 H} n-C3 H7 N02 NO-? 9.0 RPD 2018

c3 H| n-C3 H7 N02 NO-? 9.5 RPD 2018

c3h+ n-C3 H7 N02 NO-? 10.1 RPD 2018

c3h+ n-C 5 HnF c2 h4f? 12.02 SL (b) 2029

c3 H| i5o-C 3 H7 BF2 bf2 12.05 ±0.05 VC (a) 1076

c3 h+ iso-C3 H7 SiH3 SiH3 11.33 ±0.03 SL (b) 2182

c3 hj n-C3 H7 SCH3 ch3 s 12.3 ±0.4 EVD 232 176

C3 H| iso-C3 H7 SCH3 ch3 s 12.7±0.2 EVD 239 186

c3hj (n-C3 H7 )2 S ra-C 3 H3 S? 12.0 SL (b) 307

c3 h+ i5o-C3 H7 Cl Cl 11.3 RPD 195 160

c3 h+ i5o-C3 H7 Cl ci- 7.7 RPD 200 160

c3 h+ jso-C3 H7 C1 ci- 9.1 RPD 160

c3 h+ iso-C 3 H7 C1 ci- 9.6 RPD 160

c3 hj i5o-C3 H7 C1 ci- 10.0 RPD 160

c3 hj i,so-C 3H7 C1 ci- 10.7 RPD 160

c3 hj iso-C 3 H7 Cl ci- 11.0 RPD 160

C3 H+ rc-C 4 H9 Cl CH2 C1 11.92 ±0.1 SL 210 72

c3 hj i5o-C4 H9 Cl ch2 ci 11.26 ±0.1 SL (b) 72

c3 h+ iso-C3 H7 SiCl3 SiCl3 11.36 ±0.1 SL (b) 2182

c3 h+ n-C3 H7 Br Br 11.3 RPD 215 160

c3 h+ n-C 3 H7 Br Br- 7.8 RPD 217 160

c3 h+ ra-C 3 H7 Br Br- 9.6 RPD 160

c3 h+ n-C3 H7 Br Br- 9.9 RPD 160

c3 h+ rc-C 3 H7 Br Br- 10.3 RPD 160

c3 h+ n-C3 H7 Br Br- 10.75 RPD 160

46
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol - 1 )

c3 h+ n-C 3 H7 I I 10.4 RPD 208 160

c3h+ n-C 3 H7 I I- 7.2 RPD 207 160

c3 h+ n-C 3 H7 I I- 8.6 RPD 160 c3 h+ n-C3 H7 I I- 9.1 RPD 160 c3 h+ n-C3 H7 I I- 9.6 RPD 160 c3H| n-C 3 H7 I I- 10.0 RPD 160

c3 h+ (iso-C 3 H7 )2 Hg t5o-C 3 H7 Hg 9.65 ±0.1 SL (b) 306

C3 H£ Heal of formation 231 kcal mol -1

c3 hj c3 h8 11. 140 ± 0.007 PI 232* 1253

C3 H£ c3 h8 11.08 ±0.03 PI 231* 416 c3 ht c3 h8 11.07 ±0.05 PI 230* 182

c3hj c3 h8 11.07 PE 230* 1130 c3 h$ c3 h8 13.17 PE 1130

C3 Hi c3 h. 15.17 PE 1130

C3 Ht c3 h8 15.70 PE 1130 c3 H£ c3 h8 18.57 PE 1130

C3 Hi c3 h8 20.26 PE 1130

C3 Ht c3 h8 11.20 LE 233 195

CsHt c3 h8 10.98 TC 228 2038 c3 h$ c3 h8 11.00 TC 229 2038

C3 H+ c3 h8 11.04 TC 230 136

c3 hi c3 h8 11.21 TC 234 1352, 2020 c3 h+ c3 h8 11.72 TC 1352, 2020

c3 hi c3 h8 12.24 TC 1352,.2020 c3 Ht c3 h8 12.64 TC 1352, 2020 c3H£ c3 h8 16.60 TC 1352, 2020

c3m c3 h8 20.38 TC 1352, 2020

c3 Hi c3 h8 26.22 TC 1352, 2020

C3 H£ c3 h8 11.22 TC 234 473

c4 h+

c4 h+ CH^CC^CH H 12.1 ±0.3 VC 329 13

c4 h+ ch2=chc=ch h2 + h 12.13 VC 297 2102

c4 h+ ch2 =choch 3H 17.02 VC 305 2102

c4 h+ ch2=chch=ch2 2H2 4- H 15.75 VC 337 2102 c4 h+ ch2=chch=ch2 5H 25.30 VC 349 2102

c4 h+ c2 h5 c=ch 2H2 + H 13.20 VC 291 2102

c4 h+ c2 h5 c=ch 5H 22.68 VC 302 2102

C4 HI Heat of formation 337 kcal mol -1

CH=CC=CH 10.2 ± 0.1 VC. 337* 13 c4 h+ CH=CC=CH 9.78 TC 328 136

c4 h+ ch2=chc=ch h2 12.84 VC 365 2102

c4 h+ ch3 c=cch3 H2 + 2H 16.7±0.3 VC 316 13 c4 h+ ch=cch=chch=ch2 17.55 EVD 1197

c4 h+ c2 h5 c=cc=ch C2 H2 + H, 14.15 EVD 366 1197

c4 h2+ ch3 c=cch2 c=ch c2 h2 +h2 15.10 EVD 388 1197 c4 h+ ch=cch2 ch2 c=ch c2 h2 +h2 15.02 EVD 391 1197

c4 h+ c8 h8 2C2 H2 + H2 16.85 ±0.08 EVD 429 2105

(Cubane)

c4 h2+ C5 H5 N HCN + H2 16.17 ±0.10 EVD 374 1406

(Pyridine)

C4 H+ c4h4 n2 h2 +n2 13.67±0.10 EVD 382 1406

(Orthodiazine)

47
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C4 HJ Heat of formation 307 kcal mol -1

C4 H3+ ch2=chc=ch H 12.59 VC 307* 2102

C4 H+ c2 h5 c=ch h2 +h 14.6±0.2 VC 324 13

C4 H3+ ch3 c=cch3 h2 +h 15.1 ±0.2 VC 331 13

C4 H3+ CH=C.CH=CHCH=CH;2 18.27 EVD 1197

C4 H3+ C2 H5 C=CC=CH 15.50 EVD 1197

C4 H3+ ch3 c=cch2 c=ch 15.70 EVD 1197

c4 h3+ ch3c=cc=cch3 15.04 EVD 1197

C4 H3+ ch^cch2 ch2 c=ch 15.45 EVD 1197

C4 H3+ c6h6 18.4 EVD 1197

(Benzene)

C4 H3+ c8 h8 16.74 ±0.21 EVD 2105

(Cubane)

C4 H3+ C5 H5 N HCN + H 16.61 ± 0.10 EVD 332 1406

(Pyridine)

c4 h3+ C4 H4 N2 n2 + h 13.84±0.10 EVD 334 1406

(Orthodiazine)

c4 h^ Heat of formation 294 kcal mol 1 c4 h4+ ch2 =c=c=ch2 9.28 TC 136

c4 h4+ ch2=c=c=ch2 9.64 TC 136

c4h+ ch2=chc^ch 9.87 SL 297* 411

c4 h4+ ch2 =chc=ch 9.49 TC 288 136

c4 h4+ c2 h5 c=ch h2 10.9 ±0.2 VC 291* 13

c4 h4+ ch3 c=cch3 h2 14.0±0.1 VC 358 13

c4 h4+ c=cch=chch=ch2 c2 h2 14.77 EVD 375 1197

c4 h4+ c2 h5 c=cc=ch c2 h2 12 EVD 317 1197

C4 HI ch3 c=cch2 c=ch c2 h2 11.82 EVD 312 1197

c4 h4+ ch3 c=cc=cch3 c2 h2 12.12 EVD 315 1197

c4 h+ ch=cch2 ch2 c=ch c2 h2 11.4 EVD 308 1197

c4 h4+ c6 h6 c2 h2 14.95 ±0.05 EVD 310 1238

(Benzene)

C4 Hi c6 h6 c2 h2 15.55 EVD 324 1197

(Benzene)

c4 h: c6 h6 c2 h2 15.55±0.1 SL 324 2103

(Benzene)

c4h4+ c8 h8 2 C2 H2 13.78 ±0.08 EVD 356 2105

(Cubane)

C4 H| c 10 h8 17.8±0.10 SL 2112

(Azulene)

c4 h4+ CxoH8 19.6±0.20 SL 2112

(Naphthalene)

c4 h4+ c5 h5 n HCN 13.60±0.10 EVD 315 1406

(Pyridine)

C4 H+ c4 h4 n2 n2 11.64 ±0.05 EVD 335 1406

(Orthodiazine)

c4 h4+ c6 h5 f c2 hf 17.00±0.1 SL (b) 2103

(Fluorobenzene)

c4 hj c6 h5 ci c2 hci 17.57±0.1 SL (b) 2103

(Chlorobenzene)

c4 h4+ CeHsBr C2 HBr 16.77 ±0.1 SL (b) 2103

(Bromobenzene)

48
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

\

Heat of

formation

(kcal mol -1

)

Ref.

i C4 H£ Heat of formation 237 kcal mol- 1

c4h+ ch3 chc=ch 7.88 TC 249 136

c4 h+ ch2=chch=ch2 H 11.39±0.05 PI 237* 2013

C4 H5+ c2 h5 c=ch H 11.6±0.1 VC 255 13

c4 h+ ch3 c=cch3 H 12.2±0.1 VC 264 13

CH3 CH=C=CH 2 Heat of formation 259 kcal mol 1 CH2=CHCH=CH£ 236 kcal mol-1

c2 h5 c=ch+ 274 kcal mol-1

ch3 c=cchj 263 kcal mol-1

c4 h+ ch3 ch=c=ch2 9.57 ±0.02 SL 259* 462

c4 h+ ch3 ch=c=ch2 9.53 TC 259 136

c4 h+ ch2=chch=ch2 9.07 ±0.01 PI 236* 182, 416

c4 h+ ch2=chch=ch2 9.075 ±0.05 PI 236* 2013

c4 h+ ch2=chch=ch2 9.08 PE 236* 1130

c4 h+ ch2=chch=ch2 11.25 PE 1130

c4 h+ ch2=chch=ch2 12.14 PE 1130

c4 h+ ch2=chch=ch2 13.23 PE 1130

c4 h6+ ch2=chch=ch2 15.14 PE 1130

c4 h+ ch2=chch=ch2 18.78 PE 1130

c4 h+ ch2=chch=ch2 20.57 PE 1130

c4 h+ ch2=chch=ch2 8.80 ±0.02 RPD 229 224

c4 h+ ch2=chch=ch2 9.1 ±0.1 RPD 224

c4 h+ ch2=chch=ch2 10.4±0.1 RPD 224

c4 h+ ch2=chch=ch2 9.18 ±0.02 SL 238 462

c4 h+ c2 h5 c=ch 10.18±0.01 PI 274* 162, 182,

416, 22

c4 h+ c2 h5 c=ch 10.2±0.1 VC 275 13

c4 h+ ch3 c=cch3 9.9±0.1 VC 263* 13

c4 h+ ch3 c=cch3 9.69 TC 258 136

c4 h6+ (CH2 )4 S h2 s 11.9±0.2 EVD 271 52

(Tetrahydrothiophene)

n-C4Hf Heat of formation 203 kcal mol-l

cyclo-C4 Hf 213 kcal mol-l

cyclo-C3 H4CH^ 221 kcal mol-l

c4 h+ ch3 ch=chch2 7.71 ±0.05 EVD (a) 108

c4 h7+ ch3 ch=chch2 7.75 TC 205 136

c4 h+ CH2=C(CH3 )CH2 8.03 ±0.05 EVD (a) 108

c4 h+ CH2-C(CH3)CH2 8.01 VC 206 108

c4 h+ CH2=C(CH3)CH2 8.04 TC 206 136

c4 h+ c4 h7 7.88 ±0.05 SL (a) 123

(Cyclobutyl radical)

c4 h+ c4 h7 7.93 TC 2184

(Cyclobutyl radical)

c4 h+ 1-C4 Hh H 11.07±0.1 203* 2114

c4 h+ i-c4 h8 H 12.01 LE 225 194, 195

c4 h7+ cis-2-C4 H8 H 11.20 LE 205 194, 195

c4 h+ C4 H8 H 11.24 SL 213* 123

(Cyclobutane)

c4 h+ c5 h10 ch3 11.38 ±0.02 EVD 221* 1146

(1,1-Dimethylcyclopropane)

49
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c4 h+ c5 h10 ch3 11.35±0.05 EVD 220* 1146

(cis— 1 ,2-Dimethylcyclopropane)

c4 h+ c5 h10 ch3 11.41 ±0.04 EVD 222 * 1146

(tra/is- 1,2-Dimethylcyclopropane)

c4 h7+ n C7 H16 n—

3 H7 + H2:? 11.5 ± 0.1 PI 198 2013

c4 h+ n C5 H11 F CHg + HF? 11.42 SL 220 2029

c4 h+ (CH2 )4 S SH 12.4 ±0.2 EVD 244 52

(Tetrahydrothiophene)

g4h+ ch3 ch=chch2 i I 9.15 ±0.05 EVD 200* 108

c4 h+ CH2=C(CH3 )CH2 I I 9.40 ±0.05 EVD 205* 108

I-C4 HJ Heat of formation 221 kcal mol-1

cis-2-C4H£ 209 kcal mol-1

tra#is-2-C4 H£ 208 kcal mol-1

iso-C4 H£ 209 kcal mol-1

cyclo-C4 H^ 250 kcal mol-1

c4h*+ i-c4 h8 9.58±0.01 PI 221* 182, 416

c4h8+ i-c4h8 9.61 ±0.02 PI 222* 1120

C4Hg+ i-c4 h8 9.58 PI 221* 133

c4h8+ i-c4 h8 9.76 SL 225 62

c4 h8+ i-c 4 h8 9.72 LE 224 194, 195

c4h8+ cis-2-C4 H8 9.13±0.01 PI 209* 182

c4h8+ ci5-2-C 4H8 9. 13 ±0.02 PI 209* 168

ci5-2-C 4 H8 9.34 SL 214 62

c4 h8+ ci5-2-C4H8 9.25 LE 212 194, 195

c4h8+ frans-2-C4 H8 9.13 ±0.01 PI 208* 182

c4h8+ trans-2-C4 H8 9.13 ±0.02 PI 208* 168

c4 h8+ tra/i5-2-C 4 H8 9.27 SL 211 62

c4h8+ 2-C4 H8 9.23 SL 411

c4h8+ 2-C4H8 9.33 TC 136

c4 h8+ IS0-C4H8 9.23 ±0.02 PI 209* 168

c4h8+ iso-C4H8 9.23 ±0.02 PI 209* 182

c4h8+ 150-C4 H8 9.26 SL 209 62

c4h8+ 150-C 4 H8 9.44 TC 214 136

c4h8+ c4 h8 10.34 TC 245 473

(Methylcyclopropane)

c4 h8+ c4 h8 10.58 SL 250* 123

(Cyclobutane)

c4 h8+ c4 h8 10.05 TC 238 473

(Cyclobutane)

c4 h8+ c4 h8 11.04 TC 261 136

(Cyclobutane)

C4 H+ n-C5 Hi2 ch4 10.845 ±0.005 PI 233 1120

c4 h8+ 150-C5 Hi2 ch4 10.685 ±0.005 PI 227 1120

c4 h8+ neo-C5 Hi2 ch4 10.37±0.01 PI 217 1120

c4 h+ n-C6 Hi4 c2 h6 10.82 ±0.005 PI 230 1120

c4 h8+ i50-CeHi4 c2 h6 10.54 ±0.005 PI 222 1120

c4 h8+ (C 2H5 )2 CHCH3 c2 h6 10.495 ±0.005 PI 221 1120

c4 h8+ C2 H5 C(CH3 )3 c2 h6 10. 19 ±0.05 PI 211 1120

50
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c4 h+ 71 -C 7 H16 c3 h8 ? 10.87 ±0.005 PI 231 1120

c4h8+ A1-C 7 H16 c3 h8 ? 10.56 ±0.05 PI 223 2013

c4h8+ 7Z-C 8 Hi8 n-C4 Hio 10.985 ±0.02 PI 234 1120

c4 h8+ ?er£-C 4 H9 SiH,3 SiH4 ? 9.89 ±0.05 SL 2182

c4 h8+ tert-C 4 HgSiCl3 HSiCl3 ? 10.26 ±0.2 SL 2182

w-C4 H£ Heat of formation 218 kcal mol -1

sec-C4 H^ 192 kcal mol -1

iso-C4 H^ 205 kcal mol -1

tert-C4H£ 176 kcal mol 1 c4 h9+ ra-C 4 H9 8.64 ±0.05 SL 218* 141, 145

c4 h9+ n-C 4H9 8.0 TC 203 1439

c4h,+ n-C 4 H9 8.47 TC 214 1006

c4 h9+ n-C4 H9 8.60 TC 217 2038

c4 h9+ n-C 4 H9 8.64 TC 218 141, 145

c4h9+ sec-C 4 H9 7.93 ±0.05 SL 192* 141, 145

c4h9+ sec-C 4H9 7.6 TC 184 1439

c4h>+ sec-C4 H9 7.67 TC 186 1006

c4h9+ sec-C 4 H9 7.87 TC 190 141, 145

c4h9+ sec-C 4 H9 8.11 TC 196 2038

c4hj sec-C 4 H9 8.22 TC 198 2038

c4h9+ i50-C4 H9 8.35 ±0.05 SL 205* 141, 145

c4h9+ iso-C 4 H9 7.8 TC 193 1439

c4h9+ 150-C4 H9 8.55 TC 210 141, 145

c4h^ tso-C 4 H9 8.57 TC 210 2038

c4h9+ tert-C 4H9 7.42 ±0.07 SL 176* 141, 145

c4 h9+ tert- C4 H9 6.94 TC 164 1006 c4h9+ tert- C4H9 7.07 TC 168 136 c4h9+ tert- C4 H9 7.3 TC 173 1439

c4h9+ tert-C 4 H9 7.32 TC 173 141, 145

c4h> tert-C.4H9 7.79 TC 184 2038

c4h9+ terr-C 4 H9 7.97 TC 188 2038

c4 h9+ n-C4 Hio H 11.11 LE 174 195 c4h^ 15O-C4 Hi0 H 11.6 LE 183 195 c4 h9+ n-C5 Hi2 ch3 10.955 ±0.04 PI 184 1120

c4 h9+ n-C5 Hi2 ch3 11.095 ±0.04 PI 1120

c4 h9+ ISO-C 5 H12 ch3 10.975 ±0.04 PI 183 1120

c4 h9+ 1 S 0-C 5 H12 ch3 11.325 ±0.04 PI 1120

c4 h9+ neo-C5H12 ch3 10.55 ±0.005 PI 170 1120

C4 Hq+ neo-C5 Hi2 ch3 10.83 VC 177 2101 c4h8+ ferf-C 4 H9 SiCl3 HSiCla? 10.26 ±0.2 SL 2182

c4 h+ n-C6 Hi 4 C2 H5 10.86 ±0.04 PI 185 1120

c4 h9+ n-CfiHi 4 C2 H5 11.115 ± 0.04 PI 1120

c4 h+ iso-CgHu C2 H5 10.59 ±0.005 PI 178 1120

c4 h+ (C2 H5 )2CHCH3 C2 H5 10.785 ±0.04 PI 183 1120

c4 h+ (C2 H5 )2 CHCH3 C2 H3 11.125 ±0.04 PI 1120

C4 H+ C2 H5 C(CH3)3 C2 H5 10.495 ±0.01 PI 173 1120

c4 h9+ n-C7H16 n-CaH? 10.95 ±0.04 PI 186 1120 c4 h+ «-C7 Hi6 «-c3 h7 10.56 ±0.05 PI 177 2013

c4 h+ n-CsHig n-C4 H9 11. 19 ±0.04 PI 190 1120

51
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-

*)

c4 h+ n-C4 H9 ONO no2 10.6 RPD 201 2018

c4 h9+ rc-C4 H9 ONO no2 11.6 RPD 2018

c4 h9+ n-C4 H9 ONO no2-? 6.7 RPD 2018

c4 h* n-C4 H9 ONO no2 ? 7.9 RPD 2018

c4h+ n-C4 H9 ONO no2 ? 8.9 RPD 2018

c4 h,+ n-C4 H9 ONO no2 ? 9.5 RPD 2018

c4 h9 n-C4 H9 ONO no2 ? 9.9 RPD 2018

c4 h9+ £ert-C4 H9 SiH3 SiHa 10.25 ±0.02 SL 2182

c4 h+ terf-C4 H9 SiCl3 SiCla 10.72 ±0.1 SL 2182

c4 h9+ (n-C4 H9 )2 Hg n-C4 H9 Hg 10.55 ±0.1 SL (b) 506

w-C4 H.+

0 Heat of formation 215 kcal mol 1 212 kcal mol 1

C4 H+, n-C4 Hio 10.63 ±0.03 PI 215* 416, 182

^H+o n-C4 Hio 10.50 PE 212 1130

c4 h+

0 n-C4 Hio 12.36 PE 1130

c4 h+ n-C4 Hio 14.13 PE 1130

G.H+Q n-C4 Hio 15.69 PE 1130

C4 H+ n-GiHio 19.96 PE 1130

c4 h+ n-C4 Hio 10.23 LE 206 195

c4 h+

0 n-C 4 Hio 10.66 TC 216 2038

C4 H+ n-C4 Hio 10.68 TC 216 2038

c4 h+

0 n-C4 Hio 10.71 TC 217 136

C*Hf0 n-C4 Hio 10.77 TC 218 473

C4 H+ n-C4 Hio 10.81 TC 219 1352, 2020

c4 h+ n-C4 Hio 11.56 TC 1352, 2020

C4 H+

0 n-C4 Hio 11.71 TC 1352, 2020

C4 H+

0 n-C4 Hio 12.24 TC 1352, 2020

c4 h+

0 n-C4 Hio 12.64 TC 1352, 2020

c4 h+

0 n-C4 Hio 16.21 TC 1352, 2020

c4 h+ n-C4 Hio 18.64 TC 1352, 2020

c4 h+

0 n-C4 Hio 22.98 TC 1352, 2020

C.H+ n-C4 Hio 27.23 TC 1352, 2020

C4 Ht„ iso- C4H10 10.57 PI 212 * 182

C4 H-0 iso- C4 H10 10.78 PE 216 1130

C4 H+

0 tso-C4 Hio 12.54 PE 1130

C4 H+

0 iso- C4 Hi 0 14.51 PE 1130

C4 H+

0 ISO-C4 H1 O 18.63 PE 1130

c4 h+() tso-C4 Hio 19.86 PE 1130

c4 h+

0 ISO-CtHio 10.79 SL 217 62

C4Hto 150-C4 Hio 10.23 LE 204 195

c4 h0 iSO-C4 Hio 10.79 TC 217 136

c4 h+

0 I.SO-C4H10 10.94 TC 220 1352, 2020

c4 h+

0 iso- C4 H10 10.98 TC 221 2038

c4h+ wo-C4 H,o 11.00 TC 222 2038

C5 HJ

C5 H+ CHaC^CC^CCHi CH, 13.55 EVD 368 1197

C,H+ C«Hh 14.59 ±0.24 EVD 2105

(Cubane)

52
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-

*) cm

c5 h+ C5H5 8.69 ±0.1 SL 68

(Cyclopentadienyl radical)

C5 H+ C5 H5 8.82 TC 136

(Cyclopentadienyl radical)

c5 h5+ c5 h6 H 12.6 SL 270 68

(Cyclopentadiene)

C5 H+ C5 Ii; H 11.9 ± 0.5 MSD 254 1451

(Cyclopentadiene)

C.-, H+ C7 1L c2 h2 +h 16.0 SL 306 219

(Cycloheptatriene)

C5 H+ C7 Hh c2 h2 + h 14.89 SL 299 219

(Bicyclo(3 • 2 • 0)heptadiene-2,6)

cyclo-C5 H^ Heat of formation 239 kcal mol-1

c5 h+ c5 h„ 8.93 ±0.05 SL 238* 2163

(Cyclopentadiene)

c5 h+ c5 h« 9.00±0.1 SL 239* 68

(Cyclopentadiene)

C5 H+ CsHe 8.91 TC 237 136

(Cyclopentadiene)

c5 h+ c7 h8 c2 h2 10.45 SL 249 219

(Bicyclo(3-2-0)heptadiene-2,6)

C5 H + C7 Hh c2 h2 10.02 VC 239 219

(Bicyclo ( 3 -2 - 0 ) heptadiene-2 , 6) c5h+ c7 H10 c2 h4 10.70 SL 256 219

(Cycloheptadiene)

c5 h+ C7 Hjo c2 h4 9.58± 0.15 SL (a) 2155

(Norbornene) c5 h^ c7 h10 c2 h4 10.15 SL 252 219

(Bicyclo ( 3-2 -0) heptene-6) c5 h6+ c6 h5 nh2 HCN 12.3±0.1 PI 276 1160

(Anibne)

c5 h+ c7 h9 ci C2 H2 C1 9.75 ± 0.15 SL (a) 2155

(Endo-5-chloro-2-norbornene)

c5 h+ c7 h9 ci C2 H3 C1 9.77 ± 0.15 SL (a) 2155

(Exo-5-chloro-2-norbornene) c5 h+ c7 h9 ci C2 H:! C1 10.15±0.15 SL (a) 2155

(3-chloronortricyclene)

C5H5D+

C5H5D+ c6 h5 sd cs 11.9±0.2 SL 1039

(Deuterated benzenethiol)

c5 h7 C5HI C9H16 12.21 ±0.05 EVD 1184, 2028

(cis-Hexahydroindane)

C5H 7 C9H16 12.19 ± 0.03 EVD 1184,2028

(tra/is-Hexahydroindane)

53
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C2 H5 CH=C=CH;[ Heat of formation 252 kcal mol-1

CH3 CH=CHCH=CH2+ 219 kcal mol-1

ch3 ch=c=chch+ 247 kcal mol-1

ch2=chch2 ch=chj 246 kcal mol-1

CH2=CHC(CH3 )=CH2+ 235 kcal mol-1

cyclo-C5 H^ 216 kcal mol-1

c5 h8+ c2 h5 ch=c=ch2 9.42 SL 252* 62

C,H+ ch3 ch=chch=ch2 8.68 SL 219* 62

C5 H+ ch3 ch=chch=ch2 8.84 TC 223 136

C,H+ ch3 ch=c=chch3 9.26 SL 247* 62

c5 h+ ch2 =chch2 ch=ch2 9.58 SL 246* 62

CsH+ ch2=chch2 ch=ch2 8.94 TC 231 136

c5 h+ CH2 =C=C(CH3 ), 9.02 TC 239 136

CH2 =CHC(CH3 )=CH2 8.845 ±0.005 PI 235* 182

c5 h+ CH2=CHC(CH3 )=CH2 8.96 TC 237 136

CrMi CsH* 9.01 ±0.01 PI 216* 182

(Cyclopentene)

C5 H+ C5 Hs 9.09 SL 217 411

(Cyclopentene)

C-H+ c5 h8 9.27 SL 222 62

(Cyclopentene)

c5 h+ c5 h9 f HF 10.56 SL 247 2029

(Fluorocyclopentane)

C5 H+ c5 h9 ci HC1 10.53 SL 239 2029

(Chlorocyclopentane)

cyclo-C5 H^ Heat of formation 194 kcal mol-1

c5 h+ ch3 ch=chchch3 7.34 TC 182 136

c5 h4+ (CH3 )2 C=CHCH2 7.34 TC 184 136

c5 h+ c3 h9 7.79 ±0.03 SL (a) 123

(Cyclopentyl radical)

C5 H+ c5h8 7.83 TC 2184

(Cyclopentyl radical)

CS H+ ChH12 CH:i 10.95 SL 194* 123

(Methylcyclopentane)

CS H+ C«H|6 h-C*H7 ? 12. 12 ±0.05 EVD 216 1145

(cis-L2-Dimethylcyclohexane)

C3 H+ CkHib n-C3H7 ? 12.00 ±0.05 EVD 212 1145

(trans-l ,2-Dimethylcyclohexane)

54
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

l-CsHj+o Heat of formation 214 kcal

cis-2-C5H^0 203 kcal

trans-2-C5 H^0 201 kcal

(CH3 )2 CHCH=CH+ 212 kcal

C2 H5 C(CH3 )=CH2+ 202 kcal

(CH3 )2 C=CHCH^ 189 kcal

cjc/o-C3H4(CHs)^ 225 kcal

cyclo-C5 H|0 224 kcal

mol-1

mol-1

mol-1

mol-1

mol-1

mol-1

mol-1

mol-1

CsH- 1 -C5 H10 9.50± 0.02 PI 214* 182, 1120

c5 h+, 1 -C5 H10 9.67 SL 218 62

C5 H+ C15-2-CsHio 9.11 SL 203* 62

C5 H+ trans-2-CsHio 9.06 SL 201 * 62

C5 H+ (CH3 )2 CHCH=CH2 9.51 ±0.03 PI 212 * 182

CsH+o (CH3 )2 CHCH=CH2 9.60 SL 214 62

c5 h +

0 C2 H5 C(CH3 )=CH2 9.12 ± 0.02 PI 202 * 182

c5 h+ C2 H5C(CH3)=CH2 9.20 SL 204 62

c5 h+ (CH3 )2 C=CHCH3 8.67 + 0.02 PI 189* 182

C5 H+ (CH3 )2 C=CHCH3 8.68 PI 190* 168

C5 H+ (CH3 )2 C=CHCH3 8.89 SL 194 62

C5 Hto (CH3 )2 C=CHCH3 8.86 TC 194 136

C5 HC5 H10 9.78 + 0.02 EVD 225* 1146

(1,1-Dimethylcyclopropane-)

C5 H+ c5 h10 9.76 ±0.02 EVD 225* 1146

(cis- 1 ,2-Dimethylcyclopropane)

c5h+ c5 h10 9.77 ±0.02 EVD 225* 1146

(trans-l,2-Dimethylcyclopropane)

C.H+0 c5 h10 10.53 ±0.05 PI 224* 182

(Cyclopentane)

CsHj, c5 h10 10.92 SL 233 123

(Cyclopentane)

C5 H+ c5 h10 10.53 TC 224 1352, 2020

(Cyclopentane)

C5 H+ c5 h10 10.64 TC 227 473

(Cyclopentane)

«Hf0 c5 h10 10.89 TC 233 136

(Cyclopentane)

C.H& /I-CbHh ch4 10.855 ±0.03 PI 228 1120

C5H+ iSO-C6 H14 CH4 10.67±0.015 PI 222 1120

C5 H+ (C2 H5 ) 2 CHCH3 ch4 10.63 ±0.03 PI 222 1120

CsH+o C2 H5 C(CH3 )3 ch4 10.265 ±0.01 PI 210 1120

C5H+ (CH3 )2 CHCH(CH3 ) 2 ch4 10.47 ±0.02 PI 217 1120

CsHj, n-C7 Hi6 C2 Hh 10.81 ± 0.01 PI 225 1120

CsH+o rc-C 7 H16 c2 h6 10.40 ±0.05 PI 215 2013

CsHjo CgHie c3 h6 11. 62 ±0.08 EVD 216 1145

(cis-l,2-Dimethylcyclohexane)

CsH J, C8 H16 c3 h6 11.60±0.07 EVD 212 1145

{trans-l ,2-Dimethylcyclohexane)

C5 H+ n-C8Hi8 c3 h8 10.90± 0.015 PI 226 1120 c5 h+ n-CsHnF HF 10.07 SL 222 2029

c5 h+ n-C5 HnCl HC1 10.63 SL 227 2029

55
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

n-CsHfj Heat of formation 171 kcal mol-1

g2 h5 ch2 chch^ 173 kcal mol-1

(C2 H5 )2 CH+ 174 kcal mol-1

CH(CH3)2 CHCHJ 168 kcal mol-1

tert-C^H^ 164 kcal mol-1

tieo-CsHjj 196 kcal mol-1

csH+ n-C5 Hn 7.7 TC 187 1439

c5 h+ n-CsHii 8.49 TC 205 1006

c5 h+ n-C5 Hn 8.60 TC 207 2038

C5 H+ n-C3 H7 CHCHa 7.73±0.1 EVD (a) 151

C5 H+ n-CaHyCHCHa 7.66 TC 182 1006

C5 H+ n-CaHrCHCHa 8.11 TC 193 2038

c5 h+ n-CaH7 CHCH3 8.22 TC 196 . 2038

CsHj+j (C2 HakCH 7.86 ±0.05 EVD (a) 151

CsH- (CaHshCH 7.58 TC 179 1006

c5 h+ (C2 Hs)2 CH 8.08 TC 190 2038

c5 h+ (C2 Hs)2 CH 8.20 TC 193 2038

c5 h+ ISO-C5H1X 8.60 TC 206 2038

C5 H+ iso-C3 H7 CHCH3 8.09 TC 189 2038

c5 h1+1 i5o-C3 H7 CHCHa 8.20 TC 192 2038

c5 h+ C2 H5 CH(CH3 )CH2 8.56 TC 205 2038

c5 h+ C2 H5 CH(CH3 )CH2 8.57 TC 205 2038

c5 h+xx £er£-C5 Hn 7.12 ±0.1 EVD (a) 151

c5 h+ x ?ert-C5 Hn 6.94 TC 161 1006

C5H+ x tert- C5 H11 7.77 TC 180 2038

c5 h^ tert-CsHn 7.96 TC 185 2038

CsH+j neo-C5 Hii 8.33 ±0.1 EVD 196* 151

CsH+11 rceo-CsHn 8.54 TC 201 2038

c5 h+11 7l€0- C5H11 8.55 TC 201 2038

c5 h+ x n-CeHi4 CHa 10.89± 0.05 PI 178 1120

c5 h+ f50-C6Hj4 ch3 10.735 ±0.05 PI 173* 1120

CsH+j (C2 H5 )2 CHCHa CHa 10.75 ±0.05 PI 174* 1120

c5 h+ x C2 H5 C(CHa)a CHa 10.475 ±0.03 PI 164* 1120

CsH+j (CH3 )2 CHCH(CH3 )2 CHa 10.58± 0.05 PI 168* 1120

c5 h+xx n-C7 Hi6 C2 Ha 10.43 ±0.05 PI 171* 2013

C5 H+ x n-C7 Hx6 c2 h5 10.80± 0.05 PI 179 1120

c5 mx n-CgHig n-C3 H7 11.045 ±0.05 PI 183 1120

56
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

n-C5 H12 Heat of formation 204 kcal mol 1 iso-C5 H[2 201 kcal mol-1

neo-C5 H/2 199 kcal mol-1

C5 H+ n-C.iHi2 10.35 PI 204* 182

C5 H+ n-Cr,Hi 2 10.25 TC 201 1439

CsHJi re-C5 Hi2 10.49 TC 207 2038

C-H+1

12 n-C5 H12 10.51 TC 207 2038

c5 h+ n-C5 H12 10.54 TC 208 136

c5 h+

2 n-C5 Hi2 10.55 TC 208 473

C-H+ 71 -C5 H12 10.56 TC 208 1006

c5 h

n-C5 Hi2 10.58 TC 209 1352, 2020

c5 h+ n-C5 Hi2 11.31 TC 1352, 2020

C-H+ v>0 ii 12 n-C5 Hi2 11.64 TC 1352, 2020

C5 H+ n-C5 Hi2 11.71 TC 1352, 2020

c5 h+ n-C5 Hi2 12.24 TC 1352, 2020

cfe n-CsHi2 12.64 TC 1352, 2020

c5 h+ n-C5 Hi2 15.97 TC 1352, 2020

C-H+M2 A1 -C5 H12 17.70 TC 1352, 2020

qto n-C5 Hi2 20.79 TC 1352, 2020

c5 h+ n-C5 Hi2 24.68 TC 1352, 2020

c5 h+ «-C5 Hi2 27.76 TC 1352, 2020

C5 H+2 tS0-CsHi2 10.32 PI 201* 182

c5 h+ ISO-C5 H12 10.60 SL 208 62

c5h+ JSO-C5 H12 9.96 TC 193 473

c5 h+ 150 -C5 H12 10.49 TC 205 1352, 2020

C'H ^n+

12 ISO-C5 H12 10.50 TC 205 136

CoH+2 150 -C5 H12 10.61 TC 208 2038

C5 H+ iSO-CsH^ 10.63 TC 208 2038

c5 h+ neo-C5 H!2 10.35 PI 199* 182

CsH+2 neo-C.-,Hi 2 10.30 TC 198 473

C5 H+ neo-C5 Hi2 10.66 TC 206 1352, 2020

C5 H+ neo-C5 Hi2 10.67 TC 206 136

c6 h+ c6 h5 sch3 (Phenyl methyl sulfide)

c6 h

14.4 SL 307

c6 m

c8 h+ c6 h2 9.8 ±0.1 NS' 87

(El on neutral fragment from benzene)

57
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

CeHj Heat of formation 453 kcal mol 1

c6 h3+ c2 h5 c=cc=ch h2 + h 17.92 EVD 455* 1197

c6 h+ CH3 C=CC^CCH3 h2 + h 17.99 EVD 452* 1197

c6 h3+ C.oHk 19.2 ±0.15 SL 2112

(Azulene)

CeYLt CioHh 20.77 ±0.01 SL 2112

(Naphthalene)

G> H.t c6 h4 fci 16.67 EVD 1185

(o-Chlorofluorobenzene)

c6 h+ ChILFCI 16.78 EVD 1185

(m-Chlorofluorobenzene)

0Ht c6 h,fci 16.81 EVD 1185

( p-C hloro fl uorobenze ne)

CeH| Heat of formation 352 kcal mol 1

ChH| Ct) H4 9.75 NS 389 29

(Benzyne)

C«H+ CJL 9.5 ±0.1 NS 383 87

(El on neutral fragment from benzene)

c«h+4 CH=CCH=CHCH=CH.» H2 13.72 EVD 405 1197

G; H; C2 RiC=CC=CH h2 11.07 EVD 349* 1197

ChH+ CH3 C=CCH2 C=CH H2 11.02 EVD 348 1197

ck h4+ CH^CC^CCH, h2 11.35 EVD 351* 1197

ChH4+ CH=CCH2 CH2 C^CH H> 11.17 EVD 357* 1197

c«h4+ CnHe H2 14.59 EVD 356* 1197

(Benzene)

G;Hj ChHh H2 14.09 ±0.07 SL 345* 1238

(Benzene)

Ch H4+ Ch H« H- 14.59±0.1 SL 356* 2103

(Benzene)

CeH| CioH8 16.7±0.15 SL 2112

(Azulene)

c6 h+ CioH8 18.2±0.15 SL 2112

(Naphthalene)

C6 H4 (CeHoL c6 h5 + h 18.05 ±0.3 SL 332 1238

(Biphenyl)

c6 h+ c6 h5 f HF 15.37 ±0.1 SL 393 2103

(Fluorobenzene)

C6 HJ c6 h5 ci HC1 14.87 ±0.2 SL 378 2103

(Chlorobenzene)

c6h4+ C6H5 Br HBr 14.20±0.2 SL 360 2103

(Bromobenzene)

cyclo-C6H£ Heat of formation 285 kcal mol 1 C6 HJ c6h5 9.20 SL 284* 1079

(Phenyl radical)

CeH+ c6 h5 9.35±0.1 NS 288 87

(El on neutral fragment from triphenylstilbene)

c6 h5+ ch=cch=chch=ch2 H 13.52 EVD 348 1197

c6 h5+ c2 h5 c=cc=ch H 11.50 EVD 307 1197

c6h+ CH3 C=CCH2 C=CH H 11.50 EVD 307 1197

c6 h- ch3 c=cc^cch3 H 11.57 EVD 304 1197

c6h+ ch=cch2 ch2 c=ch H 11.47 EVD 311 1197

58
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

CeH^ CeHe H 13.8±0.1 PI 286* 2013

(Benzene)

CeHg CeHg H 14.37 EVD 299 1197

(Benzene)

CeHlr CeHe H 14.44 ±0.05 SL 301 1238

(Benzene)

CeH^ CeHe H 14.37 ±0.1 SL 299 2103

(Benzene)

c6 h+ c6 h5 ch3 ch3 13.7 ±0.1 SL 295 301

(Toluene)

CeHg C7 H10 ch3 +h2 13.8±0.3 LE 316 2155

(Norbornene)

CeH^ CsHs C2 H2 + H 12.21 ± 0.10 EVD 324 2105

(Cubane)

C6H+ CioHs 16.9±0.10 SL 2112

(Azulene)

CgHj CioHs 18.45 ±0.04 SL 2112

(Naphthalene)

C6 H+ (CeHs^ c6 h5 18.2 ±0.5 SL 387 1238

(Biphenyl)

CeH^ (CeH5)2C2 C8 H5 ? 20.7±0.1 SL 1238

(Diphenylacetylene)

c6 h+ c6 h5cho CO + H 14.54 ±0.05 SL 299 1237

(Benzaldehyde)

c6h+ c6 h5cho CO + H 14.0 SL 287 308

(Benzaldehyde)

c6h+ c6h5 cho CHO 13.51 ±0.12 NS 305 130

(Benzaldehyde)

c6h+ c6 h5oc=ch OC2 H 12.2 ±0.1 VC 13

(Phenoxyacetylene)

c6h+ c6 h5 coch3 co+ch3 14.23 ±0.05 SL 299 1237

(Acetophenone)

c6h+ c6 h5 coch3 co+ch3 13.5 SL 282 308

(Acetophenone)

c6h+ c6 h5 coch3 co+ch3 13.42 ±0.07 VC 280 2174

(Acetophenone) c6h5+ c6 h5 ch2 coch3 ch2 co + ch3 13.66 ±0.02 VC 269 2174

(Benzyl methyl ketone)

CeHj (CeH5)20 c6h5 o 14.85 ±0.05 SL 350 1237

(Phenyl ether)

CeH^" (CgHs)2CO c6 h5 +co? 16.22 ±0.07 SL 341 1237

(Benzophenone)

CeH+ (C6H5)2 C02 c6h5 o+co 15.46 ±0.05 SL 344 1237

(Phenyl benzoate)

CgHj (C6Hs)2C202 C6H5 + 2CO? 15.12 ± 0.2 SL 308 1237

(Benzil)

C6H+ (C6 H5 )2 C03 C5H5 +CO+C02 12.1 ±0.1 SL (b) 1237

(Diphenyl carbonate) c6h+ c6h5 conh2 CO + NH2 13.5±0.1 SL 269 1168

(Benzamide) c6 h+ c6 h5 cochn2 CO+CHN2 ? 14.07 ±0.14 VC 2174

(Diazoacetophenone) c6 h+ c6 h5f F 15.47±0.1 SL 311 2103

(Fluorobenzene)

c6h+ c6 h5f F 14.5 ±0.1 SL 289 301

(Fluorobenzene)

c6h+ c6h5 cf3 cf3 15.2 ±0.1 SL 326 301

(Benzotrifluoride)

59
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

C«H+ C6 H5 COCF3 (Trifluoroacetophenone)CO + cf3 12.0 SL 308

c6 h+ c6 h5 sd

(Deuterated benzenethiol)

SD 13.3 + 0.2 SL 1039

C6 H^ CeHsCl

(Chlorobenzene)

Cl 13.2 + 0.1 SL 288 301

Cent c6 h5 ci

(Chlorobenzene)

Cl 13.57 + 0.12 SL 297 2103

c6 h+ c7 h9 ci

(enc(o-5-Chloro-2-norbornene)

CH2 C1+H2 13.0 + 0.3 LE 294 2155

c6 h5+ c7 h9 ci

(e.xo-5-Chloro-2-norbornene)

ch2 ci+h2 13.0 + 0.3 LE 294 2155

c«h5+ c7 h9 ci

(3-Chloronortricyclene)

ch2 ci+h2 12.7 ± 0.3 LE 279 2155

QH+ C6 H5 Br

(Bromobenzene)

Br 12.62 + 0.05 SL 288 2103

C6 R+ C«H5 Br

(Bromobenzene)

Br 12.6 + 0.1 SL 288 301

C6 H+ C6 H5 I (Iodobenzene)

I 12.47 ±0.05 SL 299 2103

cyclo-C6 H£ Heat of formation 233 kcal mol-1

CbH* ch=cch=chch=ch2 9.50 EVD 307 1197

CsH* c2 h5 c=cc=ch 9.25 EVD 307 1197

c6 h+ ch3 c=cch2 c=ch 9.75 EVD 319 1197

c6 h6+ CH3C=CC=CCH3 9.20 EVD 301 1197

CeH- ch=cch2 ch2 c=ch 10.35 EVD 338 1197

C6 Hbt cb h« 9.247 + 0.002 S 233* 422

(Benzene)

c6 h+ c«h6 9.190 + 0.005 s 232* 1114

(Benzene)

c6 h+ cb h« 9.247 s 233* 423

(Benzene)

c«+

6 c6 h« 9.248 s 233* 1115

(Benzene)

CeH- CeHe 9.246 + 0.005 PI 233* 2013

(Benzene)

C«H+ C«H« 9.241 ±0.006 PI 233* 1253

(Benzene)

c«h+ c6 h6 9.242 ±0.01 PI 233* 54. 1118

(Benzene)

C«Hbt c6h6 9.245 ±0.01 PI 233* 182,416

(Benzene)

c6 h+ c6h6 9.24 ±0.02 PI 233* L142, 1166

(Benzene)

c6 h+ c6 h6 9.20 ±0.05 PI 232* 1160

(Benzene)

C6 Hbt C«H« 9.25 PI 233* 1159

(Benzene)

c6 h+ C«H« 9.25 PE 233* 1130

(Benzene)

c6 h+ CeHe 9.39 PE 236 2015

(Benzene)

60
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other AP or IP

products (eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

CsH;

(Benzene)

Ce'He 9.20 ±0.1 RPD 232 2158

c6 h6+ (Benzene)

CeHe 9.40 ±0.1 RPD 2158

c6 h+

(Benzene)

C6 Hk 9.65 ±0.1 RPD 2158

C6H6+ (Benzene)

ca 9.24 EVD 233 1197

C6H6+ 1132

(Benzene)

c6 h6 9.14 SL 231 1132

CHj

(Benzene)

CeHfi 9.22 ±0.05 SL 232 1238

c6 h+

(Benzene)

Ce H« 9.38 SL 236 413

C6 Hbt (Benzene)

CeHe 9.50 SL 239 1079

QH+

(Benzene)

C6 He 9.56 SL 240 1066

Ce H>

(Benzene)

CS H9.60 ±0.05 SL 241 2163

C«H+

(Benzene)

c«h6 9.9 ±0.1 SL 248 301

c6 h+

(Benzene)

C6 Hh 9.46 ±0.1 cs 238 381

c6 h6+ (Benzene)

CeHe 9.52 ± 0.10 cs 239 383

Ce H6t (Benzene)

CeH6 9.7 EC 243 218

C6 Hbt (Benzene)

CfiHe 9.37 TC 236 348

c6h+

(Benzene)

ChH« 9.53 TC 240 136

C6 H+

(Benzene)

c6 h6 10.35 ±0.1 PI 1160

c6 h+

(Benzene)

C6 Hh 10.75 ±0.1 PE 1159

c6h+

(Benzene)

c«h6 11.489 S 285 1115

c6 h+

(Benzene)

ChH6 11.7 ± 0.3 s 290 1114

C«H;t (Benzene)

ChHb 11.53 PI 54

c6 h+

(Benzene)

C«H« 1 1 .5 ± 0.PI 1160

Ch H+

(Benzene)

ChHh 11.49 PE 285 1130

c6h+

(Benzene)

ChHh 11.91 PE 2015

C«H+

(Benzene)

ChH* 12.19 PE 1130

C«H+

(Benzene)

ChHc 13.67 PE 1130

C«H+

(Benzene)

C«Hh 14.44 PE 1130

323-656 0-69—5 61
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

C«H+ c6 h« 16.84 S 408 1115

(Benzene)

C6 H+ c6 h6 16.73 PE 1130

(Benzene)

C«H+ C6 Hb 16.93 PE 2015

(Benzene)

C«H+ CbH6 18.75 PE 1130

(Benzene)

C«H+ CbHh 19.82 PE 1130

(Benzene)

c6 h+ CbH6 9.07 TC 136

(Fulvene)

C6 Hbt c6 h« 9.38 TC

(Fulvene)

ck h6+ c«h8 c2 h2 9.15 + 0.10 EVD 306 2105

(Cubane)

c6 h+ CioH8 c4 h2 13.86 + 0.05 SL (b) 2112

(Azulene)

cb h+ CioH8 c4 h2 15.20 ±0.05 SL (b) 2112

(Naphthale ne)

CbH+ C6 H5 SCH.s ch2 s 12.0 SL 249 307

(Phenyl methyl sulfide)

c6h5 d+

C6 H5 D+ C6 H5 D 9.44 SL 413

(Benzene-G?i

____

C6 H5 D+2 ChH5 D 26.0 ±0.2 FDP 212

(Benzene-ofi)

c6 h5 d^

C6 H,D+ 3 C6 H5 D 44 ±5 NRE 212

(Benzene-a(i

C6D£

C«D+

(Benzene-c^)

c6 d6 9.251 ±0.002 S 422

c6 d+

(Benzene-d6 ) c6 d6 9. 190 ±0.005 s 1114

C«D+

(Benzene-G^)

CgDb 9.251 s 423

ch d+

(Benzene-dn)

ChDh 9.251 s 1115

C«D+

(Benzene-^)

C6 D« 9.245 ±0.01 PI 54

C«D+

(Benzene-^)

c6 d6 9.245 ±0.01 PI 1118

C«D+

(Benzene-c?*,)

C«D« 11.520 s 1115

c6 d+

(Benzene-du)

C(jD(; 11.59 PI 54

c6 d+

(Benzene-dfj)

ChDb 16.87 s 1115

62
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -

*) c6 H|

ceH7+ C5 H4 CH, 8.54 SL 126

(Methylcyclopentadienyl radical)

C«H+ C7 H,o ch3 11.2 ± 0.15 SL 256 2155

(Norbornene)

C«H7+ C7 H9 C1 ch2 ci 10.9 ± 0.15 SL 245 2155

(endo-5-Chloro-2-norbornene)

c«h+ c7 h9 ci CH,C1 10. 8 ± 0.15 SL 243 2155

(e;to-5-Chloro-2-norbornene)

C«H7+ C7 H9 C1 CH2 C1 10.25 ±0.15 SL 222 2155

(3-Chloronortricyclene)

cyclo-C5 H5 CH£ Heat of formation 218 kcal mol-1

c6 h8+ ch,=chch=chch=ch2 8.62 TC 248 136

C(jH8+ C«Hk 8.43 ± 0.05 SL 218* 2163

(1-Methylcyclopentadiene)

Cb H8+ Cb Hk 8.46 ±0.05 SL 219* 2163

(2-Methylcyclopentadiene)

CeHc»

Cb H8 C9 HiB n-C3 H7 ? 11.99± 0.05 EVD 220 1184,2028

(cis-Hexahydroindane)

c6 h+ C9 H,b rc-C3 H7 ? 12.07 ±0.04 EVD 222 1184,2028

Rrans-Hexahydroindane)

cyclo- CeHjo Heat of formation 199 kcal mol 1

CbHj+

0 ChH.o 8.945 ±0.01 PI 204 182,416

(Cyclohexene)

CbH+

0 C6 H10 8.72 PE 199* 1130

(Cyclohexene)

CeH^ Cb H10 10.29 PE 1130

(Cyclohexene)

C6 Hj+

0 C6 H,o 10.98 PE 1130

(Cyclohexene)

CeH+ C«H10 12.47 PE 1130

(Cyclohexene)

C«Hj+

0 Cb Hio 16.25 PE 1130

(Cyclohexene)

C«H+ CbHio 18.48 PE 1130

(Cyclohexene)

CeH^ CbHhi 8.85 ±0.09 SL 202 411

(Cyclohexene)

CeH+ CbH.b c2 h« 10.62 ±0.04 EVD 224 1145

(cis-l,2-Dimethylcyclohexane)

C6H+ C«Hi6 C2 Hb 10.87 ±0.08 EVD 228 1145

(trans-1 ,2-Dimethylcyclohexane)

CbH+ C9 Hib c3 h«? 10.79 ±0.03 EVD 210 1184,2028

(cfs-Hexahydroindane)

C6 H+ C9 Hib C3 Hb? 11.00 ± 0.02 EVD 215 1184,2028

(frarcs-Hexahydroindane)

CeHj, CioHis cis-C4 HH ? 10.89 ±0.02 EVD 212 1182, 1183

(cts-Decaline)

C«H+ CioHig trans-CiHn? 11.29 ±0.02 EVD 220 1182, 1183

Rrans-Decaline)

63
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-

*)

cyclo-C6 H^ Heat of formation 185 kcal mol 1

C6 H+ CfiHu 7.66 ±0.05 SL (a) 123

(Cyclohexyl radical)

C6 H+ C«Hn 7.75 TC 2184

(Cyclohexyl radical)

Calif, ChH12 H 11.66 SL 187* 123

(Cyclohexane)

CeH+ C7 H14 ch3 10.95 SL 183* 123

(Methylcyclohexane)

C«H+ C8 H16 c2 h. 11.06 ±0.02 EVD 189 1145

(cis-l,2-Dimethylcyclohexane)

CS H+ CsHie c2 h5 11.27 ± 0.02 EVD 192 1145

( trans- 1 ,2-Dimethylcyclohexane)

l-CeH/g Heat of formation 208 kcal mol -l

(CH3 )2 C=C(CH3 )J 175 kcal mol-l

cjclo-CeH^ 197 kcal mol -l

cb h+2 i-c8 h,2 9.45 ±0.02 PI 208* 1120

C6 H|9 i-c«h,2 9.46 ±0.02 PI 208* 182

Ch H|2 trans-2-CeWyz 9.16 198 2114

Cb H|., tran5-3-GiHi2 9.12 197 2114

C6 H+, (C2 IUC=CH2 9.21 199 2114

ChH|2 (CH3 )2 C=C(CH3 )2 8.30 PI 175* 168

ChH+2 (CH3 ) 2 C=C(CH3 >2 8.40 TC 178 136

Cb H|2 ChH12 10.45 SL 216 123

(Methylcyclopentane)

ChH+2 cb h12 10.28 TC 212 1352, 2020

(Methylcyclopentane)

ChH-2 c6 h, 2 9.88 ±0.02 PI 198* 182,416

(Cyclohexane)

ChH[„ cb h12 9.79 PE 196* 1130

(Cyclohexane)

C6 H+ C,;H, 2 11.33 PE 1130

(Cyclohexane)

Cb H;9 C«H12 12.22 PE 1130

(Cyclohexane)

C«H+, Ck H12 14.37 PE 1130

(Cyclohexane)

c6 h+2 cb h12 19.43 PE 1130

(Cyclohexane)

C« H|9 C6 H12 10.50 SL 213 123

(Cyclohexane)

CbH;2 ChH12 10.05 TC 202 473

(Cyclohexane)

ChH|2 c6 h12 10.06 TC 203 1352, 2020

(Cyclohexane)

c6h+ c6 h12 10.79 TC 219 136

(Cyclohexane)

ChH^ /j-CtHih CR, 10.875 ±0.02 PI 224 1120

C«H|2 CsH1b C2 R 11.17 ±0.02 EVD 204 1145

(cis-l,2-Dimethylcyclohexane)

C«H+2 CsH.h c2 r 11.25±0.04 EVD 204 1145

(trans -l ,2-Dimethylcyclohexane)

CB Hf2 n-CsHis C2 Hh 10.62 ±0.01 PI 215 1120

64
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) n-CgHjg Heat of formation 170 kcal mol-1

CeH+3 n-C7 Hi6 ch3 10.79 ±0.06 PI 171* 1120

C*>H+3 n-C7 Hifi ch3 10.7 ±0.1 PI 169* 2013

C6 H|3 n-CsHis c2 h3 10.705 ±0.01 PI 172 1120

/i-CfiH|4 Heat of formation 195 kcal mol -1

iso-CeH^ 192 kcal mol -1

(C2 H5 )2 CHCH+ 191 keal mol -1

C2 H5 C(CH3 )£ 188 keal mol-1

(CH3)2 CHCH(CH3)

4-2 189 keal mol-1

c6 h+4 n-C(i Hi4 10.18 PI 195* 182

c6 h+ n-CfiHu 10.12 TC 193 1439

c6 h+4 n-CfiHn 10.15 TC 194 1439

CfiH+ n-CfiH,4 10.40 TC 200 2038

ck h+4 n-CfiHn 10.41 TC 200 473

Ch H+4 n-CfiHu 10.41 TC 200 2038

c«h+4 n-C«Hi4 10.42 TC 200 1006

C(i H+4 n-CfiHn 10.46 TC 201 136

c«h+4 n-CfiHn 10.43 TC 201 1352 ch h+4 n-CfiH 14 11.09 TC 1352, 2020 c6 H|4 n-CfiHu 11.50 TC 1352, 2020

CfiH+4 n-CfiHu 11.67 TC 1352, 2020

ck h+4 «-CfiH,4 11.70 TC 1352, 2020

C«H+4 n-Cfi H,4 12.24 TC 1352, 2020

c«h+4 /i-CeHi4 12.64 TC 1352, 2020

c«h+4 n-CfiHj4 15.83 TC 1352, 2020

Cfi H+4 n-CfiH)4 17.13 TC 1352, 2020

c*h+4 n-CfiH,4 19.40 TC 1352,2020

Cfi H+4 n-CfiHu 22.57 TC 1352, 2020

ChH+4 n-CfiH]4 25.77 TC 1352, 2020

c«h+4 n-CfiHi4 28.07 TC 1352, 2020

c«H|4 i50-CfiH]4 10.12 PI 192* 182

ChH+4 i5o-CfjHi4 10.32 TC 196 1352, 2020

c«h+4 l50’C(jHi4 10.41 TC 198 136

c«h+4 iso-C(jHi4 10.45 TC 199 2038 c6 H|4 150-CbHi4 10.46 TC 199 2038

cs h+4 (QR^CHCHfi 10.08 PI 191* 182 c6 H|4 (C2 a>2CHCH3 9.81 TC 185 473

c«H|4 (C2 H5 )2 CHCH3 10.31 TC 197 1352, 2020

ChH|4 (QH^CHCH, 10.46 TC 200 136

c«h+4 (C2 H5 >2CHCH;i 10.49 TC 201 2038 ch H|4 (C2 H5 >2 CHCH3 10.51 TC 201 2038

ck h+4 C2 H3 C(CH3 )3 10.06 PI 188* 182

C«H+4 C2 HgC(CH! )3 9.93 TC 185 473

c«H|4 C.H.QCIU 10.18 TC 190 1352, 2020

c6 h+ (CH3)2 CHCH(CH3 )2 10.02 PI 189* 182

C«H+ (CH3 )2 CHCH(CH3 )2 10.13 TC 191 1352,2020

C«H + (CH3 )2 CHCH(CH3 )2 10.54 TC 201 2038

C«H+ (CH3)2 CHCH(CH3 )2 10.55 TC 201 136

CfiHj1; (CH3)2 CHCH(CH3 )2 10.56 TC 201 2038

65
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C7 HJ

(Biphenyl)

(C«Hs)2 20.85 + 0.2 EVD 1238

cyclo-C(jH5 CH£ Heat of formation 216 kcal mol 1 cyclo-C7 H| 209 kcal mol-1

c7 h+ c,h4 ch=ch2 8.44 SL 126

(Vinylcyclopentadienyl radical)

c7 h+ c«h5 ch2 7.76 ±0.08 SL 216* 69

(Benzyl radical)

c7 h+ c7 h7 6.240 + 0.01 S 209* 2189

(Cycloheptatrienyl radical)

c7 h7+ c7 h7 6.60 + 0.1 SL 217 68

(Cycloheptatrienyl radical)

c7 h+ c7 h- 6.41 TC 213 136

(Cycloheptatrienyl radical)

C7 H7+ CfiH.iCH.i H 11.80 cs 232 2109

(Toluene)

c7 h7+ c7 h8 H 10.73 SL 239 219

(Cycloheptatriene)

C7 H7+ C7 Hh H 10.1 + 0.2 SL 224 68

(Cycloheptatriene)

c7 h7+ c7 h8 H 10.68 VC 238 219

(Cycloheptatriene)

c7 h7+ C7 Hh H 10.46 CS 233 2109

(Cycloheptatriene)

c7 h7+ c7 h8 H 10.4 + 0.1 cs 231 2108

(Cycloheptatriene)

c7 h7+ c7 h8 H 10.45 ±0.1 SL 241 1122

(Spiroheptadiene)

c7 h+ c7 h8 H 9.75 EVD 2185

(Bicyclo(2-2-l)heptadiene-2,4)

c7 h+ c7 h8 H 9.6 CS 236 2109

(Bicyclo(2-2-l)heptadiene-2,5)

C7 H7+ c7 h8 H 9.88 SL 238 219

(Bicyclo(3-2-0)heptadiene-2,6)

C7 H+ C7 H8 H 9.66 VC 233 219

(Bicyclo(3-2-0)heptadiene-2,6)

c7 h7+ c7 h8 H 9.56 EVD 2185

(Quadricyclene)

c7 h7+ c7 h8 H 9.75 EVD 2185

(Quadricyclene)

C7 H7+ C7 Hj« h2 + h 13.37 SL 278 219

(1,3-Cycloheptadiene)

c7 h7+ c7 h10 h2 + h 13.6 ±0.3 LE 293 2155

(Norbornene)

C7 H7+ CH2=C(CH;i )C=CC(CH.()=CH2 ch:! 10.5 ±0.1 SL 277 1122

c7 h7+ c6 h5 c2 h5 ch3 11.2 ±0.1 SL 232 1122

(Ethylbenzene)

C7 H; Cfi H,C2 H, CH;J 11.25 ±0.1 NS 233 135

(Ethylbenzene)

C7 H7+ C6H4 (CH:! )2 CH;i 11.6 ±0.1 SL 238 1122

(m-xylene)

66
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

C7 H-f C«H|0 CH:t 10.0±0.1 SL 235 1122

(7-Methylcycloheptatriene)

C7 H^ CsHlO ch3 9.5 ±0.2 SL 223 68

(7-Methylcycloheptatriene)

C7 H7+ C„H,o ch:! 9.8±0.1 SL 237 1122

(1-Methylspiroheptadiene)

C7 H+ C8 H,o CH.( 9.8 ±0.1 SL 237 1122

(2-Methylspiroheptadiene)

C7 H7+ C8 Hio CH:i 9.7 ± 0.1 SL 236 1122

( 6-Methylspiroheptadiene)

C7 H7+ Ci h H30 11.82 ± 0.1 EVD 2153

(1-Phenyldodecane)

C7 H7+ C18 H30 12.05 ±0.1 EVD 2153

(3-Phenyldodecane)

C7 H7+ C19H32 12.21 ±0.1 EVD 2153

(7-Phenyltridecane)

C7 H7+ C28 H48 11. 83 ±0.1 EVD 2153

(1-Phenyleicosane)

C7 H+ C26 H4H 12.28 ±0.1 EVD 2153

(2-Phenyleicosane)

C7 H7+ C2 HH48 12.24 ±0.1 EVD 2153

(3-Phenyleicosane)

c7 h; C2HH46 12.33 ±0.1 EVD 2153

(4-Phenyleicosane)

C7 H7+ C26 H48 12.34±0.1 EVD 2153

(5-Phenyleicosane)

C7 H7+ C2HH46 12.60 ±0.1 EVD 2153

(7-Phenyleicosane)

C7 H; C2«H4b 12.09 ±0.1 EVD 2153

(9-Phenyleicosane)

C7 H7+ ChH5 CH2 ND2 nd2 11.7 ±0.1 PI 1160

(A,A^-d2 -Benzylamine)

C7 H7+ CbH5 SCH:! SH 12.0 SL 266 307

(Phenyl methyl sulfide) c7 h7+ c7 h9 ci HC1 + H 12.5 ±0.3 LE 281 2155

(endo-5-Chloro-2-norbornene)

c7 h7+ c7 h9ci HC1 + H 12.6 ±0.3 LE 284 2155

(ejco-5-Chloro-2-norbornene) c7 h; c7h9ci HC1 + H 12.2 ±0.3 LE 266 2155

(3-Chloronortricyclene)

C7H5D2

C7H5 D+ C6 H3 CD2 7.71 SL 0124

(a-d2 -benzyl radical)

67
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

cjcio-C6H5CHj Heat of formation 215 kcal mol-1

CJC/0-C7 HJ 240 kcal mol 1 bicyclo(2 • 2 • 1)-C7H£ 267 kcal mol-1

bicyclo(S • 2 • 0)-C7H£ 268 kcal mol-1

C7 H£ c6 h5 ch3 8.82 ± 0.01 PI 215* 158. (Toluene) 182,416

c7 h- c6h5 ch3 8.81 ± 0.02 PI 215* 1142,1166

(Toluene)

C7 Hg c6h5 ch3 8.82 PI 215* 1159

(Toluene)

c7 h- c6 h5 ch3 10.12±0.2 PE 1159

(Toluene)

c7 h- c6 h5ch3 8.82 PI 215* 168

(Toluene)

C7 HJ c6h5 ch3 8.80 ±0.1 RPD 215 2158

(Toluene)

C7 HJ c6 h5 ch3 9.2 ±0.1 RPD 2158

(Toluene)

C7 h; c6h5 ch3 9.5±0.1 RPD 2158

(Toluene)

c7 hj c6h5 ch3 9.23 ±0.05 SL 225 2163

(Toluene)

c7 h- c«h5 ch3 9.18 SL 224 1066

(Toluene)

c7 h- c6h5 ch3 9. 12 ±0.05 cs 222 2025

(Toluene)

c7 h- ChH5 CH3 9.20 ±0.05 cs 224 383

(Toluene)

c7 h+ c„h5 ch3 9.15±0.1 cs 223 381

(Toluene)

c7 h- c«h5 ch3 9.03 cs 220 2109

(Toluene)

c7 h8+ c«h5 ch3 9.01 TC 220 136

(Toluene)

c7 h- c7 h« 8.55±0.1 SL 241* 68

(Cycloheptatriene)

C7 HJ c7 h8 8.52 SL 240* 219

(Cycloheptatriene)

c7 hj C7 H* 8.47 VC 239 219

(Cycloheptatriene)

C7 HJ C7 Hh 8.51 CS 240* 2109

(Cycloheptatriene)

C~Hg C7 Hh 7.89 TC 225 136

(Cycloheptatriene)

c7 hj c7 h* 8.60 EVD 2185

(Bicyclo(2 • 2 • l)heptadiene-2,4)

c7 hj C7 Hh 8.67 CS 267* 2109

(Bicyclo(2 • 2 • l)heptadiene-2,5)

c7 hj c7 h„ 8.92 SL 268* 219

(Bicyclo(3 • 2 • 0)heptadiene-2 , 6 ) c7 h^ C7 Hh 8.70 EVD 2185

(Quadricyclene)

c7 h; C7 Hk 8.85 EVD 2185

(Quadricyclene)

68
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c7 h8+ c7 h10 h2 10.8 SL 271 219

(1,3-Cycloheptadiene) c7 h+ c7 h10 h2 9.4 SL 247 219

(Bicyclo(3 • 2 • 0)heptene-6)

C7 H+ C18 H30 10.75±0.1 EVD 2153

(1-Phenyldodecane)

C7 H8 C26 H46 1 1 .35 ±0.1 EVD 2153

(1-Phenyleicosane)

c7 h^

2

C7 H+ 2 c6h5 ch3 24.5 ±0.2 FDP 577 212

(Toluene)

C7 H^

C7 H+ 3 c6h5 ch3 42 ±5 NRE 981 212

(Toluene)

c7hj

C7 Hg C7 Hio H 11.30 SL 231 219

(1,3-Cycloheptadiene)

C7 H|) C7 H10 H 10.67 SL 224 219

(Bicyclo(3 • 2 • 0)heptene-6) c7 h+ c7 h10 H 11.5 + 0.15 SL 244 2155

(Norbornene)

c7 h+ c7 h9 ci Cl 11.0 + 0.15 SL 248 2155

(endo-5-Chloro-2-norbornene) c7 h+ c7 h9 ci Cl 11.1 ±0.15 SL 250 2155

(exo-5-Chloro-2-norbornene)

c7 h+ c7 h9 ci Cl 10.7 ±0.15 SL 233 2155

(3-Chloronortricyclene)

CyHjo (1,2-Dimethylcyclopentadiene) Heat of formation 204 kcal mol- 1 CtH^q (5,5-Dimethylcyclopenitadiene) 206 kcal mol- 1 C7Hf0 (1,3-Cycloheptadiene) 219 kcal mol- 1 C7 H|0 (Bicyclo(3 • 2 • 0)heptene-6) 246 kcal mol- 1 C7HI0 (Norbornene) 237 kcal mol- 1 C7 Hjq C7 Hjo 8.1 ±0.1 SL 204* 2163

(1,2-Dimethylcyclopentadiene)

c7 h+ C7 H,o 8.22 ±0.05 SL 206* 2163

(5,5-Dimethylcyclopentadiene) c7 h,+

0 c7h10 8.40 SL 216* 219

(1 ,3-Cycloheptadiene)

c7h+ c7 h10 8.69 VC 223* 219

(1,3-Cycloheptadiene)

C7 H1+

0 c7 h10 9.37 SL 246* 219

(Bicyclo(3-2-0)heptene-6)

C7Hj+

0 c7 h10 9.38 VC 246* 219

(Bicyclo(3-2-0)heptene-6)

C7 H1

h0 C7 Hio 8.95±0.15 SL 237* 2155

(Norbornene)

69
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -

*) C7 H+

c7 h+ c9 h1(; C2 H5 11.71 ±0.05 EVD 211 * 1184, 2028

(cj's-Hexahydroindane)

C7H + CiiHit; C2H5 11.80 ±0.05 EVD 213* 1184,2028

(/rarcs-Hexahydroindane)

C7 HI2 (4-MethylcycIohexane) Heat of formation 198 kcal mol 1

c7 h+ c7 h12 8.91 ±0.01 PI 198* 182

(4-Methylcyclohexene)

C7H+ CyHiti c2 h4 10.96 ±0.03 EVD 206 1184,2028

(cis-Hexahydroindane)

c7 h+ Ch H,„ C2 H4 11. 16 ±0.03 EVD 211 1184,2028

prans-Hexahydroindane)

C7 H+ CkiHih C:! Hh 10.72 ±0.02 EVD 202 1182, 1183

(cis-Decaline)

C7 H^ C10 Hi« c:! h« 11.04 ±0.02 EVD 206 1182, 1183

prans-Decaline)

cyclo-C6 Hi0CH^ Heat of formation 174 keal mol-1

C7 H+ C«Hi6 CH;i 10. 78 ± 0.02 EVD 174* 1145

(ct5 -l,2-Dimethylcyclohexane)

C7 H+ C«Hi6 CH, 10.84 ±0.02 EVD 174* 1145

prans-l,2-Dimethylcyclohexane)

cjc!o-C6 HiiCHJ Heat of formation 190 keal mol 1

C7 H+ C7 H]4 9.85 ±0.03 PI 190* 182

(Methylcyclohexane)

C7H+ C7 Hj 4 10.19 SL 198 123

(Methylcyclohexane)

C7 H+ C7 H,4 9.91 TC 192 1352, 2020

(Methylcyclohexane)

c7 h+ C7 Hu 10.32 TC 209 1352, 2020

(Cycloheptane)

C7H+ C7 H]4 10.72 TC 219 136

(Cycloheptane)

n-C7H^5 Heat of formation 164 kcal mol 1

C7 H+ n-CsHis ch3 10.705 ±0.075 PI 164* 1120

C7 H+ (C:i H7 ) 2 CH 7.56 TC 168 1006

n-C7 H^6 Heat of formation 183 kcal molh1

C7H + n-C7 Hie 9.90 ±0.05 pi 183* 2013

C7H+ rc-C 7 H, 6 10.08 pi 188 182

c7 h+ n-C 7 Hi (i 10.20 PE 190 1130

CtH + n-C 7 Hi« 14.38 PE 1130

C7H+ n-C7 Hi6 15.18 PE 1130

C7H + n-C7 Hi6 18.63? PE 1130

c7 h1+6 n-C7 H1B 19.86? PE 1130

70
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation Ref.

(kcal mol -1

)

CtH + 7l-C 7 Hi6 10.05 TC 187 1439

c7 h+ n-C 7 Hi 6 10.07 TC 187 1439

c7 h+ n-CrHie 10.33 TC 193 473

c7 h+ n-C 7 Hi<j 10.33 TC 193 1006

c7 h+ n-C 7 H16 10.34 TC 194 1352, 2020

c7 h+ R-C 7 H16 10.90 TC 1352, 2020

C7 Ht6 U-C7 Hi 6 11.34 TC 1352, 2020

c7 h+ n-C7 Hi<; 11.57 TC 1352, 2020

c7 h+ n-C7 Hi6 11.68 TC 1352, 2020

C7H+ n-C7 Hi6 11.70 TC 1352, 2020

c7 hj, 71-C 7 Hih 12.24 TC 1352, 2020

C7 Htfi n-C 7 Hie 12.64 TC 1352, 2020

c7 h1+6 n-C7 Hi6 15.72 TC 1352, 2020

c7 h+ n-C 7 H]6 16.74 TC 1352, 2020

c7 H|6 n-C7 Hi6 18.49 TC 1352, 2020

c7 H|6 n-C7 Hie 21.00 TC 1352, 2020

c7 H|6 n-C7 Hie 23.89 TC 1352, 2020

c7 H|6 n-C7 Hie 26.50 TC 1352, 2020 c7 h+

6 n-C7 Hie 28.27 TC 1352, 2020

c7 H|6 n-C7 Hie 10.34 TC 194 2038

c7 H|6 n-C7 Hie 10.35 TC 194 2038 c7 h+

6 n-C7 H]6 10.41 TC 195 136

C8 HJ

ChH+ CioH8 18.07 ±0.05 SL 2112

(Naphthalene)

C«H+ CioH8 16.3 ±0.15 SL 2112

(Azulene)

cyclo-C6 H5 C =CH+ Heal of formation 279 kcal mol- 1

ChH- C«H.,C=CH 8.815 ±0.005 PI 279* 182

(Phenylacetylene)

C«H+ QHsOCH 9.10 TC 286 136

(Phenylacetylene)

ChHs h2 ? 10.26 ± 0.21 EVD 385 2105

(Cubane)

C«H+ CioH8 c2 h2 ? 15.4±0.10 SL 334 2112

(Naphthalene)

C«H+ CioH« c2 h2 ? 13.6±0.10 SL 332 2112

(Azulene)

ChH- ( C« H.-, )2 2C2 H2 ? 18. 10 ±0.05 SL 349 1238

(Biphenyl)

C«H+ (CiiHsiiC'j CfilL? 17.8±0.1 SL 346 1238

(Diphenylacetylene)

ChH|

ChH+ ChHs H 9.50 ±0.11 EVD 316 2105

(Cubane)

71
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

CgH£ (Styrene) Heat of formation 232 kcal mol-1

CgH^ (Cyclooctatetraene) 255 kcal mol-1

CgH^ (Cubane) 350 kcal mol-1

C8 H+ c6 h5 ch=ch2 8.47 ±0.02 PI 232* 182

(Styrene)

c8 h+ c6 h3 ch=ch2 9.00 SL 244 1066

(Styrene)

C8 H+ C8 H8 7.99 ±0.02 PI 255* 182

(Cyclooctatetraene)

C8 H8 C8 H8 8.04 PE 256* 1130

(Cyclooctatetraene)

C8 Hg C8 H8 9.49 PE 1130

(Cyclooctatetraene)

c8 h8+ c8 h8 10.84 PE 1130

(Cyclooctatetraene)

C8 Hg C8 H8 11.49? PE 1130

(Cyclooctatetraene)

C8 H+ C8 H8 12.09 PE 1130

(Cyclooctatetraene)

C8Hg C8H8 14.49 PE 1130

(Cyclooctatetraene)

c8h+ c8 h8 16.44? PE 1130

(Cyclooctatetraene)

c8 h+ c8 h8 17.69? PE 1130

(Cyclooctatetraene)

c8 h+ c8 h« 18.56? PE 1130

(Cyclooctatetraene)

c8 hj c8 h« 8.63±0.15 CS 270 381

(Cyclooctatetraene)

C8 H+ C8 Hs 8.74±0.15 EVD 350* 2105

(Cubane)

C8 H+ C26 H46 12.2 ±0.1 EVD 2153

(1-Phenyleicosane)

m

6 H4CH3 CH| Heat of formation 206 kcal mol 1 p-c6 h4 ch3 ch+ 202 kcal mol 1 C8 H+ C6 H4CH,CH2 7.65 ±0.03 SL 206* 69

(m-Methylbenzyl radical)

C8 H+ C«H4 CH:i CH2 7.65 TC 206 136

(m-Methylbenzyl radical)

C8 H+ Ct; H4 CH;i CH2 7.46 ±0.03 SL 202* 69

(p-Methylbenzyl radical)

C8 H+ C6 H4 CH3CH2 7.56 TC 204 136

(p-Methylbenzyl radical)

C8 H+ CH2=C(CH3)C=CC(CH;! )=CHt 2 H 10.4 ±0.1 SL 256 1122

C8 H+ Ck H5 C2 H5 H 11.4 ± 0.1 SL 218 1122

(Ethylbenzene)

c8 h+ c8 h10 H 11.0 ±0.1 SL 239 1122

(7-Methylcycloheptatriene)

c8 h; C8 H,o H 9.9 ±0.1 SL 220 1122

(1-Methylspiroheptadiene)

C8 H+ C8 Hio H 9.9± 0.1 SL 220 1122

(2-Methylspiroheptadiene)

C8 H+ C8 H,o H 10.65 ±0.1 SL 239 1122

(6-Methylspiroheptadiene)

72
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-- 1 )

C«H+ ChRCRQR CR 11.2 ±0.1 SL 224 1122

(p-Ethyltoluene)

ChH+ CBH4 CD3 C2 H5 CDs 11.2 ± 0.1 SL 2144

(p-Methyl-c^-ethylbenzene)

C8 H+ C«H4 CR3 CH2 CD3 cd3 11.2 ± 0.1 SL 2144

(p-Ethyl-/6-e(3 -toluene)

C8 R C2B H46 10.83 ±0.1 EVD 2153

(2-Phenyleicosane)

c8 r C26R« 1 1 . 28 ± 0.1 EVD 2153

(3-Phenyleicosane)

cyclo-C6 H5 C2 H^ Heat of formation 209 kcal mol-1

o-C6 H4(CH3)£ 202 kcal mol-1

m-C6 H4 (CH3 )^ 202 kcal mol-1

p-C6H4(CH3)J 199 kcal mol-1

7-cyclo-CiR7CHJ 231 kcal mol-1

1 -spiro-C7 H7 CH£ 229 kcal mol-1

2-spiro-C7 H7 CHj 230 kcal mol-1

6-spiro-C7H7 CHj 239 kcal mol-1

c8h;0 CH2=C(CH,( )C=CC(CH3)=CH2 8.95 ±0.1 SL 275 1122

CsH+o c«h5 c2 h5 8.76 ±0.01 PI 209* 182

(Ethylbenzene)

CbH+ C^RlCRfe 8.555 PI 202* 168

(o-Xylene)

CsH+ CB H4 (CH3 >2 8.56±0.01 PI 202* 182,416

(o-Xylene)

CkH + CfiHdCRb 8.56 ±0.02 PI 202* 1142,

(o-Xylene) 1166, 1159

CsH+0 Ct;H4 (CH3 )2 9.86 ±0.2 PE 1159

(o-Xylene)

C.HJ, C(J H4( CH;i )*2 8.88 ±0.05 SL 209 2163

(o-Xylene)

ChH + CB H4 (CH3 >2 9.04 SL 213 1066

(o-Xylene)

CbH+ Cb H4 (CR} )2 8.76 TC 207 136

(o-Xylene)

ChH + ChR(CH3 >2 8.56 ±0.01 PI 202* 182,416

(m-Xylene) c8 h+ C6 H4 (CH3)2 8.59 ±0.02 PI 202* 1142,1166,

(m-Xylene) 1159

C8H+ CbH4 (cA 9.89 ±0.2 PE 1159

(m-Xylene)

C8 H+ CeRlCR), 8.56 PI 202* 168

(m-Xylene)

ChHj, CB H4 (CH3 )2 8.88 ±0.05 SL 209 2163

(m-Xylene)

CbHJ, C6 H4 (CH3 )2 8.85 ±0.1 SL 208 1122

(m-Xylene)

CbH+ cbh4 ( ch3 >2 9.05 SL 213 1066

(m-Xylene)

CbH+ C6 H4 (CH3 ) 2 8.77 TC 206 136

(m-Xylene)

73
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -

')

C«H+, C8 H4 (CH;|)2 8.445 ±0.01 PI 199* 182,416

(p-Xylene)

C8 HJo Cfi H4 (CH:i )2 8.445 PI 199* 168

(p-Xylene)

C*Ht0 C6 H4(CH:i )2 8.44 ±0.02 PI 199* 1142,

(p-Xylene) 1166, 1159

c8 h+0 Ck H4 (CH:! ) 2 9.74±0.2 PE 1159

(p-Xylene)

C«H|0 Cfi H4(CH:i )2 8.78±0.05 SL 207 2163

(p-Xylene)

CnHto C«H4 (CH;i)2 8.99 SL 212 1066

(p-Xylene)

ChH|0 C<;H4(CH:i)2 8.83 TC 208 136

(p-Xylene)

C«H+0 C(iH4 (CH:j)2 8.88 TC 209 2194

(Xylene)

C«H+ CsHio 8.39 ±0.1 SL 231* 1122

(7-Methylcycloheptatriene)

ChH|0 ChH„, 8.02 ±0.1 SL 229* 1122

(1-Methylspiroheptadiene)

LhH;0 C«Hio 8.07 ±0.1 SL 230* 1122

(2-Methylspiroheptadiene)

c8 h+ CsHio 8.40 ±0.1 SL 239* 1122

(6-Methylspiroheptadiene)

c8 Hr2 CnHt2 c8 h12 7.96 ±0.05 SL 194* 2163

(1,2,3-Trimethylcyclopentadiene)

C8 H+ c8 hI2 8.00 ±0.1 SL 193* 2163

(1,5,5-Trimethylcyelopentadiene)

C8 H+ ChH.,CH=CH2 8.93 ±0.02 PI 224* 182

(4-Vinylcyclohexene)

cis-l,2-cjc/o-C6 Hio(CH3 )^ Heat of formation 191 kcal mol-1

trans-1 ,2-cycio-C6 Hio(CH3 )£ 189 kcal mol 1

C«H+fi C8 Hi6 10.08 ±0.02 EVD 191* 1145

(cis-l,2-Dimiethylcyclohexane)

C*H+ C8 Hj6 10.08 ±0.03 EVD 189* 1145

(<ra/is-l,2-Dimethylcyclohexane)

C«H+ c8 h16 10.06 TC 202 1352, 2020

(Cyclooctane)

c8 h,« 10.67 TC 216 136

(Cyclooctane)

iso-C4H9C(CH3)J Heat of formation 174 kcal mol-1

C«H|S n-C8 H] 8 10.03 TC 181 1439

ChH|s n-C8 Hi 8 10.25 TC 187 473

CsH|k n-C 8 H ]8 10.27 TC 187 1006

C8 H|8 n-C8 H is 10.28 TC 187 1352,2020

n-C8 H18 10.76 TC 1352, 2020

CsH;8 n-C8 H| 8 11.20 TC 1352, 2020

CsH|8 n-CsHis 11.47 TC 1352, 2020

c8 h;8 n-CsHis 11.62 TC 1352, 2020

74
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

)

c8 h+

8 n-C8 Hi8 11.69 TC 1352, 2020

c8 h+

8 n-C8 H18 11.70 TC 1352, 2020

c8 H|8 n-C8 Hi 8 12.24 TC 1352, 2020

c8 h+

8 n-C8 Hi 8 12.64 TC 1352, 2020

ChHJh n-C8 H]8 15.65 TC 1352, 2020

c8 h+

8 n-C8 H] 8 16.47 TC 1352, 2020

c8 h;8 n-C8 Hi 8 17.86 TC 1352, 2020

c«h+

8 n-C8 Hi 8 19.87 TC 1352, 2020

CxH+

8 n-C8 Hi 8 22.35 TC 1352, 2020

ChH+

8 n-C8 Hi 8 24.87 TC 1352, 2020

c8 h+

8 n-C8 Hi 8 27.00 TC 1352, 2020

c8 h+

8 n-C8 Hi 8 28.41 TC 1352, 2020

CsH+

8 n-C8 Hi8 10.29 TC 187 2038

c8 h+

8 n-C8 Hi 8 10.30 TC 188 2038

c8 h+

8 n-C8 H]8 10.38 TC 190 136

C8 H{8 iso-C4 H,C(C}hh 9.86 PI 174* 182

c8 H[8 Z50-C4H9 C (CH;j )3 9.91 PE 175 1130

ChH+

8

1so-C4 H9 C(CH3)3 11.95? PE 1130

c8 h+

8

t 5 o-C4H9 C(CH3 h 14.09? PE 1130

c8 h;8 iso-CiH9 C(CH3 )3 19.74? PE 1130

c9 hj

C9 H+ (C8 H5)2C2 cyclo-C5 H5 ? 21.3 ±0.2 SL 1238

(Diphenylacetylene)

c9H|

c9 h7+ c6 h5 chc=ch 7.69 TC 269 136

(y-Phenylpropargyl radical)

c9 h7+ c9 h7 8.35 SL 126

(Indenyl radical)

c9 h+ (C6 H5 >2 ch2 c=ch? 16.08 ±0.05 SL 335 1238

(Biphenyl)

c9 h7+

(

C

8 IL> )2 C3 c5 h3 ? 17.5 ±0.1 SL 1238

(Diphenylacetylene)

c9 h7+(

C

6 H3 )2 0 C3H30? 16.68 ±0.15 SL 1237

(Phenyl ether)

CgHg (Indene) Heat of formation 246 kcal mol 1

c9 h+ CbHsOCCH, 8.79 TC 269 136

(Methylphenylacetylene)

C«H8+ c9 h« 8.81 SL 246* 126

(Indene)

c9 h8+ c9 h8 8.63 TC 242 136

(Indene)

C»Hf0 C9H+ C6H5 C(CH3)=CH2 8.35 ±0.01 PI 220* 182

(a-Methylstyrene)

75
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-1

) c9h+

C9 H+ C6 H3 (CH3 )2 CH2 CD3 cd3 10.5 SL 2144

(2,5-Dimethylethyl-/3-d:rbenzene)

C9 H+ C6 H3 ( CHi >2 CH2 CD.! CD:i 10.5 SL 2144

(3,4-Dimethylethyl-/Ld3 -benzene)

C9 H+ C«H3 (CH3 >2 CH2 CD3 cd3 10.5 SL 2144

(3,5-Dimethylethyl-/3-d3 -benzene)

CbH+j c18h30 10.42 ±0.1 EVD 2153

(3-Phenyldodecane)

CoH+j C2«H4« 10.69± 0.1 EVD 2153

(3-Phenyleicosane)

C9 H+ C2eH4« 11.36 =t 0.1 EVD 2153

(3-Phenyleicosane)

c9 h8 d+

C9 H*D3+ C«H3(CH.! >2 CH2 CD;! ch3 10.5 SL 2144

(2,5-Dimethylethyl-/3-^{ -benzene)

C9 H*D+ Cb H3 (CH3 >2 CH2 CD3 ch3 10.5 SL 2144

(3,4-Dimethylethyl-j8-d3 -benzene)

C9 H8 D+ C6 H3 (CH3 )2 CH2 CD3 ch3 10.5 SL 2144

(3,5-Dimethylethyl-/3-d3 -benzene)

cjc/o-C6H5(n-C3 H7) + Heat of formation 203 kcal mol-1

cjcio-C6H5(iso-C3H7) + 210 kcal mol-1

1 ,2 ,3-cycJo-C6 H3 (CH3 )J 193 kcal mol-1

1 ,2 ,4-cycJo-C6H3(CH3) £ 187 kcal mol-1

1 ,3,5-cyc/o-C6 H3 (CH3 )£ 190 kcal mol-1

c9h+ c6h5 c3 h7 8.72 ±0.01 PI 203* 182, 416

(n-Propylbenzene)

C9 H+ C(i H,C:! H7 8.69 ±0.01 PI 201* 182,416

(Isopropylbenzene)

C9 H+ CMCUsh 8.48 PI 193* 168

(1,2,3-Trimethylbenzene)

C9 H+ C6 H3 (CH3 )3 8.67 ±0.05 SL 198 2163

(1,2,3-Trimethylbenzene)

C9 H+ Cb H;s ( CHa )3 8.49 TC 193 136

(1,2,3-Trimethylbenzene)

C9 H+ CbH3 (CH3 )3 8.27 PI 187* 168

(1,2,4-Trimethylbenzene)

C9 H+ CbH3 (CH3 )3 8.55 ±0.05 SL 194 2163

(1,2,4-Trimethylbenzene)

C9H+ CeHjlCHah 8.40 ±0.01 PI 190* 182

(1 ,3,5-Trimethylbenzene)

C9 Hj+

2 CbH3 (CH3 )3 8.39 ±0.02 PI 190* 416

(1,3,5-Trimethylbenzene)

C9 H+ C6 H3 (CH3 )3 8.41 ±0.02 PI 190* 1142,1159,

(1,3,5-Trimethylbenzene) 1166

C9 H+ C,H,(CH,h 8.39 PI 190* 168

(1,3,5-Trimethylbenzene)

C9 H+ C6 H3 (CH3 )3 9.71 ±0.2 PE . 1159

(1,3,5-Trimethylbenzene)

C9 H+ CMCH,h 8.64 ±0.05 SL 195 2163

(1,3,5-Trimethylbenzene)

C9 H+ CMCHs)* 8.74 SL 198 1066

(1,3,5-Trimethylbenzene)

76
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation Ref.

(keal mol-*)

c9 h+

C9 H+ C«H14 7.8±0.1 SL 181* 2163

(1,2,3,4-Tetramethylcyclopentadiene)

c9 h+ c9 h14 7.84 ±0.05 SL 182* 2163

(1,4,5,5-Tetramethylcyclopentadiene)

CgHjg

CgHjg C9 H16 10. 13 ±0.03 EVD 200* 1184, 2028

(cts-Hexahydroindane)

c9 h+

6 c9 h16 10. 18 ±0.03 EVD 201 * 1184, 2028

Rrans-Hexahydroindane)

c9h2+o C, H+() n-Cu H'2o 10.02 TC 176 1439

C9 H+

0 n-C9 H20 10.22 TC 181 1006

C9 H+

0 n-C9 H20 10.23 TC 181 1352, 2020

C9 H.70 n-C9 H2o 10.26 TC 182 2038

C9 H+ h-C9 H20 10.27 TC 182 2038

C9 H.+0 n-C9 H20 10.36 TC 184 136

CiqH^ Heat of formation 409 keal mol -1

CioHg C10 H« H, 16.2±0.15 SL 407* 2112

(Naphthalene)

CmHg CioHk h2 14.7 ± 0. 10 SL 411* 2112

(Azulene)

CioHg (C6 H5 )2 C2 2C2 H2 1 8.23 ±0.1 SL 411 1238

(Diphenylacetylene)

C.oHgt H14 H10 2C,H2 20.9 ± 0.3 SL 421 1238

(Phenanthrene)

Ci0 H| Heat of formation 339 keal mol -1

Ch,H7+ c10 h8 H 15.4±0.10 SL 336* 2112

(Naphthalene)

C,oH7+ CioHh H 14.0±0.10 SL 343* 2112

(Azulene)

CioH£ (Naphthalene) Heat of formation 220 keal mol-1

CioH£ (Azulene) 243 keal mol -1

110 H+ CioHh

(Naphthalene)

8.12 ± 0.01 PI 220* 182, 416

ioHg Ci 0 H«

(Naphthalene)

8.14±0.02 PI 221 * 1166

ioHg CioHh

(Naphthalene)

8.26 ±0.05 SL 223 2112, 413

ioHg CioHh

(Naphthalene)

8.15 TC 221 1064

- 10 H+ i.ioHn (Naphthalene)

8.63 TC 232 136

77

323-656 0- 69—6
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C10 H+ CioH8 7.431 ± 0.006 S 244* 1420

(Azulene)

C10 H+ CioHh 7.412 S 243* 1459

(Azulene)

C10 H+ Ci 0 H8 7.72 ±0.05 SL 251 2112

(Azulene)

C10 H+ C.oHh 7.4 CTS 243 2037

(Azulene)

c10 h8+ Cio Hh 7.5 CTS 245 2037

(Azulene)

C10 H+ CioHh 7.43 TC 244 1315

(Azulene)

CioH8 CioH8 8.32 TC 264 136

(Azulene)

c10 h8+ (CeH.5)2 C2 H2 14.81 ±0.05 SL 327 1238

(Biphenyl)

CioH^ 2 (Naphthalene) Heat of formation 557 kcal mol-1

C10 H+ 2 CioHh 22.8 ± 0.2 FDP 559* 212

(Naphthalene)

C, 0 H+ 2 CioHh 22.7 NS 556* 413

(Naphthalene)

C10HJ3

C,„H8

3 CioHh 40 ±5 NRE 955 212

(Naphthalene)

C10H^3

Ci 0 H,+

3 GjHjCisHyCH. 7.42 ±0.1 SL 188* 69

(p-Isopropylbenzyl radical)

C10 H+ CihHho 11.07 ±0.1 EVD 2153

(1-Phenyldodecane)

CioH.t, C20 H40 10 . 86 ± 0.1 EVD 2153

(1-Phenyleicosane)

C10 H+ C-ioH^o 10.58±0.1 EVD 2153

(4-Phenyleicosane)

78
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal moL ‘) cyclo-CeH^in-C^^ Heat of formation 197 kcal mol--1 cyclo-C6H5 (sec~C4 H9) + 196 kcal mol" 1 cyclo-C6 H5(tert-C4 li9) + 193 kcal mol- 1 1 ,2 ,3 ,5-cycJo-C6 H2 (CH3 ) J 185 kcal mol- 1 l,2,4,5-cyc<o-CBH2(CH3)J 174 kcal mol- 1

C10H+ c6 h5 c4 h9 8.69±0.01 PI 197* 182, 416

(rc-Butylbenzene)

C10H+ c6 h5 c4 h9 8.68 ±0.1 PI 196* 182

(sec-Butylbenzene)

C10 H+ c6 h5 c4 h9 8.68± 0.01 PI 193* 182

(tert-Butylbenzene)

C10H + C6 H2 (CH3 )4 8.47 ±0.05 SL 185* 2163

(1,2,3,5-Tetramethylbenzene)

C10 H+ C6 H2 (CH3 )4 8.025 ±0.005 PI 174* 182

(1,2,4,5-Tetramethylbenzene)

C10 H+ C6 H2 (CH3 )4 8.05 ±0.02 PI 175* 1142,

(1,2,4,5-Tetramethylbenzene) 1159, 1166

C10 H+ C6 H2 (CH3 )4 8.03 PI 174* 168

( 1 ,2,4,5-Tetramethylbenzene)

C10 H+, C6 H2 (CH3)4 9.35 ±0.2 PE 1159

(1,2,4,5-Tetramethylbenzene)

CioH^4 C6 H2 (CHs)4 8.50 ±0.05 SL 185 2163

(1,2,4,5-Tetramethylbenzene)

c10h+6 C10 H+ C10 H16 7.77 ±0.05 SL 173 2163

(1,2,3 ,5 ,5 and 1,2,4,5,5-Pentamethylcyclopentadiene mixture)

C10H+ C10 H16 8.07 PE 1130

(a-Pinene)

CioH+6 C10 H16 9.25 PE 1130

(a-Pinene)

CioH+6 C10 H16 11.43 PE 1130

(a-Pinene)

CioH+g C10 H16 13.12 PE 1130

(a-Pinene)

C10 H+ C10H16 14.53 PE 1130

(a-Pinene)

CioH+g C10 H16 15.74? PE 1130

(a-Pinene)

CioH+g C10 H16 18.57? PE 1130

(a-Pinene)

c10 h+8 c10h+8 C10 H18 9.61 ±0.02 EVD 181* 1182, 1183

(cis-Decaline)

C10H+ C10 H18 9.61 ±0.02 EVD 178* 1182, 1183

(trans-Decaline)

79
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol"*)

C10H22

C10H+ n-Ci 0H22 9.95 TC 170 1439

CioH;^ n-C I0H22 10.19 TC 175 473

CioH^ n-Ci 0 H22 10.19 TC 175 1006

C10H2+ n-Ci 0 H22 10.20 TC 176 1352. 2020

C10 H+ n-Ci 0 H22 10.24 TC 176 2038

CioH^2 n-CioH22 10.25 TC 177 2038

C10HJ2 n-CioH22 10.33 TC 179 0136

CnHj

CnH^ (C 6 H5 ) 2 C2 ch2 c=ch? 17.52 ±0.1 SL 428 1238

(Diphenylacetylene)

CnH+ C14 H10 ch2 c=ch? 21.1 ± 0.3 SL 459 1238

(Phenanthrene)

CtlHg

C„H+ C10 H7 CH2 7.35 ±0.1 SL 71 (1-Naphthylmethyl radical)

Cn H+ C10 H7 CH2 7.56 ±0.05 SL 69, 71 (2-Naphthylmethyl radical)

CnHg (C6 H5 ) 2 0 CO + H 14.02 ±0.05 SL 315 1237

(Phenyl ether)

CnHg (C6Hs)2 C03 13.90± 0.05 SL 1237

(Diphenyl carbonate)

CiiH|0 (Methylnaphthalene) Heat of formation 209 kcal mol-1

CnH+

10 Cn Hio 7.96 ± 0.01 PI 209* 182, 416

(1 -Methylnaphthalene)

ChH+jo CiiH 10 8.41 TC 219 136

(1 -Methylnaphthalene)

CnH+

10 CnHio 7.955 ±0.01 PI 209* 182

(2-Methylnaphthalene)

C„H% CnHio 8.48 TC 221 136

(2-Methylnaphthalene)

C,,H% (C6 H5 )2 0 CO 12.56 ±0.08 SL 333 1237

(Phenyl ether)

C„H% (C«H5 )2 C03 co+co2 12.41 ±0.1 SL 321 1237

(Diphenyl carbonate)

CuH;5 C1 1 H - C-ioHio 10.43 ±0.1 EVD 2153

(5-Phenyleicosane)

cyclo-C6H(CH3 )£ Heat of formation 155 kcal mol-1

CnHjg C6 H(CH3 )5 7.92 ±0.02 PI 155* 1142, 1166

(Pentamethylbenzene)

C,,H+

16 C6 H(CH3 )5 7.92 PI 155* 168

(Pentamethylbenzene)

Ci,H+

16 C6 H(CH3 )5 8.30 ±0.05 SL 164 2163

(Pentamethylbenzene)

80
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

CnHfc

CllH+

18 C11H18 7.74 ±0.05 SL 165* 2163

(Hexamethylcyclopentadiene)

CnU24 C,,H+24 /1 -C 11 H24 9.93 TC 164 1439

c12 hj

C12 H7 ( Ch H5 )2 C2 C2 H2 +H 17.46 ± 0.06 SL 395 1238

(Diphenylacetylene)

Ci2H"y C14H10 C.H2 +H 19.63 ±0.05 SL 394 1238

(Phenanthrene)

C12 Hj

C^H'g C12 Hh 8.15 TC 348

(Biphenylene) c12 h+

8 c12 h8 8.73 TC 136

(Acenaphthylene)

C12 H+

8 (C6 H5 >2 h2 16.89 ±0.08 SL 429 1238

(Biphenyl)

C12 H+

8 (C6 H5)2C2 c2 h. 15.58 ±0.05 SL 404 1238

(Diphenylacetylene)

C) 2 H+

8 ChHio c2 h2 16.63 ±0.05 SL 377 1238

(Phenanthrene)

Ci 2 H 8 (C6 H5 >2 CO co+h2 ? 17.48 ± 0.12 SL 442 1237

(Benzophenone)

c12 hj2

C^H'g2 (CnHsh h2 22 . 0 ± 1.0 NS 547 1238

(Biphenyl)

CuH'g2 (CeHi)2C2 c2 h2 20.5 ±0.1 NS 518 1238

(Diphenylacetylene)

c, 2 hj

C^H'y (C«H5 )2 H 14.36 ±0.05 SL 319 1238

(Biphenyl)

C12 H+ ( Cg H5 )2 C0 CO+H? 15.28 ±0.05 SL 339 1237

(Benzophenone)

Ci2 H|o (Biphenyl) Heat of formation 230 kcal mol 1

Ci 2 HjQ (CeH5 )2 8.27 ±0.01 PI 230* 182

(Biphenyl) c12 h% (ChH5 >> 8.96 ±0.05 SL 246 1238

(Biphenyl) c12 h% (C6 H3 >2 8.53 TC 236 348

(Biphenyl)

C12 H% (C6 H.-,)2 8.79 TC 242 136

(Biphenyl)

C12 H+

10 (C6 H.A.CO CO 12.24 ± 0. 13 SL 321 1237

(Benzophenone)

81
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

C12 Htf

CiaH^o (G;Ho )2 21.9 ± 0.3 NS 545 1238

(Biphenyl)

cyclo-C6 (CH3 )£ Heat of formation 152 kcal mol 1

C12 H+ C6 (CH3 ) 6 7.85 ±0.02 PI 152* 1142

(Hexamethylbenzene)

Cl2 H+8 C6(CH3 )6 7.85 PI 152* 168

(Hexamethylbenzene)

Ci2 H£6

n-Ci2 H26 9.93 TC 159 1439

C13 H9

Ci3 Hg Ci3 Hg 7.07 SL 126

(Fluorenyl radical)

Ci3 Hg Ci3 Hg 7.31 TC 136

(Perinaphthenyl radical)

CisHjo

Cl3 H+

0 Ci3 Hio 8.63 SL 243* 126

(Fluorene)

Ci3 hj-0 Ci3 h10 8.56 TC 241 136

(Fluorene)

CisH'ii

C13 H+ (C6 H5) 2 CH 7.32 ±0.1 SL 217* 71 (Diphenylmethyl radical)

C13H+ (CeH^CH 7.42 TC 219 136

(Diphenylmethyl radical)

c13 h+

9 C13 H+

9 CX9H32 n-CeHi3 10. 15 ± 0.

EVD 181 2153

(7-Phenyltridecane)

C13 H+9 C26 H46 10.28±0.1 EVD 2153

(7-Phenyleicosane)

c13 H|8 Ci3 H+

8 n-Ci3 H28 9.92 TC 154 1439

c14 h^

C14 H+ (C6H5)2 C2 h2 16.66 ±0.05 SL 483 1238

(Diphenylacetylene)

C14 H+ C 14 H10 h2 18.58±0.1 SL 476 1238

(Phenanthrene)

82
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation

(keal mol -1

)

Ref.

ChH^

C14 H+ (C6 H5 >2C2 H 15.13 ±0.1 SL 396 1238

(Diphenylacetylene)

Ci-jHg C14H10 H 16.25 ±0.1 SL 370 1238

(Phenanthrene)

ChH|0 (Diphenylacetylene) Heat of formation 303 keal mol 1 ChHJ’q (Anthracene) 228 keal mol 1 Ci4H|0 (Phenanthrene) 233 keal mol-1

ChH+q (C6 H5)2 C2 8.85 ±0.05 SL 303* 1238

(Diphenylacetylene)

Ci4 H,+

0 (C6Hs)2 C2 8.55 TC 296 136

(Diphenylacetylene)

Ci4 H+0 C14H10 7.55 SL 228* 413

(Anthracene)

Ci 4 H+0 C14H10 7.2 CTS 220 2037

(Anthracene)

ChH^ C14H10 7.25 TC 221 348

(Anthracene)

Ci4H+

0 C14H10 7.42 TC 225 1064

(Anthracene)

Ci 4 H+0 C14H10 8.11 TC 241 136

(Anthracene)

C14H10 8.10± 0.04 SL 234* 1238

(Phenanthrene)

C14H+ C14H10 8.03 SL 233* 413

(Phenanthrene)

Ci4H^0 C14H10 7.94 TC 231 348

(Phenanthrene)

Ci4 Hj+

0 C14H10 8.07 TC 234 1064

(Phenanthrene)

Cl 4 Hj+

0 C14H10 8.50 TC 244 136

(Phenanthrene)

C14HI0

ChH+j2 (CeH5 ) 2 C2 23.35 ±0.1 NS 637 1238

(Diphenylacetylene)

C14H+2 C14H10 21.1 NS 540 413

(Anthracene)

c14 h+2 c14 h10 23.1 NS 580 413

(Phenanthrene)

Ci4H30 C1 4 n-CnHijo 9.92 TC 149 1439

C15H23

CisH.t.j C26 H46 10.30 ±0.1 EVD 2153

( 9-Phenyleicosane)

C15H32

CisH^ n-Ci 5 H32 9.91 TC 144 1439

83
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

CieHio

C16 H+

0 CifiHio 8.54 TC 136

(Fluoranthene)

C1 (i H+

0 CieHio 7.72 SL 1069

(Pyrene)

Ci6 H+

0 Ci6 H,o 7.31 CTS 2037

(Pyrene)

CieHj^ CisHio 8.35 CTS 2037

(Pyrene)

CigHj1 ,) CjhHio 7.06 TC 348

(Pyrene)

C1 (i H+

0 CieHio 7.70 TC 1064

(Pyrene)

Ci 6 H+

0 Ci6 Hio 8.13 TC 136

(Pyrene)

Ci6 H£5

CifiH.+ CihHso C2 H5 ? 9.26 ± 0.1 EVD 145 2153

(3-Phenyldodocane)

c16 hj4

Ci6Hg4 n-CieH34 9.91 TC 139 1439

C17H36 C17 H3+

6 n - C1 7 H;itj 9.89 TC 134 1439

CigH^ (1,2-Benzophenanthrene) Heat of formation 251 kcal mol 1

CinHj^ CigHi 2 7.53 SL 1069

(1,2-Benzanthracene)

C18 H+ C]gHi 2 7.11 TC 348

(1,2-Benzanthracene)

CigH+ C)H Hi 2 (1,2-Benzanthracene)

7.52 TC 1064

CigH+g CigH , 2 6.95 SL 1069

(2,3-Benzanthracene)

CigH+

2 CigHi2 6.^2 TC 348

(2,3-Benzanthracene)

CigH+ CigHi 2 6.94 TC 1064

(2,3-Benzanthracene)

CigHj^ CigH]2 7.81 TC 136

(2,3-Benzanthracene)

CigH+

2 CigHi 2 8.01 SL 251* 1069

(1,2-Benzophenanthrene)

Ci8 H+

2 CigHi 2 7.70 TC 244 348

(1,2-Benzophenanthrene)

CigH+ CigH12 7.82 TC 247 1064

(1,2-Benzophenanthrene)

CigH+ CigH]2 7.88 TC 348

(3,4-Benzophenanthrene)

CigH+ CigH I2 8.36 TC 136

(3,4-Benzophenanthrene)

CigH+ CigHi 2 8.19 SL 1069

(9,10-Benzophenanthrene)

CigH,+

2 CigHi2 8.02 TC 348

(9,10-Benzophenanthrene)

84
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c18 h+

4 CI 8 H+ CjkHh 8.09 TC 348

(o-Diphenylbenzene)

Ci 8 H+ Ci 8 Hi4 8.25 TC 348

(m-Diphenylbenzene)

CisHjg

CihH.^ C26 H4 H 10.12 ± 0.1 EVD 2153

(9-Phenyleicosane)

CisHgo

CihH+o C1 SH30 9.05 ±0.1 EVD 165* 2153

( 1 -Phenyldodecane)

CisHgo Ci«H30 8.95 ±0.1 EVD 163* 2153

(3-Phenyldodecane)

CigHj^s (CeHs^C

(Triphenylmethyl radical)

c199*115 h

7.26 TC 136

CigHgj Cl9H32

(7-Phenyltridecane)

C19H32

8.91 ±0.1 EVD 157* 2153

C20HJ2

C2oHjt2 (Perylene)

+

12 (Perylene)

C2oH+2 (Perylene)

C2oHi2

C20H12 6.85 CTS 2037

C20H12 6.94 TC 348

C20 H12 7.10 TC 1064

C26 H46 C20H33 C2 oH^ 9.94 ±0.1 EVD 2153

(7-Phenyleicosane)

C.1 H+ (C6 H5 )3C3 (1,2,3-Triphenylcyclopropenyl radical)

C21 H+

6.38 TC 136

C22H^2 ^22^112 C22 HX

(Anthanthrene)

22H22 C22HJ2

(1 ,12-Benzoperylene)

€22 !!^

7.10 TC 1064

7.24 TC 348

85
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C22 HJ4 C22 Hj^ C22 H14 6.61 TC 1064

(Pentacene)

C22 Hj^4 C22 H14 6.73 TC 348

(Pentacene)

C22 H+J C22H14 8.18 TC 348

(1,2,3,4-Dibenzanthracene)

C22 Hj*^ C22 H14 7.09 TC 348

(1,2 ,5,6-Dibenzanthracene)

C22 Hjt'4 C22 H14 7.57 TC 1064

(1 ,2,5,6-Dibenzanthracene)

C22 Hjl4 C22 H14 6.99 TC 348

(1,2,7,8-Dibenzanthracene)

C22 H^4 C22 H14 7.11 TC 348

(Pentaphene)

C22 Hjl_4 C22 H14 7.51 TC 348

(Picene)

C22 Hj7 C22 Hj^7 C26 H46 ra-C4 Hg 9.99 ±0.1 EVD 129 2153

(5-Phenyleicosane)

C23 HJ9

C23Hg9 C26 H46 n-C3 H7 9.76 ±0.1 EVD 120 2153

(4-Phenyleicosane)

C24HI2

C24Hj+

2 C24H12

(Coronene)

C24 Hjt2 C24H12

(Coronene)

c24 h^

C24 H+ C26 H46 C2 H5 9.68 ± 0.1 EVD 115 2153

(3-Phenyleicosane)

C25 Ht3 C25 H+ C26 H46 CH3 10.14±0.1 EVD 117 2153

(2-Phenyleicosane)

7.56 TC 348

7.64 TC 1064

86
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

APorIP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C26 H+ C26 H46

C26H|6

9.34 ±0.1 EVD 134* 2153

(1-Phenyleicosane)

C26 H+ C26H46 9.22 ±0.1 EVD 129* 2153

(2-Phenyleicosane)

C26H+6 C26H46 8.95 ±0.1 EVD 123* 2153

(3-Phenyleicosane)

C26 H+ C26 H46 9.01 ±0.1 EVD 125* 2153

(4-Phenyleicosane)

C26 H4+

6 C26 H46 9.04 ±0.1 EVD 125* 2153

(5-Phenyleicosane)

C26 H+ C26 H46 8.97 ±0.1 EVD 124* 2153

(7-Phenyleicosane)

C26 H+ C26 H46 9.06 ±0.1 EVD 126* 2153

(9-Phenyleicosane)

C2 8 H*

4 C28H14

(Mesonaphthodianthrene)

C3oHj+

6 (Pyranthrene)

c30h16

C28 H+

14

6.42 TC

CaoH+

16

6.98 TC

1064

1064

C32H14

C32 H+ C32 H14 7.01 TC 1064

(Ovalene)

C34H20

C34H+ C34 H20 6.86 TC 1064

(Violanthrene)

C34 H2+

0 C34 H20 6.76 TC 1064

(Isoviolanthrene)

87
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

CB+

CB+ CB 10. 0 ± 0.6 LE 430 2176

CB+ CB 10.5 NS 441 1116

CBi

CB+ cb2 10.2 + 0.6 LE 418 2176

CB+ cb2 10.7 NS 430 1116

C2 B

c2 b

+ c2 b 10.4 + 0.6 LE 423 2176

c2 b+ c2 b 10.7 NS 430 1116

C2 H5 Li£

C2 H5 Li+ (C2 H5 Li)4 1 1.7 R 0.5 NS 1 C4 Hi0 LiJ

C4 HjoLi+ (C2 H5 Li)4 11.7 ± 0.5 NS 1 CeHisLi^

CeHisLi^ (C2 H5 Li)4 c2 h5 8.0 + 0.5 NS 1 CsH^Lit

C8 H20 Li+ (C2 H5 Li )6 12.5 ±0.5 NS 1

Ci0H25 Li^

Ci 0 H25 Li+ (C2 H5 Li )6 c2 h5 7.7± 0.5 NS 1 ch3 b+ ch3 b

+ (CH3 )3 B 2CH3 ? 17.0 + 0.5 SL 296 364

c2 h6 b+ c2 h«b+ (CH3 )3 B ch3 10.3 + 0.2 SL 175 364

c3 h9b+

C:,H9 B+ (CH3 ) 3 B 8 . 8 ± 0.2 SL 173* 364

C4Hi0B+ C4 H10 B"*" (C2 H5 )3 B c2 h5 9.6 + 0.2 SL 159 364

c6h15 b

CbH15 B- (C 2 H5 )3 B 9.0± 0.2 SL 170* 364

C2 Hi8Bio

C2 H,hB+

0 C2 HsBioHi3 9.0±0.5 SL 103

88
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

N+ Heat of formation 448 kcal mol l N+ N 14.549 s 448* 2113

N+ N 14.53 ± 0.12 SL 448 78

N+ N 15 SL 459 154

N+ N 14.8 cs 454 2 N+ N 14.72±0.26 LE 452 1133

N+ N 16.1 ±0.3 LE 1133

N+ N, N 24.3 ±0.2 PI 447 163

N+ n2 N 24.32 ±0.02 RPD 448 49

N+ n2 N(2 D) 26.66 ±0.05 RPD 447 49

N+ n2 N(2 P) 27.93 ±0.05 RPD 449 49

N+ N, N 24.60 ±0.1 SL 454 364

N+ n2 N 23.5 SL 429 78

N+ n2 N 23.8 ±0.5 LE 436 2021

N+ n2 N(2 D) 25.6±0.5 LE 422 2021

N+ n2 N(2 P) 28.3 ±0.2 LE 457 2021

N+ NH, h2 + h 22.6 ±0.1 NS 458 132

N+ NH, 3H 26.65 ±0.1 NS 447 132

N+ ('l D) NH:i h2 + h 24.1 ±0.1 NS 493 132

N+

(

]l D) nh3 3H 28.6 ±0.1 NS 492 132

N+ hn3 n2 + h? 19.7 ± 0.3 SL 473 340

N+ CNOCCN c3 +cn? 26. 0± 1.0 SL 438 154

N+ CNOCOCCN 19 SL 154

N+ CNOCOCCN 26.8±0.3 SL 154

N+ NO 0- 19.55 ±0.04 RPD 448 328

N+ NO 0- 19.8 ± 0.2 FDP 454 1378

N+ NO 0- 19.573 ±0.02 D 449 6

N+ NO 0 21.8 ± 0.4 PI 465 163

N+ NO 0 21.11 ±0.04 RPD 449 328

N+ NO 0 23.03 ±0.04 RPD 328

N+ NO 0 21.2 ± 0.5 LE 451 2021

N+ NO 0 23.2 ±0.5 LE 2021

N+ NO 26.1 ±0.5 LE 2021

N+ NO 0+ 34.1 ±0.7 LE 434 2021

N+ n2 o NO 20.0 ±0.3 PI 459 163

N+ n2 o NO 20.1 RPD 462 2018

N+ n2 o NO 20.8 RPD 2018

N+ n2 o NO 21.8 RPD 2018

N+ n2 o NO 23.3 RPD 2018

N

+ nf3 f2 + f 22.2 ±0.2 SL 463 401

89
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

Nt (X 2Sj) Heat of formation 359 kcal mol 1 Nt (A mu) 385 kcal mol -1

Nt (B 432 kcal mol-1

Nt (C 22+) 544 kcal mol-1

N+(X 2X+) n2 15.576 S 359* 2100

N+(X 2 S+) n2 15.56 PI 359 2033

N;(X 2 2+) n2 15.6±0.1 PI 360 163

Nj (X 2 2+) n2 15.57 PE 359 248

N2 (X 2 X+) n2 15.63 ±0.02 RPD 360 1012

NJ.(X 2 2+) n2 15.56±0.10 CS 359 383

N+ n2 15.7 EC 362 218

n2 16.2 ±0.1 RPD 1012

(Autoionization)

nj (A mu ) n2 16.693 S 385* 2100

Nj (A *ntt ) n2 16.9 ±0.3 PI 390 163

NJ (A 2nu ) n2 16.72 PE 386 248 n+ (A mu ) n2 17.00 ±0.05 RPD 392 1012

N+ (B *2+) n2 18.745 S 432* 2100

Nj (B 22+) n2 18.8 ±0.4 PI 434 163

NJ (B *X£) n2 18.72 PE 432 248

N+(B *2+) n2 18.94 ±0.06 RPD 437 1012

N+ n2 20.7 ±0.4 PI 163

N+ (C 2 X+) n2 23.575 S 544* 2100

n+ (A mu ) n2 h4 2H2 16.2 ±0.1 SL 3% 424

N+ hn3 NH 16.0±0.1 SL (b) 340

N+ ch3n2 h3 ch4 +h2 13.2 ±0.3 SL 345 424

N+ (CH3 ) 2 N2 H2 2CH4 13.2 ±0.1 SL 360 424

(1,1-Dimethylhydrazine)

N+ (CH3)2N2 H2 2CH4 12.5 ±0.2 SL 346 424

(1,2-Dimethylhydrazine)

N+ (CH3 )3N2 H ch4 +c2 h6 13.2 ±0.2 SL 362 424

NJ (CH3)4]N 2 2C2 H6 13.1 ±0.2 SL 359 424

Nj n2o 0 17.4 ±0.2 PI 361 163

N^ 2 N+ 2 n2 43.5 ±0.3 FDP 1003 212

NJ

1 3 hn3 H 16.0 ±0.2 SL 387 340

N+ ch3 n3 ch3 17.6±0.5 SL 430 340

NH+ Heat of formation 382 kcal mol 1 NH+ NH 13.10±0.05 NS 381* 132

NH+ nh3 h2 17.1 ±0.1 NS 383* 132

NH+ nh3 2H 21.6±0.1 NS 383* 132

NH+ hn3 n2 14.4±0.2 SL 402 340

NH^ Heat of formation 304 kcal mol- 1 NH+ nh2 1 1 .4 ± 0.

SL 304* 34

NH+ nh3 H 16.0±0.1 SL 306* 34

NH+ n2 h4 nh2 13.9±0.4 SL 302* 34

90
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

NHJ Heat of formation 223 kcal mol 1

NH+ nh3 10.19 S 224* 1070

NH+ nh3 11.0 + 0.2 s 243 138

NH+ nh3 10.154 + 0.01 PI 223* 159

NH+ nh3 10.15 + 0.01 PI 223* 416, 182

NHJ nh3 10.07 + 0.05 PI 221* 155

NHJ nh3 ro.i6 PE 223* 1130

NH+ nh3 10.40 + 0.02 RPD 229 463

NH+ nh3 10.34 + 0.07 SL 227 14

NH+ nh3 10.50 + 0.09 SL 231 411

NH+ nh3 10.3 EC 227 218

NH+ nh3 9.94 TC 218 335

NH+ nh3 17.0 + 0.5 S 138

NH+ nh3 15.02 PE 1130

NH; ( 2 E) nh3 15.31 + 0.04 RPD 342 463

NHj nh3 16.20 TC 335

NH£2 NH3+2 nh3 33.7 + 0.2 FDP 766 212

NH3+ 2 nh3 36.8 FDP 212

N2 H+

n2 h+ n2 h, h2 + h 14.8 + 0.3 SL 312 424

n2 h+ hn3 N 13.8 + 0.2 SL 276 340

n2 h+ ch3 n2 h3 ch3 + h>? 13.3 + 0.3 SL 296 424

n2 hj

n2 h+ n2 h. 9.85 + 0.1 SL 33, 34

n2 h+ N2 H4 h2 10.98 + 0.2 SL 276 33, 34

n2 h+ n2 h. h2 11.9 + 0.2 SL 297 424

n2 h+ n2 h4 2H 16.6 + 0.1 SL 301 424

N2 H+ ClLN.H, ch4 11.2 + 0.2 SL 299 424

n2 h2+ (CH3 >2 N2 H2 c2 h« 8. 6 + 0.1 PI 238 1141

(1,1-Dimethylhydrazine)

n2 h2+ (CH3 >2 N2 H2 0,11, + h2 ? 12.9 + 0.1 SL 305 424

(1 ,1 -Dimethylhydrazine)

N2 Hj (CH3 >2 N2 H2 c2 h« 11.0 + 0.2 SL 296 424

(1,2-Dimethylhydrazine)

N2H+ (CH3 >2 N2 H2 c,h4 + h2 ? 13.0 + 0.2 SL 309 424

(1,2-Dimethylhydrazine)

n2 h2+ (CH3 )3 N2 H c2 h4 + ch4 11.9+1.0 SL 299 424

n2 h+ (CH3 )4N2 C2 H« + O’H, 11.9 + 0.2 SL 299 424

n2 h2+ C4 H»(CH3 )N2 H2 n-C5 Hi 2 9.5 ± 0.2 PI 258 1141

(1-Methyl-l -n-butylhydrazine)

n2 h; C4 H9(CH3 )N2 H2 U-C5 H12 11.1 + 0.1 PI 1141

(1-Methyl-l -n-butylhydrazine)

91
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

N2 H£

N2 H3+ n2 h3 7.88±0.2 SL 34

N2 H3+ n2 h4 H 10. 6 ± 0.1 PI 215 1141

N2 H3+ n2 h4 H 11.18 + 0.1 SL 229 34

N.HJ N2 H4 H 11.3 ±0.1 SL 231 424

n2 h+ N2 H4 H 11.3 NS 231 1455

n2 h3+ ch3 n2 h3 ch3 9.5 + 0.1 PI 208 1141

N2 H3+ CHaN2 H3 ch3 10.7±0.3 SL 236 424

n2 h- (CH3 >.N2 H2 c2 h5 10. 2 ± 0.2 SL 232 424

(1,2-Dimethylhydrazine)

N»I£ (CH3 )3 N2 H c2 h4 +ch3 ? 11.7 ± 1.0 SL 243 424

n2 hj Heat of formation 224 kcal mol -1

n2 h4+ n2 il 9.56 ±0.02 PI 243- 1166

N2 H; n2 h4 8.74±0.06 PI 224* 1141

n2 h4 n2 h4 11.0 ± 0.1 PI 1141

n2 h4+ N2H4 8.74 ±0.06 PI 224* 2173

n2 h4+ n2 il 9.00 ±0.1 SL 230 424

n2 h+ (CHs )3 N2 H C2 H2 +CH4 11.9lo.2 SL 257 424

N2 H; (CH3 )4 n2 0 12.3 ±0.1 SL 424

n3 h+ n3 h+ HN3 10.3 ±0.2 SL 308* 340

n3 ht

n3h3+ N3 H3 9.6±0.1 SL 34

CN+ Heat of formation 430 kcal mol- 1 CN+ CN 14.5 ±0.5 SL 434* 154

CN+ CN 14.2 ±0.3 NS 427* 2145

CN+ c2 n2 CN 21.5 ± 0.3 SL 470 154

CN+ c2 n2 CN 20.4±0.3 NS 444 2145

CN+ CNC=CCN c3 n 19.2±0.3 SL 154

CN+ CNOCOCCN c5 n 20.0 ± 1.0 SL 154

CN+ CH=CCN c2 h 19.8±0.2 SL 436 154

CN+ C3 H5 CN cyclo- C3 H5 19.5 ± 0.4 EVD 202

(Cyclopro pyl cyanide)

CN+ CNC1 ci- 15.5 ± 0.2 SL 449 73

CN+ CNC1 Cl 18.3 ±0.2 SL 426 73

CN+ CNBr Br- 14.6±0.1 SL 437 73

CN+ CNBr Br 18.3±0.1 SL 440 73

CN+ CNI I 18.1 ± 0.1 SL 446 73

c2 n+

C2 N+ c2 n 13 SL 154

c2 n+ c2 n2 N 19.5 ±0.1 SL 411 154

c2 n+ CNC=CCN c2 n 18.1 ±0.4 SL 154

c2 n+ CNC=CC^CCN c4 n 17.0±0.1 SL 154

c2 n+ CNC=CC=CCN 19.7 ±0.5 SL 154

C,N+ c2 h5 n H2 + 3H? 23.0 ±0.4 EVD 400 51

(Ethylenimine)

c2 n+ CH=CCN CH? 18.0±0.5 SL 364 154

c2 n+ CH=CCN C + H 24.0±0.5 SL 421 154

92
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c3 n+

C,N+ C;i N 14.4 SL 154

C3 N+ CNC^CCN CN 18.4 ± 0.2 SL 452 154

C3 N+ CNC=CC^CCN C3 N 22.0 ±0.5 SL 154

c3 n+ CH^CCN H 18.2 ± 0.3 SL 459 154

c4 n+

c4 n+ c4 n 11.9 ± 0.5 SL 154

c4 n+ CNC=CCN N 18.8 ± 0.5 SL 449 154

CiN+ CNC^COCCN C.N 19. 0± 1.0 SL 154

c5 n+

c5 n+ CNC=CC=CCN CN 17.3 ± 0.2 SL 482 154

C«N+

c6 n+ c6 n 12.2 ±0.1 SL 154

c6 n+ CNC=CC=CCN N 19.2 ±0.3 SL 513 154

C2 N£ Heat of formation 387 kcal mol -1

C2 N+ c2 n2 13.57 ±0.02 387* 2114

c2 n+ c2 n2 13.6 ± 0.2 SL 387* 154

c4 N£

c4 n+ CNC=CCN 11.4 ± 0.2 SL 391 154

c6 n^

c6 n2+ CNC=CC=CCN 11.4± 0.2 SL 446 154

CHN+ Heat of formation 351 kcal mol -1 CHN+ HCN 13.73 ±0.09 SL 349* 411

CHN+ HCN 13.91 ±0.04 cs 353* 282

CHN+ CH3 N3 H2 + n2 13.6± 0.5 SL 371 340

ch2 n+

CH2 N+ (CH2 )3 NH GIR + H 13.1 ±0.2 EVD 253 52

(Azetidine)

CH2 N+ (CH2 )4 NH c3 h6 +h 13.9± 0.2 EVD 262 52

(Pyrrolidine)

CH2 N+ ch3 n3 h+n2 10.5 ±0.1 SL 247 340

CH4 N+ Heat of formation 178 kcal mol-1

CILN+ C2 H5 NH2 CHa 9.71 PI 179* 11 CIEN+ (CH2 )3NH c2 h2 +h 12.3 ±0.2 EVD 193 52

(Azetidine)

CILN+ n-C3 H7 NH2 c2 h5 9.54 PI 178* 11 CBW (CH2 )4 NH C3 H4 + H 12.7 ±0.2 EVD 193 52

(Pyrrolidine)

CH4 N+ ch2 nh2 cooh cooh 10.1 ±0.2 LE 175 88

ch2 d2 n+

ch2 d2 n+ c6 h5 ch2 nd2 c6 h5 11.0± 0.1 PI 1160

{N,N-ck -Benzylamine)

93

323-656 0-69—7
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

]

I ch5 n+ Heat of formation 201 kcal mol-l

ch5 n+ CHaNH, 8.97 ±0.02 PI 201* 159,

ch5 n+ CH3 NH2 9.18 PE 206 416, 182

ciw CILNH, 12.16 PE 1130

ch5 n+ CH3 NH2 13.94? PE 1130

ch5 n+ CIENH, 15.07 PE 1130

ch5 n+ CH3 NH2 16.57 PE 1130

ch5 n+ ch3 nh2 19.89? PE J130

ch5 n+ ch3 nh2 9.45 ±0.08 RPD 212 1072

ch5 n+ OLNH, 12.35±0.10 RPD 1072

ch5 n+ CH3 NH2 13.90± 0.30 RPD 1072

ch5 n+ CILNH, 17.70± 0.70 RPD 1072

ch5 n+ CH3 NH2 21.75±0.20 RPD 1072

ch5 n+ ch3 nh2 23.75 ±0.70 RPD 1072

ch5 n+ CHaNH, 9.41 ±0.08 SL 212 14

ch5 n+ CH3 NH2 9.27 ±0.1 SL 208 67

CHsN+ ch3 nh2 9.41 ±0.02 CS 212 383, 384

ch5 n+ CHaNH, 9.56 TC 215 136

ch5 n+ ch3 n2 h3 NH 11.3 ±0.1 PI 204 1141

c2 hn+

c2 hn+ c2 h5 n 2H2 18.1 ±0.6 EVD 443 51

(Ethylenimine)

c2 h2 n+ Heat of formation 298 kcal mol-1

c2 h2 n+ ch2 cn 10.87 ±0.1 SL (a) 125

c2 h2 n+ ch2 cn 10.86±0.2 SL (a) 125

c2 h2 n+ ch2 cn 10.95 ±0.2 SL (a) 125

c2 h2 n+ ch3 cn H 14.28± 0.05 SL 298* 125

c2 h2 n+ c2 h5 n 17.0± 0.2 EVD 51

(Ethylenimin e) ch3cn+ Heat of formation 302 kcal mol-1

C>H:i N+ CHaCN 12.205 ±0.004 PI 302* 1253

c2 h3 n+ CH3 CN 12.22±0.01 PI 303* 182

c2 h3 n+ CH3 CN 12.34 ±0.04 RPD 305 286

c2 h3 n+ CH3 CN 12.96 ±0.03 RPD 286

c2 h:! n+ CH3 CN 13.92 ±0.04 RPD 286

c2 h3 n+ CHaCN 12.42 ±0.09 SL 307 411

C2 H.)N+ CHaCN 12.3±0.1 EC 305 2171

C2 H3 N+ CHaNC \11.8±0.1 EC 308 2171

c2 h3 n+ C2 H,N h2 15.2 ± 0.3 EVD 377 51

(Ethylenimine)

c2 h4 n+

C2 H4 N+ CaH-.N H 12.2 ±0.1 EVD 255 51

(Ethylenimine)

C2 ILN+ (CH-)aNH CHa 11.9±0.2 EVD 257 52

(Azetidine)

C2 ILN+ (CH2 )4 NH C2 H;, 13.0 ± 0.2 EVD 273 52

(Pyrrolidine)

c2 h4 n+ (CH3 )2 N2 H2 nh2 + h2 ? 12.8 ± 0.2 SL 274 424

(1,1-Dimethylhydrazine)

C2 ILN+ (CHt )2N2 H2 nh2 + h2 ? 12.1 ±0.5 SL 260 424

(1 ,2-Dimethylhydrazine)

C>H,N+( CHa h N2 H nh2 + ch. 11.7 ± 0.2 SL 266 424

C2 H4 N+ (CHahN2 nh2 + c2 h6 ? 12.2 ± 0.2 SL 277 424

94
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

cyclo-C2 H5 N+ Heat of formation 255 kcal mol 1

c2 h5 n+ c2 h5 n 9.94 ±0.15 EVD 255* 51

(Ethylenimine)

c2 h5 n+ c2 h5 n 9.8 EC 252 218

(Ethylenimine)

c2 h5 n+ c2 h5 n 8.24 TC 216 2184

(Ethylenimine)

c2 h5 n+ (CH2 )4 NH c2 h4 12.3 ± 0.2 EVD 269 52

(Pyrrolidine)

c2 h5 n+ (CH3 )2 N2 H2 8.8 ±0.1 PI 1141

(1,1-Dimethylhydrazine)

c2 h5 n+ (CH:i >.N2 H2 10.9 ± 0.2 PI 1141

(1,1-Dimethylhydrazine)

c2 h5 n+ (CH3)2 N2 H2 12.5 ±0.2 SL 424

(1,1-Dimethylhydrazine)

c2 h6 n+

c2 h„n+ ( CH3 )3 N ch3 12.3±0.1 NS 245 303

c2 h«n+ (CH3 )2 N2 H2 Nh2 9.0 ± 0.2 PI 186 1141

(1,1-Dimethyldrazine) c2 h; n+ (CH3 )2 N2 H2 NH> 11.2 ± 0.2 PI 1141

(1,1-Dimethylhydrazine)

C2 HhN+ (CH3 )2 N,H2 nh2 10.9 ± 0.2 SL 230 424

(1,1-Dimethylhydrazine)

C2 Hfi N+ (CH3 )2N2 H2 nh2 10.7 ±0.1 NS 225 303

(1,1-Dimethylhydrazine)

C2 HhN+ (CH3 )3 N2 H ch3 nh 11.1 ±0.2 SL 424

C2 HhN+ (CH3 )4 N2 (CH3 >2 N 11.2 ± 0.2 SL 424

c2 h(; n+ (CH3 )4 N2 (CH3 )2 N 11.2 ± 0.1 NS 241 303

c2 h«n+ (CH3 )2 NN=NN(CH3 )2 9.85 ±0.1 NS 303

c2 h6 n+ (CH3 )2 NCHO 11.6 ±0.1 NS 303 c6 h6 n+ (CtEhNCOCH, 12.4 ±0.1 NS 303

C2 H6 N+ (CH3 )2 NNO NO 10.9±0.1 NS 244 303

c2 h«n+ (CH3 >2 nno2 no2 11.1 ±0.1 NS 282 303

C2 H5 NH^ Heat of formation 193 kcal mol 1 (CH3)2 NH+ 186 kcal mol 1 c2 h7 n+ c2 h5 nh2 8.86 ±0.02 PI 193* 159, 182

c2 h7 n+ c2 h5 nh2 8.8 PI 192 86

c2 h-n+ c2 h5 nh2 8.9 PI 194 11 c2 h7 n+ c2 h5 nh. 9.19 PE 201 1130 c2 h7 n+ c2 h5 nh2 11.86 PE 1130

c2 h7 n+ c2 h5 nh2 12.66 PE 1130

c2 h7 n+ c2 h5 nh2 14.65 PE 1130

c2 h7 n+ c2 h5 nh2 15.55 PE 1130

c2 h7 n+ c2 h5 nh2 16.81 PE 1130

c2 h7 n+ c2 h5 nh2 19.71 PE 1130

c2 h7 n+ c.h5 nh2 9.19±0.05 SL 201 14

c2 h7 n+ (CH3 ) 2 NH 8.24 ±0.02 PI 186* 159, 182 c2 h7 n+ (CH3 )2 NH 8.36 PE 188 1130

c2 h7 n+ (CH3 >.NH 12.88 PE 1130

c2 h7 n+ (CH3 )2 NH 14.63 PE 1130 c2 h7 n+ (CH3 ) 2 NH 16.35 PE 1130 c2 h7 n+ (CH3 )2 NH 19.62? PE 1130

c2 h7 n+ (CH3 )2 NH 8.93 ±0.03 SL 201 14

c2 h7 n+ (CH3 >2 NH 9.21 ±0.05 CS 208 384 c2 h7 n+ (CH3 >,NH 9.01 TC 203 136

c2 h7 n+ (CH3 )2 N2 H2 NH 11.2 ±0.2 PI 199 1141

(1,1-Dimethylhydrazine)

95
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c3 hn+

c3 hn+ CH^CCN 11.6 ± 0.2 SL 358 154

C3 HN+2

C3 HN+ 2 CH=CCN 32.3 + 0.2 SL 836 154

c3 h2 n+

c3 h2 n+ ch2=chcn H 13.82 ±0.08 EVD 311 1406

c3 h,n+ C4 H4 N2 HCN+H 15.01 ± 0.10 EVD 309 1406

(Metadiazine)

C3 H2 N+ c4 h4 n2 HCN+H 15.25 + 0.10 EVD 314 1406

(Paradiazine)

ch2=chcn+ Heat of formation 296 kcal mol 1

c3 h3 n+ CH.=CHCN 10.91 + 01 PI 296* 182

c3 h3 n+ ch2=chcn 11.10±0.05 EVD 301 1406

c3 h3 n+ C5 H5 N c2 h2 13.84±0.10 EVD 299 1406

(Pyridine)

c3 h3 n+ c4 h4 n2 HCN 12.87 + 0.10 EVD 311 1406

(Metadiazine)

c3 h3 n+ c4 h4 n2 HCN 12.81 + 0.10 EVD 310 1406

(Paradiazine)

c3 h4 n+

C.3 H4 N+ CHaCHCN 9.76±0.1 SL 125

c3 h4 n+ CH2 CH2 CN 9.85 + 0.1 SL 125

c3 h5 n

c3 h5 n+ c2 h5 cn 11.84 ±0.02 PI 289* 182

c3 h5 n+ c2 h5 cn 1 1 .9 ± 0.EC 290 2171

c3 h5 n+ c2 h5 nc 11.2 ± 0.1 EC 289 2171

c3 h6n+

c3 h6 n+ (CH2 )3 NH H 1 1.4 ± 0.2 EVD 226 52

(Azetidine)

c3 h7 n+

c3 h7 n+ (CH2 )3 NH 9.1 ±0.15 EVD 225* 52

(Azetidine)

c3 h7 n+ (CH2 )3 NH 8.9 EC 221 218

(Azetidine)

c3 h7 n+ (CH2 )3 NH 8.07 TC 202 2184

(Azetidine)

fi-C3 H7 NH^ Heat of formation 185 kcal mol 1 iso-C3 H7 NH+

2 183 kcal mol-1

(CH3)3 N+ 175 kcal mol-1

C3 H9N+ n-C3 H7 NH2 8.78 ±0.02 PI 185* 159, 182

c3 h9 n+ n-C3 H7 NH2 8.7 PI 183 86

c3 h9 n+ n-C3 H7 NH2 8.8 PI 186 11

96
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(keal mol -1

)

Ref.

c3 h9 n+ iso-C3 H7 NH2 8.72 ±0.03 PI 183* 159, 182

C3 H9 N+ iso-C3 H7 NH2 8.86 PE 186 1130

C3 H9 N+ i5o-C3 H7 NH2 11.23 PE 1130

c3 h9 n+ tso-C3 H7 NH2 14.87 PE 1130

c3 h9 n+ iso- C3 H7 NH2 16.41? PE 1130

c3 h9 n+

i5o-C3 H-NH2 19.09? PE 1130

c3 h9 n+ (CHa^N 7.82 ±0.02 PI 175* 159,416,

182

c3 h9 n+ (CH3 )3 N 8.12 PE 181 1130

c3 h9 n+ (CH3)3 N 11.63 PE 1130

c3 h9 n+ (CH3 )3 N 13.52 PE 1130

c3 h9 n+ (CH3 )3 N 15.31 PE 1130 c3 h9 n+ (CHafeN 19.34? PE 1130

c3 h9 n+ (CH3 )3 N 8.32 ±0.02 SL 186 14

c3 h9 n+ (CH3 >,N 9.02 ±0.05 CS 202 384 c3 h9 n+ (CH3 )3 N 8.66 TC 194 136

c4 h4 n+

c4 h4 n+ CbHsNH, c2 h3 ? 12.3 ± 0.

PI 243 1160

(Aniline)

CH2 =CHCH>CN+ Heat of formation 281 keal mol-1

C4 H5 N+ (Pyrrole) 215 keal mol-1 c4 h,n+ ch2=chch,cn 10.39 ±0.01 PI 281* 182 c4 h5 n+ c3 h5 cn 11 .2 ± 0.2 EVD 301 202

(Cyclopropyl cyanide) c4 h5 n+ c4 h5 n 8.20 ± 0.01 PI 215* 182

(Pyrrole)

c4 h,n+ c4 h5 n 8.97 ±0.05 CS 233 381

(Pyrrole) c4 h5 n+ C4 H5 N 8.61 TC 224 136

(Pyrrole)

c4 h6 n+

c4 hb n+ (CH3 >,CCN 9. 15 ± 0.

SL 239* 125

c4 h7 n+

c4 h7 n+ n-C3 H7 CN 11.67 ±0.05 PI 280* 182 c4 h7 n+ n-C3 H7 NC 11.1 ± 0.1 EC 282 2171

c4 h8 n+

c4 h8 n+ (CH2 )4 NH H 11 . 0 ± 0.2 EVD 200 52

(Pyrrolidine)

C4 H9N+ (Pyrrolidine) Heat of formation 192 keal mol - 1

C4 H9 N+ CH3 CH=NC2 H5 9.29 PE 1130 c4 h9 n+ CH3 CH=NC2 H5 10.57 PE 1130 c4 h9 n+ ch3 ch=nc2 h5 11.63 PE 1130 c4 h9 n+ ch3 ch=nc2 h5 12.55 PE 1130 c4 h9n+ ch3 ch=nc2 h5 14.36 PE 1130 c4 h9 n+ ch3 ch=nc2 h5 15.63 PE 1130 c4 h9 n+ ch3 ch=nc2 h5 19.73? PE 1130

97
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c4 h9 n+ (CH2 )4 NH 8.41 PE 192* 1130

(Pyrrolidine)

c4 h9 n+ (CH2 )4 NH 11.10 PE 1130

(Pyrrolidine)

C4 H9 N+ (CH2 )4 NH 14.13 PE 1130

(Pyrrolidine)

C4 H9 N+ (CH2 )4 NH 16.64 PE 1130

(Pyrrolidine)

C4 H9 N+ (CH2 )4 NH 18.62 PE 1130

(Pyrrolidine)

C4 H9 N+ (CH2 )4 NH 9.0±0.15 EVD 206 52

(Pyrrolidine)

C4 H9 N+ (CH2 )4 NH 8.9 EC 203 218

(Pyrrolidine)

C4 H9 N+ (CH2 )4 NH 7.98 TC 182 2184

(Pyrrolidine)

n-C4 H9 NH| Heat of formation 179 kcal mol 1 sec-C4 H9 NH£ 177 kcal mol-1

iso-C4 H9NH| 177 kcal mol-1

tert-C4H9NH| 173 kcal mol-1

(C2 H5 )2 NH+ 163 kcal mol-1

c4 h„n+ n-C4 H9 NH2 8.71 ±0.03 PI 179* 159, 182

c4 h„n+ n-C4 H9 NH2 8.79 PE 181 1130

c4 h„n+ n-C4 H9 NH2 10.75 PE 1130

c4 hu n+ n-C4 H9 NH2 14.11? PE 1130

c4 h„n+ n-C4 H9 NH2 15.28 PE 1130

C4 HhN+ n-C4 H9 NH2 19.35? PE 1130

C4 Hn N+ 5ec-C4 H9 NH2 8.70 PI 177* 182

c4 h„n+i 5o-C4 H9 NH2 8.70 PI 177* 182

c4 h„n+ te/t-C4 H9 NH2 8.64 PI 173* 182

c4 h„n+ *er*-C4 H9 NH2 8.83 PE 177 1130

c4 h„n+ tert-C4 H9 NH2 9.81 PE 1130

c4 h„n+ ier£-C4 H9 NH2 12.46 PE 1130

c4 h„n+ tert-C4 H9 NH2 15.11 PE 1130

c4 h„n+ ter£-C4 H9 NH2 19.46? PE 1130

c4 h„n+ 8.01 ± 0.01 PI 163* 159. 182

c4 hu n+ (C2 H5 )2 NH 8.51 PE 175 1130

c4 h„n+ (C.HskNH 11.08 PE 1130

c4 h„n+ (QHsfeNH 14.45 PE 1130

C4 HuN+ (QHsfeNH 19.18? PE 1130

c4 h„n+ (C2 H5 )2 NH 8.44 ±0.01 SL 173 14

C4 HuN+ (C2 mN2 H2 NH 11.2 ± 0.1 PI 188 1141

(1,1-Dimethylhydrazine)

C5 H3 N+

C5 H3 N+ C5 H5 N h2 12.42 ±0.10 EVD 320 1406

(Pyridine)

c5 h4 n+

c5 h4 n+ c5 h5 n H 14.00± 0.10 EVD 304 1406

(Pyridine)

98
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c5 h2 d2 n+

c5 h2 d2 n+ c6 h5 ch2 nd2 c2 h5 ? 1 1.0 ± 0.2 PI 1160

(AyV-ck-Benzylamine)

C5 H5 N+ (Pyridi ne) Heat of formation 247 kcal mol - 1

c5 h5 n+ C5H5N 9.266 S 247* 1115

(Pyridine)

c5 h5 n+ C5H5N 9.23 ±0.03 PI 246* 416,182

(Pyridine)

c5 h5 n+ c5 h5 n 9.20 ±0.05 PI 246* 1160

(Pyridine)

C5H5N+ C5H5N 9.28 PE 248 1130

(Pyridine)

c5 h5 n+ C5H5N 9.45 ±0.05 EVD 251 1406

(Pyridine)

c5 h5 n+ C5H5N 10.06 ±0.05 EVD 266 1406

(Pyridine)

c5h5 n+ C5H5N 9.85 ±0.05 SL 261 217

(Pyridine)

C5H5N + C5H5N 9.76 ±0.05 cs 259 383

(Pyridine)

C5H5N+ C5H5N 10.3 s 1115

(Pyridine)

c5 h5 n + C5H5N 10.30 ±0.05 PI 1160

(Pyridine)

c5 h5 n+ C5H5N 10.54 PE 1130

(Pyridine) c5 h5 n + C5H5N 11.56 s 1115

(Pyridine) c5 h5 n+ C5H5N 11.05±0.1 PI 1160

(Pyridine)

C5H5N + c5 h5 n 12.22 PE 1130

(Pyridine) c5 h5 n+ C5H5N 13.43? PE 1130

(Pyridine)

C5H5N+ C5H5N 14.44 PE 1130

(Pyridine)

c5 h5 n+ C5H5N 15.49 PE 1130

(Pyridine)

C5H5N+ c5 h5 n 16.94 PE 1130

(Pyridine)

C5H5N+ C5H5N 19.39? PE 1130

(Pyridine) c5 h5 n+ C5H5N 20.14? PE 1130

(Pyridine)

c5 h6 n+

c5 h6 n+ c5 h4 nh2 7.55 SL 126

(Aminoeyclopentadienyl radical)

99
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c5 h„n+

c5 hu n+ (CH3 )2 C=NC2 H5 8.83 PE 1130

c5 h„n + ( CH3 )2 C=NC2 H5 9.79 PE 1130

c5 h„n+ (CH3 )2 C=NC2 H5 11.63 PE 1130

c5 h„n+ (CH3 )2 C=NC2 H5 14.08 PE 1130

c5 h„n+ (CH3 )2 C=NC2 H5 15.16 PE 1130

c5 h„n+ (CH3 )2 C=NC2 H5 19.50? PE 1130

c5 h„n+ (CH2 )5 NH 8.7 EC 191 218

(Piperidine)

c5 h„n+ (CH2 )5 NH 9.15 CTS 201 2031

(Piperidine)

c5 h„n+ (CH2 )5 NH 7.85 TC 171 2184

(Piperidine)

c5 h12 n+

c5 h12 n+ C4 H9(CH3 )N2 H2 nh2 9.0± 0.1 PI 171 1141

(1-Methyl-l-n -butylhydrazine)

c5 h12 n+ sec-C4 H9 CH(NH2 )COOH cooh 9.9 ±0.2 LE 150 88

(Isoleucine)

c5 h13 n+

c5 h13 n+ C4 H9(CH3 )N2 H2 NH 10.5 ±0.1 PI 167 1141

(1-Methyl-l-rc -butylhydrazine)

c6 h4n+

C6 H4H + C5 ILCN 9.44 SL 267* 126

(Cyanocyclopentadienyl radical)

c6h6n+

c6 h6 n+ c6 h5 nh

(Anilino radical)

8.26 ± 0.1 SL 1011

c6 h6 n+ c5 h4 nch2 (2-Pyridylmethyl radical)

8.17 ± 0.1 SL (a) 1011

c6 h6 n+ c5 h4 nch2 (3-Pyridylmethyl radical)

7.92 ±0.1 SL (a) 1011

C6 ILN+ CsIRNCH,

(4-Pyridylmethyl radical)

8.40±0.15 SL (a) 1011

C6H6 N+ Cs^NCHg

( 2 -picoline)

H 12.38 ±0.1 SL 258 1011

c6 h6 n+ c5 h4 nch3 (3-picoline)

H 12.31 ±0.1 SL 259 1011

CeHeN* C5 H4 NCH3 (4-picoline)H 12.22 ± 0.1 SL 254 1011

100
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C6 H7 N+ (Aniline) Heat of formation 202 kcal mol-1

C6 H7 N+ (2-Picoline) 232 kcal mol-1

C6 H7 N+ (3-Picoline) 236 kcal mol-1

C6 H7 N+ (4-Picoline) 233 kcal mol-1

c6 h7 n+

(Aniline)

ChH5 NH2 7.69 ±0.02 PI 202* 1166

c6 h7 n+

(Aniline)

cb h5 nh2 7.70^0.02 PI 202* 182, 159,

416

c6 h7 n+

(Aniline)

c6 h5 nh2 7.67 ±0.03 PI 202* 1160

c«h7 n+

(Aniline)

ChH5 NH2 8.8±0.1 PI 1160

c«h7 n+

(Aniline)

c«h5 nh2 10.2 ±0.1 PI 1160

c6 h7 n+ (Aniline)

CeHsNH, 11.8 ± 0.1 PI 1160

c6 h7 n+

(Aniline)

c6 h5 nh2 12.6± 0.1 PI 1160

c6 h7 n+

(Aniline)

c6 h5 nh2 7.69 PI 202* 1159

c6 h7 n+

(Aniline)

c6 h5 nh2 8.89 ±0.1 PE 1159

c6 h7 n+

(Aniline)

Cells NH2 9.2 ±0.1 PE 1160

c6 h7 n+

(Aniline)

CeH5 NH2 10.3 ±0.2 PE 1160

c6 h7 n+

(Aniline)

C6 H5NH2 8.32 SL 217 1066

c«h7 n+

(Aniline)

CeHsNH2 7.76 CTS 204 1281

c6 h7 n+

(Aniline)

Cs H5 NH2 8.18 TC 213 1160 c6 h7 n+

(Aniline)

c6 h5 nh2 8.26 TC 215 1160

c6 h7 n+

(Aniline)

c6 h5 nh2 9.1 TC 1160 c6 h7 n+

(Aniline)

CeHsNH, 9.2 TC 1160 c6 h7 n+

(Aniline)

CeH5 NH2 10.0 TC 1160

c«h7 n+

(Aniline)

c6 h5 nh2 10.2 TC 1160 c6h7 n+ c6 h5 nh2 8.58 TC 223 136

(Aniline)

c«h7 n+ (2-Picoline)C5H4NCH3 9.02 ±0.03 PI 232* 182

c«h7 n+

(2-Picoline)

C5H4NCH3 9.56 ±0.05 SL 245 217

ChH7 N+ (3-Picoline)

C5H4NCH3 9.04 ±0.03 PI 236* 182 c6 h7 n+

(4-Picoline)

C5H4NCH3 9.04 ±0.03 PI 233* 182

ChH7 N + (4-Picoline)C5H4NCH3 9.67 ±0.05 SL 247 217

c6 h7 n+

(Acetanilide)

CeHsNHCOCHe 8.88 ± 0.15 SL 1126

101
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-1

) C6 Hi3 N+ (Cyclohexylamine) Heat of formation 181 kcal mol-1

C«H13 N+ rc-C3 H7 CH=NC2 H5 9.00 PE 1130

c«h13 n+ n-C3 H7 CH=NC2 H5 10.15 PE 1130

c6 h13 n+ n-C3 H7 CH=NC2 H5 11.15 PE 1130

c6 h13 n+ n-C3 H7 CH=NC2 H5 12.59? PE 1130

c6 h13 n+ n-C3 H7 CH=NC2 H5 13.37 PE 1130

c6 h13 n+ n-C3 H7 CH=NC2 Ho 15.34 PE 1130

c6 h13 n+ n-C3 H7 CH=NC2 H5 19.17? PE 1130

c6 h13 n+ iso-C3 H7 CH=NC2 H5 8.94 PE 1130

c6 h13 n+ iso-C3 H7 CH=NC2 H5 10.12 PE 1130

c6 h13 n+ t5o-C3 H7 CH=NC2 H5 11.08 PE 1130

c6 h13 n+ j5o-C3 H7 CH=NC2 H5 12.54 PE 1130

c6 h13 n+iso -C3 h7 ch=nc2 h5 13.28 PE 1130

c«h13 n+ iso-C3 H7 CH=NC2 H5 14.59 PE 1130

c6 h13 n+ iso-C3 H7 CH=NC2 H5 19.17? PE 1130

c«h13 n+ C6 Hn NH2 8.86 PE 181* 1130

(Cyclohexylamine)

ChH13 N+ cb h„nh2 10.25 PE 1130

(Cyclohexylamine)

c«h13 n+ C«H„NH2 14.56 PE 1130

(Cyclohexylamine)

c«h13 n+ CeHnNHa 18.17 PE 1130

(Cyclohexylamine)

C6 H13 N+ (CH2 )bNH 8.5 EC 184 218

(Hexamethylenimine)

(ti-C3 H7)2 NH+ Heat of formation 153 kcal mol 1 (iso-C3 H7 )2 NH+ 148 kcal mol 1 (C2 H5 )3 N+ 147 keal mol-1

c6 h15 n+ (n-C3 H7 >2 NH 7.84 + 0.02 PI 153* 159, 182

ChH15 N+ (iso-C3 H7 )2 NH 7.73 + 0.03 PI 148* 159, 182

c6 h15 n+ (C2 H5 )3 N 7.50 ±0.02 PI 147* 159, 182

C«H15 N+ (C2 h5 )3 n 7.84 PE 155 1130

c6 h15 n+ (C2 h5 )3 n 10.79 PE 1130

c6 h15 n+ (C2 h5 )3 n 14.36 PE 1130

c8 h15 n+ (C2 H^N 15.37 PE 1130

c6 h15 n+ (C2 H3 )3 N 19.92? PE 1130

c6 h15 n+ (C2 H5)3 N 7.68 + 0.1 RPD 151 2158

c6 h15 n+ (C2 h5 )3 n 8.18+0.1 RPD 2158

c8 h15 n+ (C2 h5 )3 n 8.55 ±0.1 RPD 2158

c6 h15 n+ (C2 h5 )3 n 8.95 ±0.1 RPD 2158

c6 h15 n+ (C2 H5)3 N 9.40 ±0.1 RPD 2158

C6 H15 N+ (C2 h3 )3 n 7.85 ±0.07 SL 155 14

c6 h15 n+ (C2 h5 )3 n 9.35 CTS 190 2031

cyclo-C6 H5 CN+ Heat of formation 277 kcal mol 1

c7 h,n+ CbHsCN 9.705 ±0.01 PI 277* 182

(Benzonitrile)

c7 h5 n+ CbHsCN 10.09 SL 286 1066

(Benzonitrile)

c7 h5 n+ CbH5 CONH2 h2 o 10.19± 0.10 SL 271 1126

(Benzamide)

C7 H5N + (C6 H5 )2 C2 N2 0 CbHsNCO 10.2± 0.1 SL 1125

(3,5-Diphenyl-l,2,4-oxidiazole)

102
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -

*) c7 h7 n+

c-h7 n+ c6 h5 ch2 nh2 h2 9.35 ±0.07 PI 236* 1147

(Benzylamine)

c7 h8 n+

c7 h8 n+ c6 h5 ch2 nh2 H 9.21 ±0.07 PI 180* 1147

(Benzylamine)

c7 h8 n+ gjech-nh. H 9.3± 0.1 PI 182* 1160

(Benzylamine)

c7 h«n+ c6 h.-,ch2 nh2 H 1 1 .65 ± 0.1 PI 1160

(Benzylamine)

C7 Hh N+ c6 h5 nhch3 H 11.0±0.1 PI 226* 1160

(A-Methylaniline)

C7 H9N+ (./V-Methylaniline) Heat of formation 192 kcal mol 1 C7 H9 N+ (m-Toluidine) 189 kcal mol-1

C7 H9N+ (Lutidine) 218 kcal mol-1

C7 H9 N+ GH5 CH2 NH2 7.56 ±0.02 PI 194 159

(Benzylamine)

C7 H9 N+ ChH5 CH2 NH2 8.64 ±0.02 PI 219 1166, 1160

(Benzylamine)

c7 h9 h+ c6 h5 ch2 nh2 9.03 ±0.05 cs 228 2025

(Benzylamine)

C7 H9 N+ GHsNHCH.! 7.34 ±0.02 PI 193* 1166, 1159

(A-Methylaniline)

C7 H9 N+ GH5 NHCH3 7.30 ±0.05 PI 192* 1160

(A-Methylaniline)

C7 H9 N+ GH5NHCH3 8.55 ±0.05 PI 1160

(A-Methylaniline)

C7 H9 N+ GH5NHCH3 10.0±0.1 PI 1160

(A-Methylaniline)

C7 H,N+ GH-,NHCH3 8.44± 0.1 PE 1159

(A-Methylaniline)

C7 H9 N+ GH5NHCH3 9.0 ± 0.1 PE 1160

(A-Methylaniline)

C7 H9 N+ GH5 NHCHi3 10.0 ± 0.2 PE 1160

(A-Methylaniline)

C7 H9 N+ GH5NHCH3 7.58 CTS 199 1281

(A-Methylaniline)

C7 H9 N+ ChH4CH:! NH2 8.38 SL 210 1066

(o-Toluidine)

C7 H9 N+ C«H4CH:i NH2 7.50 ±0.02 PI 189* 1166

(m-Toluidine)

C7 H9 N+ GH4 CH3 NH2 8.27 SL 207 1066

(m-Toluidine) c7 h9 n+ ggch3 nh2 7.85 ±0.05 CS 197 2025

(m-Toluidine)

C7 H9 N+ C.iHjCIliNM- 8.14 SL 204 1066

(p-Toluidine)

C7 H9 N+ GH4CH3NH., 8.16 TC 204 2194

(Toluidine)

C7 H9 N+ C;> I l;j N( CH;) ) 2 8.85 ±0.02 PI 218* 182

(2,3-Lutidine)

C7 H9 N+ C5 H3 N(CH3 )2 8.85 ±0.03 PI 218* 182

(2,4-Lutidine)

C7 H9 N+ C5 H3 N(CH3 )2 8.85 ±0.02 PI eg r-H CO * 182

(2 ,6-Lutidine)

103
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c8 h6 n+

C8 Hk N+ Cb H4 CNCH2 8.58±0.1 SL 267 69

(m-Cyanobenzyl radical)

ChHbN+ cb h4 cnch2 8.36 ±0.1 SL 262 69

(p-Cyanobenzyl radical)

c8 h7 n+

ChH7 N+ c«h5 ch2 cn 9.40 ±0.05 cs 259* 2025

(Benzyl cyanide)

C8 H7 N+ Ch H4 CH3 cn 9.66 ±0.05 cs 271* 2025

(m-Tolunitrile)

C8 H7 N+ ChHiCHisCN 9.76 SL 273* 1066

(p-Tolunitrile)

Ck H7 N+ Cfi H4 CH3 CN 9.64 TC 270 2194

(Tolunitrile)

C8 H7 N+ CsH-N 7.27 TC 136

(Pyrrocoline)

c8h10n+

C«Hi () N+ C6 H5 N(CH3 >2 H 10.75±0.05 PI 217* 1160

(A,A-Dimethylaniline)

cyc^o-C6 H5 NHC2 H^ Heat of formation 193 kcal mol l cyclo-C6H5 N(CH3 )£ 185 kcal mol' l C8 Hu N+ Cb H5 NHC2 H5 7.56 CTS 193* 1281

(A-Ethylaniline)

ChHu N+ C«H5 N(CH3>2 7.14±0.03 PI 186* 1166, 1159

(A,A-Dimethylaniline)

C8 H,,N+ Ck H5 N(CH3 )2 7.10±0.05 PI 185* 1160

(/V,/V-Dimethylaniline)

C8 H n N+ Cb H5 N(CH3 >2 7.75 ±0.05 PI 1160

(AyV-Dimethylaniline)

CsHn N+ C«H4 N(CH3 >2 8.6±0.1 PI 1160

(A^V-Dimethylaniline)

CsH n N+ ChH:,N(CH3 )2 9.8±0.1 PI 1160

(AyV-Dimethylaniline)

ChHuN+ C6 H5 N(CH3 )2 8.14±0.1 PE 1159

(AyV-Dimethylaniline)

Cs HiiN + C«H5 N(CH3 >2 8.5±0.1 PE 1160

C/VyV-Dimethylaniline)

C8 H,,N+ C6 H5 N(CH3 )2 9.7 ± 0.2 PE 1160

(AL/V-Dimethylaniline)

C8 Hn N+ Cb H5 N(CH3)2 7.44 CTS 193 1281

(A,A-Dimethylaniline)

C8 Hn N+ C6 H3 N(CH3 )> 7.2 CTS 187 2037

(AVV-Dimethylaniline)

c8h19n+

C8 H1!( N+ (n-C4 H9 )2 NH 7.69 ±0.03 PI * o 159, 182

104
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c9h13 n+

c9 h13 n+ c6 h5 nhc3 h7 7.54 CTS rH COCO * 1281

(/V-n-Propylaniline)

C9 H13 N+ ChH5 N(CH3 )C2 H5 7.37 CTS 185* 1281

(A-Ethyl-/V-methylaniline)

C9 H13 N+ C6 H4 N(CH3 )2 CH3 7.37 CTS 184* 1281

(ACV-Dimethyl-o-toluidine)

C9 H13 N+ C6 H4 N(CH3 >2 CH3 7.35 CTS 181* 1281

(AVV-Dimethyl-m-toluidine)

C9 H)3 N+ C«H4 N(CH3 ) 2 CH3 7.33 CTS 181* 1281

(AC/V-Dimethyl-p-toluidine)

c9h21 n+

C9 H21 N+ (n-C3 H7 )3 N 7.23 PI 207* 159, 182

c10h15 n+

c10 h15 n+ c«h3nhc4 h9 7.53 CTS 183* 1281

(A-n-Butylanihne)

C10 H15 N+ C«H3 N(C2 H5>2 6.99 CTS 172* 1281

(/V,/V-Diethylaniline)

C,oH15 N+ C6H4 N(CH3)2 C2 H5 7.38 CTS * 1281

(AVV-Dimethyl-p-ethylaniline)

C10H15 N+ C6 H3 N(CH.3 )4 7.17 CTS 171* 1281

(A^ACZA-Tetramethylaniline)

C 10 H15 N+ C6 H3 N(CH3 )4 7.22 CTS 173* 1281

(AC/V,2,6-Tetramethylaniline)

C10 H13 N+ C«H3 N(CH3 )4 7.25 CTS 172* 1281

(AyV,3,5-Tetramethylaniline)

CnH17H+

C„H17 N+ C6 H4 N(C2 H5 >2 CH,i 6.93 CTS 164* 1281

(/V,./V-Diethyl-p-toluidine)

Cn H17 N+ Cfi H4 N(CH3 >-C3 H7 7.41 CTS 174* 1281

(AC/V-Dimethyl-p-isopropylaniline)

c12 h„n+

C12 H„N+ (C6 H5 )2 NH 7.25 ±0.03 PI 223* 1140

(Diphenylamine)

c12 h19n+

C12 H19 N+ C6H5 N(C3 H7 )2 6.96 CTS 163* 1281

(AC/V-Di-n-propylaniline)

C12 H19 N+ C6 H4 N(CH3 )2 C4 H9 7.43 CTS 166* 1281

(A^A-Dimethyl-p-tert-butylaniline)

c14 h23 n+

C14 H23 N+ CtjHsNlOHob 6.95 CTS 153* 1281

(AVV-Di-n-butylaniline)

c18 h15 n+

C, 8 H15 N+ (C(iH3 ) 3 N 6.86 ±0.03 PI 243* 1140

(Triphenylamine)

105
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

chn2+

CHN+ CH2 N2 H 14.8 ± 0.1 VC 338 314

(Diazomethane)

CHN.+ ch2 n2 H 14.2±0.1 VC 355 314

(Diazirine)

CH2 N2 (Diazomethane) Heat of formation 257 kcal mol-1

CH2 NJ (Diazirine) 314 keal mol-1

CH,N+ ch2 n2 8.999 ±0.001 S 257* 1169

(Diazomethane)

CH2 N+ ch2 n2 9.03 ±0.05 VC 257 314

(Diazomethane)

CH2 N+ ch2 n2 9.2±0.3 NS 261 464

(Diazomethane)

ch2 n+ ch2 n2 10.18±0.05 VC 314* 314

(Diazirine)

CH2 N+ ch3 n,h3 H2 + 2H 15.2 ± 0.2 SL 269 424

CH3 IV£

ch3 n+ ch3 n2 h3 h2 +h 9.2±0.2 PI 183 1141

CH3 N+ ch3 n,h3 H, + H 11.9±0.3 SL 245 424

CH3 N+ ch3 n2 h3 3H? 14.8 ± 0.3 SL 208 424

ch3 n+ ch3 n=nch3 ch3 9.0±0.1 SL 217 304

ch3 n+ (CH3 )-2 N2 H2 ch.3 + h2 9.7 ± 0.5 SL 212 424

(1,2-Dimethylhydrazine)

ch4 n^

ch4 n2+ ch3 n2 h3 H> 9.4±0.1 PI 239 1141

CH,N+ ch3 n2 h3 h2 11.2 ±0.1 PI 1141

ch4 n+ ch3 n2 h3 Ho 10.4±0.2 SL 262 424

ch4 n.i (CH3 )..N,H2 ch4 9.7±0.3 SL 263 424

(1,2-Dimethylhydrazine)

CILN+ C4 H9 (CH3 )N2 H2 9.6±0.1 PI 1141

(1 -Methyl-1 -n-butylhydrazine)

CH4 N+ C4 H9 (CH3 )N2 H2 11.0±0.1 PI 1141

( 1 -Methyl-1 -n-butylhydrazine)

CH5 N1

ch5 n+ ch3 n2 h3 H 9.2±0.1 PI 183 1141

ch5 n+ ch3 n2 h3 H 10.9 ± 0.2 PI 1141

ch5 n+ ch3 n2 h3 H 10.2±0.1 SL 206 424

CH5 N+ ( LH3 12 N2 H2 ch3 8.4 ±0.1 PI 180 1141

(1,1-Dimethylhydrazine)

ch5 n+ (CH3 )2 N2 H2 CHi 9.8 ±0.1 PI 1141

( 1 ,1-Dimethylhydrazine)

CH,N.| (CH3 ) 2 N2 H2 CH3 9.7 ± 0.2 SL 210 424

( 1 ,1 -Dimethylhydrazine)

CH-.N+ (CH3 ) 2 N2 H2 ch3 9.1 ± 0.2 SL 198 424

( 1 ,2-Dimethylhydrazine)

CH,N.t C4 H9(CH3 )N2 H2 9.0± 0.1 PI 1141

(1 -Methyl- 1 -n-butylhydrazine)

CH,N.r C4 H9 (CH3 )N2 H2 10.6±0.1 PI 1141

(1-Methyl-l -n-butylhydrazine)

106
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-'*) CHfi N£

CH«N+ CH:i N2 H:i 8.00 ±0.06 PI 207 2173, 1141

CH«N+ CH3 N,H3 11.1 ±0.1 PI 1141

CH«N+ CH:i N2 H:i 8.63 ±0.1 SL 222 424

c2 h5 ni

c,h5 n+ (Ch3 )3 n2 h CH( + H. 11.1 ±0.4 SL 242 424

c2 h5 n+ <CH3 )4 N2 ch3 +ch4 ? 12.4±0.2 SL 287 424

ch3 n=nch+ Heat of formation 243 kcall mol-1

c2 h«n+ CHi N=NCH:i 8.65±0.1 SL 243* 304

c2 h6 n+ (CH3 )2 N2 H2 h2 9.5±0.1 PI 239 1141

(1,1-Dimethylhydrazine)

c2 h6 n+ (CH3)2 N2 H2 h2 11.4 ± 0.2 PI 1141

(1,1-Dimethylhydrazine)

c2 h6 n2+ (CH3)4 N2 c2 h« 10.5 ± 0.SL 279 424

c2 h6 n+ (CH:! )4N2 2CH:i ? 13.3 ± 0.5 SL 257 424

C2 H«N2+ C4 H!) (CH3 )N2 H2 c3 h8 9.5 ± 0.2 PI 248 1141

(1-Methyl-l -n-butylbydrazine)

C2 H6 N+ C4 Hh(CH.()N2 H2 C3 Hh 10.6±0.1 PI 1141

(1-Methyl-l n-butylhydrazine)

c..h 7 n.

C2 H7 N+ (CH:s )2 N2 H 6.6±0.3 SL (a) 67

(1,1-Dimethylhydrazyl radical)

c2 h7 n+ (CH:()-2 N2 H2 H 8.7 ± 0.2 PI 168 1141

(1 ,1-Dimethylhydrazine)

c2 h7 n+ (CH:( >2 n2 h2 H 11.0±0.2 PI 1141

( 1 ,1-Dimethylhydrazine) c2 h7 n2+ (CHahN.H, H 10.2 ± 0.2 SL 203 424

(1,1-Dimethylhydrazine)

C2 H7N+ (CH3 ),N2 H2 H 10.0 ± 0.3 SL 198 67

(1,1-Dimethylhydrazine)

c2 h7 n2+ (CH3 )2 N2 H2 H 9.3 ± 0.2 SL 183 424

(1,2-Dimethylhydrazine)

C2 H7 N+ (CH3 )3 N2 H CH:i 9.4±0.1 SL 203 424

c2h7n+ C4 H9 (CH3 )N2 i| 9.1 ±0.1 PI 1141

(1-Methyl-l--n-butylhydrazine)

c2 h7 n+ C4 H9 (CH3 )N2 H2 10.7 ±0.1 PI 1141

(1-Methyl-l n-butylhydrazine)

c2 h8 n+

c2h8n+ (CH3 )2 N2 H2 7.67 ±0.05 PI 197 1141, 2173

(1,1-Dimethylhydrazine)

c2 h8 n+ (CH3 ) 2 N2 H2 10.6 ±0.1 PI 1141

(1,1-Dimethylhydrazine)

c2 h8 n+ (CH3 )2 N2 H2 11.2 ± 0.

PI 1141

(1,1-Dimethylhydrazine)

c2 hk n.+ (CH3 >2 N2 H2 8. 12 ±0.1 SL 207 424

(1,1-Dimethylhydrazine)

C2 HhN+ (CH3 )2 N2 H2 7.75±0.1 SL 200 424

(1,2-Dimethylhydrazine)

107
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c3 H7 m

C3 H7 N2+ (CH3 )3 N2 H h2 + h 10.7±0.1 SL 214 424

C3 H7 N+ (CH3 )4 N2 ch3 +h2 10.7±0.1 SL 230 424

C3H8 N|

C3H8 N+ (CH3 )3 N2 H h2 8.2±0.1 SL 208 424

C3H8 N+ (CH3 )4 N2 ch4 8.9±0.1 SL 240 424

c3 h9 n^

C3 H9 N+ (CII-s hN2 H H 8.9±0.1 SL 172 424

c3 h9 n2+ (C2 h5 >,n2 h7 ch3 8.0±0.1 PI 160 1141

(1 ,1 -Diethylhydra:zine)

C3 H9 N+ (C2 H5 >2 N2 H2 ch3 8.5±0.2 PI 172 1141

(1,1-Diethylhydrazine)

C3 H9 N+ (CH3 )4 N2 ch3 9.1 ±0.1 SL 193 424

C3 Hi0N^

C3H10N+ (CH3 )s N2 H 7.93±0.1 SL 202* 424

c4h3 nj

c4 h3 n+ c4 iln2 H 13.01 ±0.10 EVD 295 1406

(Metadiazine)

c4 h3 n+ c4 h4 n2 H 13.68±0.10 EVD 310 1406

(Paradiazine)

C4H4 N£

c4 h4 n+ c4 h4 n2 9.77 ±0.05 EVD 292* 1406

(Orthodiazine)

c4 h4 n+ c4 h4 n2 10.04 ±0.05 EVD 298* 1406

(Orthodiazine)

c4 h4 n+ c4 h4 n2 9.83 ±0.05 EVD 274* 1406

(Metadiazine)

CJLN+ C.H.N, 10. 12 ±0.05 EVD 280* 1406

(Metadiazine)

c4 h4 n2+ c4 h4 n2 9.59 ±0.05 EVD 268* 1406

(Paradiazine)

c4 h4 n2+ c4 h4 n2 10.09 ±0.05 EVD 280* 1406

(Paradiazine)

C4 HioN2

C4 HioN+ (C2 H.->)>N2 H2 h2 8.3 ± 0.2 PI 200 1141

(1,1-Diethylhydrazine)

C4 HhNJ

C4 Hn N+ (C2 H5 )2 N2 H2 H 8.9±0.1 PI 162 1141

(1,1-Diethylhydrazine)

C4 Hn N+ (C2 H5 )2 N2 H2 H 11.1 ±0.1 PI 1141

(1,1-Diethylhydrazine)

C4 Hu N2+ ra-C4 H9(CH3 )N2 H2 CH:i 8.0±0.1 PI 155 1141

(1 -Methyl- 1-n-butylhydrazine)

C4 Hn N+ n-C4 H9 (CH3 )N2 H2 ch3 9.6 ±0.2 PI 1141

(1-Methyl-l-n-butylhydrazine)

108
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C4H12N2

C4 H12 N2+ (C2 H5 )2 N2 H2 7.59 ±0.05 PI 184 1141

(1,1-Diethylhydrazine)

c4 h, 2 n2 (CH,).,n2 7.76 ±0.05 SL 196* 424

c5 h6n^

c5 h6 n2+ c,h( nnh2 8.97 ±0.05 SL 244* 217

(4-Aminopyridine)

c5 h12 N£

C5 HI 2 N2+ n-C 4 H9 (CH3 )N2 H2 H, 8.0 ± 0.2 PI 188 1141

(1-Methyl-l-n-butylhydrazine)

C5 HI 2 N+ n-C4 H9 (CH3 )N2 H2 h2 10.6 ± 0.1 PI 1141

(1-Methyl-l-n-butylhydrazine)

c5 h13 nj

C5 H13 N2 n-C4 H9(CH3)N2 H2 H 8.0±0.3 PI 136 1141

(1-Methyl-l-n-butylhydrazine)

C5 H13 N+ n-C4 Hh (CH3 )N2 H2 H 10.4±0.1 PI 1141

(1-Methyl-l-n-butylhydrazine)

C5 H13 N2+ n-C4 H9 (CH3 )N2 H2 H 1 1 .3 ± 0.

PI 1141

(1-Methyl-l-n-butylhydrazine)

C5H14NJ

C5 H14 N+ n-C4 H9 (CH3 )N2 H2 7.62 ±0.05 PI 180 1141,2173

( 1 -Methyl-l-n-butylhydrazine)

C5 H,4 N+ n-C4 H9 (CH3 )N2 H2 10.6 ± 0.1 PI 1141

(1-Methyl-l-n-butylhydrazine)

c6 h8 nj

CbH8 N2+ C6 H4 (NH2 )2 8.00 SL 214 1066

(o-Benzenediamine)

C6 H8 N+ Cfi H4 (NH2 )2 7.96 SL 214 1066

(m-Benzenediamine)

C6 HsN+ C6 H4 (NH2 )2 7.58 SL 205 1066

(p-Benzenediamine)

C6 H8 N2+ ChH5 N2 H3 7.64 ±0.02 PI 233 1166

(Phenylhydrazine)

C10H16N2

C10 H16 N+ (CH3 >2 NC«H4N(CH3 )2 6.9 GTS 180* 2037

(p-6i5 (Dimethylamino)benzene)

CHN+2

CHN+ 2 CH3 N3 2H? 34 SL 737 340

CH3N+

CH3 N+ ch3n3 9.5±0.1 SL 276* 340

323-656 0-69—8

109
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c 10 h15 bn2+ 2 c10 h15 bn,

(l,3-Dimethyl-2-phenyl-l,3,2-diazaborolidine)

C10H15BH2 2

23.5+1 NS 1418

C6 H18 BN£2

ChH18 BN+2 c6 h18 bn3 21 ± 1 NS 1418

( tris( Dimethylamino)borane)

0+

(

4 S3/ 2 ) Heat of formation 374 kcal mol-1

0+(2 B) 450 kcal mol 1 G+

(

2 P) 489 kcal mol-1

0+

( 4 S3/ 2 ) 0 13.618 S 374* 2113

0+ 0 13.90 + 0.2 LE 380 79

0+ 0 13.9 ± 0.2 LE 380 2021

0+ 0 13.6±0.5 LE 373 2128

0+ 0 13.7 + 0.5 LE 375 2130

0+

(2 D) 0 16.94 S 450* 2113

0+

( 2 P) 0 18.64 S 489* 2113

0+ 0, 0- 17.3 + 0.10 RPD 375 288

0+ 0, 0- 17.2 RPD 372 200

0+ 0, 0- 17.25 + 0.1 FPD 374 2014

0+ o2 0- 17.1 ±0.2 LE 370 79

0+ 0, 0- 17.264 + 0.009 D 374 6

0+

( 2 D) 0, 0

- 20.7 ± 0.4 PI 453 163

0+

(2 D) 0, 0- 20.4 ±0.1 FDP 446 2014

0+

( 2 D) o> 0

- 20.3 ±0.2 LE 444 79

0+ o. 0

- 21.30±0.03 RPD 288

0+ 0, 19.7 ±0.1 FDP 2014

o o2 0 18.8 ± 0.4 PI 374 163

0+ 0, 0 18.99 ±0.05 RPD 378 288

0+ o. 0 18.8 ±0.1 FDP 374 2014

0+ o. 0 18.9 ± 0.2 LE 376 79

o o2 0 20.42 ±0.04 RPD 288

0+ o2 OOD) 20.55 ±0.1 FDP 369 2014

0+ 0, 0 22.03 ±0.03 RPD 288

0+

( 2 D) o2 0 22.0±0.1 FDP 448 2014

0+ o2 0('S) 23.4 ± 0.5 PI 383 163

0+ h2 o2 17.0 ±1.0 LE 37

0+ h2 o2 28.3 ±1.0 LE 37

0+ CO c- 23.41 ±0.17 RPD 2180, 2191

0+ CO c- 23.7 RPD 200

0+ CO c- 23.6 ±0.2 FDP 1378

0+ CO c- 24.78 ±0.23 RPD 374 2180. 2191

no
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

0+ C02 CO 19.2 ±0.3 PI 375 163

0+ CO, CO 19.0± 0.3 LE 371 2021

CL CO, CO? 20.3 ±0.2 PI 163

0+ CO, CO? 20.3 ±0.4 LE 2021

CL(2 D) CO, CO 22.3 ±0.4 PI 447 163

CL(2 D) CO, CO 22.4 ±0.6 LE 449 2021

CL(2 P) CO, CO 24.6 ±0.3 LE 500 2021

0+ NO N 19.5 ± 0.2 PI 358 163

CL NO N 20.11 ±0.03 RPD 372 328

CL NO N 20.3 ±0.5 LE 377 2021

CL NO N(2 D) 20.7 ± 0.5 PI 331 163

CL N,0 N, 15.3 ± 0.4 PI 372 163

0

+ N,0 N, 15.33 ±0.02 SL 373 58

CL N,0 N, 15.4 ± 0.

MSD 375 1451

CL NO, NO 17.6 ±0.2 PI 392 163

CL NO, NO 17.0 RPD 378 2018

CL no2 NO 17.7 RPD 2018

0+ NO, NO 18.9 RPD 2018

0+ NO, NO 18.4±0.5 LE 411 2021

CL(2 D) NO, NO 20.5 ±0.2 PI 459 163

0+

( 2 D) no2 NO 20.3 RPD 454 2018

CL NO, N+0 24.2 ±1 LE 393 2021

CL CH.NO, 14.50±0.16 VC 90

CL SO, SO 20.6 SL 418

CL C10:i F 22 ±1 SL 53

0+ POCL 13 ± 2 NS 1101

<L (x 2 nf/) Heat of formation 278 kcal mol 1 Of (a 4 nM) 371 kcal mol-1

Oi (A mu ) 388 kcal mol-1

Oi (b 4X~g ) 419 kcal mol-1

o+(X 2 ny ) o2 12.063 ±0.001 PI 278* 2048

o2+ (x 2 ng ) 0, 12.065 ±0.003 PI 278* 1032

o2+ (x 2 n,) 0, 12.078 ±0.005 PI 279* 2013

oi(X 2 a;

) 02 12.075 ±0.01 PI 278* 182, 416

o2+ (x mg ) 02 12.1 ±0.1 PI 279 230

o.+(X 2 n9 ) 02 12.2 ± 0.3 PI 281 163

o2+ (X 2 n9) o2 12.10 PE 279 1108

0.;(X 2 n;/ ) 0, 12.04 ±0.02 EM 278 1094

o.+(X 2 nf; ) 02 12.20 ±0.05 EM 281 116

o2+ (X 2 n9) 02 12.21 ±0.04 RPD 282 287, 288

o+(X 2ng) 02 12.20 RPD 281 119

o+(X 2 n9 ) o2 12.15 ±0.1 SL 280 31

o2+ (X 2 ng ) o2 12.31 ±0.1 SL 284 364

o+(X 2 ny ) o2 12.2 VC 281 2136

o+(X 2 ns > 02 12.45 ±0.10 cs 287 383

o+(X 2 ng) o2 12.23 ± 0.07 LE 282 79

o+(X 2 nff ) 0, 12. 16 ±0.08 LE 280 1029

o+(X 2 n<,) 02 12.23 ± 0.08 LE 282 3

o2+ (X 2 n9 ) o2 12.5±0.3 NS 288 2188

o2+ (X 2 ny ) o2 12.5 EC 288 218

111
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

02+ o2 13.1 RPD 119

(Autoionization)

0+ 02 13.6 RPD 119

(Autoionization)

02+ 02 14.3 ±0.5 PI 163

(Autoionization)

0.+(a 4 II,( ) o2 16.1060 S 371* 2099

0+(a 4 n„) o2 15.9 ± 0.2 PI 367 163

0+(a 4nu ) 02 16.26 PE 375 1108

02+ (a 4nu ) 02 16.42 PE 379 1130

0+(a 4nu ) 0, 16.24±0.03 EM 375 116

0+(a 4 nu ) 02 16.30±0.03 RPD 376 287. 288

0+(a 4 n„) o2 16.2 RPD 374 119

0+(a 4 n„) 02 15.7 ± 0.5 LE 362 79

o2+ (A 2 nM ) o2 16.8261 S 388* 2099

o+(A 2 nu ) 02 16.9±0.3 PI 390 163

o+(A 2 n„) o2 17. 12 ±0.04 EM 395 116

o2+ (A 2 nu ) o2 17. 18 ±0.02 RPD 396 287, 288

o+(A 2 nl( ) 02 17.1 RPD 394 119

o+(A 2 nu ) 02 17.0 VC 392 2136

0+(6 4X

-

) o2 18. 1724 ±0.0006 S 419* 2099

02+

(6

4 X-) a 18.8±0.4 PI 434 163

0 o2 17.99 PE 415 1130

oid%-> 02 18.18 PE 419 1108

0?(b 4Ig

) 02 18.40 ±0.03 EM 424 116

02 (6

4Xg) 02 18.42 ±0.02 RPD 425 287, 288

Ol(b 41~) Oo 18.1 RPD 417 119

o2+

(6

4X-) o2 18.0±0.5 LE 415 79

02+ 02 20.12 PE 464 1130

0.r 0, 20.31 PE 468 1108

02+ 02 21.2 ±0.4 PI 489 163

02+ o2 21.29 ±0.04 EM 491 116

02+ 02 21.34 ±0.02 RPD 492 :287, 288

02+ H>02 H, 15.8±0.5 LE 332 37

02+ h2 o2 2H 20.5 ±0.5 LE 336 37

02+ so. s 17.5±0.3 SL 266 418

02+ C103 F 15 ± 1 SL 54

Oj Heat of formation 318 kcal mol-1

03+ 03 11.7? PI 304 416

03+ 03 12.3 ± 0.PE 318* 1441

03+ 0, 12.52 ±0.05 PE 1441

03+ 03 13.52 ±0.05 PE 1441

o:r o3 16.9 ±0.5 PE 1441

03+ 03 19.24 ±0.1 PE 1441

03+ 03 12.89±0.10 RPD 331 20

03+ Ch 12.80 ±0.05 EVD 329 77

112
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) OH+ Heal of formation 312 kcal mol 1

H0+ OH 13.17 ±0.1 SL 313* 67

H0+ H2 0 H 18.3 ± 0.2 PI 312* 427

H0+ h2 o H 18.59 ±0.08 SL 319 2066

HO H,0 H 18.19 SL 310 67

HO H2 02 OH 15.60 ±0.08 SL 318 2066

HO h2 o2 OH 15.35 ± 0. 10 SL 312 37

HO CH3 COOH 15.1 SL 298

h2 o+ Heat of formation 233 kcal mol 1 h2 o H,0 12.614±0.005 PI 233* 2013

H,0 h2 o 12.597 ± 0.010 PI 233* 1253

h2 o H,0 12.59 ± 0.01 PI 233* 182, 416

h2 o H2 0 12.62 ± 0.02 PI 233* 1103

H,0+ H,0 12.5 ±0.1 PI 230 230

H2 0+ H.O 12.6 ± 0.1 PI 233 427

H.0+ H»0 12.61 PE 233 1130

H,0+ H,0 12.60±0.01 RPD 233 463

H2 0+ H,0 12.59±0.05 RPD 233 1372

H,0+ H,0 12.63 RPD 233 97

H>0+ H2 0 12.6 RPD 233 2060

H,0+ h2 o 12.69 ±0.08 SL 235 2066

h2 o h2 o 12.67 VC 234 2136

h2 o+ h2 o 14.23 PE 1130

H>0+

( 2 Ai) H,0 14.35 ±0.03 RPD 273 463

h2 o H2 0 14.2 RPD 2060

H2 0+(2B2 ) h2 o 16.34 ±0.06 RPD 319 463

h2 o+ h2 o 16.2 RPD 2060

h2 o+ h2 o 18.02 PE 1130

h2 o+ H,0 20.3 ±0.4 PI 427

h2 o+ H2 02 0 14.09±0.10 SL 233 37

d2 o+ Heat of formation 232 kcal mol--1 d2 o+ d2 o 12.637 ±0.005 PI 232* 2013

d2 o+ d2 o 12.69 PE 233 1130

D,0+ d2 o 14.28 PE 1130

d2 o+ d2 o 18.07 PE 1130

h3 o+

h3 o+ c2 h5 oh c2 h3 12.01 ± 0.1 NS 156 339

H30+ n-C3 H7 OH c3 h3 + h2 12.66 ± 0.1 NS 155 339

H3 0+ t5o-C3 H7 OH c,h2 + ch3 13.44±0.1 NS 157 339

h3 o+ sec-C4 H3 OH c2 h2 + c,h5 13.36±0.1 NS 158 339

h3 o+ (C2 H02 0 c2 h2 + c2 h5 13. 18 ±0.1 NS 164 339

h3 o+ n-C3 H7 CH(OH)CH3 n-C3 H-+ C2 H2 13.36 ±0.1 NS 156 339

h3 o+ t5o-C3 H7 CH(OH)CH3 iso-C3 H7 + C.H2 13.18 ±0.1 NS 156 339

h3 o+ HCOOQHs c2 h,+hco 13. 10 ± 0.1 NS 163 339

h3 o+ HCOOCH(CH3 >, c2 h.+co + ch3 13.75±0.1 NS 159 339

HO^ Heat of formation 271 kcal mol- 1

HO; H0> 11.53 ± 0.02 SL 271* 36, 31

H0+ H2 02 H 15.36 ±0.05 SL 270* 36, 37

HO.; h2 o2 H 15.41 ±0.1 SL 271* 31

113
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) h2 oi Heat of formation 223 kcal mol -1

HA).; H2 02 11.26 ± 0.05 SL 227* 2066

H20+ h2 o2 10.92 ±0.05 VC 219* 37

Li2 0+ Heat of formation 118 kcal mol -1

Li2 0+ Li,0 6.8±0.2 VC 117* 318

Li,0+ Li2 0 6.9 + 0.3 LE 119* 1112

BeO+

BeO+ BeO 10.1 ±0.4 VC 264 1106

Bc2 0+

Be2 0+ Be2 0 10.5±0.5 VC 224 1106

Be2 Oj

Be2 02 Be2 02 11.1 ± 0.4 VC 154 1106

Be,Oj

Be.iO+ Be:i 02 12.5 ±1.0 VC 1106

Be;} 0^

Be.iOg BeijO;) 10.7 ± 0.4 VC -13 1106

BO^

B0+ (CH:i O):! B CH: ,0 + 2CH:i 17.5±0.3 EVD 123 115

BOJ

B0+ (CH.iO):(B 3CH.i 13.2 ± 0.3 EVD -10 115

BOJ (CH:! 0):(B 3CH;i 12.7 ±1.0 SL -22 364

CO+ (X 2S

+

) Heat of formation 297 kcal mol-1

CO+(A Ui) 355 kcal mol-1

CO+ (B 2X

+

) 427 kcal mol 1

CO+(X 2S+) CO 14.013 ±0.004 S 297* 2098

CO+ (X 2 S

+

) CO 13.985 PI 296 1382

CO+(X 2 2

+

) CO 14.01 ±0.01 PI 297 416

CO+ (X 2 X

+

) CO 13.9 ± 0.2 PI 294 163

CO+(X 2 X

+

) CO 13.98 PE 296 1108

CO+ (X 2 X+) CO 14.01 PE 297 1130

CO+ (X 2 X

+

) CO 14.11 ±0.03 RPD 299 1012

CO+(X 2 X

+

) CO 14.15±0.02 CS 300 2023

CO+(X 2 X

+

) CO 14.2 ±0.1 FDP 301 1051, 1172

CO+ (X 2 X

+

) CO 14.01 ±0.08 LE 297 3

CO+(X 2X

+

) CO 14.06 ±0.08 LE 298 1029

co+ CO 15.5 ± 0.2 PI 163

(Autoionization)

co+ CO 15.6 ±0.1 RPD 1012

(Autoionization)

114
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal moD 1 Ref.

) co+ (A 2 n,) CO 16.537 ±0.004 S 355* 2098

co+ (A 2 n,) CO 16.6±0.3 PI 356 163

co+ (A 2 n,) CO 16.51 PE 354 1130

co+ (A 2 n( > CO 16.58 PE 356 1108

CO+(A 2 H; ) CO 16.5 ±0.1 RPD 354 1012

co CO 18.4± 0.3 PI 163

(Autoionization)

co+ CO 18.4±0.1 RPD 1012

(Autoionization)

CO+ (B 2 £

+

) CO 19.671 ±0.004 S 427* 2098

C0+ (B 2 S

+

) CO 20.1 ±0.2 PI 437 163

C0+ (B 2X

+

) CO 19.67 PE 427 1108

C0+ (B 2 X

+

) CO 19.72 PE 428 1130

C0+ (B 2X

+

) CO 19.6±0.1 RPD 426 1012

co+ CO 25.7 ±0.5 PI 163

co+ co2 0- 19.5 ±0.2 PI 331 163

co+ co> 0 20.5 ± 0.2 PI 319 163

co+ co2 O(’D) 23.3 ±1.0 PI 338 163

co+ ch2 o 2H? 18.7 ± 0.2 EVD 299 204

co+ CD,0 2D? 18.8±0.3 EVD 204

co+ ch:! oh 13.7 LE 46

co CHnCHO CO 13.9± 0.1 MSD 299 1404

CO C2 H,0 ch4 12.6 ± 0.4 EVD 296 50

(Ethylene oxide)

CO 2 CO2 CO+ (C 2 S

+

) 15.9 ±0.7 NS 2016

C0+2 co+ (A 2 no 25.0 ± 0.4 NS 932 2016

CO2 CO 41.8 ± 0.3 FDP 938 212

CO2 CO 45.9 FDP 212

COUX 2n3l2g) Heat of formation 223 kcal mol-1

coux 2n1/2g) 224 kcal mol-1

co^(A 2 n3/2M) 305 kcal mol-1

COj(B 22J) 323 kcal mol-1

COj(C 353 kcal mol-1

co+(x 2n3/29 ) co2 13.769 ±0.03 S 223* 148

co2+ (X 2 n1/29 ) co2 13.792 ±0.03 S 224* 148

co+(X 2 n9 ) co2 13.788 s 224 149

co2+ (X 2 n,) co2 13.793 s 224 148

co2+ (X 2 nff ) co2 13.78±0.01 s 224 410

co+(X 2 n9) co2 13.79 ± 0.01 PI 224 182. 416

co2+ (X 2 ng ) co2 13.6 ± 0.2 PI 220 163

co+(X 2 n9 ) co2 14.0 ± 0.3 PI 229 230

co.}<x 2 n9 ) CO, 13.68 PE 221 92. 1130

co2+ (X 2 n9) CO, 13.85±0.10 RPD 225 164. 169

co+(X 2 n(y ) CO, 13.78 ± 0.08 LE 224 3, 1029

C0+ C02 14.9 ±0.2 PI 163

(Autoionization)

115
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation Ref.

(kcal mol-1

) co+(A 2 n.3/ 2 i<

C02 17.312 S 305* 1179

co+(A 2 n1/2M ) C02 17.323 s 305* 1179

co+(A 2 n„) C02 17.0 ± 0.2 PI 298 163

co+(A 2 nu ) co2 17.23 PE 303 1130

co+(A 2 nj CO, 17.27 PE 304 92

co2+ (A 2 nu ) CO, 17.23 ± 0.28 RPD 303 164, 169

CO.+(B 2S+) CO, 18.068 S 323* 149

C02+(B%+) co2 18.074 s 323* 148

CO+(B 22+) co2 18.076 s 323* 1179

C02+ (B 22+) co2 18.084 s 323* 148

CO+(B 22+) CO, 18.01 ±0.01 s 321 409

CO+(B 2 ^) co2 18.08 ±0.01 s 323* 409, 410

CO+(B 2 2+) co2 18.08 PE 323 92, 1130

co+ co2 18.8±0.3 PI 163

C02+ (C 2 X+) CO, 19.384 s 353* 148

CO^(C 2 2+) co2 19.391 s 353* 148

CO+(C 2£+) co2 19.392 s 353* 148

CO+(C 2 £+) CO, 19.38 ±0.01 s 353* 409

CO+(C 22g+

) co2 19.39 ±0.01 s 353* 409, 410

C02+ (C 2 2+) CO, 19.38 s 353* 149

CO+(C 22+) CO, 19.29 PE 351 92, 1130

CO+(C 2 2g+

) CO, 19.25 ±0.40 RPD 350 164, 169

C02+ CO, 20.5 ±0.2 PI 379 163

C0+ CO, 21.00 ± 0.39 RPD 390 164, 169

cor2 C02+2 co2 36.4±0.3 FDP 745 212

C0+2 CO, 41.9 FDP 212

NO+ (X 1 X

+ )Heat of formation 235 kcal mol 1 NO*(« 32

+

) 349 keal mol-1

NO+

(/3 series limit) 403 kcal mol-1

no+ (a 'n> 444 keal mol -1

NO+ (X %+/2 ) NO 9.250 ±0.005 PI 235* 1032, 1253

NO*(X%+

/2 ) NO 9.248 ±0.008 D 235* 1148

NO+ (X 1 2+

/2 ) NO 9.267 ±0.005 S 235* 1217

NO+(X'2+/2 ) NO 9.266 ±0.008 s 235* 1148

N0+(X'2+

j NO 9.25 ±0.02 PI 235 416

N0+ (X‘2+

) NO 9.20 ±0.03 PI 234 157

N0+ (X'2+) NO 9.25 ±0.03 PI 235 86

N0+ (X>2+

) NO 9.2 ±0.1 PI 234 163

N0+ (X'2+) NO 9.23 PE 234 1108

N0+ (X>2 +

) NO 9.34 PE 237 1130

N0+(X>2+

) NO 9.25 PE 235 1415

N0+(X>2+

) NO 9.25 ±0.02 RPD 235 328

N0+ NO 1 1 .4 ± 0.

PI 163

(Autoionization)

N0+ NO 12.8±0.2 PI 163

(Autoionization)

NO+ (a :! 2

+

) NO 14.218 ± 0.006 S 349* 1217

NO+ (a :i 2

+

) NO 14.2 ± 0.2 PI 349 163

116
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

APorIP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

N0+ NO 15.23 PE 373 1130

N0+ NO 15.4 PE 377 1108

N0+ NO 15.5 PE 379 1415

N0+ NO 16.558 ± 0.001 S 403 * 1217

(fi Rydberg series limit)

N0+ NO 16 . 9 ± 0.4 PI 411 163

(Rydberg series limit)

N0+ NO 16.53 PE 403 1108

{fi Rydberg series limit)

N0+ NO 16.5 PE 402 1130. 1415

(/3 Rydberg series limit)

NO+(A *n) NO 18.328 ± 0.005 S 444* 1217

NO+(A i n) NO 18.8 ± 0.3 PI 455 163

NO+ (A>n) NO 18.27 PE 443 1130

NO+(A'n) NO 18.34 PE 445 1108

N0+ NO 20.7 ± 0.4 PI 499 163

N0+ n2 o N 15 . 3 ± 0.4 PI 259 163

N0+ n2 o N(2 D) 16.4 ± 0.2 PI 230 163

N0+ no2 o

- 10.83 ± 0.02 PI 233 117

N0+ no2 o

- 11.3 ± 0.4 PI 244 163

NO+ (A*n) no2 0- 20.3 ± 0.3 PI 452 163

N0+ no2 0 12.5 ± 0.1 PI 237 163

N0+ no2 0 12.48 ± 0.43 EVD 236 139

N0+ no2 0(‘D) 15.3 ± 0.4 PI 256 163

N0+ no2 OCS) 16.5 ± 0.2 PI 232 163

NO+ (a ;! X+) no2 0 17.7 ± 0.3 PI 357 163

N0+ CHsONO CH:! 0 11.07 ± 0.06 RPD 239 1139

NO+ 2 N0+2 NO 39.8 ± 0.3 FDP 939 212

N2 0+ (X 2 n3/ 2 ) Heat of formation 317 kcal mol-1

N2 0+(X 2 Hi/2 ) 318 kcal mol-1

N2 0+(2X

+

) 398 kcal mol-1

N2 0+ (C) 483 kcal mol-1

N2 o+ (X 2 n3/2 ) n2 o 12.894 S 317* 149

N2 o+ (X 2 n1/2 ) N,0 12.931 S 318* 149

N2 o+(X 2 n) n2 o 12.94 ± 0.01 s 318 410

n2 o+ n2 o 12.82 + 0.008 PI 317 1253

n2 o+ n2 o 12 90 ± 0.01 PI 317 416

n2 o+ n2 o 12.83 ± 0.07 PI 315 157

n2 o+ n2 o 12 . 8 ± 0.2 PI 315 163

n2 o+ n2 o 12.82 PE 315 92 . 1130

n2 o+ n2 o 12.75 RPD 314 2018

n2 o+ n2 o 13.09 ± 0.05 SL 321 58

n2 o+ n2 o 12.9 ± 0.1 MSD 317 1451

n2 o+ N,0 13.15 RPD 2018

n2 o n2 o 13.75 RPD 2018

n2 o+ n2 o 15 . 37 ? PE 1130

n2 o+ n2 o 15.5 RPD 2018

117
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

N.>0+

( 22

+

) N2 0 16.392 s 398* 149

N,0+

( 22

+

) n2 o 16.397 s 398* 149

N2 0+

< 22

+

) n2 o 16.39 + 0.01 s 398* 409, 410

N,0+ N,0 16.9 + 0.3 PI 409 163

N2 0+ n2 o 16.37 PE 397 92, 1130

n2 o+ n2 o 17.67 PE 92, 1130

n2 o+ n2 o 18.8 ± 0.4 PI 163

N2 0+(C) N,0 20.101 S 483* 149

N2 0+(C) n2 o 20.110 s 483* 149

N2 0+ (C) n2 o 20.10 + 0.01 s 483* 409, 410

n2 o+ n2 o 20.7 + 0.3 PI 497 163

n2 o+ n2 o 20.10 PE 483 92, 1130

NOj Heat of formation 233 kcal mol -1 NO? no2 9.78 + 0.05 PI 233* 117

NO? no2 9.80 + 0.05 PI 234* 61

NO? no2 10.2 RPD 243 2018

NO? no2 11.1 PI 264 61

NO? no2 10.97 PE 261 1130

NO? no2 11.0 RPD 262 2018

NO? no2 11.3 + 0.4 PI 269 163

NO? no2 11.27 + 0.19 NS 268 139

NO? no2 11.3 EC 269 218

NO? no2 11.62 S 276 117

NO? no2 11.7? PI 278 416

NO? no2 11.7 RPD 278 2018

NO? no2 12.5 + 0.1 PI 296 163

NO? no2 12.7 PI 301 61

NO? no2 12.82 PE 304 1130

NO? no2 12.5 RPD 296 2018

NO? no2 13.4 + 0.1 PI 317 163

NO? NO. 13.48 PE 319 1130

NO? no2 14.01? PE 331 1130

NO? no2 13.98 + 0.12 SL 330 58

NO? no2 14.37? PE 339 1130

NO? no2 15.3 + 0.4 PI 361 163

NO? NO. 16.2 ± 0.2 PI 382 163

NO? no2 16.79 PE 395 1130

NO? no2 17.8 ± 0.3 PI 418 163

NO? no2 18.87 ±0.05 S 443 1097

NO? no2 18.86 PE 443 1130

NO? no2 20.0±0.3 PI 469 163

118
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

N0+ ch3 no2 ch3 12.60 ± 0.10 RPD 240 1241

N0+ ch3 no2 ch:! 16.90 RPD 1241

N0+ c2 h5 ono2 c2 h5 o 11.40±0.12 SL 235 1004, 1013

B3H203

B:i H2 0+ B3 H303 H 14.5 ±0.5 NS -7 2175

B3H3O3

B3 H3 O+ B3H303 13.5±0.5 NS 22 2175

CHO+ Heat of formation 221 kcal mol -1

CHO+ CHO 10.03 ± 0.17 EVD 227 128

CHO+ CHO 9.83 ±0.18 EVD 223* 128

CHO+ CHO 9.9 ± 0.3 EVD 224 127

CHO+ ch2 o H 13.10±0.08 EVD 222 * 127. 204

CHO+ ch2 o H 12.89±0.10 EVD 217* 127

CHO ch2 o H 18.4 ± 0.3 LE 204

CHO CHi0H H>+ H 14.2 LE 227 46

CHO+ CH3 CH0 CH3 12.88 ± 0.10 EVD 224* 130

CHO+ CH3CH0 ch3 12.70 SL 220* 298

CHO c,h4 o ch3 12.2 ± 0.1 EVD 236 50

(Ethylene oxide)

CHO+ ch2 =chcho C>H;{ 13.99 ±0.10 EVD 235 130

CHO c3 h6 o c2 h5 11 . 8 ± 0.2 EVD 225 50

(Propylene oxide)

CHO+ (CH2 )30 c2 h5 12.6 ± 0.2 EVD 242 52

(Trimethylene) oxide)

CHO+ c4 h«o 12.9 ± 0.6 EVD 153

(3,4-Epoxy-l -butene)

CHO ChH5 CHO CeHs 13.67 ± 0.13 EVD 233 130

(Benzaldehyde)

CHO+ c6 h5 cho c6 h5 13.71 ±0.14 EVD 234 127

(Benzaldehyde)

CHO+ HCOOH OH 13.75 ± 0.08 EVD 217* 127

CHO+ CHOCHO CHO 12.72 ±0.12 EVD 223* 128

CHO CHOCHO CHO 13.75 ±0.08 EVD 128

CHO CH3COCHO CH,CO 12.48 ±0.05 EVD 226 128

CHO+ c4 h«o2 14.4 ± 0.2 EVD 153

(l,2-Epoxy-3-methoxypropane)

CHO+ (CHaO^B 19.1 ±0.3 EVD 115

CHO+ C3 H5 OCI C2 H4 C1 12.0±0.5 EVD 231 153

(Epichlorohydrin)

CHO+ CaHsOBr C.lEBr 11.8 ± 0.2 EVD 226 153

(Epibromohydrin)

CDO+ CDO cd2 o D 13.10 ± 0.12 EVD 127, 204

CDO+ cd2 o D 18.8±0.3 LE 204

ch2 o+ Heat of formation 223 kcal mol

ch2 o+ CH,0 10.90 ±0.03 PI 223* 1166

CH2 0+ ch2 o 10.87 ±0.1 PI 223* 182, 416

ch2 o+ ch2 o 10.99 ±0.03 RPD 225 286

ch2 o CH,0 11.81 ±0.03 RPD 286

ch2 o ch2 o 13.77 ±0.04 RPD 286

119
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

ch2 o+ ch2 o 10.87 ±0.07 EVD 223 127, 204

CH,0+ CH,0 12.2 ± 0.2 LE 204

ch,o+ ch2 o 13.6±0.2 LE 204

CH-O ch3 oh h2 12.7 LE 245 46

ch2 o+ c2 h5 oh CH, 12.7 LE 255 46

ch2 o+ c3 h«o C2 Hj 11.6±0.3 EVD 233 50

(Propylene oxide)

ch2 o+ c,h8 o2 0,114 + CH2 0 10.9 ± 0.2 EVD 224 153

( 1 ,2-Epoxy-3-methoxypropane)

ch2 o+ c2 h5 ono2 11.76±0.65 VC 1013

cd2 o

cd2 o cd2 o 10.88 ±0.08 EVD 127. 204

cd2 o+ cd2 o 13.3±0.2 LE 204

ch3 o+

ch3 o+ ch3 oh H 12.32 RPD 184 97

CH;i 0+ ch3 oh H 12.1 ± 0.1 VC 179 1100

CH.jO+ ch3 oh H 12.15 LE 180 46

CH:i 0+ c2 h5 oh ch3 12.34 RPD 195 97

ch3 o+ C2 HsOH ch3 11.3 ± 0.

VC 171 1100

CH.iO+ c2 h5 oh CH, 11.6 LE 178 46

CIL0+ ch3 och3 CH-? 10.0 RPD 2018

ch3 o+ ch3 och3 ch3 11.0 RPD 176 2018

ch3 o+ ch3 och3 CH-? 11.6 RPD 2018

ch3 o+ ch3 och3 ch3 ? 12.3 RPD 2018

ch3 o+ ch3 och3 ch3 12.7 RPD 2018

ch3 o+ ch3 och3 CHi 12.1 ± 0.1 VC 202 1100

ch3 o+ c3 h«o C2 H2 + H 13.4±0.2 EVD 181 50

(Propylene oxide)

ch3 o+ (CH-zhO c2 h2 + h 13.3 ± 0.2 EVD 176 52

(Trimethylene oxide)

ch3 o+ n- C3 H7 OH c2 h5 11.47 PI 178 11 ch3 o+ n-C3 H7 OH c2 ie 12.13 RPD 193 97

ch3 o+ n-C3 H7 OH c2 h3 11.1 ± 0.1 VC 169 1100

ch3 o+ «-C3 H7 OH c2 h5 11.65 LE 182 46

ch3 o+ 150-C3 H7 0H c2 h5 12.5 LE 201 46

ch3 o+ C4 H*;0 13.3±0.5 EVD 153

(3.4-Epoxy-l -butene)

ch3 o+ n-C4 H9 OH n-C3 H7 11.46 RPD 176 97

ch3 o+ n-C4 H9 OH n-C3 H7 1 1 .4 ± 0.

VC 174 1100

ch3 o+ C2 H,OC2 H5 0,10 + ch3 12.35 ±0.1 EVD 179 2196

ch3 o+ hcooch3 CHO 12.35 ±0.1 SL 205 210

ch3 o+ hcooch3 CHO 12.1 ± 0.1 VC 199 1100

ch3 o+ HCOOC.H5 CH3 C0 12.02 ± 0.1 SL 193 210

ch3 o+ hcooc2 h5 ch3 co 12.44 ±0.1 VC 202 1059

ch3 o+ CH.COOCHi ch3 co 12.7 ±0.1 VC 198 1100

ch3 o+ HCOOCH(CH3 )2 13.45 ±0.1 SL 210

ch3 o+ C4 Hs02 13.9±0.4 EVD 153

( 1 ,2-Epoxy-3-methoxypropane)

ch3 o+ (CHaObB (CHijObB 12.7 ±0.2 EVD 115

ch3 o+ CH.sONO NO 11.0 ± 0.1 VC 216 1100

CILO+ CH2 0HCH2 C1 CH2 C1 11.51 ±0.1 SL 72

ch3 o c3 h5 oci c2 h2 + ci 13.4±0.2 EVD 199 153

(Epichlorohydrin)

ch3 o+ C3 H5 OBr C2 H2 + Br 12.5 ± 0.2 EVD 192 153

(Epibromohydrin)

120
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal moL

1 Ref.

l ) ch2 do+

CH2 DO+ DCOOCH(CHf >2 13.53±0.1 SL 210

ch3 oh+ Heat of formation 202 kcal mol 1 ch4 o+ ch3 oh 10.85 + 0.02 PI 202 * 182, 416 aw CH30H 10.83 PE 202 * 1130 aw CH30H 12.33 PE 1130 aw CH30H 14.64 PE 1130

aw CH30H 17.23 PE 1130 aw CH30H 10.95 ± 0.10 RPD 205 164, 1072 aw CH(OH 12.82 ±0.35 RPD 164, 1072

aw CH30H 14.50 + 0.50 RPD 164, 1072 aw CH30H 16.06 ± 0.15 RPD 164, 1072

aw CH30H 18.85 + 0.6 RPD 164, 1072

aw CH30H 11.15 RPD 2018

aw CH30H 12.1 RPD 2018

aw CH30H 13.2 RPD 2018

aw C.H30H 13.7 RPD 2018

ch4 o+ CH30H 10.8 RPD 201 28

aw CliiOH 11.7 RPD 28 aw CH30H 12.6 RPD 28

aw CH30H 14.2 RPD 28 aw CH30H 10.8 RPD 201 2060

ch4 o+ CliiOH 11.8 RPD 2060

ch4 o+ CH3 OH 12.5 RPD 2060

ch4 o+ CH3 OH 14.5 RPD 2060

CIW CH,OH 10.97 + 0.05 CS 205 383, 384

CIW CH3 OH 10.9 LE 203 46

ch4 o+ CH3 OH 10.79 TC 201 136

ch4 o+ HCOOCHj CO 1 1.53 ±0.1 SL 209 210

C2 HO+

c2 ho+ c4 h8 o2 13.0± 0.3 EVD 153

(l,2-Epoxy-3-methoxypropane)

c2 h2 o+

c2 h2 o+ c2 h4 o 2H 14.0± 0.3 EVD 206 50

(Ethylene oxide) c2 h2 o+ CH3 COCH3 CH4 10.37 PI 205 1099 c2 h2 o+ CH3 COCH3 ch4 10.2 MSD 201 1404 c2 h2 o+ c3 h6 o CH3 + H 12.7 ± 0.2 EVD 186 50

(Propylene oxide) c2 h2 o+ c4 h6 o c2 h4 9.8± 0.4 EVD 224 153

(3,4-Epoxy-l -butene) c2 h2 o+ n-C4 H9 OH 11.23 RPD 97 c2 h2 o+ c4 h8 o2 CH3 + CH3 O 12.3±0.3 EVD 208 153

(l,2-Epoxy-3-methoxypropane) c2 h2 o+ C3 H50C1 CH2 C1 + H? 12.1 ± 0.1 EVD 153

(Epichlorohydrin)

121
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) ch3 co+ Heat of formation 152 kcal mol 1 QH3 O ch3 co 8.05 ±0.17 EVD 181 128

c2 h3 o+ CHaCHO H 11.67 ± 0.07 EVD 177 128, 130

C2 HaO+ CHaCHO H 11.45 SL 172 298

c2 h3 o+ CH3 CHO H 10.5 ± 0.2 MSD 150* 1404

C2 HaO+ C2 H40 H 12.1 ± 0.2 EVD 214 50

(Ethylene oxide)

C2 HaO+ C2 H5 OH h2 + h 14.5 LE 226 46

c2 h3 o+ CHgCOCHa CHa 10.33 PI 153* 95

C2 H30+ CHaCOCHa CHa 11.16 + 0.09 EVD 172 128

c2 h3 o+ CHaCOCHa CHa 11.30 SL 176 298

c2 h3 o+ CHaCOCHa CHa 10.62 + 0.04 VC 160 2174

c2 h3 o+ CHaCOCHa CHa 10.2 + 0.1 MSD 150* 1404

c2 h3 o+ CaHjO CHa 10.9± 0.2 EVD 196 50

(Propylene oxide)

C2 HaO+ CHjCOC^CH c2 h 11.85 SL 172 298

C2 HaO+ CHaCOCH=CH2 GHa 12.40 SL 194 298

c2 h3 o+ c4 h6 o C2 Ha 10.5 ± 0.2 EVD 187 153

(3,4-Epoxy-l -butene)

c2 h3 o+ CHaCOCaHs c2 h5 10.3 PI 154* 95

c2 h3 o+ CHaCOCaHs c2 h5 11.40 SL 180 298

c2 h3 o+ (CH2 )4 0 CaHq+H 12.8 + 0.2 EVD 188 52

(Tetrahydrofuran)

c2 h3 o+ C3 H7 COCHa n-C3 H7 ? 11.55 SL 183 298

C2 HaO+ t- 5 o-C3 H7 COCHa iso -C3 H7 10.4 PI 160 95

C2 HaO+ n-C4 HqCOCHa n-C4 H9 10.8 PI 164 95

C2 HaO+ C6 H5 COCHa c6 h5 13.7 SL 221 298

(Acetophenone)

C2 HaO+ c6 h5 coch C6 H5 11.40 + 0.28 LE 168 2174

(Acetophenone)

c2 h3 o+ CHaCOOH OH 11.85 SL 160 298

c2 h3 o+ CHaCOOH OH 12.68 LE 179 171

C2 HjO+ CHsCOCHO CHO 10.65± 0.12 EVD 184 128

GHaO+ ch3 cococh3 CHaCO 9.88 PI 154* 1099

c2 h3 o+ CHaCOCOCHa CHaCO 10.55 + 0.13 EVD 170 128

c2 r3 o+ CHaCOCOCHa CHaCO 10.50 SL 169 298

C2 HaO+ CHaCOCOCHa CHa + CO 11.51 ± 0.15 EVD 181 128

c2 h3 o+ CH3 COOC2 H5 C2 H5 O 12.05 SL 180 298

c2 h3 o+ CH3 COOC2 H5 c2 h5 o 12.23 ±0.1 VC 184 1059

c2 h3 o+ c4 h8 o2 CH2 + CHaO 13.1 ± 0.2 EVD 166 153

(l,2-Epoxy-3-methoxypropane)

c2 h3 o+ CH3 COCHN2 chn2 10.46 ±0.05 VC 2174

c2 h3 o+ CHaCOF F 12.3 SL 160 298

c2 h3 o+ CHaCOCFa CFa 11.45 SL 160 298

c2 h,3 o+ CH3 C0C1 Cl 11.20 SL 171 298

c2 r3 o+ ch3 coch2 ci CH2 C1 10.29± 0.04 VC 152 2174

c2 h3 o+ CHaCOBr Br 10.60 SL 171 298

c2 d3 o+ CD3 COOH

C3D3O

OH 12.97 LE 171

122
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

CH3 CHO+ Heat of formation 196 kcal mol 1 cyclo-C2 H4 0+ 231 kcal mol 1 c2 h4 o CH3 CHO 10.21 ± 0.01 PI 196* 182, 416

c2 h4 o+ CH3 CHG 10.20 ±0.03 PI 195* 1166

GILO* CH3 CHO 10.25 ±0.03 PI 197* 86

c2 h4 o+ CH3 CHO 10.21 RPD 196 286

c2 h4 o+ CH3 CHO 12.37 RPD 286

c2 h4 o+ CH3 CHO 14.48 RPD 286

C2 H40+ CH3 CHO 10.50± 0.05 EVD 202 127

GIRO* CH3 CHO 10.25 ±0.08 EVD 197 130 c2 h4 o+ CH3 CHO 10.25±0.01 CS 197 2026

c2 h4 o+ CH3 CHO 10.2 ± 0.1 MSD 195 1404

GILO* QEUO 10.565 S 231* 101

(Ethylene oxide)

c2 h4 o+ c2 h4 o 10.565 ±0.01 PI 231* 101, 416

(Ethylene oxide)

GIRO* GIRO 10.70±0.02 PI 101

(Ethylene oxide)

GIRO* G-FLiO 10.49 PE 229 1130

(Ethylene oxide)

GIRO* c2 h4 o 11.48 PE 1130

(Ethylene oxide)

c2 h4 o+ c2 h4 o 13.48 PE 1130

(Ethylene oxide)

GIRO+ C2 H40 16.16 PE 1130

(Ethylene oxide)

C2 H40+ C2 H40 20.16? PE 1130

(Ethylene oxide)

GILO+ GILO 10.65±0.1 EVD 233 50

(Ethylene oxide)

c2 h5 o+

c2 h5 o+ C2 H5 OH H 11.12 RPD 148 97

c2 h5 o+ c2 h5 oh H 10. 9± 0.1 VC 143 1100

GILO+ c2 h5 oh H 10.95 LE 144 46

c2 h5 o+ CH30CH3 H 11.42 ± 0.01 RPD 167 1139 c2 h5 o+ CH30CH3 H 11 . 0 ± 0.1 VC 158 1100 c2 h5 o+ n-CsELOH ch3 11.95 RPD 180 97 c2 h5 o+ n-C3 H7 OH CH3 11.1 LE 161 46

c2 h5 o+ J50-C3 H7 OH ch3 11.39 RPD 164 97 c2 h5 o+ 150-C3 H7 OH ch3 10.9 LE 153 46 c2h5 o+ CH3 OGH5 ch3 11.25±0.07 RPD 174 1139

GILO+ C2 H5 OC2 H5 C2 H5 13.23 ±0.04 EVD 220 2196

GHsO+ C2 Hs OC2 H5 c2 h5 12.3±0.1 VC 198 1100

c2 h5 o+ HCOOC2 H.5 HCO 11.55 ±0.1 SL 182 210 c2 h5 o+ hcooc2 h5 HCO 1 1 .4 ± 0.1 VC 178 1100 c2 h5 o+ dcooc2 h5 DCO 1 1 .55 ±0.1 SL 210

C2 HsO+ (CHaO^CIL CH3 O 11.41 ±0.03 RPD 178 1139

gh5 o+ HCOOCHlCHah CH3 CO 11.53 ±0.1 SL 173 210 c2 h5 o+ CH3 COOGH5 CH3 CO 10. 8 ± 0.1 VC 147 1100 c2 h5 o+ c4 h8 o2 12.1 ±0.15 EVD 153

(l,2-Epoxy-3-methoxypropane)

c2 h4 do+ GILDO+ DCOOGH5 HCO? 12.33±0.1 SL 210

123
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-1

) C2 H50H Heat of formation 185 kcal mol 1 ch3 och^ 186 kcal mol-1

c2 h6 o+ c2 h5 oh 10.48 ±0.05 PI 185* 182

C2 H60+ c2 h5 oh 10.50± 0.05 PI 186* 416

C2 HeO+ C2 HsOH 10.63 PE 189 1130

c2 h6 o+ c2 h5 oh 11.81 PE 1130

C2 HeO+ C2 HsOH 12.80 PE 1130

c2 h6 o+ QHsOH 15.69 PE 1130

c2 h6 o+ C2 HsOH 17.38 PE 1130

C2 HeO+ c2 h5 oh 20.12 PE 1130

c2 h6 o+ CzHsOH 10.72 RPD 191 97

c2 h6 o+ C2 H5 OH 10.4 RPD 184 2060

c2 h6 o+ c2 h5 oh 11.9 RPD 2060

CzHaO* c2 h5 oh 12.7 RPD 2060

c2 h6 o+ QH50H 13.8 RPD 2060

C2 H60+ C2 H5 OH 10.5 RPD 186 28

c2 h6 o+ C2 HsOH 11.7 RPD 28

c2 h6 o+ c2 h5 oh 12.7 RPD 28

c2 h6 o+ c2 h5 oh 13.6 RPD 28

c2 h6 o+ CzHsOH 11.0 RPD 2018

C2 H6 0+ CzHsOH 11.3 RPD 2018

c2 h6 o+ C2 H5 OH 11.7 RPD 2018

C2 H60+ c2 h5 oh 12.4 RPD 2018

c2 h6 o+ c2 h5 oh 13.3 RPD 2018

c2 h6 o+ CzHsOH 13.6 RPD 2018

C2 H60+ C2 H5 OH 10.65 ±0.05 CS 189 383, 384

c2 h6 o+ c2 h5 oh 10.7 LE 191 46

c2 h6 o+ CHaOCHz 9.96 ±0.05 S 186* 2170

c2 h6 o+ ch3 och3 10.00±0.02 PI 187* 182, 416

c2 h6 o+ CILOCIi, 10.5 RPD 2018

c2 h6 o+ CH3 OCH3 11.0 RPD 2018

c2 h6 o+ CHsOCHa 11.8 RPD 2018

c2 h6 o+ CHbOCHb 13.0 RPD 2018

c2 h6 o+ CHsOCH, 14.0 RPD 2018

c2 h6 o+ CHsOCH, 10.22 TC 192 136

c3 ho+

c3 ho+ CILCOC^CH CH, 11.0 SL 231 298

c3 h3 o+

C3 H30+ CH3COCH=CH2 CHa 10.85 SL 190 298

c2 h3 cho+ Heat of formation 210 kcal mol 1

c3 h4 o+ ch2=chcho 10.10±0.01 PI 210* 182, 416

C3 H40+ ch2=chcho 10. 14 ±0.06 EVD 211 130

C3 H40+ ch2=chcho 10.25 ±0.05 CS 213 384

C3 H40+ ch3 cochn2 n2 9.86 ±0.03 VC 2174

124
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C2 H5 CO+ Heat of formation 143 kcal mol 1

c3 h5 o+ c3 h6 o H 11.5 + 0.3 EVD 191 50

(Propylene oxide)

C3 H5 0+ CH3 COC2 H5 CHa 10.16 PI 143* 95

C3 H5 0

ch3 coc2 h5 ch3 10.18 PI 143* 1099

GAO* CHaCOGHa ch3 10.45 SL 150 298

c3 h5 o+ c4 h«o2 ch3 o 11.2 ± 0.2 EVD 216 153

(l,2-Epoxy-3-methoxypropane)

c3 h5 o+ c2 h5 cocoh3 COCH3 9.67 PI 144* 1099

C,U5 0+ c3 h5 oci Cl 11.4± 0.3 EVD 207 153

(Epichlorohydrin)

c3 h5 o+ C3 H5 OBr Br 10.8 + 0.1 EVD 207 153

(Epibromohydrin)

C2 H5 CHO+ Heat of formation 181 kcal mol 1 CH3 COCH£ 171 kcal mol 1 CH2=CHCH2 OH+ 191 kcal mol 1 CH2=CHOCH£ 178 kcal mol 1 C3 H6 0+ (Propylene oxide) 214 kcal mol-1

C3 H6 0+ (Trimethylene oxide) 199 kcal mol-1

c3 h«o+ C2 H5 CHO 9.98 + 0.01 PI 181* 182

c3 h6 o+ c2 h5 cho 10.14± 0.10 EVD 185 130

c3 h«o+ CILCOCH.i 9.69±0.01 PI 172* 182.416

c3 h«cp CH3 COCH3 9.68 + 0.02 PI 171* 95

c3 h6 o+ ch3 coch3 11.6 PI 95

c3 h«o+ ch3 coch3 9.71 ±0.03 PI 172* 1166

c3 h«o+ CHaCOCHi 9.65 + 0.1 PI 171* 86

c3 h«o+ CH3 COCHi 9.67 PE 171 1130

c3 h«o+ CHaCOCHa 12.16 PE 1130

C3 H«0+ CHaCOCHa 14.15? PE 1130

c3 h«o+ CHaCOCHa 15.55 PE 1130

c3 h6 o+ CHaCOCHa 17.92? PE 1130

c3 h6 o+ CHaCOCHa 19.88 PE 1130

C3 Hh O+ CHaCOCHa 9.80 + 0.05 VC 174 2174

c3 h«o+ CHaCOCHa 9.84 ±0.03 cs 175 2026

c3 h«o CHaCOCHa 9.89 ±0.05 cs 176 384

c3 h«o+ CHaCOCHa 9.7 ±0.1 MSD 172 1404

c3 h«o+ CHaCOCHa 9.73 LE 173 1254, 1256

C3 HhO+ CH2 =CHCH2 OH 9.67 ±0.05 PI 191* 182

C3 Hh O+ CH2 =CHOCHa 8.93 ±0.02 PI 178* 182

C3 HhO+ CH2 =CHOCHa 9.97 TC 202 136

c3 h6 o+ CaH«0 10.22 ±0.02 PI 214* 182

(Propylene oxide)

c3 hk o+ CaH«0 9.80±0.1 EVD 204 50

(Propylene oxide)

C3 HeO+ (CH2 )aO 9.667 ±0.005 S 199* 2169

(Trimethylene oxide)

c3 h«o+ (CHahO 9.85 ±0.15 EVD 203 52

(Trimethylene oxide)

c3 h«o+ (CH2 hO 9.7 EC 200 218

(Trimethyle ne oxide)

323-656 0-69—9

125
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C3 H(i O+ n-C3 H7 COCH3 C2 H4 10.07 PI 158 95

c3 h«o+ n-C4 H9 COCH3 c3 h« 10.00 PI 159 95

c3 h«o+ iso-C4 H9 COCH3 c3 h6 10.1 PI 160 95

c3 h6 o+ C4H8 02 ch2 o 10.2 ± 0.2 EVD 220 153

(l,2-Epoxy-3- methoxypropane)

c3 h7o+

c3 h7 o+ n-C3 H7 OH H 11.00 PI 140 11 c3 h7 o+ n-C3 H7 OH H 10.69 RPD 133 97

c3 h7 o+ n-C3 H7 OH H 11.2 LE 144 46

c3 h7 c+ iso-C3 H7 OH H 11.85 RPD 156 97

c3 h7 o+ i5o-C3 H7 OH H 11.3 LE 143 46

c3 h7 o+ c2 h5 oc2 h5 ch3 10.80 ±0.08 EVD 156 2196

c3 h7 o+ (CH3 0>2 CHCH3 ch3 o 10.63 ±0.04 RPD 153 1139

rt-C3 H7 OH+ Heat of formation 172 kcal mol-1

iso-C3 H7 OH+ 169 kcal mol 1 c3 h8 o+ n-C3 H7 OH 10.20 PI 173* 182

c3 h8 o+ n-C3 H7 OH 10.1 PI 171* 11 C3 HhO+ n-C3 H7 OH 10.1 PI 171 86

C3 HhO+ n-C3 H7 OH 10.37 RPD 177 97

c3 h8 o+ n-C3 H7 OH 10.5 RPD 2018

c3 h8 o+ n-C3 H7 OH 11.1 RPD 2018

c3 h8 o+ n-C3 H7 OH 11.6 RPD 2018

c3 h8 o+ n-C3 H7 OH 12.2 RPD 2018

c3 h8 o+ n-C3 H7 OH 13.0 RPD 2018

c3 h8 o+ n-C3 H7 OH 13.6 RPD 2018

c3 h8 o+ n-C3 H7 OH 10.42 ±0.10 CS 178 384

C3 HsO+ n-C3 H7 OH 10.9 LE 189 46

c3 h8 o+ t5o-C3 H7 OH 10.15±0.05 PI 169* 416

c3 h8 o+ 150-C3 H7 0H 10.16 PI 169* 182

c3 h8 o+ t5o-C3 H7 OH 10.41 RPD 175 97

c3 h8 o+ iso-C3 H7 OH 10.27 ± 0.10 CS 171 384

C4 H4 0+ (Furan) Heat of formation 197 kcal mol 1

C4 H4 O C4 H4 O 8.89 s 197* 161

(Furan)

C4 H4 CP C4 H4 O 9.95 s 161

(Furan)

C4 H40+ C4 H4 O 8.89 ±0.01 PI 197* 161. (Furan) 182,416

C4 H4 0+ C4 H4 O 9.04 ±0.09 SL 200 411

(Furan)

C4 H4 O C4 H4 O 9.00±0.10 CS 199 383. 381

(Furan)

C4 H4 O C4 H40 8.93 TC 198 136

(Furan)

ch3ch=chcho+ Heat of formation 194 kcal mol- 1

C41L0+ ch3 ch=chcho 9.73±0.01 PI 194* 182, 416

C4H(i 0+ ch3 ch=chcho 9.81 ±0.05 CS 196 384

C4H; 0+ C4H«o 9.7 ± 0.3 EVD 234 153

(3,4-Epoxy-l -butene)

126
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Ion Reactant

Other

products

APorIP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c4 h7 o+

c4 h7 o+ n-C3 H7 COCH3 ch3 10.03 PI 136* 95

c4 h7 o+ iso-C3 H7 COCH3 ch3 9.94 PI 133* 95

c4 h7 o+ rc-C4 H9 COCH3 c2 h5 10.03 PI 140* 95

c4 h7 o+ (CH2 )4 0 H 11.1+0.2 EVD 161 52

(Tetrahydrofuran)

«-c3 h7 cho+ Heat of formation 174 kcal mol-1

iso-C3 H7 CHO+ 169 kcal mol-1

C2 H5 COCH^ 161 kcal mol-1

cyclo-C4 H8 0+ 174 kcal mol-1

C4 HsO+ n-C3 H-CHO 9.86 + 0.02 PI 174* 182

C4 HsO+ i5o-C3 H7 CHO 9.74 + 0.03 PI 169* 182

C4 HhO+ c2 h5 coch3 9.53 ±0.01 PI 162* 182

c4 h*o+ c2 h5 coch3 9.48 + 0.02 PI 160* 95

c4 h8 o+ c,h5 coch3 11.3 PI 95

C4 HkO+ C2 H5 COCH3 9.54 ±0.02 PI 162* 416 c4 h8 o+ C2H5COCH3 9.55 ±0.03 PI 162* 1166

c4 h*o+ C2 H5 COCH3 9.45 ±0.1 PI 160* 86

c4 h«o+ c2 h5 coch3 9.58 ±0.09 SL 163 411 c4 h8 o+ (CH2 )4 0 9.42 ±0.01 S 174* 2169

(Tetrahydrofuran) c4 h8 o+ (CH2 )4 0 9.54 PI 177 182

(Tetrahydrofuran)

C4 HhO+ (CH2 )4 0 9.45±0.15 EVD 175 52

(Tetrahydrofuran)

C4 HhO+ (CH2 )4 0 9.3 EC 171 218

(Tetrahydrofuran)

c4 h«o+ (CH2 )4 0 9.53 TC 177 1077

(Tetrahydrofuran)

c4h9o+

c4 h9 o+ (CH3 0)2 C(CH3 )2 ch3 o 10.28 ±0.05 RPD 144 1139

fi-C4 H9OH+ Heat of formation 165 keal mol-1

c2 h5 oc2 h+ 161 kcal mol-1

c4 hI0 o+ u-C4 H9 OH 10.04 PI 165* 182

c4 h10 o+ n-C4 H9 OH 10.56 RPD 177 97

C4 HioO+ C2 H5 OC2 H5 9.53 ±0.02 PI 160* 416, 182

C4 H10 O c2 h5 oc2 h5 9.65 ±0.03 PI 162* 1166

C4 HioO+ c2 h5 oc2 h, 9.61 PE 161 1130

C4 H10 O+ c2 h5 oc2 h3 11.08 PE 1130 c4 h10 o+ c2 h5 oc2 h5 11.92? PE 1130

C4 Hi 0 O+ c2 h5 oc2 h5 16.23 PE 1130 c4 h10 o+ C2 H5 OC2 H5 19.67? PE 1130 c4 h10 o+ C.ITOQH-, 9.55 ±0.02 EVD 160 2196

c5 h6 o

c5 hb o+ c5 h«o 8.39± 0.01 PI 177* 182

(2-Methylfuran)

c5 h6 o+ C5 HhO 8.31 ±0.09 SL 176 411

(2-Methylfuran) QIW c3 h(; o 8.58 TC 182 136

(2-Methylfuran)

127
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c3 h8 o+

C5 HhO+ C5 HhO 9.26 ± 0.01 PI 167* 182

(Cyclopentanone)

c5 h*o+ c5 h«o 8.34±0.01 PI 164* 182

(Dihydropyran)

c5 h«o+ c5 h8 o 9.45 CTS 189 2031

(Dihydropyran)

c3 h9o+

c5 h9 o+ n-C4 H9 COCH3 ch3 9.66 PI 123* 95

c5 h9 o+ i5o-C4 H9 COCH3 ch3 9.80 PI 125* 95

n-C4 H9CHO+ Heat of formation 168 kcal mol-1

iso-C4H9 CHO+ 164 kcal mol-1

n-C3 H7 COCH£ 154 kcal mol-1

iso-C3 H7 COCH£ 151 kcal mol-1

(C2 H3 )2 CO+ 153 kcal mol-1

cjcfo-C5 Hi0O+ 161 kcal mol-1

c5 h10 o+ n-C4 H9 CHO 9.82 ±0.05 PI 168* 182

c5 h10 o+ iso- C4 Hh CHO 9.71 ± 0.05 PI 164* 182

C5 Hh,0+ n-C:i H-COCH.s 9.37 ± 0.02 PI 154* 95

C5 H,oO+ n-C3 H7 COCH3 10.7 PI 95

C5 H,oO+ n-C.sH-COCHa 9.39 ±0.02 PI 155* 182

C5 H10 O C.HyCOCH, 9.47 ±0.03 PI 157 1166

c5 h10 o «o-C3 H7 COCH3 9.30± 0.02 PI 151* 95

C3 H,oO+ iso- C3 H7 COCH3 10.7 PI 95

c5 h10 o+ iso-C3 H7 COCH3 9.32 ±0.02 PI 152* 182

c5 h10 o+ C2 H5 COC2 H-, 9.32 ±0.01 PI 153* 182

c5 h10 o+ (CHAO 9.25 ±0.01 S 161* 2169

(Tetrahydropyran)

c5 h10 o+ (CH2 )5 0 9.26 ±0.03 PI 162 182

(Tetrahydropyran) c5 h10 o+ (CH2 )5 0 9.7 EC 172 218

(Tetrahydropyran)

c5 h10 o+ (CHAO 9.25 TC 161 1077

(Tetrahydropyran)

c6 h5o+

c«h5 o+ c«h5 o 8.84 SL (a) 1079

(Phenoxy radical)

C6 H.-,0 c6 h5 och3 ch3 11.92 ±0.1 SL 226* 1079

(Anisole)

c«h5 o+ c6 h.5 oc=ch c2 h 9.5±0.1 VC 13

(Phenoxyacetylene)

128
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

C6 Hfi O+ (Phenol) Heat of formation 173 kcal mol 1 GTLO+ CbHsOH 8.50 ±0.01 PI 173* 182, 416

c«H«o+ CbH,OH 8.52 ±0.02 PI 173* 1166

(Phenol)

ChH«0+ c«h,oh 9.16 SL H

1 CO CO 1066

(Phenol)

CeHfiCP ck h5 oh 9.03 TC 185 136

(Phenol)

c6 h«o+ (C6 Hr) >2 0 C6 IL 13.88±0.15 SL (b) 1237

(Phenyl ether)

c6 h8o+

ChH8 o+ CbHsO 8.01 ±0.09 SL 161* 411

(2,3-Dimethylfuran)

(CH3 )2 C=CHCOCH+ Heat of formation 168 kcal mol -1

cyclo-C6 HioO+ 157 kcal mol -1

C«H10 O+ (CH3 ) 2 C=CHCOCH3 9.08 ±0.03 PI 168* 182

CeHioCP (CH3 >2 C=CHCOCH3 8.89 ±0.05 cs 163 384

CeHioO+ CbH.oO 9.14±0.01 PI 157* 182

(Cyclohexanone)

CsHioO+ c6 h10 o 9.91 ±0.05 cs 174 431

(Cyclohexanone)

CeHioO+ c6 h10 o 9.83± 0.05 LE 173 431

(Cyclohexanone)

H-C4 H9COCHJ Heat of formation 149 kcal mol-1

iso-C4 H9COCHj 147 kcal mol-1

tert-C4 H9COCH£ 140 kcal mol-1

c«h12 o+ n-C4 H9 COCH3 9.37 ±0.02 PI 150* 95

c«h 12 o+ n-C4 H9 COCH3 10.6 PI 95

c«h12 o+ n-C4 H9 COCH3 9.34 ±0.03 PI 149* 182

c«h12 o n-C4 H9 COCH3 9.77 LE 159 1256

c«h 12 o+ n-C4 H9 COCH3 9.70 TC 157 1256

c6 h12 o+ secC

4 H9 COCH3 9.69 LE 156 1254

c«h12 o+ sec- C4 Hh COCH3 9.657 TC 155 1254

c„h12 o+ iso-C4 H9 COCH3 9.30 ±0.02 PI 147* 95

ChH12 0+ iso-C4 H9 COCH3 10.6 PI 95 c6 h12 o+ iso-C4 H9 COCH3 9.30 ±0.03 PI 147* 182

c«h12 o+ iso-C4 H9 COCH3 9.33 LE 147 1256

c6 h12 o+ 7so-C4 H9 COCH3 9.69 TC 156 1256

c«h12 o+ fert-C4 H9 COCH3 9.17 ± 0.03 PI 140* 182

ChH12 0+ tert-C4 H9 COCH3 9.51 LE 148 1254 c6 h, 2 o+ fert-C4 H9 COCH3 9.637 TC 151 1254

c6 h7 d5 o+

C„H7 D:,0+ iso-C3 H7 CD2 COCD3 9.35 LE 1256

cb h7 d5 o+ iso-C3 H7 CD2 COCD3 9.69 TC 1256

129
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(keal mol-1

) CeHi40+

C(i H14 0+ (n-C3 H7 )2 0 9.27 ± 0.05 PI 147* 182

CeHuCP (tso-C.iHi^O 9.20± 0.05 PI 142* 182

c7 h5 o+

c7 h5 o+ c6 h5 cho H 11.21 ±0.08 EVD 196 130

(Benzaldehyde)

c7 h5 o+ c6 h5 cho H 11.35 + 0.05 SL 199 1237

(Benzaldehyde)

C7 H50+ c6 h5 cho H 11.1 SL 193 308

(Benzaldehyde)

C7 H5 0+ C6 H5 COCH3 CH, 10.43 + 0.05 SL 184 1237

(Acetophenone)

C7 HsO+ c6 h5 coch3 ch3 10.5 SL 186 308

(Acetophenone)

c7h5 o+ c6 h5 coch3 ch3 9.70± 0.09 VC 168 2174

(Acetophenone)

C7 H50+ CeHsCOCD, cd3 10.45 SL 308

(Trideuteroacetophenone)

C7 H5 0+ (C6 H5 )2 CO c6 h5 12.00 + 0.05 SL 217 1237

(Benzophenone)

c7 h5 o+ c6 h5 cooch3 ch3 o 11.4 SL 192 308

(Methyl benzoate)

C7 H5 0+ (CeHsbCCL c6 h5 o 10.01 + 0.07 SL 1237

(Phenyl benzoate)

C7 H5 0+ (C6 H5 )2 C2 02 c6 h5 co 9.70 ±0.05 SL 1237

(Benzil)

c7 h5 o+ c6 h5 conh2 nh2 9.9± 0.1 SL 165 1168

(Benzamide)

C7 H50+ c6 h5 cochn2 chn2 10.42 ± 0.18 VC 2174

(Diazoacetophenone)

C7 H5 0+ (C6 H5)2 C2 N2 0 12.1 ± 0.2 SL 1125

(2,5-Diphenyl-l,3,4oxadiazole)

c7 h5 o+ c6 h5 cof F 11.5 SL 308

(Benzoyl fluoride)

C7 H5 0+ CeHsCOCF, cf3 10.05 SL 308

(Trifluoroacetophenone)

C7 H5 0+ CeHsCOCl Cl 11.18± 0.10 EVD 200 130

(Benzoyl chloride)

c7 h5 o+ c6 h5 coci Cl 10.5 SL 184 308

(Benzoyl chloride)

C7 H5 0+ C6 H5 COBr Br 10.0 SL 189 308

(Benzoyl bromide)

C7HeO+ (Benzaldehyde) Heat of formation 209 keal mol -l

C7 H6 0+ (Tropone) 240 keal mol -l

C7 H6 0+ CeHsCHO 9.51 ±0.02 PI 209* 416

(Benzaldehyde)

C7 H6 0+ CgHsCHO 9.60 ±0.02 PI 211 1166

(Benzaldehyde)

C7FI60+ C6 H5 CHO 9.53 ±0.03 PI 209* 182

(Benzaldehyde)

130
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c7 h6 o+ c6 h5 cho 9.90 ±0.02 EVD 218 127

(Benzaldehyde)

c7 h6 o+ c6 h5 cho 9.63 ±0.09 EVD 212 130

(Benzaldehyde)

C7 H60+ C6 H5 CHO 9.51 ±0.05 SL 209 1237

(Benzaldehyde)

c7 h6 o+ c6 h5 cho 10.1 SL 222 308

(Benzaldehyde)

c7 h6 o+ c6 h5 cho 9.73 ±0.03 cs 214 2026

(Benzaldehyde)

c7 h6 o+ c7 h6 o 9.68 ±0.02 cs 240* 431

(Tropone)

c7 h6 o+ c7 h6 o 9.69 ±0.02 LE 240 431

(Tropone)

c7 h7 o+

c7 h7 o+ c6 h4 ohch2 7.58 TC 136

(p-Hydroxybenzyl radical)

cycfo-C6H5 CH2 OH+ Heat of formation 186 kcal mol -1 cyclo-C6 H5 OCH+ 173 kcal mol -1 C7 H80+ (m-Cresol) 165 kcal mol'-1 c7 h8 o+ c6 h5 ch2 oh 9. 14 ±0.05 CS 186* 2025

(Benzyl alcohol)

C7 H8 0+ CeHsOCH, 8. 20 ± 0.02 PI 173* 416

(Anisole)

c7 h8 o+ c6 h5 och3 8.22 ± 0.02 PI 173* 182

(Anisole) c7 h8 o+ c6 h5 och3 8.83 SL 188 1066

(Anisole)

C7 H8 0+ C6 H5 OCH3 9.01 TC 192 136

(Anisole)

c7 h8o+ c6 h4 ohch3 8.93 SL 175 1066

(o-Cresol)

C7 H8 0+ CehLOHCHg 8.98 SL 175 1066

(m-Cresol)

c7 h8 o+ c6 h4 ohch3 8.52 ±0.05 CS 165* 2025

(m-Cresol)

c7 h8 o+ c6 h4 ohch3 8.97 SL 177 1066

(p-Cresol)

C7 H8 0+ C6 H4 OHCH3 8.87 TC 175 2194

(Cresol)

c7 h14 o+

C7 H14 0+ n-C5 Hn COCH3 9.33 ±0.03 PI 143* 182

c8 h«o

c8 h6 o+ c8 h6 o 8.67 TC 136

(Benzofuran) c8 h6 o+ c6 h5 cochn2 n2 10.08 ± 0.11 VC 2174

(Di azoacetophenone)

131
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c8 h7 o+

c8 h-o+ c6 h,ch2 coch. ch3 9.90± 0.17 VC 170 2174

(Benzyl methyl ketone)

C8H8 0+ (Acetophenone) Heat of formation 191 kcal mol l C8 H8 G+ (p-Methylbenzaldehyde) 194 kcal mol l c8 h8 o+ c6 h5 coch3 9.27 ±0.03 PI 191* 182

(Acetophenone)

C8 HhO+ CK H5 COCH.i 9.48 ±0.05 SL 196 1237

(Acetophenone)

c8 h8 o+ c6h5 coch3 9.7 SL 201 308

(Acetophenone)

C8 H8 0+ CeHsCOCHa 9.34 ±0.04 VC 192 2174

(Acetophenone)

c8 h8 o+ c6 h5 coch3 9.32 ±0.02 cs 192 2026.2025

C8 H8 0+ CeHjCHaCHO 9.33 ±0.05 cs 194* 2026

(p-Methylbenzaldehyde)

C8 H8 0+ CelLCHaCHO 9.31 TC 194 2194

(Methylbenzaldehyde)

c8 h9 o+

c8 h9 o+ c«h4 och3 ch2 7.66 TC 180 136

(m-Methoxybenzyl radical)

c8 h9 o+ c6 h4 och3 ch2 6.82 ±0.1 SL 160 69

(p-Methoxybenzyl radical)

C8 Hh O+ C6 H40CH3 CH2 7.58 TC 178 136

(p-Methoxybenzyl radical)

c8 h9 o+ c«h5 ch,och3 H 10.65 ±0.1 SL 174 122

(Benzyl methyl ether)

c8 h9 o+ c6 h4 och3 ch3 H 12. 13 ±0.1 SL 205 122

( m-Methylanisole)

c8 h9 o+ c6 h4 och3 ch3 H 1 1 .98 ±0.1 SL 201 122

(p-Methylanisole)

c8 h9 o+ c7 h7 och3 H 9.70±0.1 SL 177 122

(7-Methoxycycloheptatriene)

C8 H9 0+ ChH4 OCH3 C2 H5 CH:i 10.80±0.1 SL 188 122

(p-Ethylanisole)

c8h7d2 o+

C8 H7 D2 0+ CelLOCHaCD, D 12. 10 ± 0.

SL 122

( m-Methyl-c(3 -anisole)

c8 h7 d2 o+' Ck H4 OCH3 CD3 D 12. 10 ± 0.

SL 122

(p-Methyl-d3 -anisole)

c8 h«d3 o+

C8 Hk D3 0+ ChH4 OCH3 CD3 H 12. 10 ± 0.

SL 122

( /7!-Methyl-</3 -anisole)

c8 h6 d3 o+ c«h4 och3 cd3 H 12. 10 ± 0.

SL 122

(p-Methyl-d3 -anisole)

C8 H«D3 0+ ChH4 OCD3 C2 H-) CUs 1 1.70 ± 0.1 SL 122

( m-Methoxy-d3 -ethylbenzene)

C8 Hk D3 0+ ' ChH4 OCD3 C2 H5 ch3 10.90 ±0.1 SL 122

(p-Methoxy-c(3 -ethylbenzene)

132
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C8 HioO+ (Benzyl methyl ether) Heat of formation 184 kcal mol 1 C8 Hi0O+ (Phenyl ethyl ether) 167 kcal mol 1 C8 Hi0O+ (m-Methylanisole) 169 kcal mol-1

CsH10 O+ C6 H5 CH2 OCH3 8.85 ±0.03 PI 184* 416

(Benzyl methyl ether)

C«H10 O+ C6 H5 CH2 OCH3 9.3^1 ±0.1 SL 195 122

(Benzyl methyl ether)

Cs H10 O+ C8 H5 CH2 OCH3 8.83 ±0.05 cs 184 2025

(Benzyl methyl ether)

C«H10 O+

, C«H5 OC2 H5 8. 13 ±0.02 PI 167* 182

(Phenyl ethyl ether)

C8 H10 O+ c.iloch.ch. 8.56±0.1 SL 174 122

( m-Methylanisole)

c8 h10 o+ c6 h4 och3 ch. 8.31 ±0.05 CS 169* 2025

(m-Methylanisole)

C8 H,oO+ C,; H40CH3 CH3 8.48±0.1 SL 173 122

(p-Methylanisole)

c8 h10 o+ c6 h4 och3 ch3 8.59 TC 175 2194

(Methylanisole)

c8 hI0 o+ c7 h7 och3 8.58±0.1 SL 203 122

(7-Methoxycycloheptatriene)

CgHioO+

c4 h10 o+ c6 h5 ch2 coch3 9. 14 ±0.09 VC 186 2174

(Benzyl methyl ketone)

C9 H,oO+ C6 H5 COC2 H5 9.27 ±0.05 cs 189* 2025

(Phenyl ethyl ketone)

C9 H,oO+ Ce^COCILCHa 9.15 ±0.05 cs CO CM * 2035

( m-Methylacetophenone)

C9 H10 O+ Cfi H4C0CH3 CH3 9.03 TC 179 2194

(Methylacetophenone)

Ci2 H8 0+

Ci 2 H8 0+ Ci 2 H8 0 8.59 TC 136

(Dibenzofuran)

c12 h9o+

C12 H9 0+ (C6 H5 >2 0 H 12.90 ±0.05 SL 262 1237

(Phenyl ether)

Ci-2 H9 0+ (C6 H5)2 C03 co2 + h 12.51 ±0.05 SL 244 1237

(Diphenyl carbonate)

c12 h10 o+

C12 H10 O+ (CeHshO 8.82 ±0.05 SL 220* 1237

(Phenyl ether)

C12 HioO+ (C6 H5 )2 C03 co2 10.78 ±0.05 SL 257 1237

(Diphenyl carbonate)

Ci3Hi0O+ (Benzophenone) Heat of formation 229 kcal mol-1

C13 H10 O+ (C«H5 >2 CO 9.46 ±0.05 SL 231* 1237

(Benzophenone)

C13 HioO+ (CeHshCO 9.35 ±0.04 CS 228* 2026

(Benzophenone)

133
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c14 h12 o+

Ci4Hi20+ CslLCfLCOCeHs 9.13 ± 0.05 cs 214* 2026

(p-Methylbenzophenone)

c14 h12 o+ Cn^CHaCOCeHs 9.08 TC 213 2194

(Methylbenzophenone)

cho+2 CHO+ CHaCOOH CHj 14.15 LE 189 171

CHO+ CD3 COOH CDa 14.08 LE 171

ch2 o2+ CH2 0.| HCOOH 11.05 ± 0.01 PI 164* 182, 416

ch2 o+ HCOOH 11.44 ±0.08 EVD 173 127

ch3 o2+ CH:s O; HCOOC0H5 C2 Ha 1 1 .60 ±0.1 SL 114 210

ch3 o+ HCOOC2 H5 c2 h3 11.73 ±0.1 VC 116 1059

CH3O.J HCOOC2 Hs C2 Ha 1 1 .3 ± 0.

VC 107 1100

CH3O+ hcooc3 h7 ch3 c=ch2 ? 11.0±0.1 VC 102 1100

c2 h2 o^

c2 h2 o.+ CHOCHO 9.48 ±0.08 EVD 145* 128

c2 h2 o2+ CHOCHO 10.25 ±0.20 EVD 128

c2 h3 o2+

c2 h3 o2+ HCOOC2 H5 CHa 11.51 ±0.1 VC 143 1059

ch3 cooh+ Heat of formation 135 kcal mol-1

HCOOCH3+ 166 kcal mol 1 c2 h4 o+ CH3 COOH 10.35 ±0.03 PI 135* 416

c2 h,o,+ CHiCOOH 10.37 ±0.03 PI 135* 182

c2 h4 o2 CHaCOOH 10.88 ±0.01 CS 147 2026

C2 H4 02+ CHaCOOH 10.66 ±0.05 cs 142 384

c2 h4 o2+ CHaCOOH 10.72 LE 143 171

c2 h4 o+ HCOOCHa 10.815 ±0.005 PI 166* 182

QKUO* HCOOCHa 10.92 ±0.09 SL 168 411

C21L0+ HCOOCHa 11.12 ±0.1 SL 173 210

G2 H40+ HCOOCHa 11. 14 ±0.03 VC 173 305

C2 H40+ HCOOCHa 10.4 ±0.1 VC 156 1100

c2 h4 o+ (HzCOb 10.51 ±0.03 PI 1166

c2 h4 o2+ CH3 COOC2 H5 c2 h. 11.15 ±0.1 VC 138 1059

c2 hd3 o/

c2 hd3 o2+ CDaCOOH 10.71 LE 171

134
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c2 h5 o2+

c2 h5 o+ CH3 COOC2 H5 C2 H3 10.80 ± 0.1 SL 77 1413

C2 H5 0; ch3 cooc2 h3 c2 h3 10.95 ±0.1 VC 81 1059

c2 h5 o+ ch3 cooc2 h5 c2 h3 10.8 ± 0.1 VC 77 1100

c2 h5 o+ ch3 cooc3 h7 ch3 c=ch2 ? 10.5 VC 71 1100

C2 H,0; CH3 COOCH(CH3 )2 ch3 c=ch2 ? 10.42 ±0.1 SL 66 1413

c3 h4 o2+

C3 H4 O+ ch3 cocho 9.60 ±0.06 EVD 155 128

C3 H.,02 CH3 COCHO 10. 18 ± 0. 17 EVD 128

C3 H4 CL C3 H4 02 9.70 ± 0.01 PI 182

(Propiolactone)

C.3 H5 0+ Heat of formation 113 kcal mol 1 c3 h5 o+ HCOOQH5 H 11. 05 ±0.1 VC 114* 1059

C3 H50+ CH3 COOC2 H5 ch3 10.95±0.1 VC 113* 1059

c3 h4 do2+ C3 H4 DO+ HCOOCD2 CH3 D 1 1 . 05 ± 0.

VC 1059

c3 h3 d2 o2+

C3 H3 d2 o+ hcoocd2 ch3 H 10.97 ± 0.

VC 1059

c2 h5 cooh+ Heat of formation 127 kcal mol 1 hcooc2h+ 156 kcal mol 1 CH3 COOCH+ 138 kcal mol-1

c3h6 oj C2 H5 COOH 10.24 ±0.03 PI 127* 182

CsHeO^ hcooc2 h5 10.61 ± 0.01 PI 156* 182

C3 HeO^ hcooc2 h5 10.70 ±0.1 SL 158 210

c3 h6o2+ hcooc2 h5 10.16±0.04 VC 145 305

C3 He02 hcooc2 h5 10.79± 0.1 VC 160 1059

c3 h6 o^ hcooc2 h5 10.3±0.1 VC 149 1100

C3 H6O.J CBLCOOCH, 10.27 ±0.02 PI 138* 182

CsHeO^- CH3 COOCH3 10.58± 0.09 VC 145 305

c3 h6 o^ ch3 cooch3 10. 8 ± 0.1 VC 150 1100

c3 h|o+ ch3 cooch3 10.52 ±0.02 cs 143 2026,2025

C3 H4 D2 Ot

c3 h4 d2 o+ HCOOCD2 CH3 10.75±0.1 VC 1059

c3 h7o2+

c3 h7 o2+ (CH3 0)2 CH2 H 10.38± 0.03 RPD 102 1139

c3 h7 o+ (CH3 0feCHCH3 ch3 10.34±0.07 RPD 112 1139

c3 h7 o+ C2 H5 COOC2 H5 c2 h3 10.67 ±0.1 SL 68 1413

c3 h7 o+ c2 h5 cooc2 h5 c2 h3 10.77 VC 70 1059

c3 h7 o+ c2 h5 cooc2 h5 c2 h3 10.4±0.1 VC 61 1100

c3 h7 o+ C2 H5 COOCH(CH3 )2 ch3 c=ch2 ? 10.40±0.1 SL 66 1413

c3 h7 o+ (CH3 0)3 CH ch3 o 10.36± 0.06 RPD 118 1139

135
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c3 h8 o2+

c3 h8 o^ (CH3 0)2 CH2 10.00±0.05 PI 145* 0182

CH3 COOCH=CH^ Heat of formation 137 kcal mol--1 CH3 COCOCH3+ 135 kcal mol"-1 C4 H60J ch3 cooch=ch2 9.19± 0.05 PI 137* 182

c4 h6 o+ ch3 cococh3 9.23 ±0.03 PI 135' 182

C4 H6 0j ch3 cococh3 9.25 ±0.03 PI 135* 416

C4HeO^ ch3 cococh3 9. 60 ±0.02 EVD 143 128

C4 HeO^ CHsCOCOCHa 10.22 ± 0.18 EVD 128

n-C3 H7 COOH+ Heat of formation 121 kcal mol-1

iso-C3 H7COOH+ 113 kcal mol-1

HCOOC3H| 149 kcal mol-1

CH3 COOC2 H5+ 126 kcal mol-1

c2 h5 cooch3+ 127 kcal mol-1

C4 H8 O2 (p-Dioxane) 126 kcal mol-1

C4 H8 OJ n-C3 H7 COOH 10.16±0.05 PI 121* 182

C4 H8 O2 iso-C3 H7 COOH 10.02 ±0.05 PI 113* 182

c4 h8 o2+ HCOOCH2 CH2 CH3 10.54 ±0.01 PI 149* 182

c4 h8 o2+ ch3 cooc2 h5 10.09 ±0.02 PI 126* 416

C4 H80+ ch3 cooc2 h5 10.11 ±0.02 PI 127* 182

c4 h8 o+ ch3 cooc2 h5 10.64 RPD 2018

c4 h8 o+ ch3 cooc2 h5 11.1 RPD 2018

c4h8 o2+ ch3 cooc2 h5 11.6 RPD 2018

C4 H80+ ch3 cooc2 h5 10.13±0.02 VC 127 305

c4 h8 o2+ ch3 cooc2 h5 10.32±0.i VC 131 1059

c4 h8 o+ ch3 cooc2 h5 10.2±0.1 VC 129 1100

c4 h8 o+ ch3 cooc2 h5 10.40±0.05 cs 133 2025

c4 h8 o2+ C2 H5COOCH3 10.15±0.03 PI 127* 182

c4 h8 o+ c4 h8 o2 9. 13 ±0.03 PI 126* 182

(p-Dioxane)

c4 h8o+ c4 h8 o2 9.8 EC 141 218

(p-Dioxane)

c4 h9o+

c4 h9 o+ (CH3 0)3 CCH3 ch3 o 10.37 ±0.02 RPD 112 1139

C4 HioO+

2 C4H10O+ (CH3 0)2 CHCH3 9.65 ±0.03 PI 129* 182

C5H40+

C5 H40+ c4 h3 ocho 9.21 ±0.01 PI r-H CO * 182

( 2 -Furaldehyde)

C5 H4 O+ C4 H30CH0 9.31 ±0.09 SL 190 411

( 2 -Furaldehyde)

136
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c5 h8 o+ ch3 coch2 coch3

c5 h8o+

8.87 ±0.03 PI 122* 182

C5 H10 O2+ HCOO(CH2 )3CH3

c5 h10o+

10.50± 0.02 PI 144* 182

C5 H10O+ HCOOCH2 CH(CH3 )2 10.46 ±0.02 PI 139* 182

c5 h10 o2+ ch3 cooch2 ch2 ch.3 10.04 ±0.03 PI 119* 182

C5 H10 O2+ CHaCOOCHCCHa), 9.99 ±0.03 PI 115* 182

c5 h10 o+ c2 h5 cooc2 h5 10.00 ±0.02 PI 117* 182

C5 Hi 0 O^ c2 h5 cooc2 h5 10.2 ±0.1 VC 122 1100

C5 H10 O2+ n-C3 H7 COOCH3 10.07 ±0.03 PI 122* 182

C5 H,oO+ iso-C3 H7 COOCH3 9.98 ±0.02 PI 118* 182

C5 H12 02+ (QHsOfeCH,

c5 h12 o+

9.70± 0.05 PI 134* 182

CeHiO^ C6 H4 02

c6 h4 o

9.67 ±0.02 PI 198* 1166

( p-Benzoquinone)

CeHeO^" CetLdOH^

c6 h6 o+

8.85 TC 133 2194

(Dihydroxybenzene)

C6 H12 0+ CHaCOOC^g

C6 H1202

9.56 ±0.03 PI 102* 1166

C6 H12 0+ CH3 COO(CH2 )3 CH3 10.01? PI 112* 182

C6 H12 02+ CHaCOOC^CHiCH,), 9.97? PI 109* 182

C6 H12 0+ CH3 COOCH(CH3 )C2 H5 9.91 ±0.03 PI 108* 182

C7HeO£(Benzoic acid) Heat of formation 152 kcal mol-1

C7 H6 0£(p-Hydroxybenzaldehyde) 157 kcal mol-1

c7 h6 o+ c6 h5 cooh 9.73 ±0.09 cs 152* 2026

(Benzoic acid) c7 h6 o+ c6 h4 ohcho 9.32 ±0.02 cs 157* 2026

(p-Hydroxybenzaldehyde)

c7h6 o+ c6 h4 ohcho 9.29 TC 156 2194

(Hydroxybenzaldehyde)

C7 H3 02+ C7 Hfi 02 9.86 ±0.02 CS 431

(Tropolone)

(J 7 H6U+ C7 H8 02 9.83 ±0.02 LE 431

(Tropolone)

c7 h8 o+ c6 h4 ohoch,3

c7 h8 o+

8.58 TC 137 2194

(Methoxyphenol)

137
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c8h8o+

c8 h8 o+ c6 h5 coch2 oh 9.33 ±0.05 CS 159* 2025

(a-Hydroxyacetophenone)

c8 h8 o+ c6 h5 cooch3 10.0 SL 159 308

(Methyl benzoate)

C8 H8 0+ CeHsCOOCHs 9.35 ±0.06 CS 144* 2026

(Methyl benzoate)

C8 H8 02+ CfilROCHaCHO 8.60± 0.03 CS 150* 2026

(p-Methoxybenzaldehyde)

C8 H8 0+ C6 H40CH3 CH0 8.91 TC 157 2194

(Methoxybenzaldehyde)

c8 h8 o+ c6 h4 ohcoch3 8.67 ±0.05 CS 134* 2025

( m-Hydroxyacetophenone)

c8h8 o+ c6 h4 ohcoch3 8. 70 ±0.03 CS 135* 2026

(p-Hydroxyacetophenone)

C8 H8 0+ C6 H4 OHCOCH3 9.01 TC 142 2194

(Hydroxyacetophenone)

C9H10O 2 C9H10 O+ C6 H5 COCH2 OCH3 8.60 ±0.05 CS 142* 2025

(a-Methoxyacetophenone)

c9 h10 o2+ c6 h4 och3 coch3 8.53 ±0.05 CS 140* 2025

( m-Methoxyacetophenone)

c9 h10 o+ c6 h4 och3 coch3 8.62 ±0.05 CS 142* 2026

( p-Methoxyacetophenone)

c9 h10 o+ c6 h4 och3 coch3 8.72 TC 144 2194

(Methoxyacetophenone)

C9H10O+ Cg^CILCOOCH., 8.94 ±0.04 CS 130* 2026

(Methyl p-toluate)

c9 h10 o2+ c6 h4 ch3 cooch3 9.04 TC 132 2194

(Methyl toluate)

C13H10O2

C13 H10 O+ CetLOHCOGJL 8.59 ±0.05 CS 165* 2026

(p-Hydroxybenzophenone)

C! 3 H,„0+ QILOHCOChH-, 9.07 TC 176 2194

(Hydroxybenzophenone)

C13 HioO+ (ChH5 >2 CO, 8.98 ±0.05 SL 177* 1237

(Phenyl benzoate)

DC 00

C14 H10 O+ (CeHshQO, 8.78 ±0.05 SL 181* 1237

(Benzil)

C14H12O2

Cl 4 H12 0+ C«H40CH,3C0C«H5 8.77 TC 178 2194

(Methoxybenzophenone)

c4 h8oj

C4 HhO.+ ch5 och2 cooch3 9.56 ±0.05 CS 88 * 2025

138
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C4 H9 03+ (CHsO^CH

C4H90+

H 10.39 ±0.05 RPD 66 1139

C4 H9 0+ (CHoOfeCCHg CH3 10.39±0.10 RPD 78 1139

C4 H9 0+ (CHiO^C ch3 o 10.32±0.10 RPD 80 1139

C8 H80+ QILOHCOOCHa

c8 h8 o+

9.03 TC 94 2194

(Methyl hydroxybenzoate)

C9 H10 O+ CetROCHaCOOCHa

C9H10O3

8.43 ±0.04 CS 90* 2026

(Methyl p-methoxybenzoate)

C9 H10O+ Cfi H4 OCH3 COOCH3 8.73 TC 97 2194

(Methyl methoxybenzoate)

CiaHioOi' (CnHshCOa

C13H10O3

9.01 ±0.05 SL 122* 1237

(Diphenyl carbonate)

C6 Hn O+ C7 H14 06

CeHnOg

ch3 o 12.9±0.16 EVD 28 2036

(a-Methyl-(D)-glucoside)

CfiHnOj C7 hli 4 06 CHjO 13.5 ± 0.16 EVD 42 2036

(jS-Methyl-(D)-glucoside)

HNO+ HN03 HNO+11.03±0.01 PI 222 1253

C2 H6 BO+ (CHaOhB

C2 H,jBO+ CH.O+OH 16.6±0.3 EVD 187 115

C2 H5 BO+ (CHaO)3 B

C2 H5 BO+

ch2 o+h2 13.2 ± 0.2 EVD 117 115

C2 H«B02+ (CH3 0)2 BH

c2 h6bo+

H 9.0 ± 0.2 SL 16 364

C2 H6 B02+ (CH,)0)3 B CH3 0 13.0±0.2 EVD 85 115

C2 H«BO.+ (CHaOhB ch3 o 9.6±0.2 SL 7 364

C2 H7 B02+ (CH3 0>2 BH

c2 h7 bo+

9.7 ± 1.0 SL 84 364

C2 H«BO+ (CHaOhB

C2 Hs BO+

CH, 12.1 ±0.2 EVD 31 115

139
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

C3 H9 B03+ (CH3 0)3 B

c,h9 bo+

10.8 ± 0.3 EVD 34 115

C3 HyBO+ (CH3 0)3 B 8.9 + 0.2 SL -10 364

ch3 no+ hconh2 ch3 no+10.25 ±0.02 PI 190* 182

C2 H5 NO+ CHgCONH,

c2 h5 no+

9.77 ±0.02 PI 171* 182

C2 H5 NO+ CHaCONH, 10.39 ±0.05 cs 186 384

C3 H7 NO+ HCON(CH3 >2

c3 h7 no+

9.12±0.02 PI 160* 182

C3 H7 NO+ CHaCONHClL 8.90 ±0.02 PI 150* 182

C4 H9 NO+ CH3CON(CH3 >2 c4 h9 no+

8.81 ±0.03 PI 145* 182

C5 H3 NO+ C5 H4 NOH

c5 h5 no+

9.70 ±0.05 SL 209* 217

(4-Hydroxypyridine)

C5 Hn N0+ HCONiCaHafe

C5 HnNO+

8.89 ±0.02 PI 145* 182

C6 H,N0+ C5H4NCHO

c6 h5 no+

9.75 ±0.05 SL 227* 217

( 2-Pyridinecarboxaldehyde)

C6 H5 NO+ C5H4NCHO 10. 12 ±0.05 SL 235* 217

(4-Pyridinecarboxaldehyde)

c6 h7 no+ c6 h4 ohnh2 c6 h7 no+

8.13 TC 166 2194

(Aminophenol)

C6 H13 NO+ CH3 CON(C2 H5 )2 c6h13 no+

8.60 ± 0.02 PI 130* 182

cyclo-C«H5 NCO+ c7 h5 no+ c6 h5 nco

Heat of formation 222 kcal mol 1

8.77 ±0.02 PI 222 * 182

(Phenyl isocyanate)

C7 H.5 NO+ CelLOHCN 9.60 TC 227 2194

(Cyanophenol)

C7 R3 NO+ (C6 H5 )2 C2 N2 0 10 . 8 ± 0.1 SL 1125

(3,5-Diphenyl-l ,2,4-oxadiazole)

140
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) C7 H7 NO(Benzamide) Heat of formation 197 kcal mol-1 C7 H7 NO+(p-Aminobenzaldehyde) 182 kcal mol-1

C7 H7 NO+ ChH5 CONH2 9.4 ± 0.2 SL 195* 1168

(Benzamide)

c7 h7 no+ c6 h5 conh2 9.64 SL 200* 1126

(Benzamide)

C7 H7 NO+ CfiHiCHONH, 8.25 ±0.02 cs 182* 2026

(p-Aminobenzaldehyde)

c7 h7 no+ c«ilchonh2 8.38 TC 185 2194

(Aminobenzaldehyde)

c7 h7 no+ c7 h7 no 9.43 ±0.02 CS 431

(2-Aminotropone)

c7 h7 no c7 h7 no 9.50 ±0.02 LE 431

(2-Aminotropone)

C7 H9 NO+

C7 H9 NO+ C6 H4NH2 OCH.3 7.82 SL 169* 1066

(p-Methoxyaniline)

c8 h5 no+

C8 H5NO+ CbHjCHOCN 10.38 TC 221 2194

(Cyanobenzaldehyde)

c8h9 no+

C8 H9 NO+ C6 H5 NHCOCH3 8.39±0.10 SL 171* 1126

(Acetanilide)

c8h9 no+ c6 h4 coch3 nh2 8.09 ±0.05 CS 171* 2025

(m-Aminoacetophenone)

C8 H9 NO+ C6 H4COCH3NH2 8. 1 7 ± 0.02 cs 172* 2026

(p-Aminoacetophenone)

C8 H9 NO+ C6 H4 COCH3NH2 8.25 TC 174 2194

(Aminoacetophenone)

c9 h7 no+

c9 h7 no+ c6 h5 coch2 cn 9.56 ±0.05 CS 235* 2025

(ct-Cyanoacetophenone)

C9 H7 NO+ CelLCOCHaCN 9.95 TC 240 2194

(Cyanoacetophenone)

C13 HnNO+

C13 Hn N0+ CelLN^COCeHs 8.30 TC 208 2194

(Aminobenzophenone)

C14 H9 NO+ C14 H9NO+ CeBLCNCOCeHs 9.81 TC 269 2194

(Cyanobenzophenone)

c2 hn2 o+

C2 HN2 0+ CHaCOCHN, ch3 11.42 ± 0.08 VC 2174

c2 hn2 o+ ch2 cicochn2 ch2 ci 10.95±0.15 VC 2174

C2 HN2 0+ CClsCOCHN, CCla 10.12 ± 0.08 VC 2174

141

323-656 0- 69—10
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c3 h4 n2 o+

c3 h4n2 o+ ch3 cochn2 9.40 ±0.03 VC 2174

c8 h5 n2 o+

c8 h5 n2 o+ C6 H5 C2 N2 OC3F7 11.8±0.2 SL 2156

(2-Phenyl-5-perfluoropropyl-l,3,4-oxadiazole)

c8 h5n2 o+ c6 h5 c2 n2 oc7 f15 12.1 ±0.1 SL 2156

(2-Phenyl-5-perfluoroheptyl-l,3,4-oxadiazole)

c8 h6 n2 o+

c8 h6 n2 o+ c6 h5 cochn2 9.22 ±0.04 VC 2174

(Diazoacetophenone)

Ci4HioN2 0+

c14 h10 n2 o+ (CeHskCaNaO 9.2 ±0.1 SL 1125

(3,5-Diphenyl-l ,2,4-oxadiazole)

Ci4 Hi 0 N2 O+ (C6 H5 )2C2 N2 0 8.9± 0.3 SL 1125

(2 ,5-Di phenyl-1 ,3 ,4-oxadiazole)

ch2 no+

CH2 NO+ ch3 no2 H 11.97 ±0.02 VC 206* 90

CH3 NO^ Heat of formation 238 kcal mol-1

CH3 NO+ CHgNO, 11.08 ±0.03 PI 238* 182

CH3 NO+ CHgNOa 11. 130 ± 0.006 PI 239* 1253

CH3 NO+ ch3 no2 11.4 RPD 2018

CH3 NO+ ch3 no2 11.9 RPD 2018

CH3 NO+ CHaNO, 12.8 RPD 2018

CH3 NO+ CHaNOa 11 . 34 ±0.09 VC 244 90

C2H5 NOI, Heat of formation 227 kcal mol 1

C2 H5 NO+ c2 h5 no2 10.88 ±0.05 PI 227* 182

C2 H5NO+ c2 h5 no2 11.2 RPD 2018

c2 h5 no+ c2 h5 no2 11.6 RPD 2018

c2 h5 no+ C2 H5N02 12.0 RPD 2018

c2 h5 no+ c2 h5 no2 12.6 RPD 2018

c2 h5 no+ C2H5N02 13.1 RPD 2018

c2 h5 no+ NH2 CH2 COOH 9.5 ±0.2 LE 122 88

re-C3 H7 NOt Heat of formation 221 kcal mol-1

iso-C3 H7NO| 217 keal mol 1 c3 h7 no+ n-C3 H7 N02 10.81 ±0.03 PI 221 * 182

c3 h7 no2+ n-C3 H7 N02 11.1 RPD 2018

c3 h7no+ n-CaH7 N02 11.4 RPD 2018

c3 h7 no+ n-C3 H7 N02 11.8 RPD 2018

c3 h7 no+ n-C3 H7 N02 12.6 RPD 2018

c3 h7 no2+ I50-C3H7 N02 10.71 ±0.05 PI 217* 182

142
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C4H5NO+

C4 H5 NO+ CH2 CNCOOCH3 10.87 ± 0.05 cs 185 2025

C6H5NO+

c6 h5 no2+ c6 h5 no2 9.92 PI 244* 182

(Nitrobenzene) c6 h5 no+ c6 h5 no2 10.18 SL 250 1066

(Nitrobenzene)

c6 h13 no+

C6 Hi3 N02+ C2 H5 CH(CH3 )CH(NH2 )COOH 9.5 ± 0.2 LE 99 88

(Isoleucine)

c7 h6 no+

c7 h6 no+ c6 h4 no2 ch2 8.56 ± 0.1 SL 227 * 69

(m-Nitrobenzyl radical)

c7 h7 no+

c7h7 no+ c6 h4 ch3 no2 9.65 ± 0.05 CS 233 * 2025

(m-Nitrotoluene)

C7 H7 NO+ CeHjCHaNO, 9.82 SL 237 * 1066

(p-Nitrotoluene)

C7H7NO+ C6 H4 CH3N02 9.70 TC 234 2194

(Nitrotoluene)

c8 h9 no+

C8 H9 N02+ CelRNH.COOCHa 8. 08 ± 0.01 CS 122 * 2026

(Methyl p-aminobenzoate) c8 h9 no2+ c6 h4 nh2 cooch3 8.25 TC 126 2194

(Methyl aminobenzoate)

c9h7 no+

C9 H7 NO+ CetRCNCOOCHa 10.06 TC 195 2194

(Methyl cyanobenzoate)

c6 h6 n2 o+

c6 h6 n2 o2+ c6 h4 nh2 no2 8.66 SL 215 * 1066

(o-Nitroanihne) c6h6 n2 o2+ c6 h4 nh2 no2 8.80 SL 218 * 1066

(m-Nitroaniline) c6 h6 n2 o+ c6 h4 nh2 no2 8.85 SL 219* 1066

(p-Nitroaniline)

ch2 no+

ch2 no3+ c2h5 ono2 ch3 10.13 ± 0.11 VC 164 1013

c2 h5 no+

c2 h5 no3+ c2 h5ono2 11.22 PI 222 * 182

143
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c3 h7 no+

c3 h7 no3+ n-C3 H7 0N02 11. 07 ± 0.02 PI 213 * 182

c6 h5 no+

c6h5 no+ C6 H40HN02 9.52 SL 187 * 1066

(p-Nitrophenol)

c6h5 no+ CsKtOHNO, 9.67 TC 191 2194

(Nitrophenol)

c7 h5 no+

C7 HsNO+ CeFUCHONO, 10.27 + 0.01 CS 217* 2026

(p-Nitrobenz aldehyde)

C7H5 NO+ c6 h4 chono2 10.40 TC 220 2194

(Nitrobenzaldehyde)

c8 h7 no+

c8 h7 no+ CelRNO.COCHi 9.89 + 0.05 CS 201 * 2025

(m-Nitroacetophenone)

c8 h7 ncl C«R4 N02 C0CHi 10.07 ± 0.02 CS 205 * 2026

(p-Nitroacetophenone)

C8 H7 NO+ Ch 1LN02 C0CH3 10.10 TC 206 2194

(Nitroacetophenone)

c13 h9 no+

c13 h9 no+ C«H4N02 C0C6 H5 10.57 TC 249 2194

(Nitrobenzophenone)

c8 h7 no+

C8 H7 NO| c6 h4 no2 cooch3 10.20 ± 0.03 CS 160* 2026

(Methyl p-Nitrobenzoate)

c8 h7 no,+ c6 h4 no2 cooch3 10.20 TC 160 2194

(Methyl nitrobenzoate)

F+ Heat of formation 42

kcal mol-1

F

+ F 17.426 s 421 * 2113

F

+ bf3 31 . 5±2 EVD 440

F

+ cf4 36 ±1 SL 24

F

+ cf4 cf3 24. 0 ± 1.0 NS 447 2157

F

+ C2 Fh 22.6 LE 1062

F

+ c«f8 c«f5 29.2 ± 0.5 SL 1132

(Hexafluorobenzene)

F

+ c3 f8 23.5 LE 1062

F+ c4 f8 24.0 LE 1062

(Perfluorocylobutane)

F

+ nf3 N + F + F-? 25 ± 1 SL 480 401

F

+ cf3 ci 31 ±1 SL 24

F

+ cio3 f 27 ±3 SL 53

F

+ F 17 . 4 ± 0.3 VC 420 2165

F

+ CF3 Br 29 ± 1 SL 24

F

+ CF3 I 33 ± 1 SL 24

144
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

n f2

F+r 2

15.7 S 362* 355

F

+ f2 15.83 ±0.05 SL 365 75

HF+

( 2 n> HF

HF+

15.77 ± 0.02 RPD 299* 463

HF+

(

2 2) HF 16.91 ±0.10 RPD 325 463

XeF+ XeF2 XeF+

F 13.3 ±0.1 LE 262 2053

XeF+ XeF4 f2 + f 13.3 ±0.1 LE 236 2053

XeF+ XeF2

XeF+

11.5 ± 0.2 S 239 2181

XeF.} XeF2 12.6±0.1 LE 265 2053

XeF+ XeF4 2F 14.9±0.1 LE 254 2053

XeF3

f XeF4

XeFJ

F 13.1 ±0.1 LE 232 2053

XeF+ XeF4

XeF}

12.9±0.1 LE 246 2053

XeF+ XeF4 13.2 TC 253 2168

XeF4+ XeF4 13.8 TC 267 1164

LiF+ LiF

LiF+

11.3 VC 181 2179

Li2 F+ Li2 F2

Li2 F+

F 11.5 VC 25 2179

BeF+ BeF

BeF+

9.1 ±0.5 VC 168 2141

BeF+ BeF, F 15.4 ± 0.4 VC 147 2142

BeF+ BeF2 F 15.5 VC 149 2141

BeF+ BeF2

BeF+

14.5 ±0.4 VC 145 2142

BeF+ BeF, 14.7 ± 0.4 VC 149 2141

BF+ BF

BF+ Heat of formation 233 kcal mol11.5±0.4

lVC 236* 1297

BF+ BF 10.93 TC 223 1268

BF+ BF 11.2 ± 0.4 LE 229* 440

BF+ BF3 2F? 25.2 ± 0.2 EVD 272 440

145
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

BF+ Heat of formation 87 kcal mol--1

BF+ bf3 F 16.2 ± 0.2 SL 83* 364

BF+ bf3 F 16.17 ± 0.05 EVD 82* 440

BF+ bf3 F 16.5±0.8 VC 90* 1297

BF.+ bf3 F 16.25 ±0.2 LE 84* 362

BF+ bf3 F 16.7 ± 0.4 VC 95* 2040

BF+ CH5 BF2 ch3 13.62 ± 0.02 SL (a) 1076

BF+ CH2=CHBF2 QH, 14.8±0.1 SL 86 1076

BF+ c2 h5 bf2 c2 h5 14.3 ± 0.2 SL 91 1076

bf2+ )5o-C3 H7 BF2 150-C3 H7 14.6 ± 0.2 SL 101 1076

BFJ Heat of formation 87 keal mol -1

BF+ bf3 15.5±0.5 SL 86* 364

BFJ bf3 16.4±0.4 VC 106 2040

BF+ bf3 15.5 ± 0.3 LE 86* 362

BFJ bf3 15.7 ±0.1 LE 90* 440

CF+

CF+ CF 13.81 ±0.12 LE 386 129

CF+ cf4 f2 +f-? 22.6 ±0.5 SL 365 24

CF+ cf4 f2 + f? 22.85 ±0.2 NS 371 2157

CF+ cf4 f+f2 ? 27.32 ±0.07 LE 390 129

CF+ c2 f4 14.06 VC 419

CF+ c3 f6 c2 f4 + f? 18.1 VC 295 1290

CF+ c3f6 17.3 VC 1290

(Hexafluorocyclopropane)

CF+ C6 Fh 17.3 ± 0.3 SL 1132

(Hexafluorobenzene)

CF+ c6 f„cf3 15.93 EVD 2192

(Perfluoromethylcyclohexane)

CF+ c2 h3 f 15.43 VC 419

CF+ ch2 f2 HF+H? 18.8 VC 339 1288

CF+ ch2=cf. 15.23 VC 419

CF+ chf3 HF+F? 20.2 ±0.4 EVD 347 43

CF+ chf3 HF+F? 20.75 VC 360 1288

CF+ c2 hf3 15.2 VC 419

CF+ cf3 ci 22.6 ±0.5 SL 24

CF+ cf2 cicf=cf2 17.8 VC 1290

CF+ chf2 ci HF+C1? 17.30±0.15 EVD 322 43

CF+ chfci2 HC1+C1? 16.9 ±0.2 EVD 314 43

CF+ CF3 Br 22.9 ±0.5 SL 24

CF+ cf3 i 19.9 ± 0.3 EVD 439

CF+ cf3 i 20.7 ±1 SL 24

c3 f+

c3f+ CgF6 22 ±1 SL 1132

(Hexafluorobenzene)

c3f+ CeFe 25.9 ±1 SL 1132

(Hexafluorobenzene)

c5 f+

c5f+ CeFe 29.0±0.5 SL 1132

(Hexafluorobenzene)

146
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) cf2+ Heat of formation 237 kcal mol - 1

CF+ cf2 11.7 ± 0.1 SL 235* 2164

CF+ cf2 11.86 ± 0.1 SL 239* 1252

CFj} cf2 13.30±0.12 LE 272 129

CF+ cf4 f2 20.3±0.5 SL 247 24

CF+ cf4 2F 22.2 VC 253 1288

CF+ cf4 2F 22.33 ±0.06 LE 256 129

CF+ cf4 2F 22.45 ±0.2 NS 259 2157

CF+ C2 F4 cf2 15.2±0.3 SL 230 214

CF+ C2 F4 cf2 15.26 ±0.05 SL 231 1252

CFt c2 f4 cf2 15.13 VC 228 419

CF+ C3F6 cf+cf3 ? 19.8 VC 244 1290

CF+ C3F6 c2 f4 ? 17.4 VC 1290

(Hexafluorocyclopropane)

CF+ Cef 11Gb 3 13.93 EVD 2192

(Perfluoromethylcyclohexane)

CF+ ch2 f2 14.8±0.4 LE 2160

CF+ ch2f2 20.7 VC 1288

CF+ chf3 14.7 ± 0.4 LE 2160

cf9+ chf3 20.2 VC 1288

CF+ c2hf3 CHF? 19.28 VC 419

CF+ chf2 ci H + C1-? 16.1 ±0.3 EVD 265 43

CF+ chf3 H + F-? 17.5 ±0.3 EVD 252 43

CF+ CF3 C1 F + Cl 20 ± 1 SL 247 24

CF+ CF3Br F + Br 18.3±0.1 EVD 223 439

CF+ CF3Br F + Br? 21.4±0.2 EVD 439

CF+ CF3 Br F + Br 19.5±0.5 SL 250 24

CF+ CF3 I F + I 17.95 ±0.1 EVD 229 439

CF+ cf3 i F + I 18.5 ±0.6 SL 241 24

CF«

CF+2 cf4 2F 44.3 ±0.3 NS 763 2157

c2 f+

c2f+ c2hf3 HF 14.83 VC 295 419

C3F+

c3f+ CeFe 18.9 ±0.5 SL 1132

(Hexafluorobenzene)

c4 f+

c4f+ CeFe 18 ± 1 SL 1132

(Hexafluorobenzene) c4f+ CeFe 20.2 ±1 SL 1132

(Hexafluorobenzene)

c5fj

c5f

CeFe 22 ±1 SL 1132

(Hexafluorobenzene)

CsF+ CeFe 24.3 ±1 SL 1132

(Hexafluorobenzene)

147
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

CFJ

cfj cf3 10. 10 ±0.05 EVD 119 441

cf3+ cf3 10.2 SL 121 141

cf3+ cf3 10.15±0.06 LE 120 129

cf3+ cf4 F 15.56±0.01 PI 119 1235

CF+ cf4 F 16.0±0.2 SL 129 24

cif cf4 F 16.2 VC 134 1288

CFJ cf4 F 15.40 ±0.05 LE 115 129

CF+ cf4 F 15.9±0.1 NS 127 2157

cf+ c2 f4 CF 13.54 VC 89 419

cf+ c,f4 C + F~? 15.4 FDP 93 1378

CF+ c2 f4 CF 14.4 FDP 109 1378

CF+ c2f6 cf3 14.2 VC 132 1288

CF+ c2f6 cf3 14.3 ±0.1 VC 134 1419

CF+ c2f6 15.4 LE 1062

CF+ c3f6 c2 f3 15.96 VC 155 1290

CF+ c3 f6 c2f3 15.0±0.1 LE 133 1067

CF* c3f6 c2 f3 15.38 VC 1290

(Hexafluorocyclopropane)

CF+ CeFe 17.1 SL 1132

(Hexafluorobenzene)

CF+ CeFe 19.8 ± 1 SL 1132

(Hexafluorobenzene)

cf3+ c3 f8 c2 f5 14.4±0.1 VC 133 1419

CFJ c3f8 c2 f5 14.65 LE 139 1062

cf+ c4f8 15.7 LE 1062

(Perfluorocyclobutane)

CFJ ra-C 4Fio n-C3F7 14.3±0.1 VC 131 1419

of C6FiiCF3 14.4 EVD 2192

(Perfluoromethylcyclohexane)

CF+ chf3 H 14.03 ±0.06 RPD 107 1139

cf+ chf3 H 14.53 ±0.05 EVD 119 441

cf+ chf3 H 14.67 ±0.20 EVD 122 43

cf+ chf3 H 14.42 VC 116 1288

CFJ ch3 cf3 ch3 13.90 ±0.03 SL 109 1075

CFJ CH^CHCFa c2 h3 15.0±0.2 SL 127 1075

CF+ c2 h5 cf3 c2 h5 14.8±0.1 SL 125 1075

CF+ cf3 ci Cl 13.06 ±0.05 EVD 106 441

CFJ cf3 ci Cl 12.7±0.2 SL 98 24

CF+ cf2 cicf=cf2 C2F2 C1 15.63 VC 1290

CF+ CF3Br Br 12.1 EVD 99 441

CF+ CF3Br Br 12. 15 ±0.02 EVD 100 439

CF+ CF3 Br Br 12.2±0.2 SL 101 24

CF+ CF3 Br Br 12.51 ±0.05 SL 108 1131

CF+ cf3 i I 11.28 ±0.02 EVD 94 439

CF+ cf3 i I 11.4±0.4 SL 96 24

CFJ cf3 i I 11.5±0.1 MSD 99 1111

CFf

CF« cf4 F 42.7±0.3 NS 745 2157

148
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c2 fj

C2F3+ c2f4 F 16.00 VC 195 419

C2F3+ c3f6 CF2 + F? 19.32 VC 203 1290

C2F3 c3Fe cf3 16.1 ±0.2 LE 227 1067

C2F3+ c3f6 18.3 VC 1290

(Hexafluorocyclopropane)

C2F3+ c6f„cf3 14.1 EVD 2192

(Perfluoromethylcyclohexane)

c3fj

C3Fg CeFe 16.8 ±0.3 SL 1132

(Hexafluorobenzene)

C3Fg C6F„CF3 16.6 EVD 2192

(Perfluoromethylcyclohexane)

CsFJ

c5 f3+ c6f6 15.8±0.2 SL 1132

(Hexafluorobenzene)

CF+

CF+ CF4 14.36 TC 110 1164

CF+ CF4 14.9±0.2 D 123 1110

c2 f+ Heat of formation 78 kcal mol"-1

c2f+ c2f4 10.12 PI 78* 168

c2f+ c2f4 9.3±0.2 SL 59 214

C2F1 c2 f4 10.12 VC 78 419

c2f+ c3f6 cf2 13.15 VC 80 1288, 1290

c2f+ c3f6 cf2 12.5±0.1 LE 65 1067

C2F+ C3Fe 11.85 VC 1290

(Hexafluorocyclopropane)

c2f+ c4f« c2f4 12.3±0.1 VC 87 1290

(Perfluorocyclobutane)

c2f+ c4f8 c2f4 12.25 LE 86 1062

(Perfluorocyclobutane)

c2f+ c6f„cf3 12.4 EVD 2192

(Perfluoromethylcyclohexane)

c3 f+

c3f+ c6f„cf3 11.9 EVD 2192

(Perfluoromethylcyclohexane)

C5 F+

4 c5f+ c6 f6 cf2 ? 16.1 ±0.3 SL 1132

(Hexafluorobenzene)

149
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c2 fj

c2f+ c2 f5 9.98 ±0.1 SL 18 2164

C*F+ C2F6 F 16.3±0.1 VC 47 1419

c2f+ c2 f6 F 16.05 LE 41 1062

c2f+ c3f8 cf3 15.3±0.1 VC 56 1419

C*F+ C3F8 cf3 15.25 LE 55 1062

C2Fg n-C4Fio c2f5 14.6 ±0.1 VC 43 1419

c2f+ c6f„cf3 14.4 EVD 2192

(Perfluoromethylcyclohexane)

c3fj

c3f+ c3f6 F 15.18 VC 72 1290

c3f+ c3f6 F 14.8±0.3 LE 64 1067

c3f+ c3f6 F 14.14 VC 1290

(Hexafluorocyclopropane)

c3f+ c4f8 cf3 12.3 ±0.1 VC 46 1290

(Perfluorocyclobutane)

c3f+ c4f8 cf3 12.25 LE 46 1062

(Perfluorocyclobutane)

c3f+ c6f„cf3 13.9 EVD 2192

(Perfluoromethylcyclohexane)

c3f+ cf2 cicf=cf2 Cl 11.22 VC 1290

c4 fj

c4f+ c6f„cf3 14.9 EVD 2192

(Perfluoromethylcyclohexane)

c5 fj

C5F+ CeFe CF 17.2 ±0.2 SL 1132

(Hexafluorobenzene)

C*F+

c6f+ c6f6 F 16.9 ±0.3 SL 1132

(Hexafluorobenzene)

Cfi F+ C6F6 F 16.9±0.1 SL 301

(Hexafluorobenzene)

c6g+ C6F5 COCF3 16.0 SL 308

(Perfluoroacetophenone)

CeF+ C6F5 COCH3 16.7 SL 308

(Pentafluoroacetophenone)

c6f+ c6f5 conh2 16.3±0.3 SL 1168

(Pentafluorobenzamide)

CgFj CeFsCl Cl 15.9±0.1 SL 301

(Chloropentafluorobenzene)

CeFj CeFsBr Br 15.2±0.1 SL 301

(Bromopentafluorobenzene)

150
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c3fj

c3f+ c3f« 11.11 VC -3 1290

C3F+ C3F6 10.3±0.2 LE -21 1067

C3F+ C3Ffi 11.1 VC -3 1123

c3 F+ c3f6 11.3 VC 1290, 1123

(Hexafluorocyclopropane)

c4 f+

c4f+ c6f„cf3 c3f8 ? 13.4 EVD 45 2192

(Perfluoromethylcyclohexane)

c6 fj

CeFjf ChF6 9.97 PI 168

(Hexafluorobenzene)

C6F+ CfiFfi 9.93 ±0.2 SL 1132

(Hexafluorobenzene)

C3F^ C«F6 10.0±0.1 SL 301

(Hexafluorobenzene)

C3F<t CbFs 10.1 =±0.1 SL 1127

(Hexafluorobenzene)

c3 f+

C3F7 n-C3F7 10.06 ±0.1 SL -75 2164

C3F+ 150-C3F7 10.5±0.1 SL -78 2164

c3f7+ c3f8 F 17.1 ±0.1 VC -36 1419

c3f7+ c3 f8 F 16.5 LE -50 1062

C3F+ n-C4Fio cf3 15.0±0.1 VC -46 1419

c4 f+

C4F7+ C6FnCF3 u-C3F7 ? 15.9 EVD -2 2192

(Perfluoromethylcyclohexane)

c5 f+

c5f+ c6f„cf3 C2F5 + F2? 11.9 EVD -189 2192

(Perfluoromethylcyclohexane)

C„F+

CnF+ C 12 F10 17.2±0.1 SL 1127

(Perfluorobiphenyl)

1 C4FJ

c4f+ c6f„cf3 c3 Ffi 11.9 EVD -142 2192

(Perfluoromethylcyclohexane)

c7 fj

c7f+ c6f5cf3 10.4±0.1 SL 301

(Perfluorotoluene)

151
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c12 f

C12FJ C12F10

(Perfluorobiphenyl)

f2 ? 18.4 ±0.3 SL 1127

c5 fj

CsFt C6F„CF3 (Perfluoromethylcyclohexane)

c2f5 13.9 EVD -143 2192

c6fj

CeFj C6F11CF3

(Perfluoromethylcyclohexane)

CF3+F2? 12.9 EVD -264 2192

C12F+ *

C12FJ C12F10

(Perfluorobiphenyl)

F 16.7 + 0.1 SL 1127

CsFJo

CsF+q C5Fio (Perfluorocyclopentane)

C5F+ CbFiiCF3 (Perfluoromethylcyclohexane)C2F4

11.7

15.9

SL

EVD -153

299

2192

C.FJ,

C6F+0 C6F11CF3

(Perfluoromethylcyclohexane)

cf4 12.4 EVD -168 2192

Ci.FJ,

C,2F+0 C12F10

(Perfluorobiphenyl)

10.0±0.1 SL 1127

CeF +

CeF^, C6 FnCF3

(Perfluoromethylcyclohexane)

cf3 13.9 EVD -241 2192

C.7F+

C, 7F+ C ihF 14 (Perfluoro-p-terphenyl)

18.2±0.1 SL 1127

c6f+

C6F CBF12 (Perfluorocyclohexane)13.2 SL 299

Ci 8 F+

2

CiyF+j, C ihF 14 (Perfluoro-p-terphenyl)19.9 SL 1127

152
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

C,F+

CyFjg C6F11CF3 F

(Perfluoromethylcyclohexane)

15.4 EVD -339 2192

CisF+g

(Perfluoro

CisFi4

-p-terphenyl)

CuF&

F 17.5 ± 0.3 SL 1127

C7F+

C7 F+

n-C,F„CF=CF2 10.48 ±0.02 PI 182

Ci8F,+

4 CjgF14 (Perfluoro-p-terphenyl)

Ci8F +

9.85 ±0.3 SL 1127

C24 F C24 F18 (Perfluoro-p-quaterphenyl)

C24F+

9.9±0.1 SL 1127

NF+ Heal of formation 349 kcal mol'-1 NF+ nf2 F- 11.8±0.2 SL 347* 76

NF+ nf2 F 15.5 ± 0.2 SL 349* 76

NF+ nf2 F 15.0 ± 0.2 VC 337 100

NF+ ci5-N2 F2 NF 16.9 ± 0.2 SL 349* 76

NF+ £rarcs-N2 F2 NF 17.0±0.2 SL 355* 76

NF+ nf3 2F 17.9±0.3 SL 345* 401

N2 F+ Heat of formation 32 1 keal mol -1 N2F+ cis-N2F2 F 14.0 ± 0.2 SL 321* 76

n2 f+ ?ran5-N2 F2 F 13.9 ± 0.2 SL 321* 76

NFJ Heat of formation 284 kcal mol 1

NF+ nf2 12.0±0.1 SL 287* 76

NF+ nf2 1 1 . 8 ± 0.2 VC 282* 100

NF+ nf3 F 14.2 ± 0.3 SL 279* 401

NF+ nf3 F 14.4±0.2 SL 283* 76

NF+ nf3 F 14.6 VC 288* 100

m SF5 NF2 SF4 + F? 16.3 ± 0.2 VC (a) 1144

NF+ FS02 NF2 FSO2 14.6±0.3 VC (b) 1144

NF+ FS020NF2 fso3 13.3±0.1 VC (b) 1144

n2f+

n2f+ trans- N2 F2 13.1 ±0.1 SL 322* 76

NFJ

NFJ nf3 13.2±0.2 SL 275* 401, 76

153
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

N2 F+ Heat of formation 339 kcal mol-1

N2 F3+ n2 f4 F- 12.0 SL 340* 76

N2 F+ n2 f4 F 15.6 SL 339* 76

n2 f+

n2 f+ n2 f4 12.04 ± 0.10 SL 276* 74

OF+ 0F+ of2 F 15.8 + 0.2 SL 340 2047

0F+ o2 f2 OF 17.5±0.2 RPD 367 42

(At 130 K)

OF+ of2 F 15.8 + 0.2 RPD 340 42

(At 90 K)

o2 f+ o2 f+ o2 f 12.6 ± 0.2 SL 294 2143

o2 f+ 02 f2 F 14.0 + 0.1 RPD 308 42

(At 130 K)

02 F

+ o2 f2 F 14.0±0.1 SL 308 2143

OF| Heat of formation 309 kcal mol -1

OF+ of2 13.54 + 0.03 RPD 307* 286

OF+ of2 13.7 ± 0.2 SL 311* 2047

CHF+

CHF+ c2 hf3 cf2 15.38 VC 278 419

CHF+ ch2 f2 HF? 17.7 VC 366 1288

CH2 F+ Heat of formation 209 keal mol 1 CH2 F

+ ch2 f 9.35 SL 209* 141

ch2 f+ ch2 f 9.4 SL 210* 141

ch2 f

+ CILF H-? 13.25 + 0.06 RPD 206 1139

ch2 f

+ C1LF H? 13.35 RPD 208 160

ch2 f

+ CHbF H 14.0 RPD 204 160

ch2 f

+ CH3 F H-? 15.15 RPD 160

ch2 f+ CHsF H 15.85 RPD 160

ch2 f+ ch2 f2 F 15.28 VC 227 1288

ch2 f

+ ch2 =cf2 CF 15.08 VC 201 419

ch2 f+ ch3 cf3 15.6±0.2 EVD 1075

ch2 f+ c2 h.3 cf3 15.7±0.3 EVD 1075

ch3 f+

CH3 F

+

(2 E) CFtF 12.85 ±0.01 RPD 229* 289

ch3 f+ ch3 f 12.95 + 0.05 RPD 232 2154

ch3 f+ ch3 f 14.0 ± 0.05 RPD 2154

ch3 f+ CHaF 14.10 + 0.03 RPD 289

ch3 f

+ ch3 f 16.89 ±0.03 RPD 289

CH3 F+ CILF 16.9±0.05 RPD 2154

CH.,F+ CILF 13.4 ± 0.05 RPD 2154

154
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c2 hf+

c2 hf+ c2 h3 f h2 14.04 VC 296 419

c2 hf+ ch,=cf2 HF 14.44 VC 319 419

c2 hf+ c2 hf3 2F 20.0 VC 312 419

c2 h2 f+

c2 h,f+ c2 h3 f H 14.02 VC 243 419

c2 h2 f+ ch2 =cf2 F 14.80 VC 244 419

c2 h2 f+ ch3 cf3 HF + F? 15.8 ±0.2 EVD 234 1075

c2 h3 f+ Heat of formation 211 kcal mol-1

c2 h3f+ c2 h3f 10.37 ±0.02 PI 211* 268

c2 h3f+ c2 h3f 10.37 PI 211* 168

c2 h3f+ c2 h3f 10.45 ±0.05 EVD 213 268

c2 h3f+ c2h3f 10.45 VC 213 419

c2 h3f+ c2 h3f 10.880 PI 268

c2 h3f+ ch3 chf2 HF? 14.8 VC 292 1288

c2 h3f+ ch2=chcf3 13.85 ±0.02 EVD 1075

c2 h4 f+

c2 h4f+ ch3 chf2 F 14.9 VC 325 1288

c3 h2 f+

c3 h2f+ CeHsF 15.77±0.1 SL 2103

(Fluorobenzene)

c3 h4 f+

c3 h4f+ c2 h5 cf3 15.8±0.1 EVD 1075

c4 h3 f+

c4 h3 f+ c6h5f c2 h2 14.77±0.1 SL 260 2103

(Fluorobenzene)

c5 h4 f+

c5 h4f+ c5h4f 8.82 SL 126

(Fluorocyclopentadienyl radical)

c6 h4 f+

c6 h4f+ c6h5f H 15.22 ±0.1 SL 272 2103

(Fluorobenzene)

c6 h4f+ c6 h4 f2 F 15.5±0.1 SL 268 301

(p-Difluorobenzene)

c6 h4f+ c6 h4fci Cl 13.94 EVD 261 1185

(o-Fluorochlorobenzene)

c6h4f+ c6 h4 fci Cl 14.10 EVD 264 1185

(m-Fluorochlorobenzene)

c6 h4f+ c6 h4 fci Cl 14.13 EVD 265 1185

(p-Fluorochlorobenzene)

155
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

cyclo-C6 H5 F+ Heat of formation 186 kcal mol-1

c6h5f+ c6h5f 9.200 s 186* 344

(Fluorobenzene)

c6 h5f+ c6 h5f 9.19±0.01 PI 185* 416

(Fluorobenzene)

c6h5f+ c6 h5f 9. 195 ±0.01 PI * CO O

f-H 182

(Fluorobenzene)

c6h5f+ c6 h5f 9.20 PI 186* 168

(Fluorobenzene)

c6 h5f+ c6 h5 f 9.3±0.1 SL 188 301

(Fluorobenzene)

c7 h6 f+

c7 h6f+ c6 h4 fch2

* 8.18 + 0.06 SL 69

(m-Fluorobenzyl radical)

c7 h6f+ c6 h4fch2 7.78±0.1 SL 69

(p-Fluorcbenzyl radical)

c7 h7 f+

c7 h7f+ c6 h4fch3 8.915±0.01 PI 173* 182

(o-Fluorotoluene)

c7 h7f+ c6 h4fch3 8.915±0.01 PI 172* 182

(m-Fluorotoluene)

c7 h7 f+ c6 h4fch3 9.15 + 0.05 cs 177 2025

(m-Fluorotoluene)

c7 h7f+ c6 h4fch3 8.785 ±0.01 PI 169* 182

(p-Fluorotoluene)

CHFg Heat of formation 143 kcal mol-1

CHF.+ CHF2 9.45 SL (a) 141

CHF+ CH2 F2 H 13. 14 ±0.02 RPD 144* 1139

CHF+ CH2 F2 H 13.1 VC 143* 1288

CHF+ CH3 CHF2 ch3 13.21 VC 157 1288

CHF+ CHF3 F 16.4±0.3 EVD 195 43

CHF+ CHF3 F 15.75 VC 180 1288

CHF.+ C2 HF3 CF 14.22 VC 148 419

CHF.+ CH2=CHCF3 C2 H2 F? 14.9±0.1 EVD 202 1075

CHF+ C2 H5 CF3 c2 h4 +f? 15.9 ±0.1 EVD 144 1075

CHF+ CHF2 C1 Cl 12.59±0.15 EVD 148 43

ch2 f+

ch2 f+ ch2 f2 12.6 VC 184 1288

ch2 f2+ ch2 f2 12.95 TC 192 1164

c2 hf+

c2 hf+ ch2 =cf2 H 16.67 VC 254 419

c2 hf+ c2 hf3 F 16.13 VC 241 419

156
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c2 h2 f+ Heat of formation 159 kcal mol-1

c2 h2 f+ ch2 =cf2 10.30 PI 159* 168

c2 h2 f+ ch2 =cf2 10.31 ±0.02 PI 159* 268

c2 h2 f+ ch2 =cf2 10.32 ±0.05 EVD 159 268

c2 h2 f+ ch2=cf2 10.45 VC 162 419

c2 h2 f+ ch2 =cf2 10.890 PI 268

c2 h2 f+ ch3 chf2 2H? 16.5 VC 162 1288

c2 h2 f+ CFbCF, HF r-H CM +1 © EVD 147 1075

c2 h3 F|

c^f* CFbCHF, H 12.33 VC 118 1288

c2 h3 f2+ CILCF, F 14.9 ± 0.2 EVD 149 1075

c2 h4 f+

C2 H«F+ CFbCHF, 12.68 VC 178 1288

c3 hf+

C3 HF+ ch2 =chcf3 14.8 ± 0.2 EVD 1075

c3 h2 f+

c3 h2 f2+ ch2 =.chcf3 HF? 13.8 ±0.1 EVD 229 1075

c3 h3 f+

c3 h3f2+ ch2 =chcf3 F? 13.3±0.15 EVD 134 1075

c3 h3 f+ c2 h5 cf3 H + HF? 13.6±0.1 EVD 135 1075

c3 h4 f+

c3 h*f+ c2 h5 cf3 HF? 12.53 ±0.04 EVD 163 1075

c3 h5 f+

c3 h5 f+ C2 H5CF3 F 14.9±0.2 EVD 134 1075

c4 h2 f+

c4 h2 f+ ChH4 F2 c2 h2 15.27 EVD 230 1185

(o-Difluorobenzene)

C4 H2 F2+ CkILF, c2 h2 15.30 EVD 227 1185

(m-Difluorobenzene)

C4 H2 F+ ChILF, c2 h. 15.27 EVD 227 1185

(p-Difluorobenzene)

c6 h3 f+

CeHaF* c6 h3f3 F 15.2 ±0.1 SL 301

(1,2,4-Trifluorobenzene)

1 57

323-656 0-69—1
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion OtherReactant products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

C6 H4 F|(o-Difluorobenzene) Heat of formation 147 kcal mol 1 C6 H4 F£ (p-Difluorobenzene) 140 kcal mol-1

c6 h4 f+ CeILF, 9.31 PI 147* 168

(o-Difluorobenzene)

ck h4 f+ CeHiFa 9.74 + 0.02 EVD 157 1185

(o-Difluorobenzene)

c(; h4 f+ ChILF, 9.78 ±0.02 EVD 154 1185

(m-Difluorobenzene)

c6 h4 f; CfilLF, 9.15 PI 140* 168

(p-Difluorobenzene)

CelLFl C6 ILF2 9.66 ±0.02 EVD 152 1185

(p-Difluorobenzene)

C6 ILF2 9.3±0.1 SL 144 301

(p-Difluorobenzene)

C2HFJ Heat of formation 122 keal mol-1

C2 HF3+ c2 hf3 10.14 PI 122 * 168

c2 hf+ c2 hf3 10.33 VC 126 419

c2 h2 f+

c2 h2f+ cf3 ch2 10. 6 ± 0.1 SL 2164

c3 h2 f+

c3 h2f+ ch2 =chcf3 h 12.69 ±0.05 EVD 87 1075

C3 H3 F+

C3 H3 F3+ ch2=chcf3 10.9 PI 97* 168

C3 H3F3+ ch2=chcf3 11.24±0.04 EVD 105 1075

c6 h2 f+

c6 h2f+ c6 h2f4 f 15.9±0.1 SL 301

(1,2,4,5-Tetrafluorobenzene)

c6 h3 f+

c6 h3f+ c6 h3f3 9.37 PI 168

(1,2,4-Trifluorobenzene)

c«h3 f+ c6 h3f3 9.3 PI 168

(1 ,3,5-Trifluorobenzene)

C7 H5 FJ Heat of formation 84 kcal molh1

c7 h5f+ c6 h5 cf3 9.685 s 00tj- * 344

(Benzotrifluoride)

c7 h5f+ C6H5 CF3 9.68 ±0.02 pi CO * 182

(Benzotrifluoride)

c7h5f+ c6 h5 cf3 10.0±0.1 SL 92 301

(Benzotrifluoride)

158
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c7 h„f+

C7 H„F+ C6 HnCF3 10.46 ±0.02 PI 37* 182

(Trifluoromethylcyclohexane)

c6 hf+

c6hf+ c6hf5 F 16.5 + 0.1 SL 301

(Pentafluorobenzene)

c6 h2 f+

c6 h2f+ c6 h2 f4 9.61 PI 168

(1,2,3,4-Tetrafluorobenzene)

c6h2f+ c6 h2 f4 9.55 PI 168

(1 ,2,3,5-Tetrafluorobenzene)

c6h2f+ c6h2f4 9.39 PI 168

(1,2,4,5-Tetrafluorobenzenei

c6 hf+

c6hf+ c6hf5 9.84 PI 168

(Pentafluorobenzene)

c6 hf+ c6 hf5 10.0±0.1 SL 301

(Pentafluorobenzene)

• c7 h3 f+

c7h3f+ c6f5 ch3 9.6±0.1 SL 301

(Pentafluorotoluene)

c6f15 n+

C6F15 N+ (C2Fs)3 N 11.7 PI 182

c7 f5 o+

c7f5 o+ c6f5cocf3 cf3 11.15 SL 308

(Perfluoroacetophenone) c7f5 o+ c6f5 cho H 11.6 SL 308

(Pentafluorobenzaldehyde) c7f5 o+ c6f5 coch3 ch3 11.25 SL 308

(Pentafluoroacetophenone)

c7f5 o+ c6f5 conh2 nh2 ? 11.3±0.2 SL 1168

(Pentafluorobenzamide)

C8 FhO+

c8f8 o+ c6f5cocf3 11.05 SL 308

(Perfluoroacetophenone)

ch2 bf+ ch2 bf+ ch3 bf2 HF? 13.38 ±0.02 SL 179 1076

ch3 bf+

ch3 bf+ ch3 bf2 F 15.05±0.1 SL 134 1076

159
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c2 h2 bf+

c2 h2 bf+ ch2 =chbf2 H + F-? 12.69 ±0.05 SL 115 1076

c>h2 bf+ G2 H5 BF2 hf+h2 12 . 0 ± 0.2 SL 128 1076

c2 h2 bf+ c2 h5 bf2 15.0±0.2 SL 1076

c2 h3 bf+

c,h3 bf+ ch2=chbf2 F-? 11.9±0.2 SL 149 1076

c2 h3 bf+ ch2=chbf. F 15.5 + 0.2 SL 149 1076

c,h3 bf+ C2 H5 BF2 H. + F-? 12 . 0 ± 0.2 SL 127 1076

C.H3BF+ c2 h5 bf2 HF+H 14.9 + 0.2 SL 142 1076

c2 h3 bf+ i50-C3 H7 BF2 ch4 + f-? 11 . 8 ± 0.1 SL 136 1076

c2 h4 bf+

C.H4 BF+ C2 H5 BF2 HF 12.6 + 0.2 SL 141 1076

c2 h5 bf+

c,h5 bf+ c2 h5 bf2 F-? 12 . 1 + 0.2 SL 130 1076

c2 h5 bf+ c2 h.5 bf2 F 15.6±0.2 SL 127 1076

CH3BF+

ch3 bf+ CHaBF, 12.54 + 0.03 SL 95 1076

c2 h3 bf+

QH3BF+ ch2 =chbf2 11.06 ±0.03 SL 65 1076

c2 h3bf+ /so-C3 H7 BF2 ch4 12.80±0.05 SL 94 1076

c2 h4 bf+

c2 h4 bf+ i5o-C3 H7 BF2 ch3 12.58 ±0.05 SL 38 1076

c2 h5 bf+

c2 h5 bf+ c2 h5 bf2 11.8±0.05 SL 58 1076

c8 h10nf+ ChH1 ( ,NF+ Ch H4 FN(CH3 )2 7.50 CTS 150 1281

(A\ A-Dimethyl-p-Fluoroaniline)

c6 h5 of+

Cfi H.->0F+ c6 h4 foh 8.66 ± 0.01 PI 132* 182

(o-Fluorophenol)

c7 h5 of+

c7 hs of+ CkH-.COF 10.6 SL 190 308

(Benzoyl fluoride)

c8 h5 of+

C8H5OF+ CeHsCOCFi 10.25 SL 308

(Trifluoroacetophenone)

160
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

c8 h3 of+

C8 H3 OF+ c6 f5 coch3 11.25 SL 308

(Pentafluoroacetophenone)

C5 H3 OF+

C5 H3 OF+ n-C3 F7 COCH3 10.58 ±0.03 PI 182

C7 H2 NOF+

C7 H2 NOF+ c«f5 conh2 10 . 0 ± 0.1 SL 1168

(Pentafluorobenzamide)

C19 H10N4 O2 F£

C 19 H10 N4 O2 F+ (C6 H5 C2 N2 0>2 C3F« 9.5±0.1 SL 2156

(l,3-Di-(2-Phenyl-l,3,4-oxadiazol-5-Yl)perfluoropropane)

c„h5 n2 of+

cu h5 n2 of7+ C6 H5 C2 N2 OC3 F7 9.8±0.2 SL 2156

(2-Phenyl-5-perfluoropropyl-l,3,4-oxadiazole)

C15 H5 N2 OF1+

5

C, 5 H5 N2 OF+ Ck H5 C2 N2 C7 F15 9.9±0.1 SL 2156

(2-Phenyl-5-perfluoroheptyl-l,3,4-oxadiazole)

Na+ Heal of formation 144 kcal mol L

Na+ Na 5.139 s 144* 2113

Na+ Na 5.14 LE 144 99

Na+ Nal I 8.7 ±0.3 VC 2001

Na+2 Heat of formation 1235 kcal mol-1

Na+2 Na 52.44 S 1235* 2113

Na+2 Na 52 ±1 NRE 1225 99

Na+3 Heat of formation 2888 kcal mol-1

Na+3 Na 124.11 S 2888* 2113

Na+3 Na 125 ±2 NRE 2908 99

Na+

Na+ Na2 4.90 ±0.01 PI 146* 1189

Mg+ Heat of formation 212 kcal mol- 1 Mg+ Mg 7.646 S 212 * 2113

Mg+ Mg 7.6±0.2 VC 211 1104

Mg+ MgCl2 2C1 17.5±0.5 VC 250 178

Mg+ MgBr2 2Br 15.5 ± 1 VC 229 178

161
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

MgF+ MgF

MgF+

7.8 + 0.3 VC 127 1104

MgF+ MgF 7.8 ± 0.3 VC 127 2148

MgF+ MgF2 F 13.5±0.4 VC 119 178

MgF+ MgF2 F 13.7 ± 0.4 VC 124 1104

MgF+ MgF2 MgF+

13.5±0.4 VC 138 178

Mg,F+ Mg2 F4 Mg,F+

F? 14.0 + 0.5 VC -108 178

A1+ A1

Al+ Heat of formation 216 kcal mol

5.986

1

s 216* 2113

A1+ A1 5.986 s 216* 2199

A1+ A1 6.0±0.5 LE 216 2128

A1+ A1 6.0±0.3 VC 216 1104

A1+ A1 6.1 ±0.3 VC 219 2165

A1+ A1F F? 9.2 ±0.3 VC 215 2148

A10+ A10

A10+

9.5 ± 0.5 LE 241 2128

A12 0+ A1,0

ai2 o+

7.7 ± 0.5 LE 147 2128

ai2 o+ A12 02

ai2 o+

9.9 ±0.5 LE 134 2128

A1F+ A1F

A1F+ Heat of formation 166 kcal mol

8.9±0.6

-1VC 144 2142

A1F+ A1F 9.7 ±0.5 VC 162* 1104

A1F+ A1F 9.7±0.3 VC 162* 2148

A1F+ A1F 9.9±0.3 VC 167* 1104

A1F+ A1F 10.1 ±0.3 VC 171* 1104

A1F+ A1F2

A1FJ

9± 1 VC 58 2148

A1F+ A1F3 F? 15.2 ±0.3 VC 44 1104

A1F+ A1F3 F? 15.2 ±0.3 VC 44 2148

Si+ Si

Si+ Heat of formation 297 kcal mol'

8.151

-1

s 297* 2113

Si + Si 8.1 LE 296 1116

Si + SiH4 2H2 1 1.7 ± 0.2 LE 278 2116

Si + SiH4 H2 + 2H 16.4 ± 0.2 LE 282 2116

Si + SiH4 4H 20.8 ±0.2 LE 280 2116

Si+ (CH3 )3 SiH CH4 + C2 H6 ? 13.7±0.3 EVD 312 83

Si + Si2 H6 Si + 3H2 15.2 ±0.3 LE 261 2133

162
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

Si+

Si \ Si2 7.3 LE 310 1116

Si+ Si2 7.4±0.3 LE 313 333

Si+ Si2 H6 3H2 12.2 ±0.3 LE 301 2133

SiJ

Si+ Si3 8.0±0.3 LE 332 333

SiH+

SiH+ SiH4 h2 +h 16.1 ±0.2 LE 327 2116

SiH+ SiH4 3H 20.4 ± 0.5 LE 322 2116

SiH+ (CH3 )3 SiH 14.2 ± 0.2 EVD 83

SiHj

SiH- SiH4 h2 11.91 ± 0.02 SL 283 2182

SiH+ SiH4 h2 12.1 ±0.2 LE 287 2116

SiH+ SiH4 2H 16.5±0.3 LE 285 2116

SiH- CH3 SiH3 ch4 11.62 ±0.1 SL 2182

SiH+ C2 H5 SiH3 c2 h6 12.0 ± 0.

SL 265 2182

SiHj Si2 H6 SiH4 11.94 ±0.04 SL 286 2183

SiHj

SiH- SiH4 H 12.40 ±0.02 SL 242 2182

SiH- SiH4 H 1 1 .8 ± 0.2 LE 228 173

SiHj SiH4 H 11.8±0.2 LE 228 2116

SiH+ SiH4 H 11.81 ±0.09 LE 229 2002

SiH- CH3 SiH3 ch3 12.80±0.1 SL 2182

SiH- C2 H5 SiH3 c2 h5 12.8±0.2 SL 238 2182

SiHi5o-C3 H7SiH3 iso-C3H7 13.1 ±0.2 SL 247 2182

SiH- (CH3 )3 SiH 14.3 ± 0.5 EVD 83

SiH- £ert-C 4 H9 SiH3 tert- C4 H9 13.7±0.2 SL 2182

SiH- Si2 H6 SiH3 11.85 ±0.05 SL 2183

SiH- Si2 H6 SiH3 11.31 ±0.12 LE 2002

SiH- Si2 H6 SiH3 11.3 ± 0.2 LE 173

SiH- SiPH5 ph2 1 1 .5 ± 0.2 LE 173

SiH- GeSiHe GeH3 12.01 ±0.09 LE 266 2002

Si2 H+

Si2 H+ Si2 H6 10.6±0.3 LE 264 2133

SiB +

SiB- SiB 7.8 LE 355 1116

SiC+

SiC- SiC 9.0 LE 385 1116

SiC- SiC 9.2 ±0.4 LE 389 333

163
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

SiCj

SiC+ SiC2 10.2 ± 0.3 LE 382 333

SiC+ SiC2 10.2 LE 382 1116

Si2 C+

Si2 C

+ Si2 C 9.1 LE 342 1116

Si2 C+ Si2 C 9.2 ±0.3 LE 344 333

Si2 C+

Si2 C+ Si2 C2 8.2±0.3 LE 357 333

Si2 C£

Si2 C+ Si2 C3 9.2±0.3 LE 389 333

Si3 C+

Si3 C

+ Si3 C 8.2 ±0.3 LE 351 333

SiO+

SiO+ SiO 10.51 S 219 2150

SiF+

SiF+ SiF 7.26 S 168 2149

SiF+

SiF+ SiF4 15.4±0.4 SL -31 74

CHSi+

CHSi+ (CHa),SiH 11.7 ± 0.5 EVD 83

CH2 Si+ CH2 Si+ (CH3 )3 SiH 10.6±0.3 EVD 83

CH3 Si+

CH3 Si + (CHahSiH 12.4±0.3 EVD 83

CH3 Si + (CHahSi 17.1 ±0.4 EVD 82

CH4 Si+

CH4Si+ (CH3 )aSiH 11.0±0.3 EVD 83

CH5 Si+ CH5 Si+ (CHafeSiH 12.8±0.5 EVD 83

C2 H6 Si+

C2 Hfi Si+ (CHalaSiH CH, 10.3±0.2 EVD 213 83

C2 HfiSi + (CHa)4 Si 2CH3 13.9±0.3 EVD 197 82

164
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C2 H7 Si+

C,H7 Si+ (CH3 )2 SiH2 H 11. 94 ±0.04 RPD 1421

C,H-Si+ (CH3 )sSiH CHa 11.70 ± 0.06 RPD 195 1421

C2 H7 Si+ (CHahSiH CHa 11.9 ± 0.3 EVD 199 83

C2 H8 Si+

C2 H«Si+ C2 H5 SiH3 10.18 ±0.05 SL 203 2182

C3 H9 Si+ Heat of formation 155 kcal mol-1

C3 II9 Si+ (CH3 )3 SiH H 10.78 ±0.07 RPD (a) 1421

C3 H9 Si + (CHa^SiH H 10.9 ± 0.2 EVD 83

C3 H9 Si+ (CH3)3 SiH H 10.72±0.1 NS 2055

C3H9Si+ (CH3)4 Si CHa 10.63±0.13 RPD 155* 1421

C3 H9 Si+ (CH3 )4 Si CHa 11.3 ± 0.15 EVD 170 82

C3 H9 Si+ (CH3 )4 Si CHs 10.53 ±0.1 NS 152 2055

C3 H9 Si+ (CH3 )aSiC2 H,-, c,h5 10.53 ±0.09 RPD (a) 1421

C3 H9 Si+ (CH3 )3 SiC2 H5 c2 h5 10.34±0.11 NS 2055

C3 H9 Si+ is o - Ca H7 Si ( CH.j ) 3 iso-C3 H7 10.56 ± 0.16 RPD (a) 1421

C3 H9 Si + tert-C4 H9 Si(CH3 )a tert-C4 H9 10.53 ±0.09 RPD (a) 1421

C3 H9 Si+ C6 H5 CH2 Si(CHa)3 c«h5 ch2 10.05 ±0.1 NS 2055

(Benzyltrimethylsilane)

C3 H9Si+ (CH3 )3 SiSi(CH3 )3 Si((JH3 )3 10.69 ±0.04 RPD 1421

C3 H9 Si+ (CH3 )3 SiSi(CH3 )3 Si(CH3 ) 3 10.03 ±0.1 NS 2055

C3 H9 Si+ (CH3 )3 SiN(C2 H5 >2 N(C2 H5 )2 12.61 ±0.03 RPD (a) 1421

C3 H9 Si+ (CH^SiOCHa OCHa 12.43 ± 0.18 RPD (a) 1421

C3 H9 Si+ ( CH3 )3 SiOSi( CH3 )3 OSi(CH3 )a 15.36±0.13 RPD (b) 1421

C3 H9 Si+ (CHa)aSiF F-? 11.7 ± 0.5 RPD 1421

C3 H9 Si+ (CHa)aSiCl Cl 12.40 ±0.06 RPD 173 1421

C3 H9 Si+ (CH3 )aSiCl Cl 11.5 ± 0.2 NS 152 2055

C3 H9Si+ (CHafeSiBr Br 10.69 ±0.06 RPD (a) 1421

C3 H9 Si+ (CHa)aSiHgSi(CH3 )a 8.56 ±0.1 NS 2055

C3 HioSi+

C3 H10 Si+ t50-C3 H7 SiHa 9.85 ±0.1 SL 189 2182

C3 H,oSi+ (CH3 )aSiH 9.8±0.3 EVD 184 83

C4 H„Si+

C4 H„Si+ (CHalaSiCaHs CHa 11.41 ±0.06 RPD 167 1421

(CH3)4 Si+ Heat of formation 171 kcal mol-1

C4 H, 2 Si+ tert-C4 H9 SiH3 9.5 ±0.2 SL 2182

C4 H) 2 Si+ (CHaliSi 9.98 ±0.03 RPD 173* 1421

C4 Hi 2 Si+ (CH3 )4 Si 9.8 EC 169 218

C4 H12 Si+

( CH3 X* Si 9.8±0.15 EVD 169* 82

C5 H14 Si+ C5 H14 Si+ (CHa)aSiC2 H.5 9.70 ±0.01 RPD 161 1421

C6 H16 Si+ C6 Hi 6 Si+ tso-C3 H7 Si(CHa )3 9.50 ±0.03 RPD 147 1421

C7 Hi8 Si+ C7 Hi 8 Si+ terf-C4 H9 Si(CH3 )a 9.34 ±0.06 RPD 132 1421

165
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

CsHi5 Si^

C5 Hi 5 Si+ (CFDsSiS^ClFsfe CH, 10.74±0.08 RPD 89 1421

CeHisSi^

C6 H18 Si+ (CHs^SiSUCHsJs 8.79 ±0.08 RPD 77 1421

BCSi+

BCSi+ BCSi 9.9 LE 394 1116

C7H19SiN+

C7 H19 SiN+ (CHafeSi^QHs). 8.06 ±0.02 RPD 88 1421

C3 H9SiO+

C3 H9 SiO+ (OUSiOCH, ch3 10.25 ±0.05 RPD 71 1421

C4 H12 SiO+ C4 H12 SiO+ (CHsfeSiOCH.! 9.79 ±0.04 RPD 94 1421

C5 H15 Si2 0+

C5 Hi 5 Si2 0+ (CH3 )3 SiOSi(CH3 )3 ch3 10.20±0.07 RPD 16 1421

CeHi8Si2 0+ C6 Hi 8 Si2 0+ (CHaJsSiOSKCHaii 9.59 ±0.04 RPD 35 1421

C2 H6 SiF+ C2 H6 SiF+ (CH.feSiF CH, 11.11 ±0.05 RPD 1421

C3 H9 SiF+

C3 H9 SiF+ (ClUSiF 10.55 ±0.06 RPD 1421

P+ Heat of formation 328 kcal mol l

P+ P 10.980 S 328* 2113

P+ P 11 VC 329 8

P+ P2 P 16 VC 328 8

P+ p2 H4 P

4- 2 H2 ? 16.7 ±0.3 LE 315 2133

P+ p4 P3 ? 14 VC 8

P+ p4 P+ P2 ? 18 VC 319 8

P+ p4 20 VC 8

P+ p4 3P? 23.5 VC 330 8

P+ p4 26.5 VC 8

P+ ph3 h2 +h 1 6.0 ± 1 VC 318 1036

P+ ph3 h2 + h 17.2±0.2 EVD 346 1033

P+ ph3 h2 +h 16.5± 0.2 LE 330 2116

P+ ph3 20 ± 1 LE 1036

P+ ph3 3H 20.8±0.3 LE 325 2116

P+ (CH3 >2 PH 11.9 LE 1036

P+ PCl3 3C1 21.2±0.5 EVD 333 192

P+ PCl3 3C1 21.0± 0.5 NS 328 1101

P+ POCla 21.4 NS 1101

166
TABLE 1 . Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

P+2 Heat of formation 782 kcal mol 1

p+2 P 30.637 S 782* 2113

p+2 P+ 17.5 VC 8

p+2 P4 P2 + P? 38 VC 781 8

p+2 P4 2P+P+? 55 VC 8

p+2 ph3 3H 42 ±2 LE 814 1036

p+2 ph3 3H 42 ± 2 NRE 814 1036

1P+2 P+ 1

2 P2 10 VC 8

(Excited parent molecule)

P2+ P2 12 VC 311 8

P+ 1

2 P2 13 VC 8

P+1

2 P4 P2 14.3 VC 309 8

P+ 1

2 P4 15.5 VC 8

P+1

2 P2 IL 2H2 12.2 EC 286 1033

1P+2 p2 h4 2H2 13.7±0.3 LE 321 2133

P+1

2 P2C14 CI2 + 2CI? 19.7 ± 0.4 EVD 290 192

rP+3 P+3 p3 11.5 VC 8

P+1 3 p3 13.2 VC 8

P+1

3 p4 P 14.5 VC 273 8

P3+ p4 P 17.5 VC 8

P+r 4 P4+ p4 9 VC 222 8

pr p4 10 VC 8

p4+ p4 11.5 VC 8

p4+ p4 12 VC 8

p4+ p4 12.5 VC 8

p4+ p4 13.7 VC 8

p4+ p4 14.2 VC 8

PH+

PH+ ph3 h2 13.3 ± 0.2 EVD 308 1033

PH+ ph3 h2 13.1 ±0.2 VC 303 1036

PH+ ph3 h2 12.4 ± 0.2 LE 287 2116

PH+ ph3 h2 13.6 LE 315 1036

PH+ ph3 2H 16. 4± 0.4 LE 275 2116

PH 2 PH+2 ph3 2H? 25.1 NRE 476 1036

PH+2 ph3 2H? 21.2 LE 386 1036

PH+

PH+ ph3 H 13.2 ± 0.2 EVD 254 1033

PH+ ph3 H 14.0±0.2 VC 272 1036

PH+ ph3 H 13.2 ±0.2 LE 254 173

m ph3 H 13.4±0.2 LE 258 2116

PH+ pr3 H 14.4 LE 281 1036

PH+ p2 h4 ph2 12.5±0.2 LE 263 173

PH+ SiPH5 SiH,3 13.1 ±0.2 LE 173

167
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

PH1+

PH+2 PHa H 34.0 NRE 733 1036

PH+2 ph3 H 32.7 LE 703 1036

PH^ Heat of formation 231 kcal mol 1

PH+ ph3 9.98 PI 231* 1091 PH.+ ph3 10.2 ±0.2 EVD 237 1033

ph3+ ph3 10.4±0.3 SL 241 1407

PHJ ph3 10.4 ±0.3 VC 241 1036

PH+ ph3 10.3 ±0.5 LE 239 1036

ph3+ ph3 11.5±0.3 LE 267 2116

PH+ ph3 10.3 EC 239 218

ph3+ c2 h5 ph2 c2 h4 11.2 ± 0.2 EVD 234 2045

ph3+ (C2 h5 )3 p 3C2 H4 ? 14.7 ±0.2 EVD 264 2045

ph2 d+ ph2 d+ ph2 d 10.1 ±0.2 EVD 1033

PHD+

PHD+ phd2 10.2 ±0.2 EVD 1033

PDJ

PD3 pd3 10.1 ±0.2 EVD 1033

PHJ2 ph3+2 ph3 15.6 NRE 361 1036

ph3

2 ph3 15.0 LE 347 1036

PHj Heat of formation 174 kcal mol- 1

PH+ D 174* 1414

PH+ (CH3 )3 P 14.2 ±0.2 EVD 2045

PH+ (C2 h5 ) 3 p 14.7±0.3 EVD 2045

p2 h+

P>H+ P2H4 h2 + h 13.6±0.3 LE 267 2133

P>H+ P2H4 h2 + h 13.2 EC 257 1033

p2 h^

P>H+ P2 H4 h2 12.7±0.3 LE 298 2133

P>H+ P2 H4 H, 10.5 EC 247 1033

PMl

P2 H3+ p,h4 H 11.3±0.3 LE 214 2133

P2H3 p2 h3 8.9 EC 1033

P2 H3+ P2H3 9.1 EC 1033
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

p2 hj

p2H+ p2 h4 10.6 ± 0.3 LE 249 2133

p2 h+ P2 H4 8.7 ±0.3 EC 206 1033

P2H3D

P-H3 D+ P2 H3 D 8.4±0.3 EC 1033

p2H2D2

P2H2 D+ p2 h2 d2 8.2±0.5 EC 1033

PC+

PC+ ch3 ph2 2H2 + H 14.5 ± 0.3 EVD 275 2045

PC+ c2 h5 ph2 CH3 + 2H2 ? 12.0±0.3 EVD 232 2045

PC+ (CH3 )3 p 13.2 + 0.3 EVD 2045

PC+ (C2 H5)3 P 19.1 ±0.5 EVD 2045

PO+

P0+ (CH3 0)2 PH0 16.3 LE 1036

P0+ poci, C12 + C1-? 14.5 ± 0.5 NS 260 1101

POJ

P03+ (CH30)2 PH0 13.5 LE 1036

PF3 PF3 pf3 9.71 PI 4* 1091

A1P+

A1P+ A1P 8.4 ± 0.4 LE 297 2152

CHP+

CHP+ CH3 PH- 2H2 14.7 ±0.3 EVD 332 2045

CHP+ c2 h5 ph2 CH4 + H.? 13.1 ±0.5 EVD 308 2045

CHP+ (CH3)2 PH CH4 + H2 ? 14.1 LE 328 1036

CHP+ (CH3)3p 2CH3 + H2 ? 18.4±0.2 EVD 335 2045

ch2 p

CH2 P+ CH3 PH- H, + H 14.7 + 0.2 EVD 280 2045

ch2 p+ c2 h5 ph2 ch3 +h2 ? 12.7 ±0.4 EVD 248 2045

ch2 p+ (CH3)3 P 16.1 ±0.4 EVD - 2045

ch2 p+ (CH3 )3 P 17 ± 1 VC 1036

ch3 p+

CH{P+ c2h5ph2 ch4 ? 12 . 0 ± 0.2 EVD 283 2045

ch3 p+ (CH3 ) 2 PH CH4 ? 11.9 LE 277 1036

ch3 p+ (CH3)3 P c2 h4 + h2 ? 14.0±0.3 EVD 287 2045

ch3 p+ (C2 h5)3p 17.9±0.5 EVD 2045

ch3 p+ ch3 ph2 h2 12.2 ± 0.2 EVD 274 2045

169
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

ch4p+ CH4 P+ ch3 ph2 H 11.6 ± 0.12 EVD 208 2045

ch4 p+ c2 h5ph2 ch3 12.2±0.2 EVD 236 2045

ch4 p+ (CH3 ) 3 p 14.7±0.2 EVD 2045

ch4 p+ (C 2 h5 )3 p 15.8±0.2 EVD 2045

ch5 p+ ch5p+ ch3 ph2 9.72±0.15 EVD 217* 2045

c2 h2 p+

c2 h2 p + c2 h5 ph2 2H> + H 15.8±0.3 EVD 300 2045

c2 h.p+ (CH3 )3 P CH3 + 2H2 ? 16.7 + 0.2 EVD 329 2045

c2 h2 p+ (C2 H5 )3P 16.5±0.3 EVD 2045

c2 h,p+

c2 h3 p+ c>h5 ph> 2H» 12.9 ± 0.4 EVD 286 2045

c2 h3 p+ (C2 H5)3P 16.7 ±0.2 EVD 2045

c2 h4p+

c2 h4 p+ c2 h5 ph2 h2 + h 12.9±0.3 EVD 233 2045

c,h4 p + (CH3 )3 P ch3 +h-? 14.0±0.2 EVD 266 2045

c.h4 p+ (CH3 )3 P ch3 + h2 ? 15± 1 VC 290 1036

c2 h4 p+ (C2 H5)3P 2C2 H5 + H? 16.0±0.2 EVD 229 2045

c2 h5 p+

c2h5 p+ c2 h5 ph2 h2 12.0±0.2 EVD 265 2045

c2 h5 p+ (C2 H5 )3 P 13.4±0.5 EVD 2045

C2 H6 P+ Heat of formation 214 kcal mol-1

c2 h«p+ c2 h5 ph2 H 12.0±0.3 EVD 213* 2045

C2 HhP+ (CH3 ) 2 PH H 12.2 LE 214 1036

c2 h6 p+ (CH3 )3 P ch3 11.7±0.2 EVD 213* 2045

c2 h6p + (CH3 ) 3 p ch3 11.8±0.2 VC 216* 1036

c2 h«p+ (C2H5 )3P 14.0±0.2 EVD 2045

c2 h7p+

c2 h7 p+ c2 h3 ph2 9.47 ±0.5 EVD 206 2045

c2 h7 p+ (CH3 ),PH 9.7 LE 209 1036

c2 h7 p+ (C2 H5 )3P 2C2 H4 ? 12.7 + 0.2 EVD 230 2045

c3 h8 p+

C3 Hh P + (CH3 )3 p H 10.2±0.5 EVD 160 2045

c3 h*p+ (CH3)3 P H 1 1 .8 ± 0.2 VC 197 1036

c3 h«p+ (C2 H5)3 P 13.8 + 0.5 EVD 2045

c3 h9p+

c3 h9 p + (CH3 ) 3 P 8.60 + 0.2 EVD 175 2045

c3 h9 p+ (CH3 )3 P 9.2±0.5 VC 189 1036

170
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c4 h10 p

c4 h10p + (C2 H5)3P c2 h5 11.4±0.3 EVD 200 2045

C4 HnP

C4 HnP + (C2 h5 )3 p c2 h4 10.7±0.3 EVD 196 2045

c5 h12 p+

c5 p12 p + (C2 H5)3P ch3 12 . 0 ± 0.2 EVD 206 2045

c«h15 p+

c6 h, 5 p + (C2 h5 ) 3 p 8.27 ±0.24 EVD 153 2045

CisHx P+

c 18 h15 p+ (C6H5)3P 7.36 ±0.05 PI 242* 1140

(Triphenylphosphine)

HPOJ

HP03+ (CH3 0)2 PH0 2CH3 ? 11.2 LE 1036

C:,F9P+

c3f9 p+ (CF3)3 P 11.3 ±0.1 EVD 1007

SiPH^

SiPH+ SiPHs 10.0 ± 0.2 LE 173

CH4 PO^

CH4 PO3+ (CH3 0)2 PH0 ch3 ? 11.9 LE 1036

c2 h6 po+

c2 h6 po3+ (CH3 0)2 PH0 H 12.7 LE 1036

C2 H7 PO^

c2 h7 po3+ (CH30)2PH0 10.5 LE 1036

S

+ Heat of formation 306 kcal moi-1

s

+ s 10.360 S 306* 2113

S+(2 D) so2 o2 17.5±0.3 SL 333 418

S

+

( 2 D) so2 20 22.6 ± 0.2 SL 331 418

S

+ c2 h4 s c2 h4 13.1 ±0.2 EVD 301 51

(Ethylene sulfide)

S + SnS Sn 16.5 ±2.0 LE 337 2139 s+ PbS Pb 16.0 ± 2.0 LE 354 2139

171
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

s+

S2+- S2 9.6±0.5 LE 252 2139 s+ •S2 9.7 ±0.1 LE 254 2022

S2+ s2 9.7 ±0.1 NS 254 2172 s+ s. 10.0±0.3 NS 261 319

S2+ s2 10.3 + 0.2 NS 268 319 s+ s6 2S2 ? 12 . 8 ± 1.0 EVD 258 1035

S2+ CH3 SSCH3 2CH3 15.4 + 0.3 EVD 283 176 s2+ c2h5 ssc2 h5 2C2 H5 14.9 + 0.4 EVD 276 186 s+ CH3 SSSCH3 CH3 S + CH3 ? 14.4 ±0.3 EVD 267 84

sj

°3s+ s6 13.3 ±0.5 EVD 1035

S3+ s8 12.6 ±0.5 EVD 1035

St

s4+ s4 10.4 ±0.5 NS 273 2172 s4+ s6 S2 10.9 ±0.3 EVD 245 1035 s4+ s6 s2 11.05 ±0.3 EVD 249 1035 s4+ s8 12.5±0.3 EVD 1035

st

S5+ s8 10.2 ±0.3 EVD 1035

s+

s+ s6 9.7 ±0.3 EVD 248 1035 s+ s6 9.81 ±0.3 EVD 251 1035 s+ s6 8.5 ±0.3 NS 221 2172

S 6 s8 s2 10.1 ±0.3 EVD 227 1035

St

s 7+ s7 9.1 ±0.3 EVD 1035

S 7+ s7 9.3±0.3 EVD 1035

SJ

°s+8 s8 9.6±0.2 EVD 246 1035

°8s+ s8 7.3±0.3 NS 193 2172

HS+ Heat of formation 276 kcal mol 1

HS+ HS 10.50±0.1 SL 276* 120

HS + h2 s H 14.43 ±0.1 SL 276* 120

HS + CH3 SCD3 c2 h2 d3 11.9 SL 307

172
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal moL 1 ) h2 s

+ Heat of formation 235 kcal mol -1 H2 S

+ H2 S 10.414 ±0.002 s 235* 387

h2 s

+ h2 s 10.425 ±0.003 s 235* 387

H,S+ H>S 10.46 ±0.01 PI 236 182,

416, 1103

H,S + H2 S 10.45 ±0.03 RPD 236 463

H2 S

+ h2 s 12.46 ±0.03 RPD 463

h2 s+ h2 s 14.18^0.04 RPD 463

h2 s+ h2 s 16.07 ±0.05 RPD 463

h2 s+ c2 h4 s c2 h2 13.4±0.1 EVD 275 51

(Ethylene sulfide)

H2 S + H,S 10.42 PE 235 1130

h2 s+ H2 S 12.62 PE 1130

h2 s

+ h2 s 14.82 PE 1130

h2 s+ h2 s 18.00? PE 1130

h2 s+ h2 s 20.12 PE 1130

h3 s

+ H3 S

+ ch3 sch3 c2 h2 +h? 14.8 ±0.2 EVD 226 84

H,S + ch3 sch3 C>H, + H? 13.85 SL 204 307

H3 S

+ ch3 sc2 h5 c,h2 +ch3 ? 15.1 ± 0.2 EVD 247 176

h3 s+ ch3 sch>ch==ch2 14.8±0.2 EVD 186

H3 S

+ n-C3 H7 SCH3 15.6±0.3 EVD 176

H:i S + c2 h5 sc2 h5 15.6 ± 0.4 EVD 84

h3 s+ c2 h.,ssc2 h5 15.3±0.2 EVD 186

h2 ds+ h2 ds+ ch3 scd3 c2 d2 + h? 12.8 SL 307

hd2 s

+ hd2 s

+ CH3SCD3 c2 h2 + d? 13.9 SL 307

d3 s

+

D3 S + CH3SCD3 c2 h2 +h? 14.8 SL 307

h2 s^

h2 s+ h2 s2 10.54 CS 246 383

h2 s.+ h2 s2 9.90 TC 231 191

h2 s+ h2 s2 10.09 TC 235 191

h2 s+ c2 h3 ssc2 h5 2C2 H4 12.2 ± 0.2 EVD 239 186, 191

h2 s+ c2 h5 ssc2 h5 2C>H4 11.9 SL 232 307

CS+

CS + cs 11.8 ± 0.2 NS 328 319

CS + cs 11.9±0.3 NS 330 319

CS + ch3 ncs ch3 n? 15.6 ± 0.4 SL 315

cs + c2 h5 ncs c2 h5 n? 16.1 ±0.5 SL 315

173
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

CSj(2 n3/2.9) Heat of formation 261 kcal mol"1 csi(2 n1/2g) 262 kcal mol-1

csi(2 nM ) 318 kcal mol"1 csjesj) 362 kcal mol"1 CS+fSj) 401 kcal mol"1

cs+(2 n3/2g ) cs2 10.080 S 261* 149

cs+(2n3/29) cs2 10.07 ±0.01 S 260* 410

cs+(2 n1/29 ) cs2 10.134 s 262* 149

cs2+

( 2 n1/29) cs2 10.13±0.01 s 262* 410

cs+(2 n9) cs2 10.08 ±0.01 PI 261 416

cs2+( 2 n9) cs2 10.06 PE 260 92

cs+(2 n9) cs2

- 10.07 PE 260 1130

CS + cs2 10.15 ±0.05 RPD 262 164, 169

cs+ cs2 12.01 ±0.09 RPD 164, 169

cs+cro cs2 12.57 PE 318* 92

cs+(2 n„) cs2 12.62 PE 319* 1130

CS + cs. 13.60±0.19 RPD 164, 169

CS2+

( 2 S+) cs2 14.476 S 362* 149

CS+(22+) cs. 14.47 ±0.01 S 362* 410

CS+(22+) cs2 14.46 PE 362 92

cs}<?%+) cs2 14.52 PE 363 1130

CS+ cs2 14.76 ±0.25 RPD 164, 169

CS+(2 2g+) cs. 16.19 S 401* 149

CS+(22g+) cs2 16.19±0.01 s 401* 410

CS+(2 2g+) cs. 16.02 PE 397 92

CS+(2 Xg+

) cs. 16.17 PE 401 1130

cs,+ cs2 15.90±0.12 RPD 395 164, 169

CS+ cs2 16.64 PE 92

CS+ cs. 16.82 PE 1130

cs+ cs2 18. 10 ±0.36 RPD 164, 169

CS+ cs. 18.42 PE 1130

CS + cs. 19.05 PE 92

cs2+ cs. 19.31? PE 1130

cs2+ cs2 19.513 S 149

cs+ cs. 19.51 ±0.05 S 410

csr2

CS+2 cs2 27.45 ±0.2 NRE 661 1040

CS£3

cs2+* cs. 53.6 ±0.5 NRE 1264 1040

NS+ NS + ch3 ncs c,h3 ? 12.5 ±0.2 SL 255 315

174
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -

*) so+

SO- so. 0 16.2 ± 0.2 SL 243 418

SO- SO, 0 16.5 ±0.2 LE 250 2022,2172

SO- S2 0 s 14.5 ±0.2 LE 2022, 2172

SO- so2 f. 0 + 2F 24.3 ±0.3 SL 258 418

SOj Heat of formation 214 kcal mol- l

SO- so. 12.34 ±0.02 PI 214* 416

so- so. 12.44 ±0.1. SL 216 418

SO- so. 12.5 ±0.2 LE 217 2022,2172

so- so. 12.7 ±0.2 LE 222 2022,2172

so- SO,F, 2F 19.9 ±0.3 SL (a) 418

so- so. 12.32 PE 213 1130

so- so. 13.17 PE 1130

so- so. 16.42 PE 1130

S0L+ so. 20.07? PE 1130

s2 o+

S,0+ S,0 10.3±0.1 LE 2022,2172

SFJ

SF- sf5 nf2 NF, + F,? 16.0 ± 0.2 VC 114 1144

SF+

SF- sf5 nf. nf3 ? 15.9 ±0.2 VC 151 1144

SFJ

sf5- sf6 F 15.29 PI 45 2027

sf- sf6 F 16.53 PI 2027

sf- SFfi F 15.85 ±0.15 RPD 58 196

SF- sf6 F 17.0 ±0.2 RPD 196

sf5- sf6 F 18.0 ± 0.2 RPD 196

SF- sf5 nf2 NF-? 12.0 ± 0.2 VC . 1144

SF- SF5 NF2 NF, 14.3 ±0.5 LE 74 1144

CHS+ CHS- C,H4 S CHs 12.3±0.2 EVD 270 51

(Ethylene sulfide)

CHS- CH3 SCH3 ch4 +h? 15.6 ±0.2 EVD 317 84

CHS- C3 H6 S c,h4 + h? 14.1 ±0.2 EVD 280 188

(Propylene sulfide)

CHS- (CH2 )3 S c,h4 +h? 13.9 ±0.2 EVD 271 52

(Trimethylene sulfide)

CHS- C,H5 SCH3 15.9± 0.4 EVD 176

CHS- C4 H4 S c3h3 ? 13.0 ±0.2 EVD 249 2166

(Thiophene)

CHS- CH3 SCH2 CH=CH, CH,CH=CH, 13.8 ±0.3 EVD 298 186

+ h2 ? CHS- (CH2 )4 S c2 h5 +h2 13.8 ±0.2 EVD 285 52

(Tetrahydrothiophene)

175
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

CHS + rc-C3 H7 SCH3 15.2 ±0.4 EVD 176

CHS + i50-C3 H7 SCH3 16.4 t 0.4 EVD 186

CHS + c2 h5 sc2 h5 15.3 ± 0.5 EVD 84

CHS + Ch H5 SD c5 h4 d? 12.7 ±0.2 SL 1039

(Deuterated benzenethiol)

CHS + ChH5 SCH3 c6h5 +h2 14.5 SL 286 307

(Phenyl mlethyl sulfide)

CHS + Cfi H5 SC2 H5 12.5 SL 307

(Phenyl ethyl sulfide)

CHS + CH3 SSCH3 ch4 s+h 15.5 ±0.3 EVD 305 176

CHS + CH3 SSCH3 ch4 +sh 13.6 SL 292 307

CHS + c2h5 ssc2 h5 17.8 ± 0.5 EVD 186

CHS + CH3 NCS 12.9 ± 0.2 SL 315

CHS + C2H5 NCS 15.2 ±0.5 SL 315

CHS + CH3 SSSCH3 14.5 ±0.3 EVD 84

CDS+ CDS + c6 h5 sd C5 H5 ? 12.7 ±0.2 SL 1039

(Deuterated benzenethiol)

ch2 s

+ CH2 S

+ c2 h4 s ch2 12.7 ± 0.2 EVD 219 51

(Ethylene sulfide)

ch2 s+ ch3 sch3 ch4 11.2 ± 0.2 EVD 267 84

ch2 s+ c3 h«s c2 h2 +h2 12.4± 0.3 EVD 252 188

(Propylene sulfide)

CH2 S

+ (CH2 )3 S c2 h2 +h2 11.8 ± 0.2 EVD 233 52

(Trimethylene sulfide)

CH.S + c2 h5 sch3 C2 H5 + H 13.6 ±0.3 EVD 222 176

CH2 S

+ ch3 sch.ch=ch. 11.4 ± 0.3 EVD 186

ch2 s+ (CH2 ) 4 S 13.0± 0.2 EVD 52

(Tetrahydrothiophene)

CH2 S

+ n-C3 H7 SCH3 14.1 ±0.3 EVD 176

ch2 s+ i 5 o-C3 H7 SCH3 15.5±0.4 EVD 186

ch2 s+ c2 h5 sc,h5 12.5±0.3 EVD 84

CH-S+ ch3 ssch3 12 . 2 ± 0.2 EVD 176

CH2 S+ ch3 sssch3 13.4± 0.3 EVD 84

ch3 s+ Heat of formation 218 kcal mol 1 ch:! s

+ ch3 s 8.06±0.1 SL 218* 120

ch3 s+ ch3 sch3 ch3 11.7 ±0.2 EVD 228 84

ch3 s

+ ch3 sch3 ch3 1 1 .24 ±0.1 SL 217* 120

ch3 s+ ch3 sch3 ch3 11.3 SL 219* 307

ch3 s+ CHaSCDs cd3 11.0 SL 307

ch3 s+ CsHeS c2 h2 +h 13.5±0.2 EVD 225 188

(Propylene sulfide)

ch3 s+ (CH2 )3 S c2 h3 12.3 ±0.15 EVD 233 52

(Trimethylene sulfide)

CH3 S

+ c2 h5 sch3 ch3 +ch2 14.7±0.2 EVD 198 176

CILS + ch3 sch2 ch=ch. ch2 ch=ch2 ? 11.9 ± 0.2 EVD 254 186

CH3 S+ (CH2 )4 S ch,=c=ch2 14.0±0.2 EVD 217 52

(Tetrahydrothiophene) +H?

176
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

ch3 s

+ n-C3 H7 SCH3 c2 h5 +ch2 14.0 ±0.2 EVD 185 176

ch3 s+ i5o-C3 H7 SCH3 c2 h5 +ch2 15.3 + 0.2 EVD 213 186

ch3 s+ c2 h5 sc2 h5 ch3 +c2 h4 13.5 + 0.2 EVD 246 84

ch3 s+ c2 h5 sc2 h5 ch3 + c2 h4 12.75 SL 228 307

ch3 s+ (n-C3 H7 )2 S 12.65 SL 307

ch3 s+ CH3 SSCH3 ch3 s 13.0 + 0.4 EVD 262 176

ch3 s+ ch3 ssch3 ch3 s 11.1 SL 218* 307

ch3 s+ ch3 ssch3 ch3 s 11.12 + 0.1 SL 218* 120

ch3 s+ ch3 sssch3 ch3 + s2 12.9 ± 0.2 EVD 234 84

CH>DS+ ch2 ds+ ch3 scd3 chd2 11.05 SL 307

chd2 s

+ chd2 s+ ch3 scd3 ch2 d 11.55 SL 307

cd3 s+

cd3 s+ ch3 scd3 ch3 11.15 SL 307

ch3 sh+ Heat of formation 212 kcal mol 1 ch4 s+ ch3 sh 9.440 ±0.005 PI 212 * 182

ch4 s+ c2 h5 sch3 c2 h2 +h2 ? 11.8 ± 0.2 EVD 204 176

ch4 s+ ch3 sch2 ch=ch2 ch2=c=ch2 ? 11.5 ± 0.2 EVD 229 186

ch4 s+ n-C3 H7 SCH3 c2 h2 +ch4 ? 11.3±0.2 EVD 205 176

ch4 s

+ iso-C3 H7 SCH3 c2 h2 +ch4 ? 12 . 0 ± 0.2 EVD 219 186

ch4 s+ ch3 ssch3 cs+h2 ? 11.5±0.2 EVD 204 176

ch4 s+ ch3 ssch3 cs+h2 ? 11.2 SL 197 307

ch5 s

+ ch5 s+ c2 h5 sch3 c2 h2 +h? 12.0±0.3 EVD 156 176

CH5S+ ra-C3 H7 SCH3 c2 h2 +ch3 ? 11 . 0 ± 0.2 EVD 147 176

CH5S+ ( 5 o-C3 H7 SCH3 c2 h2 +ch3 ? 12.1 ± 0.2 EVD 170 186

ch3 s

+ ch3 ssch3 CS + H? 11.9±0.2 EVD 161 176

c2 h2 s

+ c2 h2 s

+ c2 h4 s 2H? 15.0 ± 0.2 EVD 261 51

(Ethylene sulfide)

c2 h2 s+ c3 h6 s ch3 +h? 15.6±0.4 EVD 294 188

(Propylene sulfide) c2 h2 s+ C4H4S c2 h2 10.8 ± 0.2 EVD 219 2166

(Thiophene)

c2 h2 s

+ (CH2 )4 S 17.0±0.3 EVD 52

(Tetrahydrothiophene)

C2 H2 S+ c2 h5 ssc2 h5 18.6 ±0.5 EVD 186

c2 h3 s

+ c2 h3 s+ c2h4 s H 11.4± 0.2 EVD 230 51

(Ethylene sulfide)

c2 h3 s+ C3 H,iS CH.i 12.3 ± 0.3 EVD 270 188

(Propylene sulfide)

c2 h3 s+ G2 H5 SCH3 ch3 +h2 13.4±0.4 EVD 262 176

c2 h3 s+ (CH2 ) 4 S 15.7 ± 0.4 EVD 52

(Tetrahydrothiophene)

c2 h3 s+ iso-C3 H7 SCH3 16.1 ±0.3 EVD 186

c2 h3 s+ c2 h5 sc2 h5 14.6 ±0.4 EVD 84

c2 h3 s+ c2 h5 ssc2 h5 16.2 ± 0.3 EVD 186

177
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) c2 h4 s

+ (Ethylene sulfide) 224 keal mol 1 c2 h4 s+ c2 h4 s 8.87±0.15 EVD 224* 51

(Ethylene sulfide)

C2 H4 S

+ c2 h4 s 8.9 EC 225 218

(Ethylene sulfide)

C2 H4 S+ (CH2 )4 S C2 H2 + H2 11.7 ±0.3 EVD 208 52

(Tetrahydrothiophene)

C2 H4 S+ c2 h5 sc2 h5 c2 h4 + h2 ? 11 . 2 ± 0.2 EVD 226 84

c2 h4 s+ C2 H5 SSC2 H5 c2 h5 +sh? 12.3±0.3 EVD 207 186

C2 H4 S+ C2H5SSC2 H5 c2 h4 +h2 s? 11.6 SL 243 307

c2 h5 s

+

c2 h5 s

+ CH3 SCH3 H 11 . 8 ± 0.2 EVD 211 84

c2 h5 s+ C2 H5 SCH3 ch3 11.8 ± 0.2 EVD 225 176

c2 h5 s+ CH3 SCH2 CH=CH2 C2 H3 12 . 0 ± 0.2 EVD 222 186

c2 h5 s+ n-C3 H7 SCH3 C2 H5 11.9±0.2 EVD 230 176

C2 H5 S+ )so-C3 H7 SCH3 c2 h3 +h2 13.5±0.3 EVD 225 186

c2 h5 s+ C2 H5 SC2 H5 c2 h5 12 . 0 ± 0.2 EVD 232 84

C2 H5 S+ C2 H5 SC2 H5 C2 H5 11.05 SL 210 307

c2 h5 s+ (n-C3 H7 )2 S C2 H5 + C2 H4 12.2 SL 216 307

c,h5 s+ CH3 SSCH3 SH 10.9±0.2 EVD 212 176

C2 H5 S+ CH3 SSCH3 SH 11.0 SL 214 307

c2 h5 s+ C2 H5 SSC2 H5 C2 H5 S 12.5 + 0.3 EVD 245 186

C2 H5 S+ C2 H5 SSC2 H5 c2 h5 s 11.15 SL 214 307

c2 h5 sh+ Heat of formation 203 kcal mol 1 CH3SCH 3 191 kcal mol 1 c2 h6 s+ C2 H5 SH 9.285 ±0.005 PI 203* 182

C2 H6 S

+ C2 H5 SH 9.21 ±0.05 cs 201 384

c2 h6 s+ CH3 SCH3 8.685 ±0.005 PI 191* 182

c2 h6 s+ ch3 sch3 8.70 ±0.20 EVD 192 84

c2 h6 s+ CH3 SCH3 9.0 SL 199 307

c2 h«s + C2 H5 SC2 H5 c2 h4 10.4 ±0.2 EVD 207 84

C2 H6 S+ C2 H5 SC2 H5 c2 h4 10.4 SL 207 307

c2 h3 d3 s+

C2 H3 D3 S+ CH3 SCD3 8.7 SL 307

c3 h5 s

+ C3 H5 S+ c3 h6 s H 11.2 ±0.3 EVD 226 188

(Propylene sulfide)

C3 H5 S+ ch3 sch2 ch=ch2 ch3 11 . 0 ± 0.2 EVD 231 186

c3 h6 s

+ c3h6 s+ C3 H6 S 8 . 6 ± 0.2 EVD 00 *

(H 188

(Propylene sulfide)

c3 h6 s+ (CH2 )3 S 8.9±0.15 EVD 220* 52

(Trimethylene sulfide)

c3 h6 s+ (CH2 )3 S 8.9 EC 220 218

(Trimethylene sulfide)

178
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c3 h7 s

+ c3 h7 s

+ n-C3 H7 SCH3 ch3

1. 7 ± 0.2 EVD 217 176

C3 H7 S+ i5o-C3 H7 SCH3 ch3 11.7 ±0.2 EVD 215 186

c3 h7 s+ C2 H5 SC2 H5 ch3 11.6 ± 0.2 EVD 214 84

c3 h7 s+ c2 h5 sc2 h5 ch3 10.65 SL 193 307

c3 h7 s+ (n-C3 H7 )2 S CH3 + C2 H4 11.55 SL 192 307

n-C3 H7 SH+ Heat of formation 1 98 kcal mol 1 C2 H5 SCHJ 183 keal mol 1 c3 h8 s+ n-C3H7 SH 9.195 + 0.005 PI 198* 182

c3 h8 s+ c2 h5 sch3 8.70 + 0.10 EVD 186 176

c3 h8 s+ c2 h5 sch3 8.55 ±0.01 PI 183* 182

c3 h8 s+ (n-C3 H7 )2 S 10.4 SL 307

C4 H4 S

+ (Thiophene) Heat of formation 229 kcal mol -1

C4 H4 S+ C4 H4 S 8.860 ±0.005 PI 229* 182

(Thiophene)

C4 H4 S+ C4 H4 S 9.2 ± 0.2 EVD 237 2166

(Thiophene)

C4 H4 S + C4 H4 S 9.30 CTS 239 2031

(Thiophene)

C4 H4 S

+ C«H,SD c2 hd 11 . 8 ± 0.2 SL 1039

(Deuterated

C4 H4 S

+ benzenethiol)

C4 H3 SC2 H5 •hene) ' c2 h4 11.5 ± 0.2 EVD 265 2166

(2-Ethylthiop

c4 h4 s+ C4 H3 SC3 H7 C3 Hh 11.1 ± 0.2 EVD 258 2166

( 2-Propylthiophene)

C4 H4 S

+ C4 H3 SC4 H9 i-c4 h8 ? 11 . 0 ± 0.2 EVD 256 2166

(2-Butylthiophene)

c4 h3 ds+

C4 H3 DS+ c6 h,sd c2 h2 11.8 SL 1039

(Deuterated benzenethiol)

c4 h7 s+

C4 H7 S+ (CH2 )4 S H 12.4 ± 0.3 EVD 226 52

(Tetrahydrothiophene)

c4 h8 s

+

c4 h8 s+ ch3 sch2 ch=ch2 8.70± 0.2 EVD 211 * 186 c4 h8 s+ (CH2 )4 S 8.57 ±0.15 EVD 190* 52

(Tetrahydrothiophene)

c4 h8 s+ (CH,)4 S 8.4 EC 186 218

(Tetrahydrothiophene)

n-C4 H9 SH+ Heat of formation 192 keal mol 1 n-C3 H7 SCH+ 183 kcal mol-1

iso-C3 H7 SCH+ 179 kcal mol-1

c2 h5 sc2 h+ 175 keal mol-1

c4 h10 s+ n-C4 H9 SH 9.14±0.02 PI 192* 182

C4 H10 S n-C3 H7 SCH3 8.8±0.15 EVD 183* 176

C4 H10 S i' 5o-C3H7 SCH3 8.7 ± 0.2 EVD 179* 186

C4 H,oS+ c2h5 sc2 h5 8.430 ±0.005 PI 175* 182

C4 HI0S

+ c2h5 sc2 h5 8.49 ±0.19 EVD 176 84

C4 H10S

+ c2 h5 sc2 h5 8.6 SL 178 307

179
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

c5 h5 s+

C5 H5 S+ C4 H3 SC2 H5 ch3 11.4±0.2 EVD 242* 2166

(2-Ethylthiophene)

c5 h5 s+ c4h3 sc3 h7 c2h5 11 . 4± 0.2 EVD 245* 2166

(2-Propylthiophene)

c5 h5s+ c4 h3sc4 h9 u-C3 H7 11.3±0.2 EVD 241* 2166

(2-Butylthiophene)

c5 h9 s+

CsH»S + (n-C3 H7) 2 S ch3 +h2 ? 10.9 SL 190 307

c5h„s+

C5 HhS + (n-C3 H7 )2 S ch3 11.55 SL 205 307

cyclo-C6 H5 S

+ Heal of formation 250 kcal mol-1

c6 h5 s+ c6h5 s 8.63 ±0.1 SL 250* 120

(Phenyl sulfide radical)

c6h5 s+ c6h5 sd D 12.2 SL 1039

(Deuterated benzenethiol)

C6H5 S+ ChH5 SCH3 ch3 12.1 ± 0.1 SL 269 120

(Phenyl methyl sulfide)

C6 H5 S+ ChH5 SCH3 CH3 12.15 SL 271 307

(Phenyl methyl sulfide)

ck h5 s

+ c6h5 sc2 h5 C2H5 12.2 SL 274 307

(Phenyl ethyl sulfide)

<rcfo-C,; H5 SH Heat of formation 217 kcal mol-1

C«H«S + c6h5 sh 8.32 ±0.01 PI 217* 190

(Benzenethiol)

c«h6 s

+ c«h5 sh 9.46 ±0.04 PI 190

(Benzenethiol)

Cb HhS+ c6 h5 sc2 h5 c,h4 11.4 SL 269 307

(Phenyl ethyl sulfide)

C«H DS+

C«H5DS + ChH5 SD 8.5 ±0.1 SL 1039

(Deuterated benzenethiol)

c6 h8 s+

C«HhS+ c4 h3 sc.h-. 8 . 8 ± 0.2 EVD 215* 2166

(2-Ethylthiophene)

c«h14 s

+ Cfi H14S+ (u-C3 H7 )2 S 8.30 ±0.02 PI 163* 182

C<;Hi 4 S

+ (n-C3 H7 ) 2 S 8.95 SL 178 307

c,h7 s

+ C7 H7 S+ CK H.-,SC 2 Hr, ch3 11.7 SL 255 307

(Phenyl ethyl sulfide)

180
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c7 h8 s

+

C7 HkS + cb h5 sch3 8.9 SL 229* 307

(Phenyl methyl sulfide)

c7 h10 s+

c7 h10s+ c4 h3 sc3 h7 8.6 ± 0.2 EVD 205* 2166

(2-Propylthiophene)

c8 h10 s+

ChH10S

+ c6 h5 sc2 h5 8.8 SL 221 * 307

(Phenyl ethyl sulfide)

c8 h12 s+

c«h12 s+ C4 H3 SC4 H9 8.5 ±0.2 EVD 198* 2166

(2-Butylthiophene)

CH3S+

CH,S + ch3ssch3 ch3 12.1 ± 0.2 EVD 240 176

ch3 s+ ch3 ssch3 ch3 11.45 SL 225 307

ch3s+ c2 h5 ssc2 h5 14.6 ±0.2 EVD 186

ch3 s+ ch3 sssch3 ch3 s 12.3 ±0.2 EVD 251 84

CH4S+

CH4S+ ch3 sssch3 ch2 s 10.8 ± 0.2 EVD 84

c2 h5 s+

C2 H5 S+ c2 h5 ssc2 h5 c2 h5 11.5 SL 223 307

CH3SSCH+ Heat of formation 189 kcal mol 1 ch3 ssch3 8.46 ± 0.03 PI 189* 182

C2 H,;S 2+ ch3ssch3 9.1 ±0.2 EVD 204 176

c2 h6s+ ch3 ssch3 8.53 SL 191 411

C2 Hb S2+ ch3 ssch3 9.05 SL 203 307

C2 Hfi S+ c2 h5 ssc2 h5 c2 h4 10.8 ±0.3 EVD 219 186

C2 H6 S2+ c2 h5|sc2 h5 c2 h4 10.9 SL 221 307

c,h8s+

C-iH^S.?* (CH2 ) 4 S2 8.5 EC 200 218

(Thiadioxane)

c2h5ssc2h+ Heat of formation 173 kcal mol 1

c4 h10s2+ c2 h5 ssc2h5 8.27 ±0.03 PI 173* 182

C4 H1 oS^” c2 h5 ssc2h5 8.30±0.15 EVD 174 186

c4 h10 s+ c2 h5 ssc2 h5 8.85 SL 187 307

181
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

CH3 S+

CH3S3+ CHaSSSCHi ch3 11.4±0.2 EVD 230 84

c2 h6 s+

c,h6 s3+ CH3 SSSCH3 8.80± 0.15 EVD 203* 84

CNS+ CNS + ch3 ncs CHs 14.9 + 0.5 SL 342 315

CNS + c2 h5 ncs C2 H5 14.6 ±0.4 SL 338 315

c2 ns+

C2 NS+ ch3 ncs H> + H? 14.1 ±0.3 SL 304 315

c2 ns+ c2 h5 ncs CH3 + 2H? 16.3 ±0.2 SL 265 315

COS+

(

2 n3/29) Heat of formation 224 kcal mol-1

COS+

(2 Il 1/23) 225 kcal mol-1

cos+(2 nM) 313 kcal mol-1

COS+(22i) 336 kcal mol-1

COS+

(

22j) 380 kcal mol-1

cos+

( 2 n3/29 ?) COS 11.234 S 225 149

cos+(2 n3/ 2g) COS 11.17 ±0.01 PI 224* 190

COS+cn1/2g ?) cos 11.250 s 225 149

COS+(2 n1/2g) cos 11.21 ± 0.01 PI 225* 190

cos+

( 2 ng) cos 11.06 PE 221 92

cos+

( 2 n„) cos 15.04 PE 313* 92

COS+(2 2+) cos 16.043 S 336* 149

COS+(2S+) cos 16.04 ±0.01 s 336* 410

COS+( 22+) cos 16.04 PE 336 92

COS+(2 2g+

) cos 17.938 S 380* 149

COS+( 22+) cos 17.94±0.05 s 380* 410

COS+(22+) cos 17.87 PE 378 92

COS+ cos 19.9 PE 92

SOF+

SOF+ so2 f2 F + 0 18.6±0.1 SL 145 418

so2 f+

SO-F+ SO,F> F 15.1 ±0.2 SL 124 418

so2 f+ FS02NF, nf2 13.1 ±0.1 VC 1144

SO.F+ FS020NF2 N0 +F2 13.3±0.2 VC 1144

so2 f+ (FS02 ) 2 NF fso2 nf 13.5±0.1 VC 1144

so2 f+

so2 f+ so2 f2 13.3±0.1 SL 102 * 418

182
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

CHNS+

CHNS+ C2 H5 NCS c2 h4 11. 38 ±0.15 EVD 276 193, 315

ch2 ns+ CH2 NS+ c2 h5 ncs c2 h2 + H? 12.0±0.3 SL 196 315

c2 hns+

c2 hns+ c2 h5 ncs CH:i + H? 14.0 ±0.2 SL 264 315

C2 HNS+2

C,HNS+ 2 CH3 NCS 2H? 28.0 ±0.5 SL 573 315

c2 h2 ns+

C,H.NS+ CH3 NCS H 11.9±0.2 SL 254 315

c2 h2 ns+ C2H5 NCS CH3 12.5±0.2 SL 281 315

CH3 NCS+ Heat of formation 245 kcai mol 1 CH3 SCN+ 270 kcal mol 1 c2h3ns+ CH3 NCS 9.25 ±0.03 PI 245* 182

C2 H3 NS+ CH3 NCS 9.13±0.15 SL 242 315

C2 H;i NS+ CH3 SCN 10.065 ±0.01 PI 270* 182

C2 H5 NCS+ Heat of formation 237 kcal mol 1 C2 H5 SCN+ 261 kcal mol-1

C3H5 NS+ c2 h5 ncs 9.14±0.03 PI 237* 182

C3H5 NS+ c2 h5 ncs 9.10±0.15 EVD 236 193, 315

c3 h5ns+ c2 h5 scn 9.89 ±0.01 PI 261* 182

c4 h10ns+

c4 h10 ns+ CH3 SCH2 CH2 CH(NH2 )COOH 10. 2 ± 0.2 LE 88

(Methionine)

c7 h5 ns+

C7 H5 NS+ c6 h5 ncs 8.520 ±0.005 PI 259* 182

(Phenyl isothiocyanate)

C7 H5 NS+ c7 h5 ns 8.65 CTS 1211

(Benzothiazole)

c8 h7 ns+

c*h7 ns+ ChH5 CH2 SCN 9.06 ±0.05 cs 274* 2025

(Benzyl thiocyanate)

ch4n2 s

+ ch4 n2 s+ nh2 csnh. 8.50 ±0.05 SL 194* 1390

c-,h6 n2 s

+

C2 H«N2 S

+ NH-CSNHCH., 8.29 ±0.05 SL r— CO CO *

1390

183
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C3H6N2 S+

c3 h6 n2 s+ NH-CSNHCH=CH» 8.29 ±0.05 SL 213* 1390

c3 h8 n2 s

+

C3 H8N2 S+ NH2 CSN(CH3 )2 8.34 ±0.05 SL 186* 1390

C3 H«N2 S+ CH3 NHCSNHCH3 8. 17 ±0.05 SL 184* 1390

c4 h10 n2 s+

c4 h10 n2 s+ CH3 NHCSN(CH3>2 7.93 ±0.05 SL 176* 1390

c5 h12 n2 s+

c5 hI 2 n2 s

+ c5 h12 n2 s 7.98 ±0.05 SL 170* 1390

(Diethyl thiourea)

c5 hI 2 n2 s+ (CH3)2 NCSN(CH3 )2 7.95 ±0.05 SL 173* 1390

c2 h4 so+

c2 h4 scd ch3 cosh 10.00 ± 0.02 PI 182

c4 h10 so+

C4 H10 SO+ (C2 H5 )2 S03 9.68? PI 182

Cl+ Heat of formation 329 kcal mol 1 CD Cl 13.02 S 329* 2113

C1+ Cl 12.83 ±0.1 RPD 325 196

CD Cl 12.9±0.15 LE 327 440

CD Cl* Cl- 11.86 ±0.04 RPD 332 288, 292

CD Cl* Cl 15.51 ±0.03 RPD 329 288, 292

C1+ HC1 H 17.1 ±0.15 LE 320 440

C1+ CCL CC13 16.10±0.2 RPD 333 196

CD MgClo MgCl 19 ± 1.0 NS 353 178

CD PCls PCD? 14 ±1 NS 1101

CD pels PCI + Cl? 20.2 ±0.4 EVD (b) 192

CD PCIa PCI + Cl? 19.8 ±0.4 NS 331 1101

CD CHaCl CH3-? 15.6 ±0.05 RPD 2154

CD CH.iCl ch3 16.6 ±0.05 RPD 330 2154

CD CH3 CI ch3 18.6 ±0.05 RPD 2154

CD CH3 C1 ch3 19.6 ±0.05 RPD 2154

CD CH3 CI CH3 20.1 ±0.05 RPD 2154

CD C.H5 CI ch3 +ch2 ? 23.4 ±0.3 VC 386 356

CD CH3 C=CC1 c3 h3 18.4 ±0.5 VC (b) 13

CD CHCL CH+C1* 22.0±0.3 EVD 340 43

CD CNC1 CN- 13.6±0.1 SL 73

CD CNC1 CN 17.9±0.1 SL 346 73

CD CF3 CI CF, + F

-

? 21 ±1 SL 24

CD C103 F 30+ F? 23.0±0.2 SL 327 53

CD POCL 19 ± 1 NS 1101

CD CHF2 C1 CF> + H? 20.5 ±0.3 EVD 343 43

CD CHFC1, CFC1 + H? 23.0±0.3 EVD 361 43

CD T1C1 T1 16.9±0.1 RPD 330 2159

184
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1 ' Ref.

Cl£ (

2n3/ 2f/) Heat of formation 265 kcal mol-1

CL+( 2 n;! /2(/) Cl2 11.48 ± 0.01 PI 265* 182, 416

C1+ Cl, 11.63 ± 0.04 RPD 268 292

ci.t(%;) Cl2 14.09 ± 0.03 RPD 325 292

Cl2+

( 22+) Cl2 20.61 ±0.06 RPD 475 292

C1+ Cl2 12.03 ±0.05 EVD 277 440

C1+ Cl, 11.64 ±0.05 SL 268 75

Cl 2

2

C1+2 Cl2 32.6 NS 752 75

HCl (

2n3/ 2 ) Heat of formation 272 kcal mol 1 HCl+(2 H1/2 ) 274 kcal mol 1

Hci+(2 n3/2 ) HC1 12.74±0.01 PI 272* 182, 416

Hci+( 2 n:!/2 ) HC1 12.742 ±0.010 PI 272* 1253

HCL( 2 n1/2 ) HC1 12.818 ±0.008 PI 274* 1253

HC1+ HC1 12.56 ±0.1 RPD 268 39

HC1+ HC1 14.16 ± 0.2 RPD 39

HC1 2

HC1+2 HC1 35.5 ±0.5 NRE 797 212

XeCl+

XeCl+ XeCB 11.5 TC 1164

LiCl+

LiCl+ LiCl 10.1 VC 186 2179

Li2 Cl+

Li2 Cl+ Li2 Cl, Cl 10.6 VC 72 2179

BC1+

BC1+ BCla 2C1 18.54±0.07 EVD 273 440

BCD BCIi Cl, 17.2±0.2 VC 300 206

BCD BC13 2C1 20.0±0.2 VC 307 206

BC1+

BC1+ bci3 Cl 13.01 ±0.02 EVD 174 440

BC1+ bci3 Cl 11.8±0.2 VC 147 206

BC1+ bci3 Cl 12.0±0.2 VC 151 206

BC1+ 2

BC1+2 BCls Cl 33.77 ±0.07 EVD 653 440

185
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

sen

BC13+ BC13 12.03 ±0.02 EVD 181 440

BC1+ BCL 10.6 ±0.2 VC 148 206

BC1+ BC13 10.9 ± 0.2 VC 155 206

BC1+ BC13 11.0±0.2 VC 157 206

CC1+

CC1+ CC1 12.9±0.10 NS 420 129

CC1+ CC12 Cl 16.3±0.2 NS 413 319

CC1+ CCL C12 + C1 19.35 ±0.05 NS 393 129

CCD CCL CL + Cl 19.4 ±0.1 NS 394 319

CCD CHC13 HC1 + C1 16.3 ±1.2 EVD 344 43

CC1+ CNC1 N 17.2 ±0.2 SL 316 73

CC1+ CHFCL HC1+F 18.3±0.2 EVD 356 43

CC1|

CC1+ CC12 13. 10 ±0.08 NS 368 129

CC1+ CC12 13.2±0.2 NS 370 319

CC1+ CCL CL 16. 10 ±0.02 NS 347 129

CC1+ CCL Cl2 16.5±0.2 NS 356 319

CC1J Heat of formation 214 kcal mol -1

CC1.+ CCL 8.78 ±0.05 EVD (a) 441

CClj CCL 8.64 TC 213 136

CC1+ CCL Cl 11.65±0.10 RPD 215* 196

CC13+ CCL Cl 1 1 .67 ±0.1 EVD 215* 441

CClj .CCL Cl 11.90±0.07 NS 221 129

CC1+ CHCL H 11.70±0.09 RPD 193 1139

CC1+ c2 hcl CHCL 11. 54 ±0.1 SL 72

cci+ CFCL F 12.77 ±0.15 RPD 210* 185

CC13+ CFCL F 14.3±0.2 RPD 185

CC13+ CFCL F 15.5 ±0.2 RPD 185

CC1.+ CCLBr Br 10.90±0.1 EVD 214* 441

CC1+ cclcochn2 11.0 VC 2174

CC1|

CC1+ CCL 11.47 ±0.01 PI 240* 182. 416

CC1+ CCL 11.48 TC 240 1164

C2 C1J

C2 C1+ c2 cl 9.32 ±0.01 PI 212* 182, 168

C2 C1+ c2 cl 9.71 TC 221 136

cio+

C10+ CIO3F 20 + F 18.0±0.5 SL 271 53

CIO!

C10+ CIO3F O + F 15.7±0.5 SL 278 53

186
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

CIO5

CIO- CIO3F F 14.3+1.2 SL 305 53

FC1+

FC1+ F3 CI 12.7±0.3 VC 357

F2 C1+

F2 C1+ F3 C1 F 12.8 ± 0.3 VC 237 357

F3 C1+

F3CI- F3 C1 13.0±0.2 VC 261 357

MgCl+

MgCl- MgCli Cl 11.5±0.5 VC 140 178

MgC4

MgCl- MgCl, 11.1 ± 0.2 VC 160 178

Mg2 ClJ

MgiCl^ Mg^CL, Cl 11.2±0.3 VC -4 178

SiCl+ Heat of formation 101 kcal mol -1

SiCl- SiCl, Cl 12.48 ±0.02 SL 102 * 2182

SiCl+ SiaClfj SiCl3 11.55 ±0.1 SL 2183

SiCl+ HSiCla H 11.91 ±0.03 SL 100* 2182

SiCl3+ CHsSiCla ch3 11.90 ±0.08 SL 115 2182

SiCl- C2 H5 SiCl3 c2 h5 12.10±0.03 SL 123 2182

SiCl+ iso-C3 H7 SiCl3 WO-CsHy 13.1 ±0.2 SL 147 2182

SiCl- feri-CjHuSiCLj tert- C4 H9 13.0±0.1 SL 2182

PC1+

PCI- PCI3 2C1 16.83 ±0.3 EVD 261 192

PCI- PCI, 2C1 16.5±0.5 NS 254 1101

PC1+ P.CLj PCI2 +CI 15.7 ±0.3 EVD 192

PCP POCI3 O+CI2 ? 17 ± 1 NS 199 1101

P2 C1+

P2 CI+ p2 cl CI2 + Cl 16.1 ±0.4 EVD 192

PC\t

PCI- PCI3 Cl 12.32 ±0.2 EVD 186 192

PCI- PCI3 ci- 11.8±0.5 NS 262 1101

PC1+ P2 CI4 PC12 11 . 68 ± 0.2 EVD 192

PC1+ POCI3 o+ci-? 13.3±0.5 NS 172 1101

187
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

P2 C1+

P2 CI+ P2 CI4 Cl* 13.9 + 0.3 EVD 192

PCI3 Heat of formation 160 kcal mol - 1

PCI3+ PCE 9.91 PI 160* 1091

PC.I3

" PCE 10.75 + 0.2 EVD 179 192

PCI3 PCE 10.6 ± 0.2 NS 176 1101

PCI3 POCE 12.3 + 0.5 NS 1101

P2 C1J

P2 C1+ p2 ce Cl 11.7 ±0.3 EVD 192

P2 Clt

P2 C1+ P2 CI4 9.36 ±0.2 EVD 192

CHC1+ CHC1+ CHCE 2C1 17.5 ± 0.2 EVD 321 43

CHC1+ CHFC12 Cl+F 19.0±0.2 EVD 321 43

ch2 cp

CH.C1+ CH.C1 9.32 SL 244 141

CH,C1+ CH-C1 9.70 ±0.09 NS 253 131

CH,C1+ CH2 C1 9.42 TC 246 136

CH.C1+ CH3 CI H-? 13.06 RPD 248 160

CH,C1+ CH3 CI H-? 14.35 RPD 160

CH,C1+ CHiCl H 12.98 ±0.07 RPD 228 1139

CH2 C1+ CH3 CI H 13.64 RPD 243 160

ch2 ci+ CH3 CI H 14.95 RPD 160

CH,C1+ CH3 CI H 12 . 88 ± 0.1 SL 226 72

CH.C1+ CH3 CI H 13.0±0.2 VC 228 356

CH.C1+ c,h5 ci CH3 13.20±0.2 SL 244 72

CH.C1+ C2 H5 C1 CH.i 13.6±0.2 VC 254 356

CH.C1+ CH.C1. Cl 12.12 ± 0.1 SL 228 72

CH2 C1+ CH2 C12 Cl 12.89 ±0.03 NS 246 131

CH-C1+ ch,cich2 ci CH.C1 12.52 ±0.1 SL 229 72

CH,C1+ CHjCOCH.CI COCH3 13.8±0.07 VC 266 2174

CH.C1+ C3 H50C1 C2 H30 12.5 ±0.1 EVD 266 153

(Epichlorohydrin)

CH,C1+ CH.ClBr Br 11. 56 ± 0.1 SL 228 72

CH2 C1+ CH2 C1C0CHN2 cochn2 12.2 ± 0.1 VC 2174

CH3 C1+

(

2 Ei/2 ) Heat of formation 239 kcal mol 1 CH3 Cl+

(

2 E3/ 2 ) 241 kcal mol 1 CH3 C1+,

(2 Ei/2 ) CH3 C1 11.220 s 239* 2064

CH3 Cl+

(2 E1/2 ) CH3 C1 11.265 ±0.003 PI 240* 1253

CH3 CP(2 E3/2 ) CH3 C1 11.305 s 241* 2064

CH3 Cl+

( 2 E3/ 2 ) CH3 C1 11.340 ±0.003 PI 242* 1253

CH3 C1+ CH3 C1 11.28±0.01 PI 241 182,416

CH3 C1 + CH3 C1 11.28 PI 241 1399

188
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

CH3 Cl+

(2 E3/2 ) CH3 C1 11.4±0.05 RPD 244 2154

ch3 ci+ ch3 ci 11.42 ±0.02 RPD 244 289

ch3 ci+ ch3 ci 11.9 ±0.05 RPD 2154

ch3 ci + ch3 ci 12.07 ±0.04 RPD 289

ch3 ci+ ch3 ci 13.02 ±0.04 RPD 289

ch3 ci+ ch3 ci 13.2 ±0.05 RPD 2154

ch3 ci+ ch3 ci 18.71 ±0.06 RPD 289

ch3 ci+ ch3 ci 10.9±0.3 SL 232 364

ch3 ci+ ch3 ci 11.3 ±0.1 SL 241 364

ch3 ci+ ch3 ci 11.44 ±0.02 SL 244 2146

ch3 ci+ ch3 ci 11.45 ±0.05 SL 245 72

ch3 ci+ ch3 ci 11.33 TC 242 136

C2 HC1+

c2 hcd c7s-C2 H2 C12 HC1 13.27 ±0.05 SL 329 114

c2 hci+ ^ans-C2 H2 Cl2 HC1 13.39 ±0.05 SL 332 114

C2 H2 C1+

c2 h2 ci+ ci5-C2 H2 Cl2 Cl 12.29 ±0.05 SL 255 114

c2 h2 ci+ £rans-C2 H2 Cl2 Cl 12.61 ±0.05 SL 263 114

C2 H3 C1+ Heat of formation 239 kcal mol-1

c2 h3 ci+ c2 h3 ci 9.998 S 239* 261

c2 h3 ci+ c2 h3 ci 9.995 ±0.01 PI 239* 182

(MHsCD c2 h3 ci 9.995 PI 239* 168

c2 h3 ci+ c2 h3 ci 10.00 ±0.02 PI 239* 268

c2 h3 ci+ c2 h3 ci 10.515 PI 268

c2 h3 ci+ c2 h3 ci 10.10±0.03 EVD 242 268 c2 h3 cl C2 H£1 10.39 TC 248 136

C2 D3 C1+

c2 d3 ci+ c2 d3 ci 10.02 ±0.02 PI 268

c2 d3 ci+ c2 d3 ci 10.10±0.03 EVD 268

C2 H5 C1(2 Ei/ 2 ) Heat of formation 226 keal mol 1

C2 H5 Cl+

( 2 E1/2 ) c2 h^ci 10.97 ±0.02 PI 226* 416

C2 H5 C1+

( 2Ei/2 ) c2 h5 ci 10.98 ±0.02 PI 226* 182

C2H5 C1+

( 2 Ei/2 ) c2 h5ci 11.1 RPD 229 160

c2 h5 ci+ c2 h5 ci 11.5 RPD 160

Cj-HsCE c2 h.^ci 12.5 RPD 160

C2 H5 C1+ c2 h5 ci 13.2 RPD 160

c2 h5 cp c2 h5 ci 11.10±0.06 SL 229 2146

c2 h5 ci+ c2 h5 ci 1 1.16 ± 0.05 SL 231 72 c2 h5 ci+ c2 h5 ci 1 1 .2 ± 0.

VC 231 356

c2 h5 cl c2 h5 ci 11.5 TC 2038

C2H5C1+ C.HsCl 12.3 TC 2038 c2 h5 ci+ C2 H5 C1 13.2 TC 2038

C3 H3 C1+

c3h3 cp ch3 c^cci 9.9 ±0.1 VC 265* 13

c3 h4 ci+

c3 h4 cl chci=chch2 8.06 TC 209 136

c3 h4 ci+ ch2=ccich2 8.16 TC 210 136

189

323-656 0- 69—13
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other AP or IP Heat of

products (eV) Method formation Ref.

(kcal mol-1

)

#i-C3H7 C1+ Heat of formation 218 kcal mol 1 iso-C3 H7 Cl+ 212 kcal mol 1 c3h7 ci+ n-C 3H7 Cl 10.82 ±0.03 PI 218* 182

c3 h7cd n-C 3 H7 Cl 10.78 ±0.04 SL 218 2146

c3 h7 ci+ n-C3 H7 Cl 11.05 ±0.05 SL 224 72

c3 h7 cl n-C3 H7 Cl 11.0 TC 2038

c3h7 cl n-C3 H7 Cl 12.0 TC 2038

c3h7 ci+ n-C3 H7 Cl 12.4 TC 2038

c3 h7 ci+ n-C3 H7Cl 13.2 TC 2038

C3 H7 C1+ ?’so-C3 H7 C1 10.78 ±0.02 PI 212* 182

c3 h7 cl j50-C3 H7 C1 11.2 RPD 160

c3 h7 ci+ iso-C3 H7 C1 11.6 RPD 160

c3 h7 cp tso-C3 H7 Cl 12.5 RPD 160

C3H7 C1+ i5o-C3 H7 Cl 13.1 RPD 160

c3 h7 cp 150-C3 H7 C1 10.77 ±0.03 SL 212 2146

c3 h7 ci+ jso-C3 H7 C1 11.0 TC 2038

c3 h7 cl t5o-C3 H7 Cl 11.7 TC 2038

c3 h7 cp t5o-C3 H7 Cl 12.7 TC 2038

C3 H7 C1+ 150-C3 H7 C1 13.2 TC 2038

Heat of formation 211 kcal mol 1 sec-C4 H9Cl+ 207 kcal mol-1

iso-C4 H9 Cl+ 208 kcal mol-1

tert-C4 H9Cl+ 202 kcal mol 1 C4 H9 CP n-C4 H9 Cl 10.67 ±0.03 PI 211* 182

c4 h9 ci+ n-C4 H9 Cl 10.50±0.07 SL 207 2146

C4 H9 C1+ sec-C4H9 Cl 10.65 ±0.03 PI 207* 182

c4 h9 cl 5ec-C4 H9 Cl 10.52 ±0.1 SL 204 2146

C4 H9 C1+ (5o-C4H9 C1 10.66 ±0.03 PI 208* 182

C4H9 C1+ f50-C4H9 Cl 10.48 ±0.1 SL 203 2146

C4H9 C1+ teri-C4H9 Cl 10.61 ±0.03 PI 202* 182

c4 h9 ci+ tert-C4H9 Cl 10.3±0.1 SL 194 2146

C5 H4 C1+ C5 H4 CL C5 H4 CI 8.78 SL 126

(Chlorocyclopentadienyl radical)

cyclo-C6 H5 C1+ Heat of formation 222 kcal mol 1 ChH5 C1+ Cr H5 C1 9.07 ±0.02 PI 222* 182,416

(Chlorobenzene)

ChHoCP c6 h5 ci 9.07 PI 222* 168

(Chlorobenzene)

c6 h3 ci+ ChH5 C1 9.35 PE 2015

(Chlorobenzene)

ChH-X1+ Cr H5 C1 9.68 PE 2015

(Chlorobenzene)

C«H5 C1+ ChH5 C1 11.44 PE 2015

(Chlorobenzene)

c6 h5 cl c«h3 ci 11.79 PE 2015

(Chlorobenzene)

ChH5 C1+ Cr H5 C1 12.38 PE 2015

(Chlorobenzene)

C«Hr,Cl + ChH5 C1 17.02 PE 2015

(Chlorobenzene)

190
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation

(kcal moP 1 )

Ref.

C«H3 C1+ C6 H,C1 9.60 SL 234 1066

(Chlorobenzene)

C„H5 C1+ CfiHsCl 9.6 ±0.1 SL 234 301

(Chlorobenzene)

C6H5 C1+ c6 h5 ci 9.14 TC 224 136

(Chlorobenzene)

C7 H6C1+

C7 H6 C1+ C8 H4 C1CH2 7.95 ±0.1 SL 213* 69

(p-Chlorobenzyl radical)

c7 h7 ci+

C7 H7 C1+ ChHsCH.CI 9. 19 ±0.05 CS 219* 2025

(Benzyl chloride)

C7 H7 C1+ C8 H4 C1CH3 8.83 ±0.02 PI 208* 182

(o-Chlorotoluene)

C7 H7 C1+ C6 H4 C1CH3 8.92 TC 210 136

(o-Chlorotoluene)

C7 H7 C1+ C8 H4 C1CH3 8.83 ±0.02 PI 207* 182

(m-Chlorotoluene)

C7 H7 C1+ CeHiClCH.5 9.10±0.05 CS 213 2025

(m-Chlorotoluene)

C7 H7 C1+ C8 H4 C1CH3 8.93 TC 209 136

(m-Chlorotoluene)

C7 H7 C1+ C6H4 C1CH3 8.69 ±0.02 PI 204* 416, 182

(p-Chlorotoluene)

C7 H7 C1+ CelRClCHa 9.21 SL 216 1066

(p-Chlorotoluene)

c7 h7 ci+ c«h4 cich.3 8.95 TC 210 136

(p-Chlorotoluene)

c7 h7 cc c«h4 cich3 9.24 TC 217 2194

(Chlorotoluene)

c7 h9ci+

c7 hh ci+ c7 h9 ci 9.1 ±0.15 SL 233* 2155

(endo-5-Chloro-2-norbornene)

C7 Ha Cl+ C7 H9 C1 9.15±0.15 SL 234* 2155

(e^o-5-Chloro-2-norbornene)

c7 h9 ci+ c7 h9 ci 9.51 ±0.15 SL 234* 2155

(3-Chloronortricyclene)

CHCU

CHC1+ CHC12 9.30 SL 245 141

CHC1+ CHC12 9.54±0.10 NS 251 131

CHC1+ CHC12 9.02 TC 239 136

CHC1+ CH2 C12 H 12.12 ± 0.05 RPD 205 1139

CHC1+ CH,C12 H 13.00±0.10 NS 226 131

CHC1+ CHCI3 Cl 11.64±0.20 EVD 215 43

CHC1+ CHCIi Cl 1 1 .70 ±0.1 SL 216 72

CHC1+ CHCR Cl 12.43 ±0.02 NS 233 131

CHC1+ chci2 chci2 CHCh 11.55 ±0.1 SL 200 72

CHC1+ CHCBBr Br 11. 02 ± 0.1 SL 213 72

191
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1 Ref.

) CH2 C1+

CH2 C1+ CH2 C12 11.35 + 0.02 PI 240* 182, 416

CH2 C1+ ch2 ci2 11.49 + 0.05 SL 243 72

CH2 C1+ ch2 ci2 11.60 TC 245 1164

cis-C2 H2 Cl^ Heat of formation 223 kcal mol 1 trans-C2 H2 Cl£ 224 kcal mol-1

c2 h2 ci2+ CH2 =CC12 9.459 S 218 269

c2 h2 ci+ ch2 =cci2 9.79 PI 225* 168

c2 h2 ci+ ch2 =cci2 10.16 TC 234 136

c2 h2 ci+ cis-C2 H2 Cl2 9.652 S 223 261

c2 h2 ci+ cis-C2 H2 Cl2 9.65 + 0.01 PI 223* 182

c2 h2 ci+ cis -C2 H2 C12 9.65 PI 223* 168

c2 h2 ci+ a’5-C2 H2 Cl2 9.66 ±0.02 PI 224* 114. 268.

1058, 1190

c2 h2 ci+ ci5-C2 H2 Cl2 9.66 ±0.05 EVD 224 268

c2 h2 ci+ ci's -C2 H2 C12 9.67 ±0.05 SL 224 114,

1190, 1058

c2 h2 ci+ trans- C2 H2 C12 9.954 S 231 261

c2 h2 ci+ trans-C2 H2 Cl2 9.63 PI 224* 168

c2 h2 ci+ tran5-C2 H2 Cl2 9.64 ±0.02 PI 224* 114, 268.

1058. 1190

c2 h2 ci+ tran5-C2 H2 Cl2 9.66 ±0.03 PI 224* 182

c2 h2 ci+ trans- C2 H2 C12 9.96 ±0.05 EVD 231 268

c2 h2 ci+ tran5-C2 H2 Cl2 10.00 ±0.05 SL 232 114, 1190

c2 h2 ci+ tran5-C2 H2 Cl2 10.00 ±0.05 NS 232 1058

c2 h2 cl CHC1=CHC1 10.275 PI 268

c2 h2 cl CHC1=CHC1 10.50 PI 268

c2 h2 ci+ CHC1=CHC1 10.74 PI 268

c2 h2 ci+ CHC1=CHC1 10.14 TC 136

C2 H4 C4

C.H4 C1+ CH2 C1CH2 C1 11.12±0.05 PI 225* 182

C2 H4C1+ ch2 cich2 ci 11.25±0.05 SL 228 72

C3 H4 C4

C3 H4 C1+ ch2 =ccich2 ci 9.82 ±0.03 PI 218* 182

C3 H6C1|

C3 H6 C1+ 1,2-C3 H6 C12 10.87 ±0.05 PI 215* 182

C:? H6 C1J 1 ,3-C.iH6Cl2 10.85 ±0.05 PI 215* 182

192
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol -1

) o-CeH4 Cl£ Heat of formation 217 kcal mol-1

m-C6 H4 Cl£ 217 kcal mol 1 p-C6 H4 C4 212 kcal mol-1

C«H4 C1+ ChH^CF f 9.06 PI 217* 168

(o-Diehlorobenzene)

CeRjClJ c6 h4 ci2 9.07 ± 0.01 PI 217* 182

(o-Dichlorobenzene)

Cb H4 C1+ CfiHiCb 9.64 SL 230 1066

(o-Dichlorobenzene)

C6 H4C1+ CeD-jCb 9.06 TC 217 136

(o-Diehlorobenzene)

CeHjCD C6 H4 Cl2 9.12 + 0.01 PI 217* 182

(m-Dichlorobenzene)

CebbCLt CelLCb 8.94 + 0.01 PI 212 * 182

(p-Dichlorobenzene)

C6 H4 CL+ C6 H,Cl2 8.95 PI 212 * 168

(p-Dichlorobenzene)

C6 H4 C1+ CoH4 C12 9.07 TC 215 136

(p-Dichlorobenzene)

CHC1+

CHC1+ CHCb 11.42 ±0.03 PI 239* 182,416

CHC1+ chci3 11.39±0.12 EVD 238 43

C2 HCI3 Heat of formation 216 kcai molh 1

C2 HC13+ C2 HCl3 8.79 s 201 261

C2 HCI3+ C.HCh 9.45 ±0.01 pi 216* 182

C2 HCI3+ C2 HCI3 9.45 pi 216* 168

C2 HCI+ C2 HCb 9.47 ±0.01 pi 217* 416

C.HC1+ C2 HCb 9.94 TC 227 136

C2 H2 C1|

C2 H2 CI+ CHCI2 CHCI2 11. 10 ±0.05 SL 220* 72

CNC1+ CNC1+ CNC1 12.49 ±0.04 SL 321* 73

CFC1+

CFC1+ CFCb Cl, 17.41 ±0.15 RPD 336 185

CFC1+ CFCIj 2C1? 18.8±0.2 RPD 309 185

CFC1+• CHF2 CI H + F? 15.9±0.3 EVD 43

cf2 cf

CF2 C1+ CF:i Cl F 15.0±0.4 SL 161 24

CF3 C1+ cf3 ci+ CF:i Cl 12.91 ±0.03 PI 132* 182

cf3 ci+ CF3 CI 12 . 8 ± 0.2 EVD 129 439

CF3 C1+ CF3 C1 13 ±1 SL 134 24

193
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

C2 F3 C1+

C2 F3 C1+ C2 F3 C1 10.4±0.2 SL 107* 214

c3 f5 ci+

C3 F5 C1+ cf2 cicf=cf2 10.79 VC 1290

c6f5 ci+

ChF5 C1+ CeFsCl 10.4±0.1 SL 301

(Chloropentafluorobenzene)

CFCl£

CFCL+ CFCh Cl 11.97±0.07 RPD 181 185

CF2 C1+

CF2 C1+ CF2 C12 12.31 ±0.05 PI 170* 182

cf2 cl+ cf2 ci2 11.95 TC 162 1164

c2 f2 cij

c2 f2 ci+ c2 f2 ci2 10.0±0.2 SL 214

C4 F6 C1|

c4 f„ci2+ CF3 CC1=CC1CF3 10.36 + 0.01 PI 182

CFCl£

CFC13+ CFCL 11.77 + 0.02 PI 205* 182

C2 F3 Cl£

C2F3 C1+ cf3 cci3 11.78±0.03 PI 182

c2 f3 ci+ cfci2 cf2 ci 11.99 + 0.02 PI 95* 182

cio3 f+

cio3 f+ cio3 f 13.6±0.2 SL 308* 53

POC4

POCL+ POCla ci- 13.3±0.2 NS 232 1101

pocij

POC13+ POCI3 13.1 ±0.2 NS 169 1101

c5 h4 nci+ C5H4NCP C5H4NC1 9.91 ±0.05 SL 255* 217

(2-Chloropyridine)

C5H4NCI+ C5 H4 NC1 10.15 ± 0.05 SL 260* 217

(4-Chloropyridine)

194
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

C«H10 NC1+ C«H4 C1N(CH3 )2 C8 H10 NC1+7.38 CTS 182 1281

(AyV-Dimethyl-p-chloroaniline)

c2 h2 oci+ ch3 coch,ci

c2 h2 oci+ C Hi 1 1.97 ±0.11 VC 186 2174

c2 h2 oci+ ch2 cicochn2 chn2 11.66 ±0.04 VC 2174

C2 H:i OCl+ CHiCOCl

c2 h3 oci+

11.02 ±0.05 PI 196* 182

c2 h3 oci+ ch3 coci 11.08 ±0.06 cs 197 2026

c3 H5 ocl+

C3 H5 OCI+ CH3 C0CH2 C1

Heat of formation 173 kcal mol-1

9.98±0.13 VC 173* 2174

CaHsOCR CH3 C0CH2 C1 10. 00 ± 0.01 cs 174* 2026

c6 h5 oci+ C(i H4 C10H

C6 H5 OCl+

9.28 SL 181* 1066

(o-Chlorophenol)

C6 H5 0C1+ C,jH4 C10H 9.07 SL 175* 1066

(p-Chlorophenol)

Cfi H5 OCl+ OTLCIOH 9.19 TC 178 2194

(Chlorophenol)

c7 h5 oci+ c6 h5 coci

c7 h5 oci+

10.6 SL 216 308

(Benzoyl chloride)

C7 H5 OCI+ CbH,C0C1 9.70±0.01 CS 195* 2026

(Benzoyl chloride)

C7 H5 0C1+ CbH4 C1CH0 9.61 ±0.01 cs 201 * 2026

(p-Chlorobenzaldehyde)

C7 H5 0C1+ CbH.CICHO 9.83 TC 206 2194

(Chlorobenzaldehyde)

C8 H7 OCl+ (tt-Chloroacetophenone) Heat of formation 195 kcal mol 1 C8H7 OCl+ (p-Chloroacetophenone) 190 kcal mol 1 C8H7OCl+ (p-Methylbenzoyl chloride) 187 kcal mol-1

c«h7 oci+ c„h5 coch2 ci 9.44 ±0.05 CS 193* 2025

(a-Chloroacetophenone)

C8 H7 0C1+ Cb H5 COCH2 C1 9.65 ±0.01 cs 198* 2026

(a-Chloroacetophenone)

ChH7 OC1+ CefLClCOCHi 9.47 ±0.05 cs 190* 2026

(p-Chloroacetophenone)

C8 H7 0C1+ CfilLClCOCHi 9.51 TC 191 2194

(Chloroacetophenone)

ChH7 OC1+ CfilL CHiCOCl 9.37 ±0.01 CS 187* 2026

(p-Methylbenzoyl chloride)

C13 H9 OCl+

c13 h9 oci+ c6 h4 cicoc6 h5 9.68 ±0.01 cs 227* 2026

(p-Chlorobenzophenone)

c13 h9 oci+ c6 h4 cicoc6 h5 9.56 TC 224 2194

(Chlorobenzophenone)

195
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c2 h4 o2 ci+

C2 H4 02 C1+ ch,cicooc,h5 c2 h;! 10.97 VC 78 1059

c3h5 o2 ci+

C:t H-,02 Cl+ ch2 cicooch:! 10.53 ±0.05 cs 138* 2025

c8 h7 o2 ci+ Ch H7 02 C1+ C(i H4 CH;t OCOCl 8.87 ±0.05 cs 149* 2026

(p-Methoxybe nzoyl chloride)

ChH7 02 C1+ CB H4 ClCOOCH:i 9.70 TC 147 2194

(Methyl chlorobenzoate) - C7 H4 OCl+

C7 H4 0C1+ CfilLClCOCl 9.58 ±0.03 CS 192* 2026

(p-Chlorobenzoyl chloride)

CHFC1+

CHFC1+ CHF2 C1 F 15.11 ±0.15 EVD 217 43

CHFC1+ chfci2 Cl 12.69 ±0.15 EVD 195 43

c£s-C2 H2FC1+ Heat of formation 191 kcal mol-1

trans-C2 H2 FCl+ 191 kcal mol -1

C2 H2 FC1+ ct5-C2 H2 FCl 9.86 ±0.02 PI 191* 268

c2 h2 fci+ cis-C> H2 FC1 9.87±0.01 PI 192* 182

c,h2fci+ cis- C2 H2 FC1 10. 14 ±0.03 EVD 198 268

c2 h2 fci+ tran5-C2 H2 FCl 9.87 ±0.01 PI 191* 182

c2 h2 fci+ tran5-C2 H2 FCl 9.87 ±0.02 PI 191* 268

c2 h2 fcp rran5-C2 H2 FCl 10.30 ±0.03 EVD 201 268

c-h2 fci+ CHF=CHC1 10.30 PI 268

C6 H4 FC1+

cb h4 fci+ C(i H4 FCl 9.155 ±0.01 PI 180* 182

(o-Chlorofluorobenzene)

ChH4 FC1+ Cb H4 FC1 9.46 ±0.02 EVD 187 1185

(o-Chlorofluorobenzene)

CkFLFCF Cb H4 FC1 9.21 ±0.01 PI 180* 182

(m-Chlorofluorobenzene)

CB H4 FC1+ Cb H4 FC1 9.55 ±0.02 EVD 188 1185

(m-Chlorofluorobenzene)

Cb H4 FC1+ ChILFCI 9.43 ±0.02 EVD 185 1185

(p-Chlorofluorobenzene)

chf2 ci+ CHF2 C1+ CHF.Cl 12.45±0.05 PI 174* 182

chf2 ci+ CHF2 C1 12.69±0.15 EVD 180 43

C2 HF2 CI+ Heat of formation 147 keal mol 1 c2 hf2 ci+ cis-C2 HF,C1 9.86 ±0.02 PI 147* 268

c2 hf2 ci+ cis- C2 HF2 C1 10.17±0.03 EVD 155 268

c2 hf2 ci+ tran5-C2 HF2 Cl 9.83 ±0.02 PI 147* 268

c2 hf2 ci+ /ran5-C 2 HF2 Cl 9.96 ±0.03 EVD 150 268

c2 hf2 ci+ CHF-CFC1 10.43 PI 268

c2 hf,ci+ CHF=CFC1 10.82 PI 268

196
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Ion Reactant

Other

products

APorIP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C2 H3 F2 C1+

CsHaFaCl* CH3 CF2 C1 11.98±0.01 PI 182

c4 h2 f7ci+

C4 H2 F7 C1+ n-C3 F7 CH2 Cl 11.84 ±0.02 PI 182

CHFC1+

CHFCL+ CHFC12 12.39 ±0.20 EVD 217* 43

C2 H«SiCl+

C2 H6 SiCl+ (CH3 )3 SiCl ch3 11.00 ± 0.16 RPD 136 1421

C3 H9 SiCl+

C3 H9 SiCl+ (CfUSiCl 10.58 ±0.04 RPD 160* 1421

CH3 SiClJ

CH3 SiCl+ CHaSiCh 11.36±0.03 SL 136* 2182

C2 H3 SiCl+

C2 H3 SiCl3+ CH^CHSiCh 10.79±0.02 PI rH CO * 182

C2 H5 SiCl+

CaHsSiClJ c2 H5 sia3 10.74 ±0.04 SL 117* 2182

C3 H7 SiCl+

C3 H7 SiClJ iso- C3 H7 SiCh 10.28±0.1 SL 99* 2182

C4 H3 C1S+

C4 H3C1S+ C4 H3 C1S 8.68 ±0.01 PI 217* 182, 416

(2-Chlorothiophene)

c3h3n2 oci+

C3 H3 N2 0C1+ ch2 cicochn2 9.92 ±0.1 VC 2174

c7 h4 no3 ci+

C7 H4N03 C1+ c«h4 no2 coci 10.66 ±0.01 cs 219* 2026

(p-Nitrobenzoyl chloride)

c3hn2oci+

C3 HN2 OClJ CChCOCHN, 9.95 ±0.06 VC 2174

K+ Heal of formation 121 kcal mol -1

K+ K 4.341 s 121* 2113

K+ KI I 8.6±0.3 VC 2001

197
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

Ca+ Heat of formation 187 kcal mol-1

Ca+ Ca 6.113 S 187* 2113

Ca+ Ca 6.0±0.5 VC 184 1297

Ca+ Ca 5.9±0.2 VC 182 2141

Ca+ Ca 6.1 ±0.2 NS 187 2178

Ca+2 Heat of formation 461 kcal mol 1

Ca+2 Ca 17.98 s 461* 2113

Ca+2 Ca 28.5 ±2 NS 703 2178

CaO+

CaO+ CaO 6.5 LE 163 1244

CaO+ CaO 6.5 LE 163 2123

CaF+ Heat of formation 75 kcal mol-1

CaF+ CaF 6.0 + 0.5 VC 74* 2141, 1297

CaF+ CaF 5.5±0.3 VC 63* 2165

CaF+ CaF 5.8 + 0.3 VC 70* 2165

CaF+ CaF-. F 12.5±0.8 VC 81* 2141, 1297

CaF+ CaF, F 12.5 VC 81* 2165

Sc+ Heat of formation 242 kcal mol-1

Sc+ Sc 6.561 s 242* 2113

Sc+ ScF3 3F? 28.0 VC 310 2009

ScF+

ScF+ ScF§ 2F? 16.0 VC 52 2009

ScFj

ScF7 ScF3 F? 13.5 VC 13 2009

Y+ Heat of formation 275 kcal mol -1

V+ V 6.740 s 275* 2113

v+ C5 H5 V(CO)4 19.4±0.4 EVD 1381

(Cyclopentadienylvanadium tetracarbonyl)

c3h3v+ c3 h3 v+ C3 H5 V(CO)4 C,H2 + 4CO? 18.9 ± 0.3 EVD 307 1381

(Cyclopentadienylvanadium tetracarbonyl)

c5 h5v+

c5 h5 v+ C3 H3 V(CO)4 4C0 14.2±0.2 EVD 253 1381

(Cyclopentadienylvanadium tetracarbonyl)

c6h5 ov+

c«h3 ov+ C5 H5 V(CO)4 3C0 10.7 ±0.3 EVD 146 1381

(Cyclopentadienylvanadium tetracarbonyl)

198
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

c7 h5 o2v+

c7 h5 o,v+ C5 H5 V(CO)4 2CO 9.7 ± 0.3 EVD 97 1381

(Cyelopentadienylvanadium tetracarbonyl)

c9h5 o4v+

Cc,H.-,04 V+ C5 H5 V(CO)4 8.2 ± 0.3 EVD 9* 1381

(Cyelopentadienylvanadium tetracarbonyl)

Cr+ Heat of formation 251 kcal mol -l

Cr+ Cr 6.765 S 251* 2113

Cr+ Cr 6.7 ± 0.3 VC 249 1249

Cr+ Cr(CO)n 6C0 17.7 + 0.3 EVD 326 1107

Cr+ Cr(CO)« 6C0 14.7 + 0.1 cs 257 2023

Cr+ CrO,F, 30.8 + 0.2 LE 30

Cr+ CrO, Cl2 26.7 + 0.2 LE 30

CrO+

CrO+ CrO 8.4 ± 0.5 LE 247 2130

CrO+ CrO, 0 13.5 LE 239 2130

CrO+ CrO,F, 0 + 2F? 24.4 + 0.2 LE 30

CrO+ CrO,Cl2 0 + 2C1? 21.4 + 0.2 LE 247 30

CrOj

CrO+ CrO-, 10.3 + 0.5 LE 225 2130

CrOf Cr02 F2 f2 19.8 + 0.2 LE 30

CrOi CrO.Cb Cl2 15.2 + 0.5 LE 222 30

CrOj

CrOj Cr03 11.6 + 0.5 LE 200 2130

CrF+

CrF+ CrF 8.4 ± 0.3 VC 201 1249

CrF+ CrO,F2 20+ F? 21.7 + 0.4 LE 30

CrFj

CrF-t CrF, 10.1 + 0.3 VC 134 1249

CrF^ CrO,F2 20? 14.8 + 0.2 LE 30

CrCl+

CrCl+ Cr02 Cl2 20+ Cl? 22.2 + 0.2 LE 235 30

CrClJ

CrCl2+ Cr02 Cl2 20? 18.2 + 0.2 LE 172 30

CrCO+

CrCO+ Cr(CO),i 5C0 14.9 + 0.2 EVD 235 1107

CrCO+ Cr(CO)fi 5C0 13.3 + 0.2 CS 198 2023

199
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

CrC2 0+

CrC2 0^ Cr(CO)t; 4CO 13.1 ±0.2 EVD 167 1107

CrCjO-t Cr(C0)K 4CO 11.56 + 0.2 cs 132 2023

CrCsOj

CrC3 Oj Cr(CO)« 3CO 10.62 + 0.15 cs 84 2023

CrC4 Oj

CrC^Oj- Cr(CO)« 2CO 9.97 + 0.04 cs 42 2023

CrC5 0+

CrC.%0^ Cr(CO)« CO 9. 17 ±0.04 cs -3 2023

CrCeOjt Heat of formation — 55 kcal mol 1

CrCt;Oj Cr(CO)« 8.03 + 0.03 PI — 55* 1167

CrC«0^ Cr(CO),; 8.15±0.17 EVD -52 1107

CrCfiO^ Cr(CO)H 8.18 + 0.07 CS -52 2023

CrOF+

CrOF+ Cr02 F2 0 + F? 19.8 + 0.2 LE 30

Cr02 F+

CrO>F+ CrO,F2 F 16.3±0.3 LE 30

CrOF+

CrOFj Cr02F2 0 16.8±0.4 LE 30

Cr02 FJ

CrCLFt Cr02F2 14.0±0.2 LE 30

CrOCF

CrOCP Cr02 Cl2 0+C1? 17.0±0.3 LE 175 30

Cr02 Cl+ Cr02 Cl+ Cr02 Cl2 Cl 13.9±0.3 LE 163 30

CrOCl+

CrOCl2+ Cr02 Cl2 0 15.8±0.2 LE 176 30

Cr02 Cl+

CrO.Cl^ Cr02 Cl2 12.6±0.3 LE 162 30

200
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

Mn+ Heat of formation 240 kcal mol -l Mn+ Mn 7.434 S 240* 2113

Mn+ Mn 7.7±0.3 VC 246 2161

Mn+ C5 H5 Mn(CO):i 15.9±0.3 EVD 1381

(Cyclopentadienylmanganese tricarbonyl)

MnF+

MnF+ MnF 8.7±0.3 VC 187 2161

MnF+ MnF2 F 14.5 VC 202 2161

MnF£

MnFj MnF2 11.5±0.3 VC 152 2161

CH5 Mn

C5H5Mn+ C5 H-,Mn(CO)3 3C0 12.0±0.3 EVD 248 1381

(Cyclopentadienylmanganese tricarbonyl)

C6H5 OMn+

C6 H5 OMn+ CsHaMnlCOb 2C0 9.8 ±0.3 EVD 171 1381

(Cyclopentadienylmanganese tricarbonyl)

C8 H5 03 Mn+

CKH5 0,-iMn + CsHaMnlCOb 8.3±0.4 EVD 83* 1381

(Cyclopentadienylmanganese tricarbonyl)

Fe+ Heat of formation 282 keal mol -l

Fe+ Fe 7.90±0.01 S 282* 2113

Fe+ FeF2 f2 16.5±0.3 VC 287 1280

Fe+ FeCl2 2C1 16.5±0.5 LE 287 397

Fe+ FeBr2 2Br 16.6 + 0.5 LE 318 174

Fe+ Fe(C0)5 5C0 16.1 ±0.2 EVD 328 112

Fe+ Fe(CO)5 5C0 14.7±0.1 cs 296 2023

FeF+

FeF+ FeF2 F 12.6 ±0.3 VC 179 1280

FeF+

FeF$ FeF2 11.3±0.3 VC 167 1280

FeCl+

FeCl+ FeCl2 Cl 12.8±0.5 LE 231 397

FeClJ

FeCl2+ FeCl, 11.5 ± 0.5 LE 230 397

Fe2 Cl+

Fe2 Cl^ Fe2 CL Cl 12. 0± 1.0 LE 143 397

201
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

Fe2 Cl+

Fe2Cl+ Fe-iCR 10.5± 1.0 LE 137 397

FeCO+ FeCO Fe(CO)5 4C0 14.0±0.2 EVD 253 112

FeCO Fe(C0)5 4C0 12.9±0.1 cs 228 2023

FeCO 2 FeC0+2 Fe(C0)5 4C0 30.2 ±2 EVD 627 112

FeC2 0+

FeC2 0+ Fe(C0b 3C0 11.8±0.2 EVD 176 112

FeC2 0^ Fe(C0)5 3C0 10.92 ±0.04 CS 156 2023

FeC3Oj

FeC3 0+ Fe(C0)5 2C0 10.3±0.3 EVD 115 112

FeC3 0+ Fe(C0)5 2C0 9.89 ±0.05 CS 106 2023

FeC4 0+

FeC4 0j Fe(CO)5 CO 10.0±0.2 EVD 82 112

FeC4 0+ Fe(C0)5 CO 8.34 ± 0.12 CS 43 2023

FeC5 0+ Heat of formation 8 kcal mol -1

FeCsOf Fe(C0)s 7.95 ±0.03 PI 8* 1167

FeC3 0.+ Fe(C0)5 8.53 ±0.2 EVD 21 112

FeCsO+ Fe(C0)5 8.14±0.06 CS 12 2023

Co+ Heat of formation 283 kcal mol"-1

Co+ Co 7.87 ±0.02 s 283* 2113

Co+ C5 HgCo(CO>2 16.8±0.3 EVD 1381

(Cyclopientadienylcobalt dicarbonyl)

C3 H3 C0

+

C3 H,3 Co+ C5 H5 Co(CO)2 16.8±0.3 EVD 1381

(Cyclopentadienylcobalt dicarbonyl)

C5 H5 Co+

C5 H5 Co+ C5 HoCo(CO)2 2C0 11.7 ±0.2 EVD 267 1381

(Cyclopentadienylcobalt dicarbonyl)

CoCO+ CoCO CsHoColCOb 16.5 ± 0.4 EVD 1381

(Cyclopentadienylcobalt dicarbonyl)

202
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

C6 H5 OCo+

Cfi H,OCo+ C5 H5 Co(CO>2 CO 10.1 ±0.2 EVD 203 1381

(Cyclopentadienylcobalt dicarbonyl)

C7 H5 02 Co+

C7 H.,0>Co+ Cs H5 Co(CO>2 8.3±0.2 EVD 135* 1381

(Cyclopentadienylcobalt dicarbonyl)

Ni+ Heat of formation 279 kcal mol -l

Ni+ Ni 7.635 S 279* 2113

Ni+ Ni 7.5± 0.5 LE 276 2125

Ni+ Ni 7.6 ±0.3 NS 278 2188

Ni+ NiF2 2F 16.7 ±0.3 VC 271 2162

Ni+ NiCl2 2C1 15.7 ± 0.5 LE 277 2125

Ni + Ni(C0)4 4C0 16.0 ±0.3 EVD 331 112

NiO+

Ni0+ NiO 9.5 ±0.3 NS 295 2188

NiF+

NiF+ NiF2 F 13.0 ±0.3 VC 205 2162

NiF+

NiF+ NiF2 11.5 ± 0.3 VC 189 2162

NiCl+

NiCl+ NiCl 11.4 ± 0.5 LE 278 2125

NiCl + NiCl2 Cl 12.7 ± 0.5 LE 237 2125

NiCU

NiCl+ NiCl2 11.2 ± 0.5 LE 231 2125

NiCO+

NiC0+ NUCOh 3C0 13. 5± 0.2 EVD 246 112

NiC2 0+

NiC2 0+ Ni(C0)4 2C0 10.7 ± 0.2 EVD 155 112

NiC2 0|

2

NiC2 0+ 2 Ni(C0)4 2C0 28. 3± 1 EVD 561 112

N1C3O+

NiC3 03+ Ni(C0)4 CO 9.36 ±0.15 EVD 98 112

NiC4 0+ Heat of formation 47 keal mol 1

NiC4 0+ Ni(C0)4 8.28 ±0.03 PI 47* 1167

NiC4 0+ Ni(C0)4 8.64 ± 0.15 EVD 55 112

203
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

Cu+ Cu

Cu+ Heat of formation 259 kcal mol

7.726

-1

S 259* 2113

Cu+ CuF2 2F 16.5+0.3 VC 274 1458

CuF+ CuF

CuF+

8.6 ±0.3 VC 210 1458

CuF+ CuF2 F 12.4 + 0.3 VC 198 1458

CuF+ CuF>

CuF+

11.3 + 0.3 VC 192 1458

Ge+ Ge

Ge+ Heat of formation 272 kcal mol

7.89

1

s 272* 2113

Ge+ GeR 2R 10.7 ± 0.2 LE 269 2116

Ge+ GeR R+ 2H 14.1 ±0.5 LE 243 2116

Ge+ GeH4 4H 18.3 ±0.3 LE 235 2116

Ge+ Ge2 R Ge + 3R? 13.3±0.3 LE 256 2133

Ge+ Ge3 R 2Ge + 4R? 16.3±0.3 LE 250 2133

Ge+ GeO 0 14.0 ± 1 LE 252 1255

Ge+ GeTe Te 12.6±0.5 NS 286 1023

Ge+ (CRhGe 4CR 19.2 ±0.5 EVD 275 83

GeJ Ge2 H6

Ge^

3R? 13.1 ±0.3 LE 341 2133

Ge+ Ge3 R Ge + 4R ? 15.8±0.3 LE 329 2133

GeJ Ge3 R

Ge£

4R 14.6 ±0.3 LE 391 2133

GeH+ GeR,

GeH+ R + H 11.3 ±0.3 LE 230 2116

GeH+ GeR 3H 16.8±0.3 LE 253 2116

GeH+ GeR

GeH+

h2 11.8±0.2 LE 294 2116

GeH+ GeR 2H 15.4 ±0.3 LE 273 2116

GeH+ GeR

GeH+

H 10.80 ±0.07 LE 219 2002,2116

GeH+ Ge2 R GeR 10.26±0.10 LE 237 2002

GeH+ GeSiR SiR 11.32 ±0.14 LE 2002

Ge2 H+ Ge2 R

Ge2 H+ 2R + H 13.0 ±0.3 LE 286 2133

Ge2 H+ Ge2 Hfi

Ge2 H+

2R 12.9±0.3 LE 336 2133

204
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

Ge2 Hj

Ge2 H+ Ge2 H8 h2 + h 12.8 ±0.3 LE 282 2133

Ge2 Hj

Ge2 H+ Ge2 He h2 12.7±0.3 LE 332 2133

Ge2 H+

Ge2 H+ Ge2 H6 H 12.6±0.3 LE 277 2133

Ge2 Hg

Ge2 Hg Ge2 He 12.5±0.3 LE 327 2133

Ge3 H+

Ge3 H+ Ge3 H8 3H2 +H 11.8±0.3 LE 274 2133

GesHj

Ge.{H2+ Ge3 H8 3H2 10.7 ±0.3 LE 301 2133

Ge3 H+

Ge3 Hg Ge3 H8 2H2 + H 10.6±0.3 LE 247 2133

Ge3 H+

Ge3H+ Ge3 H8 2H, 10.4±0.3 LE 294 2133

Ge3 H+

Ge3 H; Ge3 H8 h2 + h 10.1 ±0.3 LE 235 2133

Ge3 Hg

Ge3 Hg Ge3 H8 h2 10.0±0.3 LE 285 2133

Ge3 H+

Ge3 H+ Ge3 H8 H 9.9 ±0.3 LE 230 2133

Ge3 Hg

Ge3 H+ Ge3 H8 9.6±0.3 LE 276 2133

GeO+

Ge0+ GeO 10.1 ±0.8 LE 222 1255

Ge2 0+

Ge2 0+ Ge>02 0 14.3 ±1.0 LE 158 1255

205

323-656 0- 69—14
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

Ge2Oj

Ge2 0.7 Ge2 02 8.7 ±1.0 LE 89 1255

Ge3Oj

Ge3 0j Ge.3O.-i 8.6 ±1.0 LE -14 1255

CH3 Ge+ CH3 Ge+ (CH3 )4 Ge 3CH3 16.8 + 0.4 EVD 253 83

C2 He Ge+

C2 HK Ge+ (CH3 )4 Ge 2CH3 14.1 ±0.2 EVD 224 83

C3 H9 Ge+

C;iHH Ge+ (CH3 )4 Ge ch3 10.2 + 0.1 EVD 167 83

C4 H12 Ge+

C4 Hi 2 Ge+ (CH3 )4 Ge 9.2 ± 0.2 EVD 177* 83

GeSiH^

GeSiH,f GeSiHe 10.20 ±0.03 LE 263 2002

As+ Heat of formation 299 kcal mol 1

As+ As 9.815 S 299* 2113

As+ AsH3 h2 + h 14.8 ±0.2 LE 305 2116

As+ AsH3 3H 19.4 ± 0.2 LE 307 2116

As+ AS2H4 As + 2H2 14.3±0.3 LE (a) 2133

As+

As+ As2 H4 2H2 13.0±0.3 LE 341 2133

AsJ

As+ As4 9.07 ±0.07 SL 244* 1047

AsH+

AsH + AsH3 h2 12.4±0.2 LE 302 2116

AsH+ AsH3 2H 16.8 ± 0.4 LE 299 2116

AsUi

AsH+ AsH3 H 14.5±0.2 LE 298 2116

AsHj Heat of formation 247 keal mol-1

AsH+ AsH3 10.03 PI 247* 1091

AsH+ AsH3 10.6±0.1 EVD 260 1007

AsH.+ AsH, 12.1 ±0.2 LE 295 2116

206
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

APorIP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

As2 H+

As2 H+ As2 FLi h2 + h 12.7 ± 0.3 LE 282 2133

AS2 H9

As2 H+ As2 Ri h2 12.6 ± 0.3 LE 332 2133

As2 H£

As2 H+ AS2 H4 H 12.5±0.3 LE 277 2133

As2H^

a&2 h+ As2 H3 12.2 ±0.3 LE 323 2133

AsClg

AsCl^ AsCla 11.7 + 0.1 EVD 208* 1007

CH5As+

CHsAs+ CH3 AsH2 9.7 ±0.1 EVD 1007

C2 H7 As+

C2 H-As+ (CH3 )2 AsH 9.0±0.1 EVD 1007

C3 H9As+

C3 Hh As+ (CH3 )3 As 8.3 ±0.1 EVD 195* 1007

Ci8HisAs+

CihHi5As+ (Cells )3 As

(Triphenylarsine)

7.34 ±0.07 PI 269* 1140

C3 F9As+

C3 Fs,As + (CF3 )3 As 11 . 0 ± 0.1 EVD 1007

C3 H6 F3As+

C3 H«F3 As+ (CH3 )2 AsCF3 9.2 ±0.1 EVD 1007

C2 HF6As+

C2 HFh As+ (CF3 )2 AsH 10.9 ±0.1 EVD 1007

C3 H3 F6As+

C3 H3F6As+ (CF3 )2 AsCH3 10.5±0.1 EVD 1007

C2 H6 C1As+

C2 H6 C1As+ (CH3 )2 AsC1 9.9±0.1 EVD 1007

CH3 C12 As+ CH3 C12 As+ CH3 AsC12 10.4±0.1 EVD 1007

207
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C2 F6C1As+

C2 F6 C1As+ (CF3 )2 AsCl 11.0±0.1 EVD 1007

Se+ Heat of formation 279 kcal mol-1

Se+ Se 9.752 S 279* 2113

Se+ SnSe Sn 12.7 ±0.5 LE 251 2063

Br+ Heat of formation 300 keal mol -l

Br+ Br 11.85 S 300* 2113

Br+ Br2 Br- 10.38 ±0.05 RPD 302 292

Br+ Br2 Br" 12.30± 0.06 RPD 292

Br+ Br2 Br 14.31 ±0.03 RPD 311 292

Br+ Br2 Br 15.88 ±0.04 RPD 292

Br+ Br2 Br 17.06 ±0.04 RPD 292

Br+ Br2 Br 17.97 ±0.06 RPD 292

BF Br2 Br 19.98 ±0.06 RPD 292

Br+ CBr4 18.1 ±0.2 EVD 1246

Br+ CBr4 21.4 ± 0.6 EVD 1246

Br+ MgBr2 MgBr 16 ± 1 NS 307 178

Br+ CH3 Br CH-? 13.8 ±0.05 RPD 2154

Br+ CH3Br CH3 14.7 ±0.05 RPD 297 2154

Br+ CH3 Br ch3 16.6 ±0.05 RPD 2154

Br+ CH3 Br ch3 17.6 ± 0.05 RPD 2154

Br+ CH3Br ch3 18.5±0.05 RPD 2154

Br+ C2 H5 Br ch3 ±ch2 18.6±0.3 VC 287 356

Br+ CH3 C=CBr c3 h3 16.0±0.5 VC (b) 13

Br+ CNBr CN- 1 1 .9 ± 0.2 SL 73

Br+ CNBr CN 16.2 ±0.1 SL 318 73

Br+ CF3 Br cf3 16.7 ±0.1 EVD 346 439

Br+ CF3Br cf3 17.6 ± 1 SL 366 24

Br+ CF3 Br CF2 + F 21.0± 0.2 LE 347 439

Br+ (

2 Il3/ 2s) Heat of formation 250 keal mol 1 Br+ (2 n1/2g) 261 keal mol -1

Br+(2 n3/ 29 ) Br2 10.53 ±0.03 PI 250* 213

Br+(2 n3/ 2ff ) Br2 10.55 ±0.02 PI 251* 182, 416

Br+(2 n,/2 «,) Br2 11.0±0.1 PI 261* 213

Br+(2 Il3/ 29) Br2 10.69 ±0.03 RPD 254 292

Br+( 2 n1/2g) Br2 11.05 ±0.05 RPD 262 292

Br+(2 fl3/ 2g) Br2 11.97 ± 0.03 RPD 283 292

Br+(2 rii/2 U ) Br2 12.36 ±0.04 RPD 292 292

Br+(2 S+) Br2 13.72 ±0.04 RPD 324 292

Br+ Br2 10.58±0.08 SL 251 75

Br+ Br2 10.7 ±0.3 VC 254 357

Br+ MgBr2 Mg 17 ± 1 NS 282 178

Br+2 Br2 30.0 NS 692 75

HBr+

HBr+ HBr 11.62±0.01 PI 259* 182, 416

208
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other APorIP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

DBr+ 2

DBr+2 DBr 33.2 ±0.3 FDP 212

LiBr+

LiBr+ LiBr 9.4 VC 182 2179

Li2 Br+

Li2 Br+ Li2 Br2 Br 9.9 VC 84 2179

BBr+

BBr+ BBr 10.7 ±0.2 VC 206

BBr+ BBr 11.8±0.2 VC 206

BBr+ BBr3 Br2 ? 15.0 ± 0.2 VC 289 206

BBrJ

BBr+ BBr3 Br 10.7 ± 0.2 VC 171 206

BBr+ BBr3 Br 10.8 ± 0.2 VC 173 206

BBr.+ BBr3 Br 11.0±0.2 VC 178 206

BBrJ

BBr+ BBr3 9.7 ± 0.2 VC 175 206

CBr+

CBr+ CBr 10.43 ±0.02 NS 374 129

CBr+ CBr4 Br2 +Br? 17.5 ± 0.2 EVD 388 1246

CBr+ CBr4 3Br 19.5 ± 0.4 EVD 388 1246

CBr+ CBr4 Br2 + Br? 16.35 ±0.13 NS 362 129

CBr+ CNBr N 17.4 ± 0.2 SL 333 73

CBrJ

CBr+ CBr2 10.11 ±0.09 NS 328 129

CBri CBr4 Br2 14.6 ±0.3 EVD 348 1246

CBr+ CBr4 2Br 16.2 ±0.4 EVD 339 1246

CBr+ CBr4 Br2 12.30±0.08 NS 295 129

CBrJ

CBr 3 CBr4 Br 11.3±0.2 EVD 253 1246

CBr 3 CBr4 Br 9.95 ±0.05 NS 222 129

CBr|

CBr+ CBr4 11.0±0.5 EVD 273 1246

BrF+

BrF+ BrF5 20 VC 357

BrF+

BrF+ BrF3 F 13.5 ±0.3 VC 231 357

BrF+ BrF5 f2 +f? 16.1 ±0.2 VC 250 357

209
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

BrFj

BrF+ BrF3 12.9 + 0.3 VC 236 357

BrF+3 BrF5 f2 15.5 + 0.2 VC 255 357

BrFt

BrF+ BrF5 F 14.0 + 0.3 VC 202 357

MgBr+

MgBr+ MgBr2 Br 12.0 + 0.4 VC 175 178

MgBr+ MgBr2 Br 13.6 + 0.4 VC 212 178

MgBrJ

MgBr+

2 MgBr2 10.65 + 0.15 VC 171* 178

Mg2 Br+

Mg2 Br+ Mg2 Br4 Br 10.8 + 0.3 VC 35 178

BrCl+

BrCl+ BrCl 11.1 ±0.2 VC 259* 357

FeBr+

FeBr+ FeBr2 Br 12.9 ± 0.5 LE 260 174

FeBrJ

FeBrJ FeBr2 10.7 ± 0.5 LE 236 174

Fe2 Br+

Fe2 Br+ Fe2 Br4 Br 13.6±0.5 LE 224 174

Fe2 Br+

Fe2 Br+

4 Fe2 Br4 12.6 + 0.5 LE 228 174

B5 F[8Br+

B5 H8Br+ B5H8Br 9.5±0.1 EVD 1102

CH2 Br+

CH>Br+ CH.Br 9.30 SL 261 141

CH2 Br+ CH.Br 8.34 ±0.11 NS 239 131

CH,Br+ CH3 Br H-? 13.0 RPD 258 160

CH,Br+ CH:s Br H-? 14.3 RPD 160

CH2 Br+ CH3 Br H 12.12± 0.09 RPD 219 1139

CH2 Br+ CH,3 Br H 13.6 RPD 253 160

CH,Br+ CH,jBr H 15.0 RPD 160

CH2 Br + CHsBr H 13.4 + 0.2 VC 249 356

CH,Br+ C.H5 Br CHi 14.1 + 0.1 VC 277 356

CH,Br+ CH.Br, Br 10.93± 0.04 NS 224 131

210
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

CH3Br+

(

2 Ei/2 ) Heat of formation 234 kcal mol 1 CH3 Br+ (

2 E3/2 ) 242 kcal mol 1 CH3 Br+(2 E1/2 ) CH.3 Br 10.541 ±0.003 s 235* 2064

CH3 Br+(2 Ei/2 ) CHsBr 10.528 ±0.005 PI 234* 1253

CH3 Br+(2 Ei/2 ) CH.3 Br 10.53 ±0.01 PI 234* 182,416

CH3 Br+(2 E1/2 ) CHsBr 10.53 ±0.02 RPD 234 289

CH3 Br+(2 E3/ 2 ) CH3 Br 10.856 ±0.003 S 242* 2064

CH3 Br+(2 E3/2 ) CHsBr 10.857 ±0.010 PI 242* 1253

CHsBr +

( 2 E3/ 2 ) CH3 Br 10.8 ±0.05 RPD 241 2154

CH-jBr+PEg/u) CH,3 Br 10.85 ±0.03 RPD 242 289

CH3Br+ CH.jBr 11. 5 ±0.05 RPD 2154

CH3 Br+ CH3 Br 11. 62 ±0.04 RPD 289

dEBr* CH3 Br 12.9 ±0.05 RPD 2154

CH3Br+ CH3 Br 12.94 ±0.05 RPD 289

CH3Br+ CHgBr 19.13± 0.15 RPD 289

C2 H2 Br+

C2 H2 Br+ cts-C2 H2 Br2 Br 11.44 ±0.05 SL 260 114

C2 H2 Br+ trans-C2 H-2 Br2 Br 1 1 .65 ± 0.05 SL 264 114

C2 H3 Br+ Heat of formation 243 kcal mol 1 C2 H3 Br+ QHaBr 9.80 ±0.01 PI 243* 182

C2 H3 Br+ C2 H3 Br 9.80 PI 243* 168

C2 H3 Br+ C.HaBr 9.82 ± 0.02 PI 243* 268

C2 H3 Br+ C2 H3 Br 10.300 PI 268

C2 H3Br+ C2 H3 Br 9.97 ±0.05 EVD 247 268

C2 H5 Br+

(

2 Ei/2 ) Heat of formation 222 kcal mol 1 C2 H5 Br+

(

2 E3/ 2 ) 229 kcal mol 1 C2 H5 Br+(2 Ei/2 ) C2 HsBr 10.29 ±0.02 S 222* 2065

C2 H5 Br+(2 E1/2 ) C2 H5 Br 10.29± 0.01 PI 222* 182,416

C2 HsBr+

( 2 E3/ 2 ) C2 H5 Br 10.61 ±0.02 s 229* 2065

C2 H5 Br+

( 2 E3/ 2 ) C.HsBr 10.7 RPD 231 160

C2 H5 Br+ C2 H5 Br 11.1 RPD 160

C,HsBr+ C2 H5 Br 12.3 RPD 160

C2 H5 Br+ C2 H5 Br 13.1 RPD 160

C2 H,Br+ C2 H,Br 10.7 ±0.1 VC 231 356

C2 H5Br+ C2 H5 Br 11.1 TC 2038

C2 H,Br+ C2 H5 Br 12.2 TC 2038

C2 R,Br+ C2 H,5 Br 13.2 TC 2038

C3 H,Br

C3 H3Br+ CH3 C=CBr 10.1 ±0.1 VC 282* 13

C3 H5 BrC3 HkBr+ CH3 CH=CHBr 9.30 ±0.05 PI 224* 182

211
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-1

) n-C3 H7Br+

(

2 E1 / 2 ) Heat of formation 216 kcal mol-1

iso-C3 H7 Br+ 208 kcal mol 1 C3 H7 Br+

( 2 Ei/2 ) n-C3 H-Br 10.18± 0.01 PI 216* 182

C3 H7 Br+(2 E3/ 2 ) n-C3 H7 Br 10.55 RPD 225 160

C3 H7 Br+ n-C3 H-Br 10.8 RPD 160

C3 H7 Br+ n-C3 H7 Br 11.4 RPD 160

C3 H-Br+ n-C3 H-Br 12.1 RPD 160

C3 H7 Br+ n-C3 H7 Br 12.9 RPD 160

C3 H-Br+ n-C3 H7 Br 10.8 TC 2038

C3 H7 Br+ n-C3 H7 Br 11.7 TC 2038

C3 H7 Br+ n-C3 H7 Br 12.4 TC 2038

C3 H7 Br+ n-C3 H7 Br 13.2 TC 2038

C3 H7 Br+ iso-C3 H7 Br 10.075 ±0.01 PI 208* 182

C3 H7 Br+ t50-C3 H7 Br 11.0 TC 2038

C3 H7 Br+ i5o-C3 H7 Br 11.2 TC 2038

C3 H7 Br+ i5o-C3 H7 Br 12.7 TC 2038

C3 H7 Br+ i5o-C3 H7 Br 13.2 TC 2038

C4HgBr+

C4 H9 Br+ n-C4 H9 Br 10.125±0.01 PI 208* 416. 182

C4 H9 Br+ 5ec-C4 H9 Br 9.98 ±0.01 PI 206* 182

C4 H9 Br+ j 50 -C4 H9 Br 10.09 ±0.02 PI 208* 182

C4 H9 Br+ tert-C4 H9 Br 9.89 ±0.03 PI 201* 182

C5 H4Br+ C5 H4 Br+ C5 H4 Br 8.85 SL 126

(Bromocyclopentadienyl radical)

C5 HnBr+ C5 HnBr+ n-CsHuBr 10. 10 ±0.02 PI 205* 182

C6 H5 Br^

C6 H5 Br+ C6 H5 Br 8.98 ±0.02 PI 231* 182,416

(Bromobenzene)

C6 H5Br+ C6 H5 Br 9.52 SL 244 1066

(Bromobenzene)

C6 H5Br+ CH H5 Br 10.05 ±0.1 SL 256 301

(Bromobenzene)

C7H-Br+

C-H7 Br+ C6 H5 CH2 Br 9. 10 ±0.05 CS 229* 2025

(Benzyl bromide)

C7 H7 Br+ C«H4 BrCH3 8.78 ±0.01 PI 218* 416,182

(o-Bromotoluene)

C7 H7 Br + C6 H4 BrCH3 8.81 ±0.02 PI 218* 182

(m-Bromotoluene)

C7 H7 Br+ C6 H4 BrCH3 8.67 ±0.02 PI 215* 182.416

(p-Bromotoluene)

C7 H7 Br+ CsIRBrCHs 9.22 SL 228 1066

(p-Bromotoluene)

C7 H-Br+ C6 H4 BrCH3 9.17 TC 226 2194

(Bromotoluene)

212
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol - x ) CHBrJ

CHBr+ CHBr2 8.13 ± 0.16 NS 238 131

CHBr+ CHBr3 Br 10.80± 0.01 NS 226 131

CH2 Br+

CH2 Br+ CH,Br2 10.49 ±0.02 PI 241* 182

cis-C2 H2 Br+ Heat of formation 241 kcal mol 1 trans-C2 H2 Br+ 240 kcal mol 1 C2 H2 Br+ ct5-C2 H2 Br2 9.45 ±0.01 PI 241* 114,1058,

1190,268

C2 H>Br+ «'s-C2 H2 Br2 9.45 PI 241* 168

C2 H2 Br+ ct5-C2 H2 Br2 9.69 ±0.05 EVD 246 114,268,

1058. 1190

C2 H2 Br+ fra«5-C2 H2 Br2 9.46 ±0.01 PI 240* 114, 1058,

1190, 268

C2 H2 Br+ fran5-C2 H2 Br2 9.47 PI 240* 168

C2 H2 Br+ frans-C2 H2 Br2 9.54 ±0.05 EVD 242 114,268,

1058, 1190

C2H2 Br+ CHBi=CHBr 9.45 ±0.01 PI 182

C2 H2 Br+ CHBi=CHBr 9.84 PI 268

C2 H4 Br+

C2H4 Br+ CH3 CHBr2 10.19 ±0.03 PI 228* 182

CsHgBr^

C3 H6 Br+ 1 ,3-C3 H«Br2 10.07 ±0.02 PI 221* 182

CHBr+

CHBr+ CHBr3 10.51 ±0.02 PI 246* 182

C2 HBr+

C2 HBr+ C2 HBr3 9.27 ±0.01 PI 240* 182

C2 HBr+ C2 HBr3 9.27 PI 240* 168

CNBr+ CNBr+ CNBr 11.95 ±0.08 SL 320* 73

CF2 Br+ CF2 Br+ CF3 Br F 15.0±0.1 EVD 173 439

CF2 Br+ CF3 Br F 15.0±0.7 SL 173 24

CF3 Br+ Heat of formation 121 kcal mol 1 CF3 Br+ CF3 Br 11.82 ± 0.02 EVD 119* 439

CF3 Br+ CF3 Br 11. 89 ±0.10 SL 121* 1131

CF3 Br+ CF3 Br 11.97 ±0.08 SL 122* 1131

CF3 Br+ CF3 Br 12.3 ±0.3 SL 130 24

213
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

C6 F5Br+ C6 F5 Br

(Bromopentafluorobenzene)

C6 F5 Br+

9.6±0.1 SL 301

CF,Br+ CF2 Br2 CF2 Br+11.07 ±0.03 PI 182

CFBr+ CFBr3

CFBr+

10.67±0.01 PI 182

C5 H4 NBr+

C5 H4 NBr+ CsIRNBr 9.65 ±0.05 SL 261* 217

(2-Bromopyridine)

C5 H4 NBr+ QILNBr 9.94 ±0.05 SL 267* 217

(4-Bromopyridine)

CgHioNBr+ C«H10 NBr+ C6 H4 BrN(CH3>2 7.33 CTS 193 1281

(AL/V-Dimethyl-p-bromoaniline)

C10H14 NBr+

C10 Hi 4 NBr+ C6 H4BrN(C2 H5)2 6.96 CTS 175 1281

(AL/V-Diethyl-p-bromoaniline)

C2 H3 OBr+

C2 H3 OBr+ CHaCOBr 10.55 ±0.05 PI 197* 182

C6 H5 OBr+ C6 H5 OBr+ C6 H4 BrOH 9.04 SL 187* 1066

(p-Bromophenol)

C6 HsOBr+ CeFBBrOH 9.15 TC 189 2194

(Bromophenol)

C7 H5 OBr+ C7 H5 OBr+ CeFLBrCHO

(Bromobenzaldehyde)

9.60 TC 212 2194

C8 H7 OBr+ C8 H7 OBr+ CeH.BrCOCHa

(Bromoacetophenone)

9.31 TC 198 2194

C13 H9OBr+

C]3 H9 OBr+ CsH.BrCOCeH^

(Bromobenzophenone)

9.34 TC 231 2194

C3 H5 02 Br+ C3 H502 Br+ CH2 BrCOOCH3 10.37 ±0.05 cs 146* 2025

214
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

CgH7 02Br+

CHH7 02 Br+ C6 H4 BrCOOCH3 9.34 TC 150 2194

(Methyl bromobenzoate)

C6 H4 FBr+

C6 H4 FBr+ CnH4 FBr 8.99 ±0.03 PI 187* 182

(p-Bromofluorobenzene)

C2 H3 FBr+

C2 H3 FBr+ CHBrFCH2 Br 10.75 ±0.02 PI 182

C2 H2 F2 Br+

C2 H2 F2 Br.+ CF2 BrCH2 Br 10.83±0.01 PI 160* 162

C2 H6 SiBr+

C2 HeSiBr+ (CHjbSiBr ch3 10.97 ±0.02 RPD 155 1421

C3 H9SiBr+

C3 H9 SiBr+ (CH3 bSiBr 10.24 ±0.02 RPD 171* 1421

C4 H3 BrS+ C4 H3 BrS+ C4 H3 BrS 8.63 ±0.01 PI 228* 182

(2-Bromothiophene)

CH2 ClBr+ CH2 ClBr+ CH2 ClBr 10.77 ±0.01 PI 236* 182

CH2 ClBr+ CH2 ClBr 10.75 ±0.05 SL 236 72

C2 H4ClBr+ C2 H4ClBr+ CH2 BrCH2 Cl 10.63 ±0.03 PI 227* 182

CHCl2 Br+ CHCl2 Br+ CHCl2 Br 10.88 ±0.05 SL 237* 72

CHClBrJ

CHClBr+ CHClBr2 10.59±0.01 PI 182

Rb+ Rb+ Rb 4.176 S 2113

Rb+ Rbl I 8.1 ±0.3 VC 2001

Sr+ Heat of formation 171 kcal mol 1

Sr+ Sr 5.694 s 171* 2113

Sr+ Sr 5.8±0.2 NS 173 2178

215
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Caseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation Ref.

(kcal mol -1

) Sr+2 Heat of formation 425 kcal mol 1

Sr+2 Sr 16.724 S 425* 2113

Sr+2 Sr 11.5±0.2 NS 2178

Sr+2 Sr 13.3±0.2 NS 2178

SrO+

SrO+ SrO 6.1 LE 137 1244, 2123

Sr2 0+

Sr2 0+ Sr2 0 4.8 LE 55 1244, 2123

SrF+

SrF+ SrF 4.9 ±0.3 VC 108 1105

SrF+ SrF 5.2±0.3 VC 115 1104

SrF+ SrF2 F-? 11 VC 132 1105

Y+ Heat of formation 252 kcal mol- 1

Y+ Y 6.528 S 252* 2113

Y+ Y 6 LE 240 2167

Y+ Y 6.4±0.3 LE 249 2151

Y+ YO 0 12 LE 210 2167

Y+ yf3 3F? 28 VC 293 2009

Y+ YC13 3C1 22.1 ±0.5 LE 244 2132

YO

YC+ yc2 c 13.4±0.5 LE 281 2151

YC+

YC+ yc2 6.8±0.3 LE 300 2151

YO+

>-< O+ YO 5.5 LE 119 2167

YF+ YF+ yf3 2F? 21.5 VC 162 2009

YF+

YF+ yf3 F? 13.5 VC -3 2009

YC1+

YC1+ yci3 2C1 17.3±0.5 LE 163 2132

YClj

YClJ yci3 Cl 14.5 ±0.5 LE 127 2132

216
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal moL- 1) yci,

YClg yci3 12.8 + 0.5 LE 117 2132

y2 cij

Y.C1J y2 ci6 Cl 13.7 ±0.5 LE 2132

Mo+ Heat of formation 321 kcal mol 1 Mo+ Mo 7.099 S 321* 2113

Mo+ Mo(CO)6 6C0 20.7 ±0.5 EVD 418 1107

Mo+ Mo(CO)e 6C0 18.3 ± 0.3 cs 363 2023

MoO

MoC+ Mo(CO)6 C02 + 4C0? 27.2±0.4 EVD 609 1107

MoO+ MoO+ MoO 8.0±0.6 LE 285 2126

MoO+

MoOj Mo02 9.2 LE 215 1244,2123

MoO+ Mo02 9.4 ± 0.6 LE 220 2126,2129

MoO£

MoO^ Mo03 11.8 LE 194 1244,2123

MoOj Mo03 12.0±0.6 LE 199 2126,2129

Mo2 0£

Mo2 0^ Mo2 05 10 LE 2129

Mo2 0^ Mo2 Oe 0 14.5 LE 4 2129

Mo2 OJ

Mo2 0+

b Mo2 06 12.1 ±0.6 LE 8 2129

Mo3 0£

Mo3 Oj Mo3 08 12.2 LE 2129

Mo3 0^ Mo3 09 0 14.5 LE -176 2129

Mo3 Oj

Mo3 0^ Mo3 Og 12. 0± 1.0 LE -174 2129

MoCO+ MoCO+ Mo(CO)6 5C0 18.1 ±0.3 EVD 331 1107

MoCO+ Mo(CO)6 5C0 15.8 ±0.06 CS 278 2023

M0CO+ 2 MoCO+2 Mo(CO)6 5C0 34.5 ±0.5 EVD 710 1107

217
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

MoC2 0£

MoC2 0^ Mo(CO)6 4C0 15.6 + 0.3 EVD 247 1107

MoC2 OJ Mo(CO)6 4C0 13.90±0.3 cs 208 2023

MoC2 0£2 M0C2 O+ 2 Mo(CO)6 4C0 30.8±0.5 EVD 598 1107

MoC3 0£

MoC3 0^ Mo(CO)6 3C0 13.7 + 0.3 EVD 177 1107

M0C3 OJ Mo(CO)6 3C0 12.36±0.12 CS 146 2023

M0C3O+2 M0C3 O+ 2 Mo(CO)6 3C0 29.1 ±1.2 EVD 532 1107

M0C4OJ

M0C4 O+ Mo(CO)6 2C0 11.9 ± 0.2 EVD 109 1107

M0C4 O+ Mo(CO)6 2C0 11.28 ± 0.14 CS 95 2023

M0C5OJ

MoC5 0£ Mo(CO)6 CO 9.80 + 0.15 EVD 34 1107

M0C5 O+ Mo(CO)6 CO 9.64 ±0.05 CS 31 2023

MoCeO^ Heal of formation -31 kcal mol-1

MoC6 0+ Mo(CO)6 8.12±0.03 PI -31* 1167

MoC6 OJ Mo(CO)6 8.23±0.12 EVD -28 1107

MoC6 0+ Mo(CO)6 8.30 ±0.03 CS -27 2023

SrMoO+

SrMoO+ SrMo04 02 ? 11.0 LE -3 1244

SrMoOj

SrMoO+ SrMo03 6.2 LE 4 1244

SrMoOj

SrMoOj SrMo04 9.2 LE -45 1244

Ru Heat of formation 323 kcal mol -1

Ru+ Ru 7.366 S 323* 2113

Ru+ Ru04 O2 + 20? 22.3±0.3 EVD 351 1284

RuO+ RuO+ Ru04 02 + 0? 18.1 ±0.3 EVD 314 1284

218
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

RuO+

RuOg Ru04 o2 14.2 ±0.2 EVD 283 1284

RuOj

R11O3 Ru04 0 15.7 ±0.3 EVD 259 1284

RuO+

RuO+ Ru04 12.33 ±0.23 EVD 240* 1284

Rh+ Heat of formation 305 kcal mol 1

Rh+ Rh 7.463 S 305* 2113

Rh+ Rh 7.4 NS 304 1020

RhO+ RhO+ RhO 9.3 NS 303 1020

RhO+

RhO+ Rh02 10.0 NS 271 1020

Pd+ Heat of formation 283 kcal mol 1

Pd+ Pd 8.336 S 283* 2113

Pd+ Pd 8.1 NS 277 1020

PdO+

PdO+ PdO 9.1 NS 1020

Cd+ Heat of formation 234 kcal mol-1

Cd+ Cd 8.993 S 234* 2113

Cd+ Cd 8.93 ±0.05 SL 233 1047

Cd+ Cd 9.0±0.2 LE 234 2056

CdCl+

CdCl+ CdCl2 Cl 11.8±0.2 LE 191 2056

CdClJ

CdCl+ CdCl2 11.2 ±0.2 LE 206 2056

In Heat of formation 192 kcal mol -1

In+ In 5.786 S 192* 2113

In+ In 5.8 ±0.3 LE 192 2138

In+ In 5.8 ±0.5 VC 192 1065

In+

InJ In2 5.8±0.3 LE 225 2138

ln2 0+

ln2 0+ ln2 0 7.8±0.5 VC 177 1065

219
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

Sn+ Heat of formation 242 kcal mol -l

Sn+ Sn 7.344 S 242* 2113

Sn+ SnH4 2H2 9.0± 0.3 LE 246 2116

Sn+ SnH4 2H2 11.4±0.2 LE 302 2137

Sn+ SnH4 H2 + 2H 13.4 + 0.4 LE 244 2116

Sn+ SnH4 H2 + 2H 15.5 ±0.2 LE 292 2137

Sn+ SnH4 4H 18.3 + 0.4 LE 253 2116

Sn+ SnH4 4H 19.5 + 0.2 LE 280 2137

Sn+ Sn2 H6 3H2 ± Sn 10.8 ±0.3 LE (a) 2133

Sn+ SnO 0 13. 0± 1 NS 244 1243

Sn+ SnS S 12.5 ±0.5 LE 250 2139

Sn+ SnSe Se 12.8 ±0.5 LE 272 2063

Sn+ (CH3 )4 Sn 4CH3 18.1 ±0.3 EVD 280 82

Sn+

Sn.| Sn2 H6 3H2 10.7 ± 0.3 LE 311 2133

SnJ Sn2 S2 s2 ? 16.5 ±1.0 LE 358 2139

SnH+ SnH+ SnH4 h2 + h 10.7±0.3 LE 234 2116

SnH+ SnH4 h2 ±h 13.3 ±0.2 LE 294 2137

SnH+ SnH4 3H 14.8±0.5 LE 224 2116

SnH+ SnH4 3H 17.3 ± 0.2 LE 282 2137

SnH+

SnH+ SnH4 h2 9.5 ±0.3 LE 258 2116

SnH2+ SnH4 h2 12.1 ±0.2 LE 318 2137

SnH+ SnII4 2H 13.9 ±0.4 LE 255 2116

SnH2+ SnH4 2H 16.4± 0.3 LE 313 2137

SnH+

SnH+ SnH4 H 9.4± 0.3 LE 204 2116

SnHj SnH4 H 1 1 .9 ± 0.2 LE 261 2137

Sn2 H+

Sn2 H+ Sn2 H6 2H2 + H 10.6 ±0.3 LE 257 2133

Sn2 H+

Sn2 H2 Sn2 H6 2H2 10.5 ±0.3 LE 307 2133

Sn2 H+

Sn2 H+ Sn2 H6 h2 + h 10.4 ±0.3 LE 252 2133

Sn2 H^

Sn2 H+ Sn2 H6 h2 10.3 ±0.3 LE 302 2133

Sn2 Hg

Sn2 H+ Sn2 H6 H 10.0± 0.3 LE 243 2133

220
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation Ref.

(kcal mol -1

)

Sn2 H+ Sn2 H6

Sn2 H£

9.0±0.3 LE 272 2133

SnO+ SnO

SnO+

10.5 ± 0.5 NS 246 1243, 1244

Sn2 0+ Sn2 02 Sn2 0+

0? 13.8±0.5 NS 199 1243

Sn2 0+ Sn2 02 0? 14.0 NS 203 1244

Sn2 0+ Sn2 02

Sn2 0+

9.8 ± 0.5 NS 166 1243, 1244

Sn3 0+ Sn3 03

Sn3Oj

9.8±0.5 NS 100 1243, 1244

Sn4 0+ Sn4 04

Sn40|

9.2 ± 0.5 NS 19 1243, 1244

SnS+ SnS

SnS+

9.7 ±0.5 LE 252 2139

Sn2 S

+ Sn2 S2

Sn2 S+

S 12.4 ±1.0 LE 228 2139

Sn2 Sj Sn2 S2

Sn2 S£

9.4 ±0.5 LE 225 2139

SnSe+ SnSe

SnSe+

9.7 ± 0.5 LE 254 2063

Sn2 Se+ Sn2 Se2

Sn2 SeJ

9.8 ± 0.5 LE 241 2063

CH3 Sn+ (CH3 )4 Sn

CH3 Sn+ 3CH3 15.7 ±0.4 EVD 258 82

C2 H6 Sn+ (CH3 )4 Sn

C2 HfiSn+ 2CH3 13.1 ±0.2 EVD 231 82

C3 H9 Sn+ C3 H9Sn+

(CH3 )4 Sn

Heat of formation 186 kcal mol-1

CH3 9.72 ±0.06 RPD 186* 1424

C3 H9 Sn+ (CH3 )4 Sn ch3 9.9±0.15 EVD 191 82

C3 H9 Sn+ (CH3 )3 SnC2 H5 c2 h5 9.47 ± 0.15 RPD 186* 1424

C3 H9 Sn+ n- C3 H7 Sn(CH3 )3 n-C3 H7 9.50 ± 0.12 RPD 185* 1424

C3 H9 Sn+ (CH3 )3 SnSn(CH3 )3 (CH3)3 Sn 9.84 ±0.09 RPD (b) 1424

323-656 0-69—15

221
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

C4Hi2 Sn+ C4H12 Sn+ (CH3 )4 Sn 8.25 ± 0.15 EVD 186* 82

C4 Hi2 Sn+ (CH3 ) 4 Sn 8.4 EC 189 218

Sb+ Heat of formation 262 kcal mol- l

Sb+ Sb 8.641 S 262* 2113

Sb+ Sb 8.6±0.3 LE 261 2138

Sb+ Sb2 Sb 11.5 ± 0.3 LE 259 2138

Sb+ Sb4 Sb2 + Sb? 15 ±0.5 LE 276 2138

Sb+ SbH3 h2 +h 12.1 ±0.2 LE 262 2116

Sb+ SbH3 3H 16.7 ±0.3 LE 264 2116

Sb+ Sb2 H4 Sb + 2H2 11.5 ± 0.3 LE (a) 2133

Sb£

Sb+ Sb2 8.4±0.3 LE 250 2138

Sb+ Sb4 Sb2 11.4±0.3 LE 256 2138

SbSb2 H4 2H2 11.2±0.3 LE 318 2133

Sb|

SbJ Sb4 Sb 10.8±0.3 LE 235 2138

Sbt

Sb+ Sb4 7.7 ±0.3 LE 227 2138

SbH+ SbH+ SbH3 h2 9.9 ± 0.2 LE 263 2116

SbH+ SbH3 2H 14.2 ±0.2 LE 258 2116

SbH2+

SbH+ SbH3 H 11.8±0.3 LE 255 2116

sbH3+

SbH+ SbH3 9.58 PI 256* 1091

SbH+ SbH3 9.9 ± 0.3 LE 263 2116

Sb2 H+

Sb2 H+ Sb2 H4 h2 + h 10.9 ±0.3 LE 259 2133

sb2 H:

Sb2 H+ Sb2 H4 h2 10.7±0.3 LE 306 2133

Sb2 H+

Sb2 H+ Sb2 H4 H 10.5 ±0.3 LE 250 2133

sb2 H:

Sb2 H+ Sb2 R, 10.2 ±0.3 LE 295 2133

222
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

InSb+

InSb+ InSb-2 Sb 8.4 ± 0.3 LE 206 2138

InSb,

InSb+ InSb-2 6.6 ± 0.4 LE 227 2138

C18 H15 Sb+

CisH15Sb+ (CfifDnSb 7.3±0.1 PI 255* 1140

(Triphenylstilbene)

Te+ Heat of formation 255 kcal mol 1

Te+ Te 9.009 S 255* 2113

Te+ Te 9.5 + 1.

LE 266 2063

Te+ GeTe Ge 13.3 + 0.5 NS 259 1023

Te+ SnTe Sn 12.1 ± 1.0 LE 245 2063

Te£

Tel Te2 8.4 + 0.6 NS 234 1023

GeTe+

GeTe+ GeTe 10.1 ±0.5 NS 275 1023

GeTe^

GeTeJ GeTe2 10.8 + 0.5 NS 293 1023

SnTe+

SnTe+ SnTe 9.1 ±0.5 LE 248 2063

I + Heat of formation 267 kcal mol 1

1+ I 10.457 S 267* 2113

1+ h I- 8.62 + 0.06 RPD 261 292, 288

1+ h I 12.02 + 0.04 RPD 267 292

1+ h I 12.72 + 0.04 RPD 292

1+ I2 I 13.71+0.06 RPD 292

I + Lil Li 14.4±0.3 VC 275 2001

1+ Nal Na 14.4 ± 0.3 VC 2001

1+ KI K 14.6 + 0.3 VC 2001

I + Rbl Rb 14.4± 0.3 VC 2001

1+ CH3 I ch3 ? 11.8±0.05 RPD 2154

1+ ch3 i ch3 12.9±0.05 RPD 267 2154

I + CH3I ch3 13.6 ±0.05 RPD 2154

1+ CH3 I ch3 14.4 ±0.05 RPD 2154

1+ c2 h5 i c2 h3 +h2 14.8±0.2 VC 274 356

1+ CNI CN- 9.8±0.1 SL 73

1+ CNI CN 14.3±0.1 SL 284 73

1+ CF3 I CFg? 10.6 ± 0.2 LE 439

1+ CF3I cf3 13.25 ±0.07 EVD 279 439

1+ CF3 I cf3 13.4 ± 0.

MSD 282 1111

1+ CF3 I cf3 13.6 ± 0.5 SL 287 24

1+ CF3 I cf2 + f? 16.4±0.2 LE 253 439

I + Csl Cs 14.1 ±0.3 VC 264 2001

1+ Til T1 13.4±0.1 RPD 267 2159

223
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

4(2 rw I2

I ; (1 \ : i Heat of formation

ij(2 n, /2!I) il(2 n3/2 „)

229 kcal mol-1

246 kcal mol-1

266 kcal mol-1

9.28 ±0.02 PI 229* 182,416

4(2 n3/2g ) I2 9.3 ±0.1 PI 229* 213

I2 9.35 ±0.03 RPD 231 288, 292

ijpnw I2 10.0±0.1 PI 246* 213

4(2 n,/29 ) I 2 9.97 ±0.02 RPD 245 288, 292

I J(

2

LI:i/2j/) I2 10.9±0.1 PI 266* 213

it( 2 n3/ 2 U ) I2 10.91 ±0.04 RPD 267 288, 292

i+( 2 n1/2M ) I2 11.72 ±0.04 RPD 285 288, 292

I2 13.64 ±0.06 RPD 329 288,292

HI+(2 II3/2 ) HI

HI+

(

2n3/ 2 ) Heat of formation 246 kcal mol-1

10.38 ±0.02 PI 246* 182,416

Hi+( 2 n3/2 ) HI 10.4 ±0.1 PI 246* 213

Hi+(2 n3/2 ) HI 10.44 ±0.04 RPD 247 463

HI+(2 H1/2 ) HI 11.14±0.04 RPD 263 463

HI+

( 2 £) HI 13.27 ±0.10 RPD 312 463

HI+ HI 10.4 ±0.1 VC 246 2001

HI+ HI 10.5±0.1 VC 248 2001

HI+ c2 hj c2 h4 11.7 ±0.1 VC 255 356

HP2 HI

HI 2

30.0 ±0.5 FDP 698 212

Lil + Lil

Lil +

8.6±0.3 VC 179 2001

Li2 I+ Li2 I2

Li2 I +

I 9.2±0.3 VC 105 2001

Li3 IJ Li3I3

Li3 I 2

I 9.2 ±0.3 VC 2001

BI+ bi3

BI+

21 14.4 ± 0.2 VC 298 206

BP bi3 21 14.6 ±0.2 VC 303 206

B1+ bi3

Bit

i 9.7±0.2 VC 215 206

BI+ bi3 i 10.1 ±0.2 VC 224 206

BIJ bi3

BIJ

9.0±0.2 VC 225 206

CP CNI

CI+ N 17.6±0.3 SL 347 73

224
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

IF+

IF+ IF 10.5 ± 0.3 VC 219 357

IF+ if5 24 VC 357

IFJ

ft if5 2F + F-? 15.1 ±0.3 VC 179 357

if;

IFJ if5 F + F-? 11.5 ± 0.3 VC 114 357

IF}

if: if5 F-? 13.6 ±0.3 VC 182 357

if;

if: if5 13.5 ± 0.2 VC 115 357

if: if5 21.8 VC 357

Nal+

Nal+ Nal 8.7 ± 0.3 VC 2001

Na2 I + Na2 I + Na2 I2 1 9.1 ±0.3 VC 2001

Na3l£

Na3 I+ Na3 I3 I 8.6 ± 0.3 VC 2001

Mgl+

Mgl+ Mgl2 I 1 1 .5 ± 0.5 VC 199 178

Mgl+

Mgl+ Mgl2 10.0 ± 0.5 VC 190 178

Mgj;

M&IJ Mg2 I 4 I 10.0 ± 0.4 VC 92 178

ICl+

(

2 n3/ 2 y) Heat of formation 242 kcal mol 1

ici+

( 2 n3/ 29 ) IC1 10.31 ±0.02 RPD 242* 292

IC1+ IC1 10.4 ± 0.2 VC 244 357

ici+(2 n1/2(/ ) IC1 10.79 ± 0.03 RPD 253 292

ici+

( 2 n3/ 2 „) IC1 12.13±0.04 RPD 284 292

KI

KI+ KI 8.2±0.3 VC 2001

K2 I+

k2 i+ k2 i 2 I 8.2 ±0.3 VC 2001

225
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

IBr+

(

2 n3/ 2y) Heat of formation 240 kcal mol-1

IBr+

( 2n3/2g) IBr 9.98 ±0.03 RPD 240* 292

IBr+ IBr 10.3 ±0.2 VC 247 357

IBr+

( 2 lli/ 2g) IBr 10.49 ±0.03 RPD 252 292

IBr+

( 2 n3/2;<) IBr 11.59 ±0.05 RPD 277 292

Rbl+

Rbl+ Rbl 8.0±0.3 VC 2001

Rb2 I +

RbsP Rb2 I2 I 8.2±0.3 VC 2001

b5 h8 i +

BsHsP b5 h8 i 11.1 ±0.5 SL 103

b5 h«i+ B5 H«I 9.2±0.1 EVD 1102

ch2 i + ch2 i+ ch3 i H 12.08 ±0.09 RPD 230 1139

ch2 i+ ch3 i H 13.7 RPD 267 160

ch2 i+ CHJ H 15.0 RPD 160

ch2 i + CH3 I H 13.1 ±0.2 VC 253 356

ch2 i+ C2 H5 I ch3 13.7±0.3 VC 281 356

CHJ+ ch3 i H-? 13.0 RPD 270 160

CH2 I + CH3 I H-? 14.3 RPD 160

CH3 I

+

(

2 Ei/2 ) Heat of formation 223 kcal mol 1 CH3I+(2 E3/2 ) 237 kcal mol 1 CH3 I+( 2 E1/2 ) ch3 i 9.538 ±0.003 S 223* 2064

CH3 I+( 2E 1/2 ) CH3I 9.54±0.01 PI 223* 182. 416

CH3 I+( 2 E1/2 ) ch3 i 9.550 ±0.006 PI 223* 1253

ch3 p( 2 e1/2 ) ch3 i 9.55 ±0.1 PI 223* 213

CH3 I+( 2 E 1/2 ) CHsI 9.51 ±0.02 RPD 222 289

CH3 I+(fc/2 ) ch3 i 10.165 ±0.003 S 238* 2064

CH3 I+( 2 E3/2 ) ch3 i 10.12 ±0.03 PI 236* 1253

ch3 i +

( 2 e3/2 ) ch3 i 10.15 ±0.1 PI 237* 213

CH3 I+( 2 E3/2 ) ch3 i 10.0 ±0.05 RPD 234 2154

CH3 I+( 2 E3/2 ) CIRI 10.09 ±0.04 RPD 236 289

ch3 i+ ch3 i 11.2±0.05 RPD 2154

ch3 i+ CH3I 11.22 ±0.06 RPD 289

ch3 i+ ch3 i 13.1 ±0.05 RPD 2154

ch3 i+ CHal 13.14±0.05 RPD 289

CHsP CHal 19.76 ±0.2 RPD 289
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C2 H5 I +

(

2 Ei/2 ) Heat of formation 213 kcal mol 1 C2 H5I

+

(

2 E3/2 ) 227 kcal mol 1 C2 H5l+( 2 E1/2 ) C2 H5l 9.346 ±0.005 S 214* 2065

c2 h5 i+

:(2 e1/2 ) c2 h5 i 9.33 ±0.01 PI 213* 182, 416

C2 H5l+

( 2 E1/2 ) c2 h5 i 9.35 ±0.02 RPD 214 224

c2 h5 i+ c2 h5 i 9.6 ± 0.2 VC 220 356

c2 h5 d(2 e3/2 ) c2 h5i 9.928 ±0.005 S 227* 2065

C2 H,I+( 2 E3/2 ) c2 h5 i 9.85 ±0.1 RPD 225 224

C2 H5 I+( 2 E3/2 ) c2 h5 i 9.85 RPD 225 160

c2 hj+ c2 h5 i 10.60 ±0.1 RPD 224

c2 h5 i+ c2 h5 i 10.6 RPD 160

c2 h5 i+ C,H,I 10.6 TC 2038

c2 h5 i+ c2 h5 i 12.1 RPD 160

c2 h5i+ c2 h.5 i 12.2 TC 2038

c2 h5 i+ c2 h5 i 13.0 RPD 160

c2 h5 i+ c2 h5 i 13.2 TC 2038

fi-C3 H7 I

+

(

2 Ei/2) Heat of formation 208 kcal mol 1 iso-C3 H7 I +

(

2 Ei/2) 201 kcal mol 1 C3 H7 I +

( 2 Ei, 2 ) n-C3 H7 I 9.26±0.01 PI 208* 182

C3H7 I +

( 2 E3, 2) n-C3 H7 I 9.85 RPD 221 160

c3 h7 i+ n-C3 H7 I 10.4 RPD 160 c3h7 i + n-C3 H7 I 10.4 TC 2038

c3 h7 i+ n-C3 H7I 11.4 RPD 160

c3h7i+ n-C3 H7 I 11.6 TC 2038 c3h7i+ n-C3 H7 I 12.2 RPD 160

c3h7 i+ n-C3 H7 I 12.4 TC 2038

c3 h7i+ n-C3 H7 I 13.0 RPD 160

c3 h7 i+ n-C3 H7 I 13.2 TC 2038

C3 H7 I +

( 2 Ei, 2 ) 150-C3H7I 9.17 ± 0.02 PI 201* 182

c3 h7i+ 150-C3 H7 I 10.5 TC 2038

c3 h7 i+ iso-C3 H7 I 11.0 TC 2038

c3h7i + t50-C3 H7 I 12.8 TC 2038

c3 h7 i+ iso-C3 H7 I 13.2 TC 2038

c4 h9 i c4 h9 i+ 7l-C 4 H9 I 9.21 ±0.01 PI 202* 182 c4 h9 i+ sec-C4 H9I 9.09 ±0.02 PI 198* 182 c4h9i + iso-C4H9I 9. 18 ±0.02 PI 200* 182

c4 h9 i+ tert-C 4 H9 I 9.02 ±0.03 PI 193* 182

c5 h„i+

c5 h„i+ n-C5 HnI 9. 19 ± 0.01 PI 197* 182, 416

c«h5 i+

c6 h5 i+ c«h5 i 8.73 ±0.03 PI 238* 182, 416

(Iodobenzene)

c7 h7 i

+ c7h7 i+ c«h4 ich3 8.62 ±0.01 PI 228* 182

(o-Iodotoluene)

C7 H7 1 + c6 h4 ich3 8.61 ±0.03 PI 226* 182

(m-Iodotoluene)

C7H7I + c6 h4 ich3 8.50 ± 0.01 PI 224* 182

(p-Iodotoluene)

227
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

APorIP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

CNI+ CNI+ CNI 10.98 + 0.05 SL 307* 73

CF2 I + CF2 I + cf3 i F 14.58 + 0.06 EVD 176 439

CF2 I + cf3 i F 15.3 + 0.3 SL 193 24

cf3 i + cf3 i+ cf3 i 10.64 + 0.02 EVD 104 439

cf3 i + cf3 i 10.0 ±0.3 SL 90 24

cf3i+ cf3 i 10.5 + 0.1 MSD 101 1111

c6f5 i +

c6f5 i+ c6f5 i 9.5 ±0.1 SL 301

(Iodopentafluorobenzene)

c3 f7i+

c3f7 i+ n-C3 F7 I 10.36±0.01 PI 182

LiNaI+ LiNaI+ LiNaI2 I 9.0±0.3 VC 2001

UKI+

LiKI+ LiKI2 I 9.0±0.3 VC 2001

LiRbI+

LiRbI+ LiRbI2 I 8.4±0.3 VC 2001

c8 h10ni+ c8 h10 ni+ C6 H4 IN(CH3)2 7.29 CTS 205 1281

(AL/V-Dimethyl-p-iodoaniline)

c2 h2 f3 i+

c2 h2 f3 i+ cf3 ch2 i 10.00 ±0.01 PI 182

c4 h2 f-i +

c4 h2 f7 i+ n-C3 F7 CH2 I 9.96 ±0.02 PI 182

c6 h4 cii +

Cb H4C1I + C6 H4 C1I 8.35±0.1 PI 222* 416

(o-Chloroiodobenzene)

Cs+ Heat of formation 109 kcal mol- l

Cs+ Cs 3.894 s 109* 2113

Cs+ CsCl Cl 11.9±0.2 LE 183 2056

Cs+ Csl I 8.3±0.3 VC 124 2001

Cs+ Csl I 7.3 ± 1 NS 101 1239

228
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

APorIP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

Csl+ Csl

Csl+

7.9±0.3 VC 140 2001

Csl + Csl 7.3 ±1 NS 126 1239

Cs2 I+ Cs2 I2

Cs2 I

+

I 8.1 ±0.3 VC 40 2001

Cs2 I+ Cs2 12 I 10.7 ±1 NS 100 1239

CsCdCP CsCdCla

CsCdCl+

2C1 10.5 ±0.2 LE 2056

LiCsI+ LiCsI2

LiCsI+

I 8.6±0.3 VC 2001

Ba+ Ba

Ba+ Heal of formation 162 kcal mol

5.211

l

S 162* 2113

Ba+ Ba 5.2 ±0.1 NS 162 2178

Ba+ BaO 0 13.2 ±0.2 NS 200 2178

Ba+ Bal2 21? 12.8 ± 1 NS 160 1239

Ba+2 Ba

Ba+2 Heat of formation 393 kcal mol

15.215

-l

S 393* 2113

Ba+2 Ba 11.5±0.3 NS 307 2178

Ba+2 BaO 0 20.6 ±0.5 NS 371 2178

Ba+3 Ba

Ba+3

57.5 NS 1368 2178

BaO+ BaO

BaO+

6.5±0.3 NS 105 2178

BaO+ BaO 7 ± 1 NS 117 2052

BaF+ BaF

BaF+

4.9 ±0.3 NS 104 1104

Bal+ Bal2

Bal+

I 9.6 ± 1 NS 112 1239

BalJ Bal2

Bal+

8.1 ± 1 NS 103 1239

BaOH+ BaOH

BaOH+

4.5± 1 NS 35 2052

La+ La

La+ Heat of formation 232 keal mol

5.615 ±0.03

l

S 232* 2113

La+ LaF3 3F? 26.5 VC 228 2009

229
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

LaF+ LaF3

LaF+

2F 18.5 VC 63 2009

LaF+ LaF3

LaF|

F 12.0 VC -68 2009

Nd+ Nd

Nd+ Heat of formation 206 kcal mol

5.46

-1

s 204* 2177

Nd+ Nd 5.62 s 208* 2177

Sm+ Sm

Sm

5.70 ±0.02 SI 180* 1165

Eu+ Eu

Eu+

5.68 ±0.03 SI 173* 1165

Dy+ Dy

Dy+

5.80±0.02 SI 205* 1165

Ho+ Ho

Ho+

6.19±0.02 SI 213* 1165

Er+ Er

Er+

6.3±0.1 s 227* 1286

Tm+ Tm

Tm Heat of formation 203 kcal mol

5.81 ±0.02

-1

s 193 2186

Tm+ Tm 6.22 ±0.02 s 203* 1448

Tm+ Tm 6.51 ±0.08 s 209 1286

Tm+ Tm 6.15±0.02 SI 201 1165

Lu+ Lu

Lu+

5.41 ±0.02 SI 227* 1165

TaO+ TaO

TaO+

6±0.5 VC 200 2050

TaO+ Ta02 TaO^9 ± 0.5 VC 164 2050

W+ W

W+ Heat of formation 387 kcal mol7.98

1

s 387* 2113

W+ W(C0)« 6C0 22.9±0.6 EVD 478 1107

W+ W(C0)6 6C0 20.6 ±0.2 cs 425 2023

WC+ W(C0)6 WO

C02 + 4C0? 28.8± 0.5 EVD 656 1107

230
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation Ref.

(kcal mol-

*) WO+

W0+ wo 9.1 ± 1 LE 318 2126

wo^

wo* wo2 9.8 LE 237 1244, 2123

W0+ wo2 9.9 ± 0.6 LE 239 2126

W0+ wo3 0 14.2 VC 197 2131

WOJ

wo3+ wo3 11.7 ± 0.6 LE 199 2126

WOJ wo3 11.9 LE 203 1244, 2123

wo3+ wo3 12.1 VC 208 2131

W2Oj

W2 0+ w2 o6 0 15.8 VC 28 2131

w2 o^

W.0.+ W2 0h 13.4 VC 32 2131

w3 0£

w3 0+ W309 0 15.5 VC -170 2131

w3 o^

w3 0+ W309 13.3 VC -161 2131

wco+ WCO+ W(CO)e 5C0 20.2 ±0.3 EVD 390 1107

WCO+ W(CO)fe 5C0 18.5 ±0.16 cs 350 2023

wc2 o+ wc2 o W(CO)« C02 + 3C0? 25.9±0.6 EVD 562 1107

wc2 o$

wc2 o+ W(CO)e 4C0 17.6±0.2 EVD 303 1017

wc2 o+ W(CO)6 4C0 16.07 ±0.04 CS 268 2023

wc3ot

WC303+ W(CO)e 3C0 14.9 ±0.2 EVD 215 1107

WC30+ W(CO)« 3C0 13.60 ±0.02 CS 185 2023

wc4oi

WC40+ W(CO)6 2C0 12.7 ±0.2 EVD 137 1107

WC40+ W(CO)6 2C0 11.82 ±0.02 CS 117 2023

wc5 o+

WC50+ W(CO)h CO 9.80±0.17 EVD 44 1107

WC50+ W(CO)b CO 9.97 ±0.04 CS 48 2023

231
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

wc6o<t

WC«Obt W(CO)h 8.18 + 0.03 PI — 20* 1167

WC,;Obt W(CO)h 8.56 + 0.13 EVD -11 1107

wc«o+ W(CO)« 8.46 + 0.02 cs -13 2023

CaWOj

CaWO+ CaW03 6.7 LE 38 1244

CaWO}

CaWO+ CaW04 9.8 LE 3 1244

SrWO+

SrW03+ SrW03 6.4 LE 4 1244

SrWO+

SrWO+ SrW04 9.4 LE -34 1244

SnWO+

SnWO+ SnW04 10.8 LE 57 1244

Sn2WO£

Sn2 WOt Sn2 W05 8.4 LE -58 1244

ReClJ

ReCl^ Re3 CL Re2 CL? 16 + 0.5 VC 2140

ReCl|

ReCl+ Re3 Cl.| Re2 Cl5 ? 16 + 0.5 VC 2140

Re^lg

Re2 Cl^ Re3 CI9 ReClg+Cl 13.5 + 0.5 VC 2140

- Re2 C4

Re2 Cl^ Re3 Cly ReCR? 13.5 + 0.5 VC 2140

Re3C4

Re3 Cl^ Re3 Cl9 Cl 13 + 0.5 VC 131 2140

Re3 Cl£

Re3 Cl+ Re3 Cl9 10.5 + 0.5 VC 102 2140

Os+ Heat of formation 390 kcal mol- l

0s+ Os 8.7 s 390* 2113

0s+ 0s04 02 + 20? 26.8 + 0.5 EVD 418 1284

232
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

0s0+ 0s04 OsO+ 02 + 0? 21.2 ± 0.2 EVD 349 1284

OsOj 0s04

OsO£

o2 17.1 ±0.2 , EVD 314 1284

OsO^ 0s03

OsO;'{

12.3 ± 1 LE 216 2127

0s0+ 0s04 0 17.00 ± 0. 10 EVD 252 1284

0s0+ 0s04

OsOj

12.97±0.12 EVD 219* 1284

0s0+ 0s04 12.6 ± 1 LE 210 2127

Ir+ Ir

Ir+

9 S 367 2113

Ir+ Ir 9.6 NS 380 1124

Ir+ IrO-2 o2 13.1 NS 351 1124

IrO+ IrO

IrO+

10.1 NS 337 1124

IrO + Ir02 0 15.1 NS 337 1124

Ir02+ Ir02

IrOj

10.9 NS 300 1124

IrOj Ir03

IrOj

11.9 NS 276 1124

Hg+ Hg

Hg+ Heat of formation 25 5 kcal mol -

10.44

t

S 255* 2113

Hg+2 Hg

Hg+2 Heat of formation 688 kcal mol

29.19

t

s 688* 2113

Hg+2 Hg 29.8 VC 702 211

Hg42 Hg 29.0 ± 0.2 NRE 683 211

Hg+3 Hg

Hg+ 3 Heat of formation 1477 kcal mol

63.4

-l

S 1477* 2113

Hg+3 Hg 68.5 VC 1594 211

Hg+3 Hg 63.5±0.5 NRE 1479 211

Hg+4 Hg

Hg 4

122.5 VC 2840 211

Hg+4 Hg 113 ± 1 NRE 2621 211

233
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

Hg+5 Hg

Hg 5

175 VC 4050 211

Hg

+ 5 Hg 158 ±2 NRE 3658 211

Hg+« Hg

Hg 6

300 VC 6933 211

Hg+e Hg 225 ±10 NRE 5203 211

CH3 Hg+ (CH3 )2 Hg

CH3Hg+ ch3 10.4 ±0.2 EVD 233 83

CH3 Hg+ (CH3)2 Hg ch3 10.5±0.1 SL 235 306

CH3 Hg+ CH3 HgCl Cl 12.35 ± 0.2 SL 244 306

C2 H5 Hg+ (C2 H5 )2 Hg

C2 H5 Hg+

c2 h5 9.65 ±0.1 SL 223 306

C2 H6 Hg+ C2 H6 Hg+ Heat of formation 233 kcal mol-1

(CHabHg 8.90 ±0.2 EVD 231* 83

C2 H6 Hg+ (CHafeHg 9.1 ±0.1 SL 236* 306

C3 H7 Hg+ ( iso- C3 H7 bHg

C3 H7Hg+

t50-C3 H7 9.1 ±0.1 SL 206 306

C4 H10 Hg+ (C2 H3 >2 Hg

C4 H10Hg+

8.5±0.1 SL 221* 306

C6 H14 Hg+ ( iso

3 H7 )2 Hg

C6H14Hg+

7.6±0.1 SL r-H CO 00 * 306

CH3 HgCl+ CH3 HgCl

CH3 HgCl+

11.5±0.2 SL 253* 306

Tl+

T1+

T1

Heat of formation 184 kcal mol -

6.108

l

S 184* 2113

T1+ T1C1 Cl 10.0±0.1 RPD 185 2159

T1+ TIBr Br- 5.95 ±0.1 RPD 184 2159

T1+ Til I- 6.0±0.1 RPD 187 2159

Pb+

Pb +

Pb

Heat of formation 218 kcal mol

7.417

-l

S 218* 2113

Pb+ Pb 7.3±0.5 LE 215 1245

Pb+ Pb 7.5±0.5 LE 220 2139

Pb+ PbH4 H2 + 2H 11.2 LE (a) 2116

Pb+ PbS S 1 1 .6 ± 0.5 LE 233 2139

Pb+ PbCl, Cl2 12.0±0.2 LE 226 2056

Pb+ (CH3 )4 Pb 4CH3 15.0±0.5 EVD 246 82

234
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

PbH+ PbH4 PbH+

3H 11.1 LE 163 2116

PbH+ PbH,

PbHJ

2H 10.1 LE 192 2116

PbH+ PbHt

PbHj

H 9.6 LE 233 2116

PbO+ PbO

PbO+

9.0±0.5 LE 225 1245

Pb2 0+ Pb2 02 ? Pb2 0+0? 11. 9± 1.0 LE 186 1245

Pb20+ Pb2 02

Pb2 0+

8.8 ±0.5 LE 174 1245

Phs02+ Pb3 03 ?

Pb3 Oj

0? 14.6 ±1.0 LE 202 1245

Pb30+ Pb3 03

Pb3 0+

9.7 ± 1.0 LE 149 1245

Pb4 0+ Pb4 04

Pb4 0+

8.5 ± 1.0 LE 62 1245

PbS+ PbS

PbS+

8.6±0.5 LE 230 2139

Pb2 Sj Pb2 S2

Pb2 S+

9.2±0.5 LE 231 2139

PbCP PbCl2

PbCl+

Cl 11.7 ±0.2 LE 190 2056

PbCl+ PbCl2

PbCl+2

11.2 ± 0.2 LE 208 2056

CH3 Pb+ (CH3 )4 Pb

CH3 Pb+ 3CH3 12.4 ± 0.2 EVD 219 82

C2 H6Pb+ (CH3 )4 Pb

C2 H6 Pb+ 2CH3 11.6±0.2 EVD 234 82

235
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

C3HgPb+

C3 H9 Pb+ (CH3 )4 Pb ch3 8.9±0.1 EVD 205 82

C4 H12 Pb+

C4H12 Pb+ (CH3 )4 Pb 8.0±0.4 EVD 217* 82

RbPbCl+

RbPbCp RbPbCl3 Cl 11.6 + 0.2 LE 2056

CsPbCP

CsPbCP CsPbCl3 2C1 11.5 ± 0.2 LE 2056

Bi+ Heat of formation 218 kcal mol l

Bi+ Bi 7.289 S 218* 2113

Bi + Bi 8 NS 234 2049

Bi+ BiH3 3H 13.4 LE (a) 2116

BiJ

Bi+ Bi2 8 NS 237 2049

BiH+

BiH+ BiH3 2H 12.2 LE 242 2116

BiHj

BiH+ BiH3 H 12.4 LE 299 2116

BiH+

BiHj BiH3 10.1 LE 298 2116

BiS+

BiS + BiS 8 NS 227 2049

Bi2 S

+

Bi2 S

+ Bi2 S2 s 14 NS 2049

Ci8 Hi5 Bi+

Ci 8 Hi 5 Bi+ (CeHsbBi 7.3 ±0.1 PI 288* 1140

(Triphenylbismuth)

Att

At1 At2 8.3 D 104

236
TABLE 1. Ionization Potentials, Appearance Potentials, and Heats of Formation of

Gaseous Positive Ions — Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

U+ Heat of formation 266 kcal mol - L u+ U 6.11+0.05 RPD 266* 16

U+ U 6.08 ±0.08 SI 265* 317

U+ U 5.4±0.3 LE 250 2126

u+ U 4.9 VC 238 2054

u+ uo 0 13.4 VC 255 2054

uo+

U0+ uo 5.72 ±0.06 RPD 138 16

U0+ uo 4.7 ± 0.6 LE 114 2126

ucu uo 4.2 VC 103 2054

UO+

uo.t uo2 5.5±0.1 RPD 31 16

U0+ uo. 4.3 ±0.6 LE 3 2126

U0+ uo2 4.9 VC 17 2054

UOJ

U0+ uo3 10.4 ±0.6 LE 51 2126

Pu

Pu + Pu 5.1 ±0.5 SI 1149

Am

Am+ Am 6.0 s 341

237

323-656 0-69—16
4. TABLE 2. Heats of Formation of Gaseous Neutral Species Derived

from the Data of Table 1

This table lists heats of formation of neutral species derived from appearance

potential measurements. Here (a) refers to a neutral reactant, and (b) to a neutral

product. These quantities are listed for illustrative purposes and have not been

evaluated.

TABLE 2. Heats of Formation of Gaseous Neutral Species Derived from the Data of Table 1

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol-1

)

Ref.

ch2 CH.+ ch2 10.396 ±0.003 S 93(a) 1078

CH+ ch2 11.82 ±0.05 VC 60(a) 327

CH+ ch2 10.7 ±0.5 NS 86(a) 87

(El on neutral fragment from C3 H8 ) CH+ ch2 11.0±0.5 NS 79(a) 87

(El on neutral fragment from n-C4 Hio)

c2 h

CH+ CHsC^CH c2 h 15.4±0.5 VC 140(b) 13

C2 H+ C.ILC^CH c2 h 12.9±0.1 VC 118(b) 13

C3 H3 CHJ ch3 ch=c=ch2 c3 h3 14.4±0.2 SL 112(b) 462

CH} ch3 c=cch3 c3 h3 17.6±0.5 VC 182(b) 13

C1+ CHgC^CCl c3 h3 18.4±0.5 VC 132(b) 13

Br+ CH3 C=CBr c3 h3 16.0 ±0.5 VC 118(b) 13

c3h§ C2 H5 C^CC^CH c3 h3 12.20 EVD 120(b) 1197

c3 h+ ch3 c=cch2 c^ch c3 h3 12.05 EVD 117(b) 1197

c3 h 3+ CHaC^CC^CCH, c3h3 11.99 EVD 111(b) 1197

c3 h 3+ ch=cch2 ch>c=ch c3 h3 12.17 EVD 125(b) 1197

c3 h+ c6 h6 c3 h3 15.17 ±0.1 EVD 115(b) 1238

(Benzene)

c3 h+ CeHs c3 h3 16 EVD 135(b) 1197

(Benzene)

C3 HJ c8 h« c3 h3 +c2 h2 1 1 . 14 ± 0. 18 EVD 96(b) 2105

(Cubane)

c3 h5 CsH

ch2=chch2 8.15 ±0.03 SL 28(a) 2114

C3 Ht c3 h5 8.05 ±0.1 SL 53(a) 123

(Cyclopropyl radical)

c4 h2 c6 h+ CioHs c4 h2 15.20 ±0.05 SL 150(b) 2112

(Naphthalene)

Cfi H + C.oHh c4 h2 13.86 ±0.05 SL 159(b) 2112

(Azulene)

238
TABLE 2. Heats of Formation of Gaseous Neutral Species Derived from the Data of Table 1 — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c4 h7 c4 h+ CH3 CH=CHCH2 7.71 ±0.05 EVD 23(a) 108

CiH CH2=C(Ci3 )CH2 8.03 ± 0.05 EVD 20(a) 108

c4 h, QHy 7.88 ±0.05 SL 31(a) 123

(Cyclobutyl radical)

c4 h9 c4 h+ tert- C4 Hh 7.42 ±0.07 SL 0(a) 141, 145

C5H5

CbHt (C6 H5 )2 C03 C5 H5 + CO 12.1 ±0.1 SL 28(b) 1237

(Diphenyl carbonate) + co2 c5 h9 c5 h+ c5 h9 7.79 ±0.03 SL 14(a) 123

(Cyclopentyl radical)

c5 h„

c5 h+ n-C3 H7 CHCH3 7.73 ±0.1 EVD 5(a) 151

c5 h+ (C2 H5 ) 2 CH 7.86 ±0.05 EVD 7(a) 151

c5 h

?cr?-C.-,Hn 7.12 ±0.1 EVD 0(a) 151

c6 h4 C6 H60+ (C«H5 )2 0 CeH, 13.88±0.15 SL 164(b) 1237

(Phenyl ether)

c6 h5 c2 h+ C6 H5 SC2 H5 c6h5 +s 13.7 SL 49(b) 307

(Phenyl ethyl sulfide)

C6 Hu

CbH+ C6 Hh 7.66 ±0.05 SL 8(a) 123

(Cyclohiexyl radical)

C7H10

C-H+ c7 h10 C.H, 9.58±0.15 SL 30(a) 2155

(Norbornene)

c2 h«b

cut (CH3 ) 3 B (CH3 ) 2 B 15.1 ±0.3 SL 60(b) 364

NH

Nf hn3 NH 16.0±0.1 SL 80(b) 340

n2 h3 CH+ ch3 n2 h3 n2 h3 14.1 ±0.3 SL 89(b) 424

323-656 0-69—17

239
TABLE 2. Heats of Formation of Gaseous Neutral Species Derived from the Data of Table 1 — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

c2 h2 n+ ch.cn

c2 h2 n

10.87±0.1 SL 47(a) 125

c,h2 n+ ch.cn 10.86 ± 0.2 SL 48(a) 125

c2 h2 n+ ch2 cn 10.95 ±0.2 SL 46(a) 125

c3 h+ c5 h5 n c2 h2 n? 14.00 ±0.10 EVD 101 (b) 1406

(Pyridine)

C«H6N + C5 H4 NCH0 c6 h6 n

8.17 ±0.1 SL 69(a) 1011

(2-Pyridylmethyl radical)

C6 H6 N+ C5 H4 NCH. 7.92 ±0.1 SL 76(a) 1011

(3-Pyridylmethyl radical)

C6 H6 N+ C5 H4 NCH, 8.40±0.15 SL 60(a) 1011

(4-Pyridylmethyl radical)

cut CH2 N2 ch2 n2 n2 12.3±0.1 VC 49(a) 314

(Diazomethane)

CH+ CH2 N2 n2 11 . 0 ± 0.1 VC 79(a) 314

(Diazirine)

CH+ (CH3)2 N2 H2 ch5 n2 ch3 nnh2 14.5 ±0.3 SL 95(b) 424

(1,1-Dimethylhydrazine)

CH+ (CH3 >,N2 H, CHjNHNH 13.9±0.3 SL 83(b) 424

( 1 ,2-Dimethylhydrazine)

C,H7 N+ (CH3 >2 N2 H

c2 h7 n2 6.6±0.3 SL 16(a) 67

(1,1-Dimethylhydrazyl radical)

CH+ (CH^N.H (CH3 )2 N,H 14.0 ±0.5 SL 83(b) 424

CH+ (CH3 )4 N2 c3 h9n2 (CH3 )3 N2 14 ± 1 SL 83(b) 424

c2 h+ c2h5 ono2 NOs

no3 ? 11.86±0.25 VC 18(b) 1013

CH+ (CH3 )2 0

ch3 o

ch3 o 13.1 RPD 1 (b) 2018

c«hs o+ c6 h5 o

c6 h5 o

8.84 SL 22(a) 1079

(Phenoxy radical)

CH+ C2 H50N02 ch2 no3 ch2 ono2 13.75 ±0.50 VC 21 (b) 1013

240
TABLE 2. Heats of Formation of Gaseous Neutral Species Derived from the Data of Table 1 — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

bhf2 CH + CH3 BF2 hbf2 16.9±0.1 VC - 137(b) 1076

c2h+ c2 h3 bf2 hbf2 13.75±0.1 VC - 190(b) 1076

c2 h+ c2 h5 bf2 hbf2 12.08 ± 0.01 VC - 188(b) 1076

C.H+ tso-C3 H7 BF2 hbf2 11.48 + 0.02 LE - 183(b) 1076

c2 hf

c4h+ c6 h5 f c2 hf 17.00 ±0.1 SL 72(b) 2103

(Fluorobenzene)

C2H4F

c3 h+ n-CsHnF C2 H4 F? 12.02 SL -7(b) 2029

chf2 CHF+ chf2 9.45 SL — 74(a) 141

ch3+ ch3 chf2 chf2 18.6 VC 56(b) 1288

C3H3F3

c2 h+ c2 h3 cf3 hcf3 13.3±0.15 SL — 154(a) 1075

C3H5F3

c2 h5+ c2 h5 cf3 cf3 12.82 ± 0.02 SL -191(a) 1075

ch3 bf2 BF+ ch3 bf2 ch3 13.62 ±0.02 SL - 194(a) 1076

c2 h3 bf2 C2 H3+ C2 H3 BF2 bf2 14.25 ±0.05 VC — 190(a) 1076

c2 h5 bf2 c2 h+ c2 h5 bf2 bf2 13.1 ±0.2 VC -214(a) 1076

c3 h7 bf2 c3 h+ 150-C3 H7BF2 bf2 12.05 ±0.05 VC -219(a) 1076

C3H30F3

ch3+ ch3 cocf3 C0 +CF3 14.60 SL -218(a) 298

SiH3 c2 h+ ^HsSiHa SiH3 12.6 ± 0.2 SL 40(b) 2182

c3 h+ iso-C3 H7 SiH3 Silt! 11.33 ±0.03 SL 33(b) 2182

C2 H7 Si

CHJ (CH3 )sSiH (CH3 )2 SiH 14.8 ±0.5 EVD 40(b) 83

241
TABLE 2. Heats of Formation of Gaseous Neutral Species Derived from the Data of Table 1 — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol -1

)

Ref.

C3 HySi+ (CHsfeSiH

C3 H10Si

H 10.78 ±0.07 RPD -42(a) 1421

C3 H9 Si+ (CH^SiC.Hs

C5 H14 Si

c2 h. 10.53 ± 0.09 RPD — 63(a) 1421

C3 HySi + iSO-C3 H7 Si(CH3 )3

CeHieSi

iso- C3 H7 10.56 ±0.16 RPD -72(a) 1421

C3 H9 Si + tert-C4HySi(CH3 )3 C7 H18 Si

tert-C4 Hy 10.53 ±0.09 RPD -83(a) 1421

C3 HySi + (CH3 )3 SiN(C2 H5 ) 2 C7H19SiN

n(C,h,)2 12.61 ±0.03 RPD -98(a) 1421

C3 HySi+ (CHa^SiOSitCH,).,

C3 H9 SiO

OSiiCHafi 15.36 ± 0.13 RPD 13(b) 1421

C3 HySi+ (CHshSiOCHs

C4 H12 SiO

OCHa 12.43 ±0.18 RPD -132(a) 1421

C3 HySi+ (CH3 hSiBr

C3 H9 SiBr

Br 10.69 ±0.06 RPD — 65(a) 1421

CH+ C2 H4 S

cs

CS + 2H 20. 4± 0.5 EVD 53(b) 51

(Ethylene sulfide)

c3 h+ c4 h4 s CHS

CHS 12.8 ± 0.2 EVD 65(b) 2166

(Thiophene)

C2 H+ (CH2 )3 S chs+h2 16.7 ± 0.2 EVD 117(b) 52

(Trimethylene sulfide)

C3 H+ (CH2 )4 S CHS + 2H2 17.2 ±0.2 EVD 134(b) 52

(Tetrahydrothiophene)

C2 H+ (CH2 hS

ch2 s

ch2 s 13. 6± 0.2 EVD 75(b) 52

CH+ (CH3)2 S

ch3 s

ch3 s 13.0 SL 32(b) 307

C3 H+ (u-C3 H7 )2 S

c3 h7 s

u-C3 H7 S? 12.0 SL 39(b) 307

242
TABLE 2. Heats of Formation of Gaseous Neutral Species Derived from the Data of Table 1 —Continued

Other AP or IP Heat of Ion Reactant products (eV) Method formation

(kcal mol -1

)

Ref.

CNS

CH+ CH3 NCS NCS 15.3 ±0.3 EVD 125(b) 315

c2 h+ C2 H5 NCS NCS 12.9 ±0.2 EVD 100(b) 315

C2H3+ C2 H5NCS NCS+H-- 15.6 ± 0.3 LE 99(b) 315

snf7 NF4

'

2 SF5 NF2 SF4 + F? 16.3 ± 0.2 VC — 245(a) 1144

so2 f

NF2f fso2 nf2 FSO- 14.6 ± 0.3 VC -117(b) 1144

so3 F

NF+ fso2 onf2 fso3 13.3 ±0.1 VC -140(b) 1144

302 F2 SO* so2 f2 2F 19.9± 0.3 SL -208(a) 418

CCI3 CC1+ CC13 8.78 ±0.05 EVD 11(a) 441

SiCl3 CH+ CH3 SiCl3 SiCJ, 15.0± 0.2 SL -40(b) 2182

C.H+ C2 H5 SiCl3 SiCl3 12.77 ±0.05 SL -56(b) 2182

c3 h+ i50-C3 H7 SiCl,-5 SiCb 11.36 ± 0.1 SL — 66(b) 2182

PC13

C1+ PC13 PC1+C1 20.2 ±0.4 EVD 39(a) 192

ce2 ci

c2 h+ n-C3 H-Cl CH,C1 12.48±0.1 SL 38(b) 72

c3h+ (SO-C4 H9 C1 CHoCl 11.26 ±0.1 SL 31(b) 72

CH> C2 H5 C1 CH2 C1? 15.9±0.3 VC 81(b) 356

CH+ ch3 coch2 ci C0+CH.C1 13. 9± 0.2 VC 31(b) 2174

CH:t c3 h5 oci C0 + CH2 C1? 14.6 ±0.5 EVD 77(b) 153

(Epichlorohydrin)

C2HC1 C4 H+ C(i Hr,Cl C2 HC1 17.57 ±0.1 SL 124(b) 2103

(Chlorobenzene)

c7h9ci

C5H+ C7 H9 C] c2 h3 ci 9.75 ± 0.15 SL 22(a) 2155

(erce(o-5-Chloro-2-norbornene)

CsH+ c7 h;) ci c2 h3 ci 9.77 ± 0.15 SL 22(a) 2155

(exo-5-Chloro-2-norbornene)

C5H+ C7 Hh C1 c2 h3 ci 10.15± 0.15 SL 13(a) 2155

(3-Chloronort ricyclene)

243
TABLE 2. Heats of Formation of Gaseous Neutral Species Derived from the Data of Table 1 — Continued

Ion Reactant

Other

products

AP or IP

(eV) Method

Heat of

formation

(kcal mol-1

)

Ref.

As2 H4 As+ As2 H4 As + 2H2 14.3 ±0.3 LE 41(a) 2133

CH2 Br

CH+ C2 H5 Br CH2 Br 16.9± 0.3 VC 115(b) 356

ch3+ C3 H5 OBr CO+ CH2 Br? 15.6 ±0.5 EVD 112(b) 153

(Epibromc•hydrin)

C2 HBr

c4h4+ CfiH5 Br C2 HBr 16.77 ± 0.1 SL 118(b) 2103

(Bromobenzene)

Sn2 H6 Sn+ Sn2 H6 3H2 + Sn 10.8 ±0.3 LE 65(a) 2133

C3H9S11

C3 H9 Sn+ (CH3 )3 SnSn(CH3 )3 (CH3 )sSn 9.84 ±0.09 RPD 29(b) 1424

Sb2 H4 Sb+ Sb2 H4 Sb + 2H2 11.5 ±0.3 LE 59(a) 2133

ch2 i

CH+ c2 h5 i ch2 i 16.3 ±0.3 VC 115(b) 356

HgCl

CHJ CH3 HgCl HgCl 14.8 ±0.2 SL 70(b) 306

CH3 Hg

CH+ (CH3 ) 2 Hg CH3 Hg 13. 4± 0.1 SL 76(b) 306

C3 H7 Hg

c3 h+ (t5o-C3 H7 )2 Hg iso-C3 H7 Hg 9.65 ±0.1 SL 45(b) 306

C4H9 Hg

g4h+ (ra-C4 H9 )>Hg n-C4 H9 Hg 10.55±0.1 SL 31(b) 306

PbH4 Pb+ PbH4 H2 + 2H 11.2 LE 64(a) 2116

BiH?

Bi+ BiH:! 3H 13.4 LE 65(a) 2116

244
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255
6. Author Index for Tables 1 and 2

A

Ackerman, M

Ackermann, R. J Akopyan, M. E

Alekseev, N. I Al-Joboury, M. I Anderson, R. C

Amr El-Sayed, M. F

Appell, J Asundi, R, K

Reference 2176

2167

1141,1147,1160,2173

1165

... 92,248,1108,1130

13 1115 2021 3,1029,2032

B

Baba, H

Bafus, D. A

Bakulina, I. N

Baldwin, M

Baranov, V. M

Barrow, R. F

Bartley, W. J Basila, M. R

Bauer, S. H

Bautista, R. G

Beck, D

Bell, W. E

Berkowitz, J Berthier, G

Besenbruch, G.... Beutler, H

Bibby, M. M

Blackburn, P. E.. Blaise, J Blanchard, L. P.. Bloom, H

Bloor, J. E

Blue, G. D

Bonnell, D. W

Botter, R

Botyos, G. L

Baudreaux, E. A.. Brakier, L

Bralsford. R

Brand, J. C. D. . .

Branscomb, L. M

Brehm, B

Briglia, D. D

Brion, C. E

Brown, T. L

Browne, J. C

Buchler, A

Burns, R. P

381,383,384

1 316,317

1390,2146

1006 2149,2150

165 217 219,1109

2165

87,1129

1020,1124

1, 2, 178, 318, 464, 1035, 2050, 2052, 2145, 2179

4 2009

2095

1062,2157

2140

1448,2186

319

2056

1315 318,1104,1105,2165

2105

1400,2022

2155

2168

1197

168 128,204

6 2013

1121 116,305

1 1093 2140

1065, 1155, 2126, 2127, 2128, 2129, 2130, 2188

Reference Cason, C 1372 Chelobov, F. N 1067 Ching, B. K 1235 Chupka, W. A 2, 11,318, 1035,2050,2179

Clancy, D. J 217

Clark, L. B 1420

Clarke, E. M 1094

Clarke, E. W. C 327

Cloutier, G. G 328

Coats, F. H 13

Colin, R 1023, 1243, 1244, 1245, 1255, 2063, 2139

Collin, J. E 14, 17, 58, 62, 164, 166, 169, 462, 1004, 1013, 1072, 1211, 1241,

2031

Comes, F. J 2033,2034

Connor, J. A 2055

Cook, G. L 1039

Cook, G. R 427,1235,1382

Cotter, J. L 1125, 1126, 1127, 1168, 2156

Crable, G. F 1066 Craggs, J. D 439, 440, 1029

Cubicciotti, D 2049

Cullen, W. R 1007 Curran, R. K 20. 185, 196, 200

Cuthbert, J 2016

D

Dauben, H. J., Jr 68 Dawton. R. H. V. M 1149

Degreve, F 1255 DeMaria, G... 333,1065,1155,2126,2128,2129,2138,2151,2152

DeSousa, J. B 141, 145 Dever, D. F 1112 Dewar, M. J. S 1418

Dibeler, V. H 24,

53, 54, 73, 74, 75, 76, 99, 154, 340, 401, 413, 418, 424, 1019.

1118, 1128, 1132, 1136, 1143. 1399, 1400. 2027,2047

Dillard, J. G 1284 Dinneen, G. U 1039

Distefano, G 2025

Ditchburn, R. W 331

Dobrovitskii, M. 1 1067

Dolejsek, Z 2185

Doolittle, P. H 1415 D’Or, L 1197 Dorman, F. H 25,211,212,1111,1378,1404.1451,2014

Dressier, K 1148 Drowart, J 333,

1023, 1065, 1116, 1155, 1243,1245,1255,2063.2123,2126,

2128,2129,2138,2139,2176

Dubov, S. S

Dudek, G. O

Duncan, A. B. F

Dunning, W. J... Durup, J

1067 2155

335

305

2021

C

Cabaud, B 2178

Cairns, R. B 2048

Camus, P 1448

Cantone, B 2023,2026,2174,2194

Carette, J.-D 8

Carroll, S 2105

Carter, G 1062,2157,2192

E

Earnshaw, D. G 1039

Ehlert, T. C 1104, 1105,2148.2161,216?

Ehrhardt, H 1408

Elder, F. A 1068

Eriksson, K. B. S 2199

Ettinger, R 314

Exsteen, G 1244. 1245, 2123

256
F

Reference Farmer, J. B 59,108,441

Farrell, P. G 1281 Farren, J 2016

Fehlner, T. P 1024, 1119, 1407, 2030

Field, F. H 2101,2102,2114

Finan, P. A 2036

Finch, A. C. M 2037

Fineman, M. A 1251,2180,2191

Finney, G 2055

Fischler, J 1036

Fisher, I. P 29, 1079, 1455,2164

Flesch, G. D 30,2053

Foffani, A 2023, 2025, 2026, 2174, 2194

Foner, S. N 31 . 33, 34, 35, 36, 37, 67

Fox, R. E 39, 196, 198, 199

Franklin, J. L 154,

340, 418, 424, 1100, 1237, 1238, 2047, 2102, 2105, 2114,

2136

Fred, M 341

Friedland, S. S 1131 Friedman, L 46, 357

Frost, D. C 49, 61, 286, 287, 288, 289, 292, 463, 1007, 1050

Fueki, K 2038

Fukui, K 473

Reference Hirota, K 171,1254,1256

Hisatsune, I. C 139 Hobrock, B. G 82, 83, 84, 176, 186, 188, 191, 193, 202, 315

Hobrock, D. L 43,1110

Homer, J. B 2164

Honnen, L. R 68 Huber, K. P 1217 Hudson, R. D 1189 Hudson, R. L 31,33,34,36,37,67

Hurzeler, H 86,213

1

Iczkowski, R. P 355

Inghram, M. G 86,

95, 213, 333, 1065, 1068, 1099, 1120, 1155, 2050, 2126,

2127,2128,2130,2138,2188

Innorta, G 2025

Inokuchi, H 1459

Ionov, N. 1 317

Irsa, A. P 356,357

Isberg, H. B. S 2199

J

G

Gallegos, E. J —

Giese, C. F

Gillis, R. G

Gingerich, K. A.. Godpole, E. W... Gowenlock, B. G

Grasso, F

Green, J. W

Grimley, R. T...

Guffy, J. C

Guido, M

50,51,52,218

1068,1120

2171 2054,2152

1059 303,304,306,307

2023,2026,2174,2194

1104,1105,2165

2127,2129,2130,2188

2066

2151

Jackson, D. S 1133 Jacobson, A 1131 James, L. H 2192

Jennings, B. H 2155

Johns, J. W. C 1109,2149

Jones, E. G 1413

Jones, P. P 303

Jortner, J 2181

Joy, H. W 1164,1439

Junger, H.-O 2095

Junk, G 88

,Jursa, A. S 148,149,409,410,1097,1103

K

H

Hagemann, R 2022,2172

Hall, L. H 1102 Halmann, M 1036,1101

Hamill, W. H 119,160,224,2018,2154,2158

Hammond, V. J 344

Hanson, H. P 1094

Hanus, V 2185

Harada, Y 1459

Harllee, F. N 1128

Harris, P. V 168

Harrison, A. G 68,

69, 70, 71, 72, 122, 123, 210, 339, 1122, 1413, 2144, 2163

Hassan, G. E. M. A 2177

Hastie, J. W 2056

Haszeldine, R. N 2055

Hatada, M 171,1254,1256

Haynes, P 1122 Haynes, R. M 306

Heath, G. A 1455

Heitz, F 2021 Henderson, I. H. S 108,441

Hernandez, G. J 2169,2170

Herron, J. T 73, 74, 75, 76, 77, 78, 79

Herzberg, G 349, 1078, 1109

Hess, G. G 1421

Higasi, K 381,383,384,431

Higuchi, J 353

Hildenbrand, D. L 1106,1297,2040,2141,2142

Kandel, R. J Kaminskii, D. L

Kana’an, A. S

Kaneko, Y

Kanomata, I Kasha, M

Kato, H

Kaufman, J. J Kay, J..... Kearns, G. L

Kebarle, P

Kent, R. A

Kerwin, L

Khvostenko, V. I King, A. B

Kirkien-Konasiewicz, A

90

1165 2009

1012 2196

1115

' ' ' ' 473

189 ' 205j 2061 209! 1077, 2184

307

1066 69,141,1059

1249, 1280, 1458, 2009, 2161, 2162

8 2159,2166

2153

1390

Kiser, R. W 43,

50, 51, 52, 82, 83, 84, 104, 112, 115, 139, 153, 176, 186, 188, 191, 192, 193, 201, 202, 218, 315, 1033, 1107, 1110, 1284,

1381,2045

Kistiakowsky, G. B 2 Kitagawa, T 1459 Kitamura, M. Y 117

Klein, Y 1101 Kodera, K 1459

Koski, W. S 189, 205, 206, 209, 1024, 1 102, 1 1 19, 2030

Krauss, M 340,1118,1128,1143

Kreuzer, H 362

Krupenie, P. H 2098

Kuhns, L. J 189 257
Kuppermann, A

Kurbatov, B. L.. Kurepa, M. V... Kuroda, H

Kybett, B. D

Reference 2187

.. 1159,1167

3, 1029, 2032

1064

2105

L

Lambdin, W. J 97 Lampe, F. W 1139, 1421, 1424, 2101, 2102

Laune, J 1146 Law, R. W 364

LeBlanc, F. J 148, 149, 409. 410

Lee, P. K 2054

Lefebvre-Brion, H 1268

LeGoff, P 319

Leigh, G. J 2055

Lessmann, W 2033,2034

Lifshitz, C 219,419, 1288, 1290, 1419

Lindeman, L. P 2066

Lindholm, E 28

Linevski, M. J 1112

Lofthus, A 2100

Long, F. A 46,419, 1288, 1290, 1419

Lorquet, J. C 1352,2020,2029

Lossing, F. P 17, 29, 58, 59, 62, 70, 71, 108, 120, 123, 124, 125, 126, 141, 145,

151, 165,441,462, 1011, 1079,2164

Loughran, E. D 100 Lowrey, A., Ill 101

Lustig, M 1144

Murad, E

Murakawa, K

McCollum, J. D.. McDonald, J. D.. McDowell, C. A..

McGee, H. A., Jr McGowan, J. W..

McKinley, J. D... McLean, S

Reference 95,1099,1297,2141

1286

2109

1458,2009

49,

61, 108, 286, 287, 288, 289, 292, 327, 463, 1050

42,2143

1094,1251

2125,2132

1122

N

Nagels, M 1211 Nagoshi, K 171 Nakayama, T 117,161,182,1022

Nall, B. H 35 Namioka, T 162,2099

Natalis, P 1145, 1146, 1182, 1183, 1184, 1237, 1238, 2028, 2105

Newton, A. S 1040,1264

Newton, J 1281

Nichols, L. D 1076,2182

Nicholson, A. J. C 25. 282, 1032, 1253, 2014

Nief, G 2022

Norman, J. H. 1020,1124,2131

Nozoe, T 431

Nuert, H 1338

o

M

Maccoll, A 1390,2146

Mader, C 100

Majer, J. R 298, 299, 301 , 303, 304, 306, 307, 308

Malaspina, L 2151,2152

Malone, T. J 42,2143

Mann, D. E 53,1112

Mann, J. B 16 Mann, K. H 1047 Margrave, J. L 102,

103, 214, 318, 355, 364, 1104, 1105, 1249, 1280, 1458, 2009,

2105, 2148, 2161, 2162, 2165

Marmo, F. F 133 Marquart, J. R 178

Marriott, J 439, 440

Marsden, D. G. H 441

Martignoni, P 1372

Martin, R. H 1139 Matsen, F. A 348

Matsunaga, F. M 190

May, D. P 92, 1108,2015

Melton, C. E 119,224,1164,1439,2154,2158

Mesnard, G 2178

Metzger, P. H 1382 Meyer, F 122,1122,2144,2163

Meyerson, S 2108,2109

Miescher, E 1148

Miller, S. 1 2146

Mohler, F. L 24, 1132 Momigny, J 114,

268, 1051, 1058, 1172, 1185, 1190, 1197, 1406,2103

Moore, C. E 2113

Morgan, R. L 1372

Morrell, F. A 411

Morrison, J. D 25, 86, 211, 212, 213, 282, 2014

Moser, C. M 1268

Moser, H. C 192

Mottl, J. R 159, 182 Munson, M. S. B 1100,2136

Occolowitz, J. L 2171 Ogawa, M 163, 1179, 1382, 2099

Olmsted, J., Ill 1264

Omura, 1 194, 195, 381 , 383, 384, 431 Osberghaus, O 1129

P

Pachucki, C. F 206, 209

Palmer, T. F 120, 1011, 1079

Passmore, T. R 1091

Patrick, C. R 298,299,301,308

Paulett, G. S 314,1144

Petrocelli, A. W 2180,2191

Pignataro, S 2023, 2025, 2026, 2174, 2194

Platel, G 2001

Porter, R. F 174, 397, 2175

Pottie. R. F 123, 124, 125, 126, 1252

Powell, W. A 411 Prahallada Rao, B. S 2016

Prppnp TT R 901 (\ Price, W. C 168,344,387, 1091, 1114,2064,2065

Prinzbach, H 2185

R

Radwan, T. N 1441

Raff, L. M 2187

Rapp, D 1121 Rauh, E. G 2167

Rebane, T. K 1006 Reed, R. 1 127, 128, 129, 130, 131, 132, 204, 2036

258
Reference Reese, R. M 24, 53, 54, 99, 154. 340, 401, 418, 424, 1019, 1118, 1128, 1132,

1136, 1143, 2047

Resnik, F. E 411

Rice, S. A 2181 Robb, J. C 298

Robinson, P. J 2055

Rona, P 1418 Rosenstock, H. M 1400

Roth, E 2022

Rowlinson, H. C 2150

Ryabchikov, L. N 2195

Rylander, P. N 2108,2109

Reference Tickner, A. W 1047

Tikhinskii, G. F 2195

Tikhomirov, M. V 1067 Tomkins, F. S 341

Toubelis, B. J 2157

Tsuda, S 160, 2018, 2154

Tuffly, B. L 97 Turner, D. W 92,248,1108,1130,1441,2015

u

Urbain, J 1406 Uzan, R 2178

•s

Saalfeld, F. E 173,2002,2116,2133,2137

Samson, J. A. R 133,163,427,2048

Sandoval, A. A 192

Saul, A. M 2040

Saville, B 1390

Schiff, H. 1 77,79,328, 1133

Schissler, D. O 135 Schoen, R. 1 1415

Schonheit, E 2200

Schoonmaker, R. C 174,397

Sedgwick, R. D 2055

Seshadri, K. S 1112 Shannon, T. W 72 Shenkel, R. C 193,315

Shipco, F. J 209

Sholette, W. P 2175

Shoosmith, J 349

Simmons, R. F 2055

Sjogren, _H 28,2060

Snedden, W 129, 131, 132,2036

Snelling, D. R 304

Sommer, L. H 1421 Stafford^. E 1116,2052,2176

Staley, H. G 1020,1124,2131

Stauffer, J. L 2140

Stebbings, R. F 1094

Steele, W. C 1075, 1076, 2155, 2160, 2182, 2183

Steigman, J 1131

Sterner, B 1068, 1120 Stevenson, D. P 135

Stone, F. G. A 1075, 1076,2182,2183

Strakna, R. A 1131

Street, K 1264

Streitwieser, A., Jr 136

Stirber, F. A 1240 Subbanna, V. V 1102

Sultanov, A. Sh 2159

Sun, H 138 Svec, H. J 30, 88, 173, 2002, 2053, 2116, 2133, 2137

Y

Van Brunt, R. J 2112 Van Raalte, D 210,339

Varsel, C. J 411 Verhaegen, G 1116,1243,1244,1255,2123,2176

Vetter, R 2186

Vilesov, F. 1 1140,

1141, 1142, 1147, 1159, 1160, 1166, 1167, 2173

Vroom, D 1050 w

Wacks, M. E 413,1069,2112

Wada, Y 115,153,1033,2045

Waddington, T. C 1414 Wainfan, N 230

Waldron, J. D 414 Walker, J. A 1399,1400,2027

Walker, W. C 155, 156, 157, 230

Walsh, A. D 261, 269,344, 1070 Wankenne, H 1406 Warsop, P. A 1070 Watanabe, K 101,

117, 133, 158, 159, 161, 162, 182, 416, 1022, 1103, 2059

Weissler, G. L 138, 155, 156, 157, 163, 230

Westmore, J. B 1047 Wexler, S 464

White, D 1112 Wrberg, K. B 165 Wilkinson, K. L 1149 Wilkinson, P. G 422,423

Wilson, E. G 2181 Wilson, J. M 2036

Winters, R. E 112,1107,1381

Wirtz-Cordier, A. M 1185 Wolfsberg, M 46 Wood, R. W 1114 Wright, S. S 205

T

Taft, R. W 1139 Tanaka, Y 148, 149,409,410, 1097, 1115, 1179,2099

Tasman, H. A 2179

Taubert, R 151 Teegan, J. P 269,344

Tekaat, T 1408

Terenin, A. N 1147,1159,1166,2173

Theard, L. P 1106,2040,2142

Thorburn, R 1246 Thorn, R. J 2167

Thornley, M. B 130 Thrush, B. A 2189

Y

Yarborough, V. A 97 Yergey, A. L 1424 Yonezawa, T 473

z

Zaitsev, V. M 1140

Zelikoff, M 2059

Zwolenik, J. J 2189

259
7. Appendix 1. Heats of Formation Used in Tables 1 and 2

This appendix contains the auxiliary heats of formation used in calculating

the heats of formation presented in tables 1 and 2. It is not intended to be a critical

compilation. Many values are only estimates and no attempt has been made to insure internal consistency.

Appendix 1. Heats of Formation Used in Tables 1 and 2

Formula Description AHf298 (g) Reference

(kcal mol -1

) H H 52.095 7007

H- H- 33.39 7007

D D 52.981 7007

HD HD .076 7007

Li Li 38.41 7004

Li2 Li2 50.4 7004

LiH LiH 32.1 7004

Be Be 78.0 7140

B B 134.5 7007

b2 b2 198.5 7007

BH BH 107.46 7007

bh2 bh2 48 7004

bh3 bh3 24 7007

b2 h6 b2 h6 8.5 7007

B4 H10 B4 H10 15.8 7007

b5h9 b5 h9 17.5 7007

b5 h„ b5 h„ 24.7 7007

BeHio BeHjo 22.6 7007

B10H14 B10H14 7.54 7007

C C 171.291 7007

c- c- 140.5 7004

c2 c2 199 7004

c3 c3 189.7 7004

c4 c4 242.3 7004

c5 c5 242.4 7004

CH CH 142.4 7007

ch2 ch2 93.7 7007

ch3 ch3 33.2 7007

ch4 ch4 -17.88 7007

c2 h c2 h 112 a 7036

c2 h2 c2 h2 54.19 7007

c2 h3 c2 h3 65 7039

c2 h4 c2 h4 12.49 7007

c2 h5 c2 h5 25 7007

c2 h6 c2 h6 -20.24 7007

c3 h3 ch2 c=ch 75 a 7136

C3 H4 ch2=c=ch2 45.9 7045

C3H4 cyclopropene 66.6 7055

C3 H4 CH3 C=CH 44.319 7045

c3h5 ch3 c=ch2 58 b 7057

C3 H5 ch2 ch=ch2 30 7048

C3H5 cyclopropyl radical 68 a 7031

c3h6 ch3 ch=ch2 4.88 7045

c3 h6 cyclopropane 12.74 7058

c3h7 n-C9 H7 22.1 7084

c3 h7 150-C3H7 16.8 7130

c3 h« c3h« -24.82 7045

260
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description &Hf298 (g) Reference

(kcal mol -1

) c4 h2 CH=CC=CH 102 8 7036

C4H4 ch2=chc=ch 69 ( h

) c4 h5 CH3 CHOCH 67 ( h

) C4 Hb CH2=CHCH=CH2 26.33 7045

c4 h6 c2 h5c=ch 39.48 7045

C4 H6 CH3 OCCH3 34.97 7045

c4 h6 ch3 ch=c=ch2 38.77 7045

c4 h7 CH3 CH=CHCH2 26 a 7075

c4 h7 ch>=chchch3 20 ( h

) c4 h7 CH^ClCHalCH, 21 a 7075

G,H8 m-2-C 4 H8 -1.67 7045

c4 h8 trans-2-C4 H8 -2.67 7045

c4 h8 methylcyclopropane 6.4 0

c4 h8 i-c4 h8 -.03 7045

c4 h8 cyclobutane 6.3 7077

c4 h8 150-C 4 H8 -4.04 7045

c4 h9 n-C4 H9 18.5 7084

c4 h9 sec-C 4 H9 8.83 ( h

) c4 h9 7so-C4 H9 12.67 ( h

) c4 h9 tert-C4 H9 4.5 7084

C4 H,o n-C4 Hio -30.15 7045

C4 Hio iso-C 4H10 -32.15 7045

c5 h6 cyclopentadiene 31.84 7112

c5 h8 cyclopentene 7.87 7045

c5 h8 CH2=C=C(CUsh 31.0 7045

c5 h8 CH^CHQCH^CH, 18.1 7045

c5 h« C2 H5 CH=C=CH2 34.80 7045

c5 h« ch2=chch2 ch=ch2 25.1 ( h

) C5 Es ct5 -CH3 CH=CHCH=CH2 18.7 7045

c5 h8 trarcs-CH3 CH=CHCH=CH2 18.6 7045

c5 h8 CH^H-C^CHCHa 33.10 7045

c5 h9 (CH3 ) 2 C=CHCH2 15 ( h

) c5 h9 ch3 ch=chchch3 13 ( h

) C5 H,o cyclopentane -18.46 7045

c5 h10 (CH3 >2 C=CHCH3 -10.7 7045

c5 h10 I-C5H10 -5.00 7045

c5 h10 cis-2 -C5 H10 -6.71 7045

c5 h10 tran5-2-C.5Hio -7.59 7045

c 5 h10 C2 H5 C(CH3 )=CH2 - 8.68 7045

c5h10 (CH3 >2 CHCH=CH2 -6.92 7045

c5 h10 1 , 2 -dimethylcyclopropane 0 0

c5 h„ (C2 H5 >2 CH 3.9 ( h

) C5 Hu n-C3 H7 CHCH3 5.9 ( h

) c5 h„ t5o-C3 H7 CHCH3 2.6 ( h

) c5 h„ n-CsHn 9.1 ( h

) C5 Hu C2 H5 CH(CH3 )CH2 7.7 ( h

) C5H11 neo-CsHn 4 7096

C5H1, tert-C5H11 1.0 7096

c5 h„ iso-CsHn 7.7 ( h

) c5 h12 n-C5 H12 -35.00 7045

c5 h12 i5 o-C5 Hi2 -36.92 7045

c5 h12 neo-CsHio -39.67 7045

c6 h4 benzyne 164 a 7186

c6 h5 phenyl radical 72 7263

CbH6 ch=cch=chch=ch2 88.4 ( h

) c6 h6 ch3 ococch3 89.2 ( h

) c6 h6 benzene 19.8 7045

261
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description 298(g)

(kcal mol -1

) Reference

c«h6 ch=cch2 ch2 c=ch 98.9 ( h

) c«h6 C2H5 C=CC=CH 94.12 ( h

) C6 H6 ch3 c^cch2 c^ch 94 ( h

) c6 h« ch2=chch=chch-ch2 49 ( h

) c6 h8 1-methylcyclopentadiene 24 ( h

) c6 h8 2-methylcyclopentadiene 24 ( h

) C6 H,o cyclohexene -2 ( h

) CeHi2 1 "Ct;H 12 -9.96 7045

C(>Hi2 cyclohexane -29.43 7045

CfjH 1 2 methylcyclopentane -25.5 7045

c6 h12 CH2=CHC(CH3 )3 -14.25 7045

c6 h12 (CH3 ) 2 C=C(CH3 )2 -15.91 7045

C<;Hi3 n-C«H13 4.2 ( h

) C(jHi4 (CH3 )2 CHCH(CH3) 2 -42.49 7045

CeH]4 (C2 H5 )2CHCH3 -41.02 7045

C«H,4 C2 H5 C(CH3 )3 -44.35 7045

C8 Hl4 u-C«H14 -39.96 7045

C6 H,4 -41.66 7045

c7 h7 benzyl radical 37.5 7107

c7 h7 cycloheptatrienyl radical 65 7112

c7 h8 spiroheptadiene 52.0 g 7108

c7 h8 cycloheptatriene 43.47 7109

c7 h8 toluene 11.95 7045

c7 h8 bicyclo(3.2.0)heptadiene-2,6 62.3 a 7110

c7 h8 bicyclo(2.2.1)heptadiene-2,5 66.8 7226

c7 h10 1 ,3-cycloheptadiene 22.1 7110

C7 H,o bicyclo(3.2.0)heptene-6 30 a 7110

C7 H,o 1 ,2-dimethylcyclopentadiene 17.2 ( h

) C7 H,o 2,3-dimethylcyclopentadiene 17.2 ( h

) c7 h10 5,5-dimethylcyclopentadiene 16.6 ( h

) c7 h10 norbornene 31 a 7227

c7 h12 4-methylcyclohexene -7.5 ( h

) C7 H,4 methylcyclohexane -36.99 7045

C7 H,4 cycloheptane -28.52 7109

c7 h15 (C3 H7 ) 2 CH -44.1 0)

C7 Hi6 n-C7 Hie -44.89 7045

C8 Hh phenylacetylene 76 ( h

) c8 h8 cubane 148.7 7111

c8 h8 cyclooctatetraene 71 ( h

) c8h8 styrene 37 ( h

) c8 h9 m-methylbenzyl radical 29.6 0

c8h9 p-methylbenzyl radical 29.6 0)

c8h10 2-methylspiroheptadiene 44.1 g 7108

c8 h10 6-methylspiroheptadiene 45.4 g 7108

C8Hio o-xylene 4.54 7045

C 8 Hio m-xylene 4.12 7045

c8 h10 p-xylene 4.29 7045

C8 H,o CH2=C(CH3)C^CC(CH3 >=CH2 68.2 g 7108

C8 H,o 1-methylspiroheptadiene 44.1 g 7108

U8 H10 7-methylcycloheptatriene 37.19 g 7112

CsHjo ethylbenzene 7.120 7045

c8 h12 4-vinylcyclohexene 17.6 ( h

) C8 H,2 1,2 ,3-trimethylcyclopentadiene 10.3 ( h

) c8 h12 1 ,5,5-trimethylcyclopentadiene 8.9 ( h

) C8 Hi6 trans-\ ,2-dimethylcyclohexane -43.02 7045

262
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298 ( g)

(kcal mol -1

)

Reference

CsHie cis- 1 ,2-dimethylcyclohexane -41.15 7045

CsHie cyclooctane -30.06 7109

c8 h17 n-C8 Hi 7 -5.7 ( h

) CyHis i5 o-C4 H9 C(CH3 )3 -53.57 7045

ChHih n-C8 Hi8 -49.82 7045

c9 h7 y-phenylpropargyl radical 92 ( h

) C9 H8 methylphenylacetylene 65.9 ( h

) C9 Hh indene 42.8 ( h

) C9 H,o a- methylstyrene 27.00 7045

c9 h12 1,2,4-trimethylbenzene -3.33 7045

c9 h12 p-ethyltoluene -.8 ( h

) c9 h, 2 isopropylbenzene .940 7045

c9 h 12 1 ,2,3-trimethylbenzene -2.29 7045

c9 h12 n-propylbenzene 1.870 7045

c9 hI2 1,3,5-trimethylbenzene -3.84 7045

C9 Hi4 1,2,3,4-tetramethylcyclopentadiene 1.3 ( h

) C9 H,4 1,4,5,5-tetramethylcyclopentadiene 1.3 ( h

) U9 Hi6 hexahydroindane -34 ( h

) c9 h19 n-C9 Hj 9 -10.6 ( h

) c9 h20 n-C9 H2 o -54.74 7045

CioHk naphthalene 33.0 c 7113, 7114

C.oHh azulene 72.5 7187, 7188

C10H13 p-isopropylbenzyl radical 17 0

Ck)Hi 4 1,2,4,5-tetramethylbenzene -10.95 0

C10H14 3,5-dimethylethylbenzene -8.77 0

C]<)Hl 4 1 ,2,3,5-tetramethylbenzene -10.33 0

Ci()Hl 4 2,5-dimethylethylbenzene -7.33 0

c 10h14 ^eri-butylbenzene -7 ( h

) CioHm 5ec-butylbenzene -4.2 ( h

) Ck*Hi4 n-butylbenzene -3.3 7045

Cl()Hi 4 3,4-dimethylethylbenzene -8.01 C)

U1 0 H1

1 ,2,4,5 ,5-pentamethylcyclopentadiene -6.3 ( h

) C10 Hi6 1,2 ,3 ,5 ,5-pentamethylcyclopentadiene -6.3 ( h

) U10H18 £rans-decaline -43.54 7154

Cl()Hl8 Ci5-decaline -40.45 7154

C,oH22 n-CioH22 -59.67 7045

CnHio 2-methylnaphthaiene 25.4 C)

CnHio 1-methylnaphtbalene 25.4 0

UnHie pentamethylbenzene -27.2 ( h

) c„h18 hexamethylcyclopentadiene -13.9 ( h

) C, l H23 n-Ci 1 H23 -20.5 ( h

) CnH24 n-Cn H04 -64.6 7045

c 12 h1(, biphenyl 39.5 c 7059, 7106

c12 h12 1 ,2-dimethylnaphthalene 17.8 0

C12 H,8 hexamethylbenzene -29 ( h

) c12 h2 « n-Ci2 H26 -69.52 7045

c13 h10 fluorene 43.8 ( h

) c 13 h„ diphenylmethyl radical 48 ( h

) Ci 3 H27 n-Ci3 H27 -30.4 ( h

) c13 h28 n-C 13 H28 -74.45 7045

C14H10 diphenylacetylene 99 ( h

) C14H10 anthracene 53.8 c 7114, 7115

C14H10 phenanthrene 47.7 c 7114, 7115

C14H14 dibenzyl 27.8 7116

263
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A//j29s(g) Reference

(kcal mol -1

) C 14 H30 n-Ci4H3o -79.38 7045

C 15 H31 n-Ci5H3 i -40.2 ( h

) C15 H32 n-Ci5H32 -84.31 7045

C 16 H33 n-Ci 6 H33 -45 ( h

) C16 H34 n-Ci 6 H34 -89.23 7045

C 17 H36 n-Ci7H36 -94.15 7045

CigHi2 1 , 2 -benzophenanthrene 66.3 c - d 7059

C18 H30 3-phenyldodecane -43.7 ( h

) C18 H30 1 -phenyldodecane -43.7 ( h

) C18 H38 /i-CisHss -99.04 ( h

) C19 H32 7-phenyltridecane -48.6 ( h

) C19 H38 I-C19H38 -74.01 ( h

) C26 H46 1 -phenyleicosane -81.79 ( h

) C26 H46 2 -phenyleicosane -83.14 ( h

) C26H46 3-phenyleicosane -83.14 ( h

) C26 H46 4-phenyleicosane -83.14 ( h

) C26 H46 5-phenyleicosane -83.14 ( h

) C26 H46 7-phenyleicosane -83.14 ( h

) C26 H46 9-phenyleicosane -83.14 ( h

) CB CB 199 d 7007

GT\ cb2 183 d 7007

C2 B c2 b 183 d 7007

C2 H5 B c2 h5 b -41.4 0

C3 H9 B (CH3 )3 B -29.7 7007

c6 h15 b (C2 HO3 B -37.69 7007

N N 112.97" 7007

N N(2 D) 167.9 7007, 7241

N N(2 P) 195.4 7007, 7241

NH NH 79 7007

nh2 NH, 41 7007

nh3 nh3 - 11.02 7007

N2 H2 N2 H2 48.7 a 7167

N2 H3 N2 H3 87 a 7071

N2 H4 N2 H4 22.80 7007

n3 h hn3 70.3 7007

CN CN 100 7138

c2 n c2 n 123 a 7030

c3 n c3 n 131 a 7030

c4 n c4 n 166 a 7030

c5 n c5 n 216 a 7030

c6 n c6 n 233 a 7030

C2 N2 C2 N2 73.84 7007

C4 N2 CNC=CCN 128 7030

c6 n2 CM>CC=CCN 183 e 7030

CHN HCN 32.3 7007

CH4 N CH2 NH2 36.8 ( h

) CHjN CH3 NH 37 7132

ch5 n CH3 NH2 -5.49 7007

C2 H3 N CH3 NC 35.6 7007

C2 H3 N CH3 CN 20.9 7007

C2 H5 N ethylenimine 26 7129

C2H5N CH2=CHNH2 5.5 ( h

) C2 H6 N (CH3 )2 N 34 7132

c2 h6 n C2 H5 NH 33 7132

c2 h-n (CH3 >2 NH -4.41 7007

C2 H7 N C2H5NH2 -11.27 7007

264
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298 (g) Reference

(kcal mol -1

) C3 HN CH=CCN 91 ^030

C3H3N ch2 =chcn 44.5 ( h

) C3H5N c2 h5 nc 31 0)

C3H5N c2 h5 cn 15.9 (

l) c3 h7 n azetidine 15.5 e 7060

c3 h9 n (CH3 )3N -5.81 7007

c3 h9 n i5o-C3 H7 NH2 -18.5 ( h

) c3 h9 n n-C3 H7 NH2 -17.3 c 7059

C4H5N cyclopropyl cyanide 43 K 7031

C4H5N CH2 =CHCH2 CN 41.4 ( h

) C4H5N pyrrole 25.88 7240

c4 h«n (CH3 )2 CCN 28 ( h

) c4 h7 n n-C3 H7 NC 26 C)

c4 h7 n n-C3 H7 CN 10.9 ( h

) c4 h9 n pyrrolidine -2 7085

c4 h10 n (C2 H5 ).2 N 38 b 7139

c4 h„n (C2 H5 )2 NH -21.4 c 7059

c4h„n £e7t-C4 H9 NH2 -26.2 ( h

) c4 h„n i50-C4 H9 NH2 -23.3 ( h

) c4 h„n secC

4 H9 NH2 -24.1 ( h

) C4 HnN n-C4 H9NH2 -21.9 ( h

) C5H5N5 pyridine 33.63 7143

C5 HuN piperidine -10 c - d 7059

c6 h4 n cyanocyclopentadienyl radical 49.3 ( h

) c6 h7 n aniline 24.8 ( h

) c6 h7 n 2-picoline 24.38 7143

c6 h7 n 3-picoline 27.16 7143

c6 h7 n 4-picoline 24.43 7143

c6hI3 n cyclohexylamine -23.4 ( h

) c6 h13 n hexamethylenimine -12 ( h

) c6 hI5 n (n-C3 H7 )2 NH -27.9 ( h

) c6 h15 n (i50-C3 H7 )2 NH -30.7 ( h

) c6 h15 n (C2 H5 )3 N -26 ( h

) c7 h5 n benzonitrile 53.3 ( h

) c7 h8 n aminobenzyl radical 41 ( h

) c7 h9 n /V-methylaniline 23.9 ( h

) c7 h9 n ra-toluidine 15.9 ( h

) c7 h9 n p-toluidine 15.9 ( h

) c7 h9 n o-toluidine 16.9 ( h

) c7 h9 n benzylamine 19.9 ( h

) c7 h9 n 2,3-lutidine 14.2 c - d 7059

c7 h9n 2,4-lutidine 14.2 c * d 7059

c7 h9 n 2,6-lutidine 13.43 7143

c8 h6 n cyanobenzyl radical 69 ( h

) c8 h7 n benzyl cyanide 42 c ’ d 7059

c8 h7 n m-tolunitrile 48 c - d 7059

c8 h7 n p-tolunitrile 48 c > d 7059

c8 h„n ,/VyV-dimethylaniline 20.96 ( h

) c8 h„n yV-ethylaniline 18.9 ( h

) c8 h19 n (n-C 4 H9 >2 NH -37.8 ( h

) c9h13 n yV,./V-dimethyl-p-toluidine 13.84 ( h

) c9h13 n A^jV-dimethyl-m-toluidine 13.84 (h

) c9 h13 n ./V-ethyl-/V-methylaniline 16.03 ( h

) c9 h13 n /V-n-propylaniline 14.0 ( h

) c9 h13 n AVV-dimethyl-o-toluidine 15.84 ( n

) c9 h21 n (n-C3 H7 )3 N 40.7 ( h

)

265
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298 ( g) Reference

(kcal mol -1

) C 10 H15 N AC/V-dimethyl-p-ethylaniline 6.91 ( h

) c,0 h15 n 7V,/V,3,5-tetramethylaniline 5.2 0

C,oH, 5 N A^,A^,2,6-tetramethylaniline 6.8 0

C,oH 15 N N,N,2 ,4-tetramethylaniline 5.8 0

C10 H15 N AC/V-diethylaniline 10.9 ( h

) c10 h15 n A^-u-butylaniline 9.1 ( h

) c„h17 n /V,./V-dimethyl-p-isopropylaniline 2.63 ( h

) c„h17 n AC/V-diethyl-p-toluidine 3.98 ( h

) c12 h„n diphenylamine 56 ( h

) cI 2 h19n /V,/V-di-n-propylaniline 2.86 ( h

) c12 h19 n AVV-dimethyl-p-terf-butylaniline -5.6 ( h

) c 14 h23 n AC/V-di-n-butylaniline -7.0 ( h

) c, 8 h15 n triphenylamine 84.8 ( h

) ch2 n2 diazomethane 49.3 a 7183

ch2 n2 diazirine 79.3 a 7183

ch6 n2 ch3n2 h3 22.55 7007

c2 h6n2 ch3n=nch3 . 43 7215

c2 h,n2 1 , 1 -dimethylhydrazine 19.7 7029

c2 h8n2 1 , 2 -dimethylhydrazine 21.6 7029

C3 HioN2 (CH3)3 N2 H 19.2 g 7071

C4H4N2 metadiazine 46.99 7141

c4 h4 n2 paradiazine 46.86 7141

c4h4n2 orthodiazine 66.53 7141

c4h10n2 C2 H5 N=NC2 H5 33 7223

c4 h12 n2 (CH3 )4 N2 16.6 8 7071

c4 h,2 n2 1 , 1 -diethylhydrazme 9

b 7142

c5h6 n2 4-aminopyridrne 37.4 0

c3 h14 n2 1 -methyl-l-n-butylhydrazrne 4

b 7142

c6h8 n2 benzenediamine 30.0 ( h

) c6 h8 n2 phenylhydrazine 57.0 0

c6 h14 n2 (iso-C3H7)2 N2 19.4 7102

CioHieNo p-6is(dimethylamino)benzene 20.9 ( h) CH3N3 CH3N3 57 c - 8 7024

0 0 59.553 7007

0 O0D) 104.9 7007, 7241

0 OOS) 156.17 7007, 7241

0

- 0

- 24.29 7007

03 03 34.1 7007

HO OH 9.31 7007

HO' OH- -33.67 7007

h2 o H2 0 -57.796 7007

d2 o d2 o -59.560 7007

ho2 ho2 5 7166

h2 o2 h2 o2 -32.58 7007

LiO LiO 20.1 7004

Li2 0 Li2 0 -39.9 7004

BeO BeO 31 7004

Be2 0 Be2 0 -18 7140

Be2 02 Be2 02 -102 7140

Be3 03 Be303 -260 7140

CO CO -26.416 7007

C02 C02 -94.051 7007

C3 02 c3 o2 -8.3 7004

NO NO 21.57 7007

n2 o n2 o 19.61 7007

no2 no2 7.93 7007

266
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A//;298 ( g ) (kcal mol -1

) Reference

B3 H3 O3 B3H303 -289 7007

CHO CHO -4.12 7007

ch2 o ch2 o -28 7007

CH3 O CH30 -.5 7184

CH4 O CH30H -47.96 7007

c2 h2 o ch2 co - 14.6 7007

c2 h3 o CH3 CO -4.5 7007

c2 h4 o CH3 CH0 -39.72 7007

c2 h4 o ethylene oxide -12.58 7007

C2 H5 0 c2 h5 o -8.5 7048

c2 h«o CH30CH3 -43.99 7007

c2 h«o C2 H50H -56.19 7007

c3h4o ch2 =chcho -23 d 7018

C3H50 ch3 coch2 -7.7 ( h

) c3 h6 o propylene oxide -22 7061

c3 h6 o CH2=CHCH2 OH -32.'3 d 7018

c3 h6 o c2 h5 cho -48.7 7018

c3h6o ch2=choch3 -27.7 7018

C3 H6 0 CH3 COCH3 -51.8 ( h

) c3 h6 o trimethylene oxide -24 8 7060

c3 h8 o n-C3H7 OH -62.3 7018

c3h8 o iso-CskjOH -65.6 7018

C3 HhO CH3 OC2 H5 -52.1 c 7059

c4 h4 o furan -8.29 7073

c4 h4 o CH3COC=CH 11 ( h

) c4 h6 o 3 ,4-epoxy- 1 -butene 10 8 7014

c4 h6 o CH3CH=CHCHO -30.0 d 7018

c4 h6 o ch3 coch=ch2 -26.72 ( h

) c4 h8 o tetrahydrofuran -43.08 7079

c4 h8 o WO-CsHyCHO -55.33 ( h

) c4 h8 o C0 H5 COCH3 -58.37 7258

c4h8 o n-C3 H7 CHO -53.7 ( h

) C4 Hi0O n-C4 H9 OH -66.5 e 7046, 7086

C4Hi 0O n-C3 H7 OCH3 -60 0

C4 Hi0O 56C-C4 H9 OH -71.2 (h

) C4Hi0 O c2 h5 oc2 h5 -60.26 7007

c5 h8 o 1 -methylfuran -16 0

c5 h6 o 2 -methylfuran -16 0) c5 h8 o cyclopentanone -46.31 7259

c5 h8 o dihydropyran -28.5 7079

c5 h10o /i-C 3 H7 COCH3 -61.7 ( h

) c5 h10o c2 h5 coc2h5 -61.7 ( h

) c5 h10o tetrahydropyran -52 ( h

) c5 h10 o t60-C4 H9 CHO -60.2 ( h

) c5 h10o n-C4 H9 CHO -58.8 ( h

) C5 H,oO i50-C3H7 COCH3 -63.0 ( h

) c5 h12 o n-C3 H7 CH(OH)CH3 -76.1 ( h

) c5 h12 o iso-C3 H7 CH(OH)CH3 -77.4 ( h

) c6 h5 o phenoxy radical 9

a 7186

c6 h6 o phenol -23.05 7100

c6h8 o dimethylfuran -23.5 ( h

) c6 h9o (CH3)2 C=CHCOCH2 2.35 ( h

) CeHioO cyclohexanone -54.09 7259

c6 h10o (CH3 )2 C=CHCOCH3 -41.8 ( h

) c6 h12 o fert-C4 H9 COCH3 -71.3 ( h

) c6h12 o 5ec-C4 H9 COCH3 -67.98 ( h

)

267
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///2 98 (g) Reference

(kcal mol -1

) c6h12 o n-C4 H9COCH3 -66.6 ( h

) c6h12 o iso-C4H9COCH3 -67.98 (h

) C6 Hi4 0 (zso-C 3 H7 )2 0 -69.9 ( h

) C6 H140 (n-C3 H7 )2 0 -67.2 (h

) c7 h6 o 'benzaldehyde -10.5 7059, 7106

c7 h6 o tropone 17 ( h

) c7 h8 o 'benzyl alcohol -25 c > d 7059

c7 h8 o anisole -16 ( h

) c7 h8 o m-cresol -31.63 7100

c7 h8 o p-cresol -29.97 7100

c7 h8 o o-cresol -30.74 7100

c7 h14 o n-C5 H„COCH3 -72 ( h

) c8 h8 o acetophenone -23 d 7186

c8 h8 o p-methylbenzaldehyde -21 ( h

) c8 h9 o methoxybenzyl radical 3 0

c8 h10 o phenyl ethyl ether -20.3 ( h

) C8 HioO ra-methylanisole -23 ( h

) C8 HioO 7-methoxycycloheptatriene 5 7229

C8 Hi 0O benzyl methyl ether -20 ( h

) C8 HioO p-methylanisole -23 ( h

) C9 H10 O phenyl ethyl ketone -24.7 ( h

) C9 H10 O benzyl methyl ketone -24.7 ( h

) C9 H10 O methylacetophenone -28.8 ( h

) c9 h12 o p-ethylanisole -28 ( h

) C9 H120 ethoxytoluene -28 ( h

) Ci2 H10 O phenyl ether 17 g 7186

C13 H10 O benzophenone 12.5 7189

C14 Hi2 0 p-methylbenzophenone 3.3 ( h

) cho2 COOH -39.2 7018

ch2 o2 HCOOH -90.48 7007

c2 h2 o2 CHOCHO -74 d 7001

c2 h4 o2 CH3 COOH -103.31 7007

C2 H|02 HCOOCH3 -83.7 7007

c3 h4 o2 CH3 COCHO -66 7056

c3 h«o2 hcooc2 h5 -89 0

c3 h«o2 ch3 cooch3 -99.2 7048

c3 h6 o2 c2 h5 cooh -108.7 0)

C3 H8 02 (CH3 0)2 CH2 -85.3 d 7018

c4 h6 o2 ch2=chch2 cooh -84.5 ( h

) C4 He02 ch3 cooch-ch2 -74.9 ( h

) C4 Hfi 02 CHaCOCOCHa -78.1 7074

c4 h8 o2 n-C3 H7 COOH -113.5 d 7018

C4 H8 02 CH3 COOC2 H5 -106.58 7048

C4 H8 02 i5o-C3 H7 COOH -118.5 d 7018

C4 H8 02 p-dioxane -85 d 7046

c4 h8 o2 C2 H5 COOCH3 -106.6 (

s ) c4 h8 o2 HCOOCH(CH3 >2 -97 7080

c4 h8 o2 1 ,2-epoxy-3-methoxypropane -43 g 7014

c4 h8 o2 HCOOCH2 CH2 CH3 -94 7057

C4 Hio02 (CH3 0)2 CHCH3 -93.1 7091

c5 h4 o2 2-furaldehyde -25 0

c5 h8 o2 CH3 COCH2 COCH3 -83 0

c5 h8 o2 c2 h5 cococh3 -83 C)

C5 H10O2 c2 h5 cooc2 h5 -113.5 c 7081

C5 H102 Cf^COOCHaCH.CH, -112.8 7048

c5 h10o2 n-C3 H7 COOCH3 -110.7 c 7081

268
Appendix 1. Heals of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298(g) Reference

(kcal mol -1

)

C5H10O2 iso- C3H7COOCH3 -112 0)

C5 H10 O2 HCOOCH2 CH(CH3 )2 -102 0

C5H10O2 HCOO(CH2 )3 CH3 - 98.39 0

C5H10O2 CH3 COOCH(CH3)2 - 115.85 7048

C5H1202 (CH3 0>2 C(CH3 >2 - 94.1 ( h

) C5H1202 ( C2 H5 0)2 CH2 - 89.4 ( h

) C6H402 p-benzoquinone - 24.6 c - d 7059

C6H602 p-dihydroxybenzene - 70.8 (h

) C6H1202 C2H5 COOCH(CH3 )2 -116 ( h

) C6H1202 CH3 COO(CH2 )3 CH3 - 118.9 7048

C6H1202 CH3 COOCH2 CH(CH3 )2 -121.1 7048

C6H1202 CH3 COOCH(CH3 )C 2 H5 -121 0

C7H602 p-hydroxybenzaldehyde - 57.8 (h

) C7H602 benzoic acid - 72.6 ( h

) C7H802 methoxyphenol - 61.2 ( h

) C8H802 a-hydroxyacetophenone - 56.4 ( h

) (J8.H.802 m-hydroxyacetophenone - 65.6 ( h

) C8H802 p-hydroxyacetophenone - 65.6 ( h

) C8H802 p-methoxybenzaldehyde - 48.1 (h

) C8H802 methyl benzoate - 71.7 7048

C9H10O2 methyl p-toluate -76 ( h

) C9H10O2 a-methoxyacetophenone -56 ( h

) C9H10O2 m-methoxyacetophenone -57 ( h

) C9H10O2 p-methoxyacetophenone -57 ( h

) C13H10O2 phenyl -benzoate -30 d 7186

C13H10O2 p-hydroxybenzophenone - 33.5 (h

) C14H10O2 benzil -21.8 7189

C14H1202 methoxybenzophenone - 23.9 ( h

) c4 h8 o3 CH3OCH2COOCH3 -132 ( h

) C4H10O3 (CH3 0)3 CH - 121.3 c 7059

C5H1203 (CH3 0)3 CCH3 -128 (0

C8H8 03 methyl p-hydroxybenzoate - 113.8 (h

) C9H10O3 methyl p-methoxybenzoate -104 ( h

) C13H10O3 diphenyl carbonate -86 d 7186

C5H1204 (CH3 0)4 C -158 0

C7H1406 methylglucoside -270 c ’ d 7059

hno3 HN03 - 32.28 7007

C2H7B02 (CH3 0)2 BH - 139.2 7217

C3H9B03 (CFhjOhB - 215.0 7007

CH3N0 HCONH2 -46 d 7007

C2H5NO CH3CONH2 -54 c- d 7059

C3H7NO CH3CONHCH3 -55 0

C3H7NO HCON(CH3 ) 2 -50 0)

C4H9NO CH3 CON(CH3 )2 -58 0

C5H5NO 4-hydroxypyridine -15 ( h

) C5 HnNO HCON(C2 H5 )2 -60 0

c6h5no 2-pyridinecarboxaldehyde 2 ( h

) c6 h5 no 4-pyridinecarboxaldehyde 2 ( h

) c6h7 no aminophenol -21.1 ( h

) c6 h13no CH3 CON(C2 H5)2 -68 0

C7H5NO phenyl isocyanate 20.2 ( h

) C7H5NO cyanophenol 5.6 ( h

) C7H7NO benzamide -22 0)

C7H7NO p-aminobenzaldehyde -8.1 ( h

) C7H9NO p-methoxyaniline - 11.5 ( h

) C8 H5 NO p-cyanobenzaldehyde 18.6 ( h

)

269
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298 (g) Reference

(kcal mol -1

) C8 H9NO aminoacetophenone -15.9 ( h

) c8h9 no acetanilide -23 0

c9h7 no p-cyanoacetophenone 10.8 ( h

) c9 h7 no a-cyanoacetophenone 14.9 ( h

) C13 HnN0 aminobenzophenone 16.2 ( h

) c14 h9 no cyanobenzophenone 42.9 ( h

) c2 h6 n2 o (CH3 ) 2 NNO 14.5 c ’ d 7059

CHaNOO ch3 no2 -17.86 7007

CH3N02 CH3 ONO -16.5 7007

c2 h5 no2 c2 h5 no2 -23.56 7007

c2 h5 no2 nh2 ch2 cooh -96.7 ( h

) c3 h7 no2 i5o-C3 H7N02 -30 ( h

) c3 h7 no2 n-C3 H7 ONO -30.9 ( h

) c3 h7 no2 n-C3 H7 N02 -28.5 ( h

) C4H5N02 CH2 CNCOOCH3 -65.4 ( h

) c4h9no2 u-C4 H9ONO -35.8 ( h

) c6 h5 no2 nitrobenzene 15 ( h

) C6 Hi 3 N02 isoleucine -120.3 ( h

) c7 h6 no2 ra-nitrobenzyl radical 30 ( h

) c7 h7 no2 ra-nitrotoluene 10 c - d 7059

c7 h7 no2 p-nitrotoluene 10 (*) c8 h9no2 methyl p-aminobenzoate -64 ( h

) c9 h7 no2 methyl p-cyanobenzoate -37.4 ( h

) c2 h(; n2 o. (CH3 )2 NN02 33.7 7134

c4 Hl()N2 02 (C2 H5 )2NN02 36.8 7134

c6 h6 n2 o2 o-nitroaniline 15 ( h

) C6 HhN2 02 m-nitroaniline 15 ( h

) Cfi H8 N2 02 p-nitroaniline 15 ( h

) c2 h5 no3 C2H5ONO2 -36.82 7007

c3 h7 no3 rc-C3 H7 0N02 -42 0

c6 h5 no3 p-nitrophenol -32.4 ( h

) c7 h5 no3 p-nitrobenzaldehyde -19.4 ( h

) c8 h-no3 m-nitroacetophenone -27.2 ( h

) c8 h7 no3 p-nitroacetophenone -27.2 ( h

) c13 h9no3 p-nitrobenzophenone 4.9 ( h

) c8 h7 no4 methyl p-nitrobenzoate -75.4 ( h

) F F 18.88 7007

F- F- -64.7 7007

HF HF -64.8 7007

XeF2 XeF, -25.9 7195

XeF4 XeF4 -51.5 7195

XeFfi XeFH -70.4 7195

LiF LiF -79.5 7004

Li2 F2 Li2 F2 -221.6 7004

BeF BeF -41.5 7140

BeF2 BeF2 -189.6 7140

BF BF -29.2 7007

bf2 BF, -130.6 7004

bf3 bf3 -271.75 7007

CF CF 68 (b

) cf2 cf2 -35 7009

cf3 cf3 -114 7007

c2 f3 c2 f3 -45.8 7034

cf4 cf4 -221 7007

270
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A//?298 (g)

(kcal mol -1

)

Reference

c2 f4 c2 f4 -155.5 7007

c2 f:> c2 f5 -212 7034

c2 f8 c2 f6 -310 7007

c3 f6 c3 f6 -258.75 7034

c3 f7 n-C3 F7 -306.5 7034

c3 f7 ISO -C3 F7 -319.9 7034

C3 Fh c3 f8 -411 7034

c4 f8 perfluoromethylcyclohexane -352.0 7053

U4 1 10 n-C4 Fio -505.5 7034

C7 F14 perfluoromethylclohexane -675.3 7228

NF NF 57 ( b

) nf2 nf2 10.3 7007

n2 f2 frarcs-N2 F2 19.6 7007

n2 f2 c«-N2 F2 16.6 7007

nf3 nf3 -29.8 7007

n2f4 n2 f4 -1.7 7007

OF OF 41 7007

o2 f 02 F 3.0 7004

of2 of2 -5.2 7007

02 F2 02 F2 4.3 7007

ch2 f ch2 f - 6.6 ( b

) ch3 f ch3 f -67 7012

c2 h2 f c2 h2 f - 12.2 ( b

) c2 h3f c2 h3 f -28 7012

c2 h4 f c2 h4 f -16 ( h

) c2 h5 f c2 h,f -60.05 ( b

) c3 h6 f ch2 fch2 ch2 -20.9 (h

) c5 h9f fluorocyclopentane -61 0

C5 H11 F W-C5 H 11 F -74.8 ( b

) c6 h5 f fluorobenzene -26.48 7097

c7 h7 f o-fluorotoluene -33 0

c7 h7 f m-fluorotoluene -34 0) c7 h7 f p-fluorotoluene -34.01 7148

chf2 chf2 -70.2 ( b

) ch2 f2 ch2 f2 - 106.8 7007

c2 h2 f2 ch.=cf2 -78.6 7007

c2 h4 f2 ch3 chf2 -114.3 7007

c6 h4f2 p-difluorobenzene - 70.69 7148

c6h4 f2 m-difluorobenzene -71.35 7148

c6 h4 f2 o-difluorobenzene -67.65 7148

chf3 chf3 -164.5 7007

c2 hf3 c2 hf3 -111.9 e 7012, 7037

c2 h3 f3 ch3 cf3 -176.0 7007

c3 h3f3 ch2=chcf3 -154 a 7042

c3 h5 f3 c2 h5 cf3 -191 a 7042

c7 h5 f3 benzotrifluoride - 138.87 7105

BOF BOF -145 7007

B303F3 b3 o3 f3 -568 7007

ch3 bf2 ch3 bf2 -194 a 7020

c2 h3 bf2 ch2=chbf2 -190 a 7020

c2 h3 bf2 c2 h5 bf2 -214 a 7020

c3 h7 bf2 i5 o-C3 H7 BF2 -219 a 7020

ChHioNF A^^-dimethyl-p-fluoroaniline -23 ( b

) c2 h3 of CH3 COF -104.9 7007

271
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///2 9g(g) Reference

(kcal mob1 ) C6 H5 OF o-fluorophenol -67.9 ( h

) C7 H5 OF benzoyl fluoride -54.6 ( h

) C3 H3 OF3 CH3 COCF3 -218 a 7044

Na Na 25.755 7004

Na2 Na2 32.87 7004

Mg Mg 35.28 7004

MgO MgO 1.0 7004

MgF MgF -53.1 7004

MgF2 MgF2 -173.2 7004

MgaF4 Mg2F4 -411.9 7004

A1 A1 78.0 7007

AlO AlO 21.8 7007

A12 0 A12 0 -31 7007

ai2 o2 ai2 o2 -94 7007

A1F A1F -61.7 7007

A1F2 A1F2 - 149.2 7207

A1F3 AIF3 -287.9 7007

Si Si 108.9 7007

Si2 Si2 142 7007

Si3 Si3 147 7007

SiH3 SiH3 33.4 ( b

) SiFR SiH4 8.2 7007

Si.Hn Si2 H6 19.2 7007

SiB SiB 175 d 7007

SiC SiC 177 7007

SiC2 SiC2 147 7007

Si2 C Si2 C 132 7007

Si2 C2 Si2 C2 168 d 7007

Si2 C3 Si2 C3 177 d 7007

Si3 C Si3 C 162 d 7007

SiO SiO -23.8 7007

SiF SiF 1.7 7007

SiF4 SiF4 -385.98 7007

C2 H«Si C2 H3 SiH3 -2 7007

C2 H«Si C2 H5 SiH3 -32 O

C3 Hi 0 Si (CH3 )3 SiH -42 a 7139

C3HioSi i5o-C3 H7 SiH3 -38 0) C4 Hi 2 Si (CH3 )4 Si -57.149 7007

C5 Hi 4 Si (CH3)3 SiC2 H5 -63 a 7139

CeHifiSi iso-C3 H7 Si(CH,3)3 -72 a 7139

CtiHieSi (C2 H5)3 SiH -47 d 7007

C7 Hi 8 Si ferf-C4 H9 Si(CH3 )3 -83 a 7139

C8 H2 oSi (n-C3 H7 )2 Si(CH3>2 -41 d 7135

C8 H20 Si (C2 H5)4 Si -61 d 7007

CioHieSi benzyltrimethylsilane -30 0) C6 Hi8 Si2 (CH3) 3 SiSi(CH3)3 -126 K 7139

BCSi BCSi 166 d 7007

C7 Hi 9 SiN (CH3 )3 SiN(C2 H5)2 -98 a 7139

C4 H12 SiO (CH3)3SiOCH3 -132 a 7139

C8 Hi 8 Si2 0 (CH3 )3 SiOSi(CH3 )3 -185.88 7007

P P 75.20 7007

P2 P2 34.5 7007

P4 P4 14.08 7007

PH PH 59.2 7004

ph2 PH2 30.1 7004

272
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298 (g) Reference

(kcal mol -1

) PH;i ph3 1.3 7007

P2 H3 p>h3 23 b 7123

p2 h4 p2 h4 5.0 7007

PC PC 111.7 7004

PO PO -1.46 7004

pf3 pf3 -219.6 7007

A1P A1P 103 c 7208

ch5 p ch3 ph2 -7 g 7224

c2 h7 p c2h5ph2 -12 g 7224

c2 h7 p (CH3)2 PH -15 7028

c3 h9 p (CH3 )3P -23.2 7069

c4 h„p (C 2 h5 ) 2 ph -25 g 7224

C6 H15 P (C2 Hs)3P -38 g 7224

c 18 h15 p triphenylphosphine 72.4 7118 s s 66.636 7007 s2 s2 30.68 7007 s4 s4 32.7 7007 s6 s6 24.5 7007 s8 s8 24.45 7007

HS HS 34.10 7007

h2 s H2 S -4.93 7007

h2 s2 h2 s2 2.53 7007

cs cs 56 7007

cs2 cs2 28.05 7007

so so 1.496 7007

so2 so2 -70.944 7007

sf4 sf4 -171.7 7197

sf6 sf6 -289 7007

ch3 s ch3 s 32.3 .(h

) ch4 s ch3 sh -5.34 7007

c2 h4 s ch2=chsh 20.7 ( h

) c2 h4 s ethylene sulfide 19.69 7007

c2 h5 s c2 h5 s 25.5 7019

c2 h6 s ch3sch3 -8.90 7007

c2 h6 s C0 H5 SH -10.95 7007

c3 h6 s propylene sulfide 19.7 g 7063

c3 h6 s trimethylene sulfide 14.78 7062

c3 h7 s n-C3 H7 S 39 a 7257

c3 h8 s c2 h5 sch3 -14.22 7067

c3 h8 s n-C3H7 SH -14.3 ( h

) c4 h4 s thiophene 24.5 c 7059

c4 h8 s tetrahydrothiophene - 8.1 7043

c4 h8s CH3SCH2 CH=CH2 10 g 7083

C4 Hi 0S iso-C3H7SCH3 -21.43 7087

C4 Hi0 S C2 H5 SC2 H5 -19.86 7007

C4 HioS secC

4 H9SH -20.56 (h

) C4 Hi0S i5o-C 4 H9SH -20.56 ( h

) C4 Hi 0S £ert-C 4 H9 SH -23.86 ( h

) C4 Hi0S n-C4 H9 SH -19.2 ( h

) C4Hi0S n-C3 H7 SCH3 -19.51 7087

c5 h6s 2 -methylthiophene 19.94 7225

c5 h10s 3-methyltetrahydrothiophene -8.72 ( h

) c5 h10 s pentamethylene sulfide -13.5 ( h

) c5 h10 s cyclopentanethiol -9.43 ( h

) c5 h12 s n-CsHnSH -24.14 ( h

)

323-656 0- 69—18 273
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298 (g) Reference

(kcal mol -1

) c5 h12 s (C2 H5) 2 CHSH -25.5 (h

) c5 h12 s /i-C 4H9SCH3 -23.43 (h

) c5h12 s n-C3 H7 SC2 H5 -23.43 ( h

) c5 h12 s £e/t-C 4H9SCH3 -28.08 (h

) c5 h12 s iso-CsHnSH -25.49 ( h

) c6 h5 s phenyl sulfide radical 51 7019

c6h6s benzenethiol 25.37 7101

C6H8 S 2-ethylthiophene 12 0

CeHioS cyclopentenyl methyl sulfide 11.85 0

c6 h12 s cyclohexanethiol -21.23 0

Cellos (n-C3H7 )2 S -28.3 ( h

) c7 h8 s phenyl methyl sulfide 23.5 7019

c7 h10s 2-propylthiophene 7.0 (!) CgHioS phenyl ethyl sulfide 18.4 7019

c8 h12 s 2-butylthiophene 2.1 0

C8 Hi8S (n-C 4 H9)2 S -38.2 ( h

) C2 HeS2 ch3ssch3 -5.64 7007

c4 h8 s2 thiadioxane 3.5 (h

) C4 HioS2 C2 H5 SSC2 H5 -17.42 7051

C2 HeS3 ch3sssch3 0 7026

COS COS -33.96 7007

snf7 sf5 nf2 -245 a 7196

S02 F2 so2 f2 -205 a 7121

CHNS HNCS 30.5 7007

C2 H3 NS CH3 NCS 31.3 7007

c2 h3 ns ch3 scn 38.3 7007

c3 h5 ns c2 h5 ncs 26 (h

) c3h5 ns c2 h5 scn 33 ( h

) c4 h7 ns n-C3 H7NCS 21 ( h

) c7 h5ns phenyl thiocyanate 70 ( h

) c7 h5 ns phenyl isothiocyanate 63 ( h

) c8h7 ns benzyl thiocyanate 65 ( h

) ch4 n2 s NH2 CSNH2 -2 d 7001

c2 h6n2 s nh2 csnhch3 -3 0

c3h6 n2 s nh2 csnhch=ch2 22 0

c3 h8 n2 s ch3 nhcsnhch3 -4 0

c3h8n2 s NH2 CSN(CH3) 2 -6 0

c4h10n2 s CH3NHCSN(CH3 )2 -7 0

c5 h12 n2 s (CH3 )2 NCSN(CH3 )2 -10 0

c5 h12 n2 s c2 h5 nhcsnhc2 h5 -14 0

c5 h„nso2 methionine -101 ( h

) so2 nf3 fso2 nf2 -170 a 7196

so3nf3 fso2 onf2 -163 a 7196

Cl Cl 29.082 7007

Cl- Cl- -58.8 7007

HC1 HC1 -22.062 7007

LiCl LiCl -46.778 7004

Li2 Cl2 Li2 Cl2 - 143.06 7004

BeCl2 BeCl2 -85.7 7140

BC1 BC1 35.73 7007

BC12 BC12 -19.5 ( b

) bcl BCls -96.50 7007

B2 Cl4 B.CL -117.2 7007

CC1 CC1 122 ( b

) CC12 CC12 66 ( b

) CCb CC13 14 7007

274
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description ^^/29s(g) Reference

(kcal mol -1

) CCL4 CC14 -24.6 7007

C2 Cl4 C2 Cl4 -2.9 7007

C2 CI5 C2 C15 9.1 ( b

) F3 C1 F3 C1 -39.0 7007

MgCl MgCl -10.4 7004

MgCl2 MgCl2 -95.85 7004

MgjCl, M&Ch -233 c 7006

SiCl3 SiCl3 -102.4 ( b

) SiCL, SiCl4 -157.03 7007

PCI PCI 28.4 ( b

) PC12 PC12 -21 ( b

) PC1;5 PCI3 - 68.6 7007

P>C14 P2 CI -106 a - b 7120

CH2 C1 C1P Cl 29 a 7016

CH3 C1 CH3 C1 -19.32 7007

C2 H3 C1 C2 H3 C1 8.5 7007

c2 h4 ci ch2 ch2 ci 19.07 ( h

) c2 h5 ci c2 h5 ci -26.81 7007

C3 H3 C1 CHiC^CCl 37 0

C3 H4 C1 CHC1=CHCH2 23 ( h

) C3 H4 C1 CHf=CClCH2 22 ( h

) c3 h7 ci n-C3 H7 Cl -31.05 7065

c3 h7 ci iso-C3 H7 Cl -36.15 7065

c4 h9 ci sec-C4 H9 Cl -38.7 7066

c4 h9 ci n-C4 H9Cl -35.4 7066

C4 H9 C1 iso-C4 H9 Cl -38.2 7066

c4 h9 ci £erf-C4 H9 Cl -43.1 7066

c5 h9 ci chlorocyclopentane -26 0 ) c5 h„ci n-C.-,HiiCl -40 ( b

) c6 h5 ci chlorobenzene 12.7 7064

c7 h6 ci p-chlorobenzyl radical 30 0

c7 h7 ci m-chlorotoluene 3.5 0)

c7 h7 ci p-chlorotoluene 3.5 0

c7 h7 ci o-chlorotoluene 4.6 7064

c7 h7 ci benzyl chloride 7.1 ( h

) c7 h9 ci ejco-5-chloro-2-norbornene 23 a 7227

c7 h9 ci enc?o-5-chloro-2-norbornene 23 a 7227

c7 h9 ci 3-chloronortricyclene 15 a 7227

chci2 CHC1, 31 ( b

) ch2 ci. CH2 C12 - 22.10 7007

c2 h2 ci2 ch2=cci2 .58 7007

c,h2 ci2 tran5 -C2 H2 Cl2 1.47 7007

c2 h2 ci2 ci5-C2 H>Cl9 .90 7007

C2 H4C12 CH->C1CH2 C1 -31.02 7007

c3 h4 ci2 ch2=ccich2 ci -8.04 ( b

) c3h6 ci2 1,3-C3 H6C12 -34.79 ( h

) c3 h6 ci2 1,2-C3 H6 C12 -36 ( h

) c6h4ci2 m-dichlorobenzene 6.7 7064

c6h4 ci2 p-dichlorobenzene 6.0 7064

c6h4 ci2 o-dichlorobenzene 7.8 7064

chc13 CHCI3 -24.65 7007

C2HC13 C2 HC13 - 1.86 7007

c2 h2 ci4 CHCl^HCl, -35.7 7007

CNC1 CNC1 32.97 7007

CFC1 CFC1 48 a 7008

CF3 C1 CF3CI -166 7007

275
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///29s(g) Reference

(kcal mol -1

) C2 F3C1 c2 f3 ci -132.7 7007

CF,C12 cf2 ci2 -114 7007

CFCIa CFCI3 -66 7007

C2 F3 C13 CFC12 CF2 C1 -181.5 7007

c103 f c103f -5.7 7007

SiHCl3 HSiCl3 -122.6 7007

P0C1 POC1 51.5 ( b

) P0C12 POCl2 -92.3 ( b

) P0C13 POC13 -133.48 7007

C5 H4 NC1 4-chloropyridine 26 0

C5 H4NC1 2 -chloropyridine 26 0

C8H10NC1 ^./V-dimethyl-p-chloroaniline 12 ( h

) c2 h2 oci CH2 C1C0 -12 0

c2 h3 oci CH3 COCI -58.20 7007

c2 h5 oci CH2 C1CH2 0H -59 d 7001

C3H50C1 ch3 coch2 ci -56.7 (h

) C3H50C1 epichlorohydrin -27 7014

C6H5 0C1 p-chlorophenol -33.9 ( h

) c6 h5 oci o-chlorophenol -32.9 ( h

) c7 h5 oci p-chlorobenzaldehyde -20.9 ( b

) C7 H50C1 benzoyl chloride -28.9 d 7104

C8 H7 0C1 a-chloroacetophenone -24.5 ( b

) C8 H7 0C1 p-chloroacetophenone -28.7 ( h

) c8 h7 oci p-methylbenzoyl chloride -28.7 ( b

) c13 h9 oci p-chlorobenzophenone 3.4 ( b

) c3 h5 o2 ci CH0 CICOOCH3 -104.8 ( b

) C4H7 02 C1 CH2C1C00C2 H5 -109.8 ( h

) c8h7 o2 ci p-methoxybenzoyl chloride -55.9 ( h

) c8 h7 o2 ci methyl p-chlorobenzoate -76.9 ( b

) c7 h4 oci2 p-chlorobenzoyl chloride -28.6 ( h

) c2 h2 fci cis- C2 H2 FC1 -—36 ( b

) c2 h2 fci £rarcs-C2 H2 FCl -37 ( h

) c6 h4 fci m-chlorofluorobenzene -32 ( b

) c6 h4 fci p-chlorofluorobenzene -32 ( b

) c6 h4 fci o-chlorofluorobenzene -31 ( b

) CHF,C1 CHF2 C1 -113 7004

C2 HF2 C1 ci5-C2 HF2 Cl -80 ( b

) c2 hf2 ci £rans-C2 HF2 Cl -80 ( h

) chfci2 CHFC12 -69 7004

C3H9SiCl (CH3 )3 SiCl -84.32 7007

CH3SiCl3 CH3 SiCl3 -126.4 7004

C2 H3 SiCl3 CH2=CHSiCl3 -101 C)

C2 H5 SiCf3 C2 H5 SiCl3 -131 (*) C3 H7 SiCl3 iso-C3 H7 SiCl3 -138 n

C3 H7 SiCl3 n-C3 H7 SiCl3 -136.3 0

C4 H3 C1 S 2 -chlorothiophene 17 0

C7 H4 N03C1 p-nitrobenzoyl chloride -27.1 ( b

) K K 21.31 7004

Ca Ca 46.04 7001

CaO CaO 13 f 7191

CaF CaF -63.9 7156

CaF, CaF2 -188.0 7157

CaCl CaCl 6.7 7001

Sc Sc 90.98 7158

ScF3 ScF3 -279 7230

276
Appendix 1. Heals of Formation Used in Tables 1 and 2 — Continued

Formula Description ^^/298(g)

(kcal mol -1

) Reference

Ti Ti 112.7 7140

V V 120 7001

C9 H5 O4V cyclopentadienylvanadium

tetracarbonyl -180 a d 7149, 7185

Cr Cr 94.8 7140

CrO CrO 53 f 7194

Cr02 Cr02 -13 f 7194

CrO.j Cr03 -68 f 7194

CrF CrF 7.3 f 7160

CrF, CrF, -99 7140

CrCeOn Cr(CO)6 -240.4 7103

CrO»Cl2 CrO,Cl2 -128.6 7001

Mn Mn 68.34 7001

MnF MnF -13.4 7231

MnF, MnF2 -113.4 7231

C8 H5 03 Mn cyclopentadienylmanganese

tricarbonyl -108 d 7185

Fe Fe 99.5 7004

FeF FeF 11.4 7004

FeF2 FeF2 -93.1 7004

FeCl2 FeCl2 -35.50 7004

FeoCL, Fe,CLi -105 7140

FeC5 05 Fe(CO),-, -175,4 7140

Co Co 101.5 7140

C7 H5 02 Co cyclopentadienylcobalt a> d 7149,

dicarbonyl -56 7185

Ni Ni 102.7 7140

Ni2 Ni2 150 7140

NiO NiO 76 f 7234

NiF2 NiF, -76.3 c 7140, 7233

NiCl NiCl 15 7001

NiCl2 NiCl, -27.1 • 7001

NiC4 04 Ni(CO)4 -144.10 7140

Cu Cu 81.0 7004

CuF CuF 12 7004

CuF2 CuF, -68.7 7004

Ge Ge 90.0 7007

GeHs GeH3 38.8 ( b

) GeH4 GeH4 21.7 7007

Ge2 H« Ge,H(i 38.8 7007

Ge3 FC Ge3 H8 54.2 7007

GeO GeO -11.04 7007

Ge2 02 Ge,0, -112 7007

Ge3 03 Ge3 03 -212 7007

C4 Hi 2 Ge (CH3 )4Ge -35 8 7088

GeSiH* GeSiHn 27.8 7198

As As 72.3 7007

As4 As4 34.4 7007

AsH3 AsH3 15.88 7007

AS2 H4 As2 H4 41 a 7179

AsCC AsCb -61.80 7007

C3 H9 As (CH3 b As 3.7 7260

Ci«Hi5 As triphenylarsine 99.5 d 7117

Se Se 54.27 7007

Br Br 26.741 7007

277
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298 (g) Reference

(kcal mol -1

)

Br- Br- -55.9 7007

Br2 Br2 7.387 7007

HBr HBr -8.70 7007

LiBr LiBr -34.439 7004

Li2 Br2 Li2 Br2 -117.892 7004

BBr3 BBr3 -49.15 7007

CBr CBr 133 ( b

) CBr, CBr2 95 ( b

) CBr3 CBr3 42 7007

CBr4 CBr4 ly 7007

BrF BrF -22.43 7007

BrF3 BrF3 -61.09 7007

BrF5 BrFs -102.5 7007

MgBr MgBr -13 7004

MgBr2 MgBr2 -74.6 7004

Mg9Br4 Mg>Br4 -187 c 7006

BrCl BrCl 3.50 7007

FeBr2 FeBr2 -11 7140

Fe2 Br4 Fe9Br4 -63 7140

CH.Br CH2 Br 46.3 ( b

) CH^Br CH3 Br -8.4 7007

C2 UsBr C2 H3 Br 17 ( h

) C2 IUBt CH>CH2 Br 31 ( b

) C2 H5 Br C-.HsBr -15.42 7007

C3 H3 Br CHaC^CBr 49 0

C3 H3 Br CH=CCH2 Br 51 ( b

) C3 H5 Br CH3 CH=CHBr 9.7 ( b

) C3 H7 Br Tso-C3 H7 Br -23.99 c 7219

C3 H7 Br n-C3 H7 Br -18.65 c 7219

C4 H4 Br n-C4 H9 Br -25.67 7255

C4 H9 Br i5o-C4 H9 Br -24.26 ( h

) C4 H9 Br sec-C4 H9 Br -24.26 ( b

) C4 H9 Br £err-C4 H9 Br -27.56 ( h

) CsHnBr n-CoHuBr -27.84 ( h

) C6 H5 Br bromobenzene 24 ( h

) C7 H7 Br m-bromotoluene 14.9 ( b

) C7 H7 Br o-bromotoluene 15.9 ( b

) C-H7 Br benzyl bromide 19.1 ( b

) C7 H7 Br p-bromotoluene 14.9 ( h

) CHBr2 CHBr2 50.1 ( b

) CH2 Br2 CH2 Br2 -1 7001

C2 H2 Br- rrans-C2 H2 Br2 22 ( b

) C2 H>Br2 ci5-C2 H2 Br2 23 ( b

) C2 H4 Br2 CH3 CHBr2 -7 ( h

) C3 HnBr2 1 ,3-C3 H«Br2 -10.8 ( h

) CHBr3 CHBr3 4 7007

C2 HBr3 C>HBr3 26.19 ( b

) CNBr CNBr 44.5 7007

CF3 Br CF3 Br -153.6 7007

CClaBr CCLBr -11.0 7007

C.HiNBr 4-bromopyridine 38 0

C5 H4 NBr 2-bromopyridine 38 0)

C«H10 NBr AC/V-dimethyl-p-bromoaniline 24 ( b

) CI0 H14 NBr AVV-diethyl-p-bromoaniline 14.1 ( b

) C>H3 OBr CH3 COBr -46.6 7040

278
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///29fi(g)

(kcal mob1

)

Reference

C3 H5 OBr epibromohydrin -15 0

C6 H.5 OBr p-bromophenol -21.9 ( h

) C7 H5 OBr p-bromobenzaldehyde -8.9 ( h

) C7 HsOBr benzoyl bromide -14.7 d 7104

C8 H7 OBr p-bromoacetophenone -16.7 ( h

) Ci3H9 OBr p-bromobenzophenone 15.4 ( h

) C3H5O2B1" CH2 BrCOOCH3 -92.8 ( h

) C«H7 02Br methyl p-bromobenzoate -64.9 ( h

) C6 H4 FBr p-bromofluorobenzene -20 ( h

) C2H2F.Br, CF2 BrCH2Br -90 ( h

) C3 H9 SiBr (CFChSiBr -65 a 7139

C4 H3 BrS 2-bromothiophene 29 0

CH,ClBr CH2 ClBr -12 7012

C2 H4 ClBr CH,BrCH,Cl -18 ( h

) CHCl2 Br CHCbBr -14 7012

Sr Sr 39.2 7001

SrO SrO -3.4 f 7191

Sr2 0 Sr2 0 -56 f 7191

SrF SrF -5 7001

SrF2 SrF2 - 186.6 c 7001, 7261

SrCl SrCl 9 7001

Y Y 101.52 7158

yc2 yc2 143 c 7218

YO YO -7.5 f 7237

yf3 yf3 -295.7 7230

YCI3 YCb -178 e 7193

Zr Zr 145.42 7004

Nb Nb 184.5 7001

Mo Mo 157.3 7004

MoO MoO 101 7140

M0O2 M0O2 3 7140

M0O3 M0O3 -78 7140

M02OH M02 Oa -271 7140

Mo3 09 Mo3 09 -451 7140

MoCeOe Mo(CO)fi -218.0 7140

SrMo03 SrMo03 -139 f 7192

SrMo04 SrMo04 -257 f 7192

Ru Ru 153.6 7140

Ru04 Ru04 -44.0 7140

Rh Rh 133.1 7140

RhO RhO 89 7202

Rh02 Rh02 40 7202

Pd Pd 90.4 7140

Ag Ag 68.01 7140

Cd Cd 26.77 7007

CdCl2 CdCl2 -51.8 7001

In In 58.15 7007

In2 In, 91.04 7007

InO InO 92.5 7007

ln2 0 ln2 0 -3 c 7170

Sn Sn 72.2 7007

SnH4 SnH4 38.9 7007

Sn2 HH Sn2 H«i 65 a 7179

SnO SnO 3.6 7140

Sn2 02 Sn,0, -60 7140

279
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298(g)

(kcal mol -1

) Reference

Sn:i 0:i Sn3 03 -126 7140

SrLjOa Sn4 04 -193 7140

SnS SnS 28.5 7007

Sn2 S2 Sn2 S2 8.3 c 7238

SnSe SnSe 30.8 7007

Sn2 Se2 Sn2 Se2 15 f 7206

C3 H9 Sn (CH3 )3 Sn 14.7 ( b

) C4 H12 Sn (CH.3 )4 Sn -4.5 7007

C5 H14 S11 (CH3 )3 SnC2 H5 -7 7007

C«Hi6 Sn n-C3 H7 Sn(CH3 )3 -12 n

CgHieSn (C2 H5 )3 SnH -16.3 7256

C6 Hi 8 Sn2 (CH3 )3 SnSn(CH3 )3 - 11.6 d 7007

Sb Sb 62.7 7007

Sb2 Sb2 56.3 7007

Sb4 Sb4 49.0 7007

SbH3 SbH3 34.681 7007

Sb.H4 Sb2 H4 59 a 7179

InSb InSb 82.3 7007

InSb2 InSb2 75 7007

Ci 8 Hi 5 Sb triphenylstilbene 87.0 d 7117

Te Te 47.02 7007

Te2 Te2 40.2 7007

GeTe GeTe 42 7007

GeTe2 GeTe2 44 7007

SnTe SnTe 38.4 7007

I I(

2 P.3/2) 25.535 7007

I I( 2 P,/2) 47.27 7007, 7241

I- I- -47.0 7007

I2 I2 14.923 7007

HI HI 6.33 7007

Lil Lil -19.10 7004

U2 I2 Li2 L -81.78 7004

bi3 BI3 17.00 7007

IF IF - 22.86 7007

IF5 IF5 -196.58 7007

Mgl Mgl -2.5 ( b

) Mgl2 Mgl2 -41 c 7001, 7006

Mg2 l4 Mg2 l4 -113.4 c 7006

IC1 IC1 4.25 7007

IBr IBr 9.76 7007

CH3 I CH3 I 3.1 7007

C2 H5 I C2 H5 I -1.84 7007

c3 h3 i CH=CCH2 I 64 ( h

) c3 h7 i n-C3 H7 I -5.77 7065

c3 h7 i Tso-C3 H7 I -10.45 7065

c4 h7 i CH2=C(CH3 )CH|I 14 1 7076

c4 h7 i ch3 ch=chch2 i 15 1 7076

c4 hj 5 ec-C4 H9 I -11.26 ( b

) c4 h9 i n-C4 H9 I -9.91 ( b

) c4 h9i i'so-C4 H9 I -11.26 ( b

) c4 h9 i ^ert-C4 H9 I -14.56 ( h

) c5 h„i n-CsHnl -14.84 ( h

) c6 h5 i iodobenzene 37 ( h

) c7 h7 i o-iodotoluene 28.9 ( h

) c7 h7 i p-iodotoluene 27.9 ( h

) c7 h7 i m-iodotoluene 27.9 ( h

) ch2 i2 CH2 I2 27.0 7007

280
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///298 ( g

)

(kcal mol -1

) Reference

CHI, CHI, 50 7012

CNI CNI 53.9 7007

CF,I CF,I -141 7012

c8 h10 ni AGY-dimethyl-p-iodoaniline 37 ( h) c6 h4 cii o-chloroiodobenzene 29 ( h

) Cs Cs 18.83 7001

CsCl CsCl -62.4 7001

Csl Csl -42 c 7001, 7161

Cs2 I2 Cs2 I2 -121 c 7001, 7161

Ba Ba 41.96 7001

BaO BaO — 44.4 7001

BaF BaF -9 7001

BaCl BaCl 24 7001

Bal2 Bal2 -84 c ’ d 7001,7161

BaOH BaOH -68.5 c 7180

La La 102.96 7158

LaF, LaF, -326 7230

Ce Ce 111.60 7158

CeF, CeF, -330 7230

Pr Pr 89.09 7158

Nd Nd 78.33 7158

Sm Sm 48.59 7158

Eu Eu 41.92 7158

Gd Gd 95.75 7158

Tb Tb 93.96 7158

Dy Dy 70.91 7158

Ho Ho 70.6 7169

Er Er 81.79 7158

Tm Tm 59.1 7176

Yb Yb 36.33 7158

Lu Lu 102.16 7158

Ta Ta 186.8 7159

TaO TaO 62 7262

TaO, Ta02 -44 7262

W W 203.0 7140

WO WO 108 7140

W02 W02 11 7140

WO, WO, -71 7140

W2 06 w2 o6 -277 7140

W,09 W,09 -468 7140

wc6 o« W(CO)6 -208.3 7140

CaWO, CaWO, -117 f 7192

CaW04 CaW04 -223 f 7192

SrW0, SrWO, -144 f 7192

SrW04 SrW04 -251 f 7192

SnW04 SnW04 -192 f 7192

Sn2 W05 Sn2 W05 -252 f 7192

Re Re 189 7001

Re,Cl9 Re,Cl9 -140 7212

Re,Br9 Re,Br9 -70 7212

Os Os 189 7140

OsO, OsO, -67.8 7140

0s04 0s04 -80.6 7140

Ir Ir 159.0 7140

IrO IrO 104 ( b

) IrO, Ir02 48.5 c 7199

IrO, IrO, 1.9 7140

281
Appendix 1. Heats of Formation Used in Tables 1 and 2 — Continued

Formula Description A///2 98 (g) Reference

(kcal mol -1

) Hg Hg 14.652 7004

C2 H«Hg (CH3 )2 Hg 26.1 7001

C4 Hi 0 Hg (C2 H5 )2 Hg 25.1 7001

C6 H14 Hg (iso-C3 H7 )2 Hg 12.54 (*) C8 H18 Hg (rc-C4 H9 )2 Hg 5.38 0)

CH3 HgCl CH3 HgCl -12.08 7213

T1 T1 43.55 7007

T1C1 T1C1 -16.2 7007

TIBr TIBr -9.0 7007

Til Til 1.7 7007

Pb Pb 46.6 7007

PbH4 PbH4 64 a 7181

PbO PbO 17.1 c 7171

Pb2 02 Pb2 02 -29.2 c 7171

Pb3 03 Pb3 03 -75.1 c 7171

Pb4 04 Pb4 04 -134 c 7171

PbS PbS 31.7 7007, 7238

Pb2 S2 Pb2 S2 18.6 c 7238

PbCl2 PbCl2 -50.6 7001, 7007

C4 H12 Pb (CH3 )4 Pb 32.48 7007

Bi Bi 49.5 7007

Bi2 Bi2 52.5 7007

BiH3 BiH3 65 a 7181

BiS BiS 43 7007

Ci8 Hi 5 Bi triphenylbismuth 119.6 7117

U U 125 7001

uo UO 6

f 7200

uo2 uo2 -96 f 7200

uo3 uo3 -189 f 7200

a Calculated from appearance potential data.

b Calculated from average or estimated bond energies.

c Calculated from measured heats of combustion, reaction, etc.

d Calculated using estimated heats of vaporization, sublimation, etc.

e Average value.

f Calculated from atomization energies.

g Calculated using group equivalents.

h Calculated using group equivalents from appendix 2.

1 Calculated using measured heats of formation and group equivalents from appendix 2.

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284
9. Appendix 2. Table of Group Equivalent Values

Certain of the heats of formation in appendix 1 were estimated by the method

of Franklin. 3 The group equivalent values used are listed here.

Group equivalent values for AH{ of ideal gas at 298 K, kcal mol -1

Group AHf

-CHj -10. 12 Xh2 -4. 93 /

\

-CH -1.09 /

1 —c1

0. 80 -HC=ch2 15. 00 HC=

/

C H (trans) 17.83 \ / HC=CH (cis) 18.88 \

C=CHt 16.89 /

/

HC=C 20. 19 / \

\ /

C=c 24.57 / \

=ch2 6.25 =c= 33. 42 -c=CH 54 —c=C— 54 y\ 22 X/

y\ 24 x/

1 A 23 X/

Group AHf

y\ 23

I y\

v

35

-6

-4

—

—Cl —Br —I —OH (primary)

—OH (sec.) —OH (tert.) —OH (phenol) —O OH —O —

—O —0 —

—HC=0

\

/

c=o

OH

I —c=o

I 0

1 HC=0

—45 —10

2

15 -41.9 -44.9

-49.2 -46.9 -21

-27.2

-24

-33.9

-31.6

-94.6

-74

I 0

1 —c=o —SH —s

—s—s— —NHi

\h

/

\

N—

/—ONO

-no2 -ONOi —CN —NC

O

II -C-NHi

-NCS —SCN

-ch2 X

CH

/

\

—C- /—o- -0 —0 - —s- —c=o

O'

I -c=o —NH

\

'/NGroup AHf

-79.8

5.7

11.6

10

2.8

12.0

19.2

-10.9 -8.5

-18.4

29.5

44.4

-44

41

48

34

34

34

8

8

43

0

-35

47

54

Correction factors for— C5 cycloparaffin ring 5.68 Gi cycloparaffin ring 18.4 C3 cycloparaffin ring 24.22

I \

Adjacent — C— and — CH groups 2.5

3 adjacent —CH groups 2.3 /

I 2 adjacent — C— groups 5.4

Resonance of radical with one C=C bond or aromatic ring —19

Resonance of radical with 2 C=C bonds or aromatic rings —30

Resonance of radical with 3 C=C bonds or aromatic rings —39

J. L. Franklin, Ind Eng. Chem. 41, 1070 (1949); J. Chem. Phys. 21, 2029 (1953).
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