bluuebunny/crossref_metadata_2025 huggingface dataset:
The reaction of formaldehyde arylhydrazones with acetic anhydride
Authors: Lamberton JA , Nelson ER , Triffett ACK
Published: September 2010

Formaldehyde
2,4-dinitrophenylhydrazone does not react with acetic anhydride, whereas
formaldehyde 4-nitrophenylhydrazone affords a complex mixture of products from
which formaldehyde N,-acetyl-4-nitrophenylhydrazone,
Nβ-acetyl-4-nitrophenylhydrazine, Nα,Nβ-diacetyl-4-nitrophenylhydrazine
and 1,4-di(4'-nitrophenyl)-2,5-endo-methanohexahydro-s-tetrazine
have been isolated.Formaldehyde phenylhydrazone reacts with acetic anhydride under mild
conditions to give Nα,Nβ
diacetylphenylhydrazine,1,4-diphenylhexahydro-2,5-endo-methano-s-tetrazine,
2,5-diacetyl-1,4-diphenylhexahydro-s-tetrazine and two other products C17H20N4O2
and C32H36N8O2 which areconsidered to be (7) and
(15) respectively.
The oxidation of benzoylthiourea
Authors: Harris RLN , Oswald LT
Published: September 2010

Oxidation of benzoylthiourea with bromine gives initially N1,N3-dibenzoyl-α,α-dithiobisformamidine
dihydrobromide (5) which, on recrystallization or treatment with polar
solvents, rearranges and cyclizes with elimination of ammonium bromide or
sulphur to give derivatives of 3H-1,2,4-dithiazole and 1,2,4-thiadiazole
respectively. The former reaction is unprecedented in thiourea oxidations and
occurs exclusively under suitably chosen conditions.
On the magnetic anisotropy of caesium hexachlorouranate(IV)
Authors: Figgis BN , Mackey DJ
Published: September 2010

The magnetic susceptibility
and anisotropy of the hexagonal salt Cs2UCl6 were
measured from 80 to 300 K and found to be essentially independent of
temperature. The results were interpreted using a parameterized crystal field
model. k was found to be 0.93, but
the L C3-U-Cl deduced does not agree with the value known from the
structure for any reasonable range of the crystal field parameter p2.
It is deduced that the next state, T4(Oh), above the ground T1 state should be
split by 50 cm-l. This is in fair agreement with the value observed
from the spectrum, 82 cm-1.
Manganese(IV) dithiocarbamato complexes
Authors: Brown KL , Golding RM , Healy PC , Jessop KJ , Tennant WC
Published: September 2010

Several new cationic
dithiocarbamato complexes of the type [Mn(dtc)3] X (where dtc refers
to the dithiocarbamate ligand and X to the non-coordinating anions, perchlorate
and tetrafluoroborate) have been prepared by the reaction of manganous
perchlorate and manganous tetrafluoroborate with the appropriate N,N-disubstituted dithiocarbamates.
Conductivity, infrared, esr, magnetic susceptibility and a complete structure
determination on one of the compounds support a manganese(1V) formulation for
the complexes.
Studies on the Hurtley reaction
Authors: Cirigottis KA , Ritchie E , Taylor WC
Published: September 2010

As a result of a large
number of experiments on the Hurtley reaction the
following tentative conclusions are drawn: (a) the best and most
convenient solvent is ethanol; (b) the reaction succeeds
best with aromatic o-bromocarboxylic acids although o-iodo acids can be expected to give low
yields; (c) replacement of the
carboxyl group by any other functional group prevents the reaction; (d) a copper species,
probably copper(l), is an essential catalyst.

The reactivity of
8-bromo-1-naphthoic acid, which is almost identical with that of o-bromobenzoic
acid, is evidence against the intermediacy of a planar resonance hybrid
structure. The geometry of the bromo acid-copper intermediate appears to be of
paramount importance.
Alkaline hydrolysis of glycol esters - A newly suggested criterion in the assessment of anchimeric assistance
Authors: Balakrishnan M , Venkoba Rao G , Venkatasubramanian N
Published: September 2010

Solvent effects vis a vis
structural effects on the alkaline hydrolysis of various di-and
mono-benzoates of glycols have been studied in binary solvent mixtures of
dimethyl sulphoxide-water, ethanol-water and
acetone-water. It is observed that the higher the stabilization of the
transition state by the neighbouring group, the greater is the susceptibility
of the reaction to dipolar aprotic solvent acceleration[i.e. k(Me2SO)/k(EtOH) value]. The possibility of employing such solvent
effects to evaluate the extent of anchimeric
assistance in ester hydrolysis where the neighbouring group can stabilize the
transition state is examined. The studies have been extended to triethylene glycol derivatives and it is suggested that
dipolar aprotic-protic solvent effects could be used as a kinetic probe for the
conformation of the molecule.
Methyleneketenes and methylenecarbenes. I. Formation of arylmethyleneketenes and alkylideneketenes by pyrolysis of substituted 2,2-Dimethyl-1,3-dioxan-4,6-diones
Authors: Brown RFC , Eastwood FW , Harrington KJ
Published: September 2010

Flash vacuum pyrolysis
(430�) of 5-benzylidene-2,2-dimethyl-1,3-dioxan- 4,6-diones gives benzylidene-ketenes
which dimerize to form 2,4- bis(benzylidene)cyclobutane 1,3-diones.
Diphenylmethylene-,t- butylmethylene- and isopropylidene-2,2-dimethyl-1,3-dioxan-4,6-diones
similarly give the substituted methylene ketenes which dimerize to form
2,4-bis(diphenylmethylene)-, 2,4-bis(t-butylmethylene)- and 2,4- bis(isopropylidene)-cyclobutane-1,3-dione
respectively. Infrared measurements on the pyrolysis products kept at liquid
nitrogen temperature showed absorption near 2100 cm-1 which was
attributed to the methyleneketenes. Reaction of the pyrolysates of ethylidene-
and isobutylidene-2,2-dimethyl-1,3-dioxan-4,6-diones with aniline vapour
yielded but-3-enanilide and 4-methylpent-3-enanilide respectively.
Complexes of cobalt(II) and nickel(II) with some bidentate thiosemicarbazones
Authors: Malik MA , Phillips DJ
Published: September 2010

Some new, and some
previously reported, bis-chelate complexes of bidentate thiosemicarbazones with
a range of cobalt(II) and nickel(II) salts have been isolated, and they have
been characterized by infrared and electronic spectra, and by magnetic
measurements. The complexes are those of the thiosemicarbazones of acetone,
diethyl ketone and cyclopentanone with nickel(II), and the thiosemicarbazones
of acetone, ethyl methyl ketone, cyclopentanone and benzaldehyde with cobalt(II).
They all have the composition M(tsc)2X2
(some being obtained with solvent of crystallization), and the influence of
metal ion M, the thiosemicarbazone ligand tsc, and
the anion X on the structures is examined. The non-aromatic thiosemicarbazones
gave five-coordinate halo complexes of general type [M(tsc)2X]
X (M = Co, Ni; X = halide). The nitrates appear to have formally six-coordinate
structures of type [M(tsc)2(NO3)]NO3
involving one bidentate nitrate, although the electronic spectra suggest that
the coordination environments of the metal ions resemble those of five- rather
than six-coordinate complexes. The thiocyanato and perchlorato complexes are
considered to be five-coordinate with cobalt and six-coordinate with nickel.
Benzaldehyde thiosemicarbazone (bztsc) did not yield
nickel(II) complexes, but gave tetrahedral complexes [Co(bztsc)2]
X2 with X = halide, and a six-coordinate thiocyanato complex [Co(bztsc)2(NCS)2] whose reflectance
spectrum may show the effects of tetragonal distortion.
Constituents of Pleiospermium alatum: Alatamide and N-benzoyltyramine methyl ether
Authors: Chatterjee A , Chakrabarty M , Kundu AB
Published: September 2010

Two alkamides have been
isolated from the leaves of Pleiospermium alatum (Rutaceae). On the basis of spectral and chemical evidence
the new alkamide, designated alatamide, has been identified as N-(E)-(p- methoxystyryl)benzamide (1). The second compound has been
characterized as N-benzoyltyramine methyl ether (2) by hydrolysis experiments
and synthesis.
Chromium(III) complexes in dipolar aprotic solvents. VII. Competitive anation studies with [Cr(Me2SO)6]3+ in dimethyl sulphoxide
Authors: Lo STD , Watts DW
Published: September 2010

P.The competitive anation reactions:
[Cr(Me2SO)6]3+ + X- + Cl- [CrCl(Me2SO)5]2+ + Me2SO
CrX(Me2SO)5]2+ + Me2SO
[CrX(Me2S0)5]2*+ Me2S0
where X- is N3- or SCN- have been studied in Me2SO at one temperature as a function of the
concentrations of X- and Cl-. The results are compatible with a dissociative interchange reaction
of ion aggregates, and require that ion triplets as well as ion pairs contribute to product formation.
The results are consistent with our previous results on the anation of Cr(Me2SO)63+ separately
by SCN-, N3- and Cl-.
Hydrophobic interaction in deuterium oxide
Authors: Oakenfull DG , Fenwick DE
Published: September 2010

Methods previously used to
study hydrophobic interaction in ordinary water have been used to measure the
free energy of hydrophobic interaction between hydrocarbon chains in deuterium
oxide at 25�: ��� (1) Conductance measurements on micellar
solutions of a series of hexadecyltrimethylammonium
carboxylates give the effect of hydrocarbon chain length on the free energy of
binding a counter-ion (carboxylate ion) to the micelle, and hence the free
energy of hydrophobic interaction. ��� (2) Comparison of the kinetics of the
reaction between decylamine and 4-nitrophenyl decanoate with the kinetics of
the corresponding reaction without hydrophobic side chains (the reaction
between ethylamine and 4-nitrophenyl acetate) gives the extent to which
hydrophobic interaction stabilizes the transition state. This then provides
another estimate of the free energy of hydrophobic interaction. ��� The free energy of hydrophobic interaction
in D2O was found to be - 1.76 kJ mol-1, for each contact
between two methylene groups, compared with -1.40 kJ mol-1 in H2O.
Hydrophobic interaction is therefore stronger in D2O than in H2O.
Crystal and molecular structure of a cobalt(III) ammine complex of 2-Amino-4-imino-2-methylpentanoic acid
Authors: Robertson GB , Whimp PO
Published: September 2010

The crystal and molecular
structure of a cobalt(III) ammine complex of 2-amino-4-imino-2-methyl-pentanoic
acid, [Co(NH3)3{HN=C(CH3)CH2C(CH3)(NH2)(CO2)}]S2O6,
has been determined from three-dimensional X-ray data collected by counter
methods. The complex crystallizes in the monoclinic space group P21/c
(C52h, No. 14), with a = 7.576(4), b = 18.209(7), c =
14.068(6) Ǻ, β = 125.25(2)�, Z = 4. The structure was solved by
conventional Patterson and Fourier methods, and was refined by block-diagonal
least-squares methods to weighted and unweighted 12-factors of 0.041 and 0.040
respectively, for the 1479 unique reflections having I/σ(I) ≥ 3.0.
All hydrogen atoms have been located and refined. The complex cation is
essentially octahedral about the central cobalt atom with three amine groups
occupying mutually cis coordination sites; the three remaining sites at the
cobalt atom are occupied by the tridentate 2-amino-4-imino-2-methylpentanoic
acid ligand. The Co-O distance is 1.914(4) Ǻ, while the Co-N(imine)
distance is 1.924(5) Ǻ. The Co-N(NH3) distances range from
1.968(5) to 1.979(5) Ǻ, and are equal within experimental error. Within
the tridentate 2- amino-4-imino-2-methylpentanoic acid ligand, the C=N distance
is 1.252(7) Ǻ, while at the carboxyl group the ?free? C-O distance
[1.233(6) Ǻ] is significantly shorter than the distance from the carbon to
the coordinated oxygen atom [1.270(7) Ǻ]. In the S2O6
counter anion, the S-S distance is 2.112(2) Ǻ, and the S-O distances range
from 1.434(6) to 1.457(4) Ǻ, averaging 1.439 Ǻ.
N.M.R. studies of ligand exchange on acetylacetonatotrimethylplatinum(IV)
Authors: Ham NS , Hall JR , Swile GA
Published: September 2010

A quantitative analysis of
the variable-temperature 1H N.M.R. spectra of acetylacetonatotrimethyl-platinum(IV)
has been made. In CDCl3 solution the exchange of acetylacetonate
ligands is a first-order reaction and proceeds predominantly by dissociation of
the dimer into two separated five-coordinate activated complexes. The
activation energy is 61.5 � 0.8 kJ mol-1.
An electron spin resonance study of the hydrolytic products formed by titanium(III) trichloride in aqueous and mixed aqueous solutions and frozensolutions
Authors: Cookson DJ , Smith TD , Pilbrow JR
Published: September 2010

X-band e.s.r. measurements
of aqueous solutions containing titanium(III) trichloride at room temperature
and 77 K provide evidence for the formation of aquated Ti(OH)2+ as
the major product of hydrolysis at low pH, along with dimeric species Ti2(OH)24+
formed in small amounts. When certain organic solvents miscible with water are
present a further hydrolytic product suggested to be Ti2(OH)5+
is found at low pH. Consideration of an interaction spin Hamiltonian which
takes into account the symmetry properties of the paramagnetic ion pair systems
makes possible the computer simulation of the experimental spectra due to the
dimeric species. By this procedure the magnetic parameters associated with the
titanium(III) dimers have been evaluated along with a determination of the
titanium(III)-titanium(III) ion separations. This information has been used to
suggest possible structures for the dimeric species.
The effect of solute-solvent interactions on infrared carbon-halogen stretching frequencies
Authors: Lark PD , Orr BJ , Rhoades GF
Published: September 2010

Solvent shifts of the
infrared carbon-halogen stretching frequencies v(C-Hal) for a number of solutes
in solution have been measured. Using chloroethane as a reference solute, a
multiple regression analysis is found to correlate the relative frequency shift
(Δv/v) with three independent solvent
parameters: two functions of the dielectric constant and refractive index of
the solvent which reflect its dipolar and non-dipolar bulk dielectric
contributions, respectively, and a relative Lewis basicity parameter which
allows for specific solute- solvent interactions. Solvent variation constants,
which scale solvent shifts for one solute to the corresponding shifts of a
reference solute according to the method of Bellamy, Hallam
and Williams, have been determined and are found to be directly derivable from
the regression coefficients for the solvent parameters. The possibility of
further predicting solvent variation constants, in terms of linear free energy
relationships for the various solutes, is discussed. Solutes examined in the
course of the analysis are: chloroethane, chloromethane, chlorocyclohexane,
1-chloro-2-methylpropene, chlorobenzene, chlorobenzene[D5],
1,4-dichlorobenzene, bromomethane and iodoethane.
Studies on the application of the quinhydrone electrode in formamide. VI. The ionization constant of benzoic acid and standard potential of themercury-mercurous benzoate electrode from E.M.F. measurements at 25°
Authors: Dash UN
Published: September 2010

The cells

���������������� Ag-AgCl|KCl(m3),
KOBz(m2), HOBz(m1),
QH2-Q|Pt

and

����������������������� Hg-Hg2(OBz)2|HOBz(m), QH2-Q|Pt

have been used to
redetermine the ionization constant of benzoic acid in formamide and the standard
potential of the Hg-Hg2(OBz)2
electrode in formamide at 25�. The ionization constant of benzoic acid is found
to be 4.79 x 10-7 and is in good agreement with the value 4.37x10-7
obtained earlier. The value 0.2535�0.0005 V for the standard potential of the
Hg-Hg2(OBz)2 electrode is in
good agreement with the values 0.2541�0.0003 and 0.2545�0.0005 V obtained
previously from two independent cells.
Behaviour of the silver-silver bromide and the silver-silver iodide electrodes in formamide at different temperatures
Authors: Dash UN , Nayak B
Published: September 2010

From the e.m.f.
measurements of the buffered cells of the type

��������������������� Pt, H2|HOAc(m1),
KOAc(m2), KX(m3)|AgX-Ag

the standard potentials of
the Ag-AgX electrodes have been determined, in
formamide, at nine different temperatures in the range 5-45�. The standard
potentials of the Ag-AgX electrodes obtained at 25�
are in good agreement with those obtained from the study of the cells

������������������ Ag-AgX|KX(m3),
KOAc(m2), HOAc(m1),
QH2-Q|Pt

at 25�, where X is Br or I.
The cell

�������������������������Pt,H2|HBr(m)|AgBr-Ag

has been further studied in
this solvent at 25� with a view to having an independent check on these
buffered cells for the standard potential of the Ag-AgBr
electrode. The standard thermodynamic quantities (ΔG�, ΔH�, and
ΔS�) for the corresponding cell reactions have been calculated from the
e.m.f. data over the range, 5-45�.
The lanthanide-shifted N.M.R. spectra of some cyclopentadienone-cobalt complexes
Authors: Dickson RS , Johnson SH , Rae ID
Published: September 2010

The effect of the lanthanide
shift reagents, Eu(fod)3
and Pr(fod)3, on the nuclear magnetic
resonance spectra of some (η4-cyclopentadienone)(η- cyclopentadienyl)cobalt complexes has been investigated as
an aid to structure determination in this series. The lanthanides complex with
the lone pairs of the carbonyl group. Pseudocontact shifts are observed for
hydrogens attached to each ring and for hydrogen atoms in substituents on the cyclopentadienone.
With Eu(fod)3,
contact shifts are also observed for the cyclopentadienone ring hydrogens.
Thermal decomposition and mass spectra of 2-iodoethyl p-tolyl sulphide
Authors: Radwan HH , Williams LR
Published: September 2010

2-Iodoethyl p-tolyl
sulphide may be prepared from 2-hydroxyethyl p- tolyl sulphide via the
orthophenylene phosphite ester. At temperatures of about 100� it was converted
into 1,2-bis(p-tolylthio)-ethane with concomitant liberation of iodine. The
mass spectrum of the 2-iodoethyl p-tolyl sulphide revealed that the molecule
fragmented by ionization of the halogen atom while the mass spectra of the
corresponding chloro and bromo derivatives revealed fragments resulting from
ionization at both the sulphur and halogen atoms.
The synthesis of Tetracyclo[5,3,1,03,5,04,9]undecan-2-one and the acid-catalysed and reductive cleavages of the cyclopropyl ring
Authors: Hamon DPG , Taylor GF
Published: September 2010

Tetracyclo[5,3,1,03,5,04,9]undecan-2-one
(2,4-dehydro-5-homoadamantanone) (3) was synthesized by copper-catalysed
intramolecular insertion of a diazoketone into a double bond. Acid-catalysed
opening of the cyclopropyl ring in aqueous acetic acid cleaved the C3-C4 bond
to give a mixture of exo-7-hydroxytricyclo[4,3,1,13,8]undecan-4-one
(13) and its acetate (12). Under the same conditions except for the presence of
bromide ion, a mixture of (12), (13) and exo-7- bromotricyclo[4,3,1,13,8]-undecan-4-one
(17) was obtained. Reduction of (17) with LiAlH4 gave homoadamantanol. Reduction of (3) with lithium in liquid
ammonia gave cleavage of the C 3-C 5 bond to afford tricyclo[5,3,1,04,9]-undecan-2-one
(4), the structure of which was confirmed by independent synthesis.
Enthalpies of mixing of dimethyl sulphide + carbon tetrachloride and dimethyl sulphide + chloroform
Authors: Gray DF , Williamson AG
Published: September 2010

Enthalpies of mixing at
278.15 K, 288.15 K and 298.15 K are reported for mixtures of dimethyl sulphide +
carbon tetrachloride and dimethyl sulphide + chloroform. The enthalpies of
mixing for both systems are negative. At T = 298.15 K, x = 0.5 the enthalpy of
mixing of the carbon tetrachloride mixture is approximately -450 J mol-1
and for the chloroform mixture it is approximately -1350 J mol-1.
For both systems the temperature coefficients are small and positive.
Synthesis, properties and long range 203,205Tl-13C couplings in the 13C N.M.R. spectrum of an unusual dimethylthallium(III) complex of 4,4'-Diethoxycarbonyl-3,3',5,5'-tetramethyldipyrromethene
Authors: Hsieh ATT , Rogers CA , West BO
Published: September 2010

The title complex* has been
prepared and characterized by elementary analysis, mass and 1H and 13C
n.m.r, spectroscopy. Long range203,205 T1-13C couplings
are observed in its 13C N.M.R. spectrum, the assignments of which
are discussed.
The pulse radiolysis of decaborane-14 solutions
Authors: Brown BJ , Sangster DF
Published: September 2010

Results for the pulse
radiolysis of B10H14 in selected solvent systems are
reported. In polar solvents the solvated electron is rapidly scavenged by B10H14
with k >~ 2x1010 1. mol-1 s-1. In H2O,
CH30H and C2H50H a transient optical
absorption (G x ε ≈ 104 1. mol-1 cm-1)
attributed to boranyl radicals is observed. A lower
yield is observed in aqueous acid and hydrocarbon solutions and in the presence
of electron scavengers. The results are consistent with an electron scavenging
reaction leading to formation of a boranyl radical.
Some hydroxyamidines and amidoximes
Authors: Briggs LH , Cambie RC , Dean IC , Rutledge PS
Published: September 2010

A number of hydroxyamidines
and amidoximes have been prepared in order to examine if their chelating system
can lead to cytotoxic compounds. Most compounds are toxic but all are inactive
against experimental tumours. The i.r., u.v. and N.M.R. spectra of the
hydroxyamidines are discussed.
Synthesis and characterization of N-Chloro-o-nitroanilines
Authors: Chapman KJ , Dyall LK
Published: September 2010

Chlorine(1) oxide in carbon
tetrachloride was found to be an effective reagent for N-chlorinating 2-nitroanilines. These N-chloro-2-nitroanilines are sufficiently stable in solution at 20�
to be characterized by reduction and by proton n.m.r, and infrared spectra. The
infrared N-H stretching frequencies fall near the low value of 3330 cm-1,
apparently because of interaction between N-H bond and chlorine lone pairs;
there are also effects of intramolecular hydrogen bonding and of conformation.
Under acid catalysis, N-chloro-2-nitroaniline
rearranges to C-chlorinated 2-nitroanilines, while with alkali it cyclizes to benzofuroxan. The
acid-catalysed reaction has the same features as the Orton rearrangement of N-chloroacetanilides.
A convenient procedure for the quantitative generation of carbocations in super acid media
Authors: Kelly DP , Brown HC
Published: September 2010

A method is described for
the preparation of relatively concentrated (c.1 M) solutions of alkyl carbocations
in SbF5-SO2ClF suitable for 13C n.m.r,
investigations. This method, which uses syringe techniques, allows the
quantitative conversion of precursors, which are soluble in SO2CIF
at -78º, into the corresponding cations. The carbocations prepared in this way
include isopropyl (1), t-butyl (2), 1,l-dimethylpropyl (3) 1,l-dimethylbutyl
(4), 1-ethyl-1-methylpropyl (5), 1,1,2-trimethylpropyl (6), 1-methylcyclopentyl
(7), 1,2-dimethylcyclopentyl (8), 2-norbornyl (10), 2-methylnorbornyl (11) and
1-methyl-1-phenylethyl(12). Other methods were needed to generate the
bicyclo[3,3,0]octyl(9), 1-adamantyl (l3),
2-methyladamantyl(14) and benzhydryl(l5) cations. 13C
parameters are given for all the cations.
Depsidone synthesis. VI. Colensoic acid
Authors: Djura P , Sargent MV
Published: September 2010

The synthesis of the lichen
depsidone colensoic acid (1) (8-hydroxy-3-methoxy-11-oxo-1,6-dipentyl-
11H-dibenzo[b,e][l,4]dioxepin-7-carboxylic acid) by Ullmann reaction of benzyl-2-bromo-4-methoxy-
6-pentylbenzoate (18) and methyl 4,6-dibenzyloxy-3-hydroxy-2-pentylbenzoate
(27) and subsequent steps is described.
Pigments of marine animals. XII. The synthesis of certain substituted naphthopyrones related to crinoid pigments
Authors: Rideout JA , Smith IR , Sutherland MD
Published: September 2010

Syntheses of
5,6,8-trimethoxy-2-propyl-4H-naphtho[2,3-b]pyran-4-one, 5,6,8,10-tetramethoxy-2-propyl-4H-naphtho[2,3-b]pyran-4-one,
5,8,10-trimethoxy-2-propyl-4H-naphtho[l,2-b]pyran-4-one and 5,6,8,10-tetramethoxy-2-propyl-4H-naphtho[l,2-b]pyran-4-one
are described. The products confirm the structures assigned previously to the crinoid pigments neocomantherin, comaparvin, 6-methoxycomaparvinand 6-methoxycomaparvin
5-methyl ether.
The sorption of zinc species by clay minerals
Authors: Farrah H , Pickering WF
Published: September 2010

The effect of changes in pH
and the presence of ligands on the uptake of zinc ions by three types of clay
mineral (kaolinite, illite and montmorillonite) has been investigated. In
alkaline media the clay suspension acts as a nucleation centre for polymeric
hydroxy species, and the major role of many ligands is to mask the
precipitation process. Uncharged and negatively charged species are not sorbed
to any measurable extent. In acidic media the adsorption capacity of the clays
for zinc increases with pH and possible mechanisms are considered. For
kaolinite and illite the controlling process appears to be the attachment of
hydroxy species to particular sites on the particle edges; with montmorillonite
ion exchange at negative lattice sites appears predominant. Of particular
interest is the apparent affinity between montmorillonite and species
containing nitrogen functional groups.
The influence of pressure on the infrared spectra of hydrogen-bonded solids. IV. Miscellaneous compounds
Authors: Hamann SD , Linton M
Published: September 2010

Measurements have been made
of the influence of pressure on the stretching and bending frequencies of
hydrogen bonds in a further series of 15 solid compounds. Two exceptions have
been found tothe general rule that an
increase of pressure decreases the X-H stretching frequencies of weak and
medium-strength X-H....Y bonds. Possible explanations are offered of the
exceptions.
Kinetics and mechanisms of the oxidation of methyl aryl ketones by acid permanganate
Authors: Nath MP , Banerji KK
Published: September 2010

The oxidation of six methyl
aryl ketones by acid permanganate has been studied, in the presence of fluoride
ions. The products of the oxidation are formaldehyde and the corresponding
benzoic acids.The oxidation is first
order with respect to each the ketone, the oxidant and hydrogen ions. The reaction
rate increases sharply with the increase in the amount of acetic acid in the
solvent. The oxidation of acetophenone exhibits the
kinetic isotope effect, kH/kD =
4.60 at 30�C. The solvent isotope effect is given by k(D2O)/k(H2O)
= 5.03. The acid-catalysed enolization rate of the
ketones has been measured by the bromination method. The activation parameters
for both the oxidationand enolization
reactions have been evaluated. The oxidation is slower than the acid-catalysed enolization. The relative rates of the oxidation are
proportional to the relative rates of enolization.These results coupled with
the magnitude of the solvent isotope effect suggest that the enol form of the ketone is involved in the oxidation
process. A possible mechanism has been suggested.
Chemical studies of the Proteaceae. IX. Synthesis of 5-alkylresorcinols from aliphatic precursors
Authors: Cleaver L , Croft JA , Ritchie E , Taylor WC
Published: September 2010

Methods for the
aromatization of ethyl 6-alkyl-2,4-dioxocyclohexanecarboxylates, available from
the base-catalysed condensation between α, β-unsaturated esters and acetoacetic ester, and related substances have been
explored. 5-Nonyl- and 5-tridecyl-resorcinol (grevillol)
have been synthesized by this route but it is not suitable for the synthesis of
5-alkenylresorcinols or substances of the striatol type.
Mercury(II) cyanide complexes with 4,4'-Bipyridine and 4,4'-(Propane-1,3-diyl)-bispyridine
Authors: Ahuja IS , Singh R
Published: September 2010

1:1 Coordination complexes
formed by mercury(11) cyanide with 4,4'-bipyridine and 4,4'-(propane-1,3-diyl)bispyridine have been prepared and characterized by molar
conductance, molecular weight and infrared spectral measurements down to 200 cm-1
in the solid state. The 4,4'-bipyridine complex is shown to have a polymeric
chain structure with a tetrahedral environment of two nitrogen atoms of bridging
4,4'-bipyridine and two carbon atoms of the terminally bonded cyano groups
about the mercury atoms. The 4,4'-(propane-1,3-diyl)bispyridine
complex is suggested to have a monomeric three-coordinate structure with only
terminally bonded 4,4'-(propane-1,3-diyl)bispyridine
and cyano groups.
Phosphineiminato complexes of molybdenum(V)
Authors: Beilharz GR , Scott D , Wedd AG
Published: September 2010

The molybdenum(v) compounds
[MoCl4(NPR3)(OPR3)] (PR3 = PPh2Pr,
PPh3, PEtPh2, PMe2Ph, PEt3,�Ph2PC2H4PPh2)
are formed in the reaction between the molybdenum(1V) complex [MoCl4(PR3)2]
and p-toluenesulphonyl
azide and also between [MoCl4(EtCN)2],
the phosphine and the azide.
The reaction of isocyanates and isocyanates with bisulphite salts
Authors: Dalton JR , Kirkpatrick A , Maclaren JA
Published: September 2010

Organic isocyanates and
isothiocyanates readily add bisulphite to form
N-substituted aminooxomethanesulphonic acid salts
(2), and the thioxo analogues respectively. As aryl
isocyanates react rapidly with water, it is convenient to use triethylammonium bisulphite in an
aprotic solvent for the addition. Aqueous solutions of these salts (2) are
generally stable to storage although the alkyl derivatives are rather more
stable than the aryl derivatives.
Iminyl radicals in gas-phase synthesis. I. Generation of nitriles by pyrolysis of aryl azines
Authors: Bird KJ , Chan AWK , Crow WD
Published: September 2010

Low-pressure gas-phase
pyrolysis of aryl aldehyde azines leads to formation
of the corresponding aryl cyanides in varying yield, together with small
amounts of the corresponding stilbenes. In the case
of benzaldehyde azine, stilbene
formation is shown to be an intermolecular reaction. Certain substituent groups
show some thermal decomposition, but this can be avoided by the use of the
wines of alkyl aryl ketones; excellent nitrile yields are then obtained. The
reaction is postulated as proceeding by unimolecular
decomposition of the iminyl radicals formed by
cleavage of the central N-N bond; thermochemical estimates are discussed. Azines from furan- and thiophen-2-carbaldehydes produce
1,2-di(2-furyl)ethylene-and 1,2-di(2- thienyl)ethylene
respectively as well as the expected nitriles. As in the azines
of alkyl aryl ketones, however, no alkenes are formed on pyrolysis of the azines from 2-acetylfuran and 2-acetylthiophen.
Oxidation reactions of Dicarbonylbis[ethane-1,2-diylbis(diphenylphosphine)]-molybdenum
Authors: Snow MR , Wimmer FL
Published: September 2010

The complex Mo(CO),(dpe), [dpe is ethane-1,2-diylbis(diphenylphosphine)]* reacts with oxidants
(MOPF6, NOCl, Br,, 12) to form the cations [M0(C0)~(dpe)~X(]X+ = F, C1, Br, I). The products
have been characterized by conductance, i.r. and n.m.r. (31P, 19F) spectroscopy. Low-temperature
31P n.m.r. spectra show that [M0(C0),(dpe)~F]+ is rigid while [Mo(CO),(dpe),Br]+ and [Mo(CO),-
(dpe)JIt are fluxional; a possible cause of this non-rigidity is discussed. [M0(C0)~(dpe)~X]+
(X = C1, Br) reacts with X- to form [M0(C0)~(dpe),X~w]h ich polymerizes to [ M O ( C O ) ~ ( ~ ~ ~ ) ~ . ~ X ~ with loss of dpe. [M0(CO)~(dpe)~1r]e+a cts with I2 to form [Mo(CO),(dpe)I,]. The product formed
from NOPFs with dichloromethane as solvent, originally formulated as cis-[M0(C0)~(dpe)J PF6,
is shown to be the fluoro complex, [M0(C0)~(dpe),F]P F6. A fluoro-bridged species is obtained
in nitromethane, [{M0(C0)~(dpe)~)(~PFF],) ,, a compound originally formulated as cis-[Mo(CO),-
( d ~ e )(~P]F 6)2. The fluoro bridged compound is cleaved and substituted by reaction with halide
ion to give [ M O ( C O ) ~ ( ~ ~ ~(X) ~= .C~1, XB~r) ]in~ w hich one diphosphine bridges the two metal
atoms. Oxidation of Mo(CO),(dpe), by NOPFs in coordinating solvents (Y = MeCN, PhCN) gives
[M0(C0)~(dpe)~Y]~T+he. se dications, which have been characterized by conductance, i.r. and 'H
n.m.r. spectroscopy, are also formed by adding AgClO, to [M~(CO)~(dpe)~(xXl += Br, I) in the
appropriate solvent.
Oxidation of Flavan-3-ols to 3-Oxoflavans
Authors: Clark-Lewis JW , Ilsley AH
Published: September 2010

3-Oxoflavan and 4?-methoxy-3-oxoflavan
were prepared by Pfitzner- Moffatt
oxidation of the corresponding trans-flavan-3-ols, but similar oxidation of
2,3-trans-7,8,3?,4?-tetramethoxyflavan-3-led to an inseparable mixture of
7,8,3?,4?-tetramethoxy-3-oxoflavan and 7,8,3?,4?-tetramethoxy-3-methylthiomethoxyflav-3-ene.
Pyrolysis of 2,3- trans-3,4-cis-acetoxy-7,4?-dimethoxyflavan-3-ol led to
formation of 7,4?-dimethoxy-3-oxoflavan and 2,3-tuans-3,4-cis-3-acetoxy-7,4?-
dimethoxyflavan-4-ol(by migration of the acetyl group). N.m.r. data are
recorded for the compounds obtained.
Synthesis of the Perimidin-4- and -6-one systems
Authors: Cameron DW , Samuel EL
Published: September 2010

A simple and efficient
method has been devised for the synthesis of π- deficient perimidin-4- and
-6-one systems, which were of interest in connection with their reactivity
towards nucleophiles. The procedure entails successively, the conversion of
substituted naphthalenes into 1,8-dinitro derivatives, reduction to 1,8-diamines,
formation of perimidines and dihydroperimidines by treatment with carbonyl
compounds, and finally oxidation with Fremy's salt.
The course of oxidation was determined by the positions of the other
substituents. A number of methyl- and chloro-substituted perimidin-4- and
-6-ones have been identified. ��� Oxidation of the intermediate 1,8-diamines
produced several new 5- amino-1,4-naphthoquinones as well as 8-amino-1,2-naphthoquinones.
Simple derivatives of the latter system have not been previously reported.
Nitrones and oxaziridines. XVI. Synthesis of 3-Hydroxyimino- and 3-Oxo-1-pyrroline 1-oxides by reductive cyclization reactions
Authors: Black DSC , Boscacci AB
Published: September 2010

5,5-Dimethyl-2-phenyl- (8a),
2-t-butyl-5,5-dimethyl- (8b) and 2,5,5- trimethyl- (8c) 3-oxo-1-pyrroline 1-oxides
have been synthesized by hydrolysis of the respective
3-hydroxyimino-1-pyrroline 1-oxides,which have in turn been prepared by the
sequential nitrosation and reductive cyclization of γ-nitrocarbonyl
compounds.
Synthesis of the lichen depside 2-O-Methylconfluentic acid
Authors: Elix JA , Ferguson BA
Published: September 2010

The total synthesis of the
depside 2-O-methylconfluentic acid is reported.
Gas-liquid critical temperatures of mixtures containing electron donors
Authors: Campbell GJ , Hurle RL , Lie SP , Young CL
Published: September 2010

The gas-liquid critical
temperatures, Tcm, of some mixtures of the electron donors,
triethylamine, diethyl ether and diisopropyl ether with n-alkanes, benzene and
hexafluorobenzene are reported. By using the van der Waals one-fluid model, an
interaction energy parameter, ξ, has been calculated for each mixture from
the values of T°m. The values of ξ for the n-alkane+electron
donors are fairly close to unity, indicating that, as would be expected, there
are no strong specific interactions between the unlike molecules. The values of
( for the electron donors with benzene give no definite indication of specific
interactions. On the other hand, values of ξ for the electron donors with
hexafluorobenzene indicate a specific interaction between the unlike molecules.
These conclusions are discussed in relation to those reached from a
consideration of other thermodynamic data.
Acid-catalysed isomerization of ethyl 5-Hydroxy-7a-methyl-1-oxo-2,6,7,7a tetrahydro-1H-indene-4-carboxylate
Authors: Collins DJ , Tomkins CW
Published: September 2010

Treatment of a chloroform
solution of ethyl 5-hydroxy-7a-methyl-1-oxo- 2,6,7,7a-tetrahydro-1H-indene-4-carboxylate
with dry hydrogen chloride at room temperature gave ethyl 5-hydroxy-7a-methyl-1-oxo-cis-3a,6,7,7a-
tetrahydro-1H-indene-4-carboxylate, and the corresponding trans-hydrindan in
the ratio 9 : 1. Hydrogenation of this mixture gave ethyl
5-hydroxy-7a-methyl-1-oxo-cis-3a,6,7,7a-tetrahydroindan-4-carboxylate, and
ethyl t-7a-methyl-1,5-dioxo-r-3a,4,5,6,7,7a-hexa-hydroindan-c-4a- carboxylate,
which were characterized by conversion into the cis and trans isomers of
7a-methylperhydroindan-1,5-dione, respectively.
The preparation and photochemical properties of some 1,3-Diphenyl-2-pyrazolines containing a heteroaromatic substituent
Authors: Lin J , Rivett DE , Wilshire JFK
Published: September 2010

Several 1,3-diphenyl- and
1,3,5-triphenyl-2-pyrazolines containing a heteroaromatic substituent (viz.
imidazol-1-yl, pyrazol-1-yl and 1,2,4- triazol-1-yl) have been synthesized.
When compared with their unsubstituted analogues, these compounds (a) absorbed
more intensely at a longer wavelength, (b) exhibited greater fluorescence in a
polar solvent (methanol) and (c) possessed similar stability to light. ��� Large-scale irradiations of two
1,3,5-triphenyl-2-pyrazolines (viz. unsubstituted and that containing the
1,2,4-triazol-1-yl substituent) in methanolic solution revealed that, although
dehydrogenation of the 2-pyrazoline ring was the major photochemical reaction,
significant oxidation to the corresponding chalcone also occurred. In addition,
phenol was detected among the irradiation products. ��� Several sulphonated analogues of the
abovementioned pyrazolines were prepared. When applied to wool, these compounds
exhibited excellent fluorescent whitening properties.
Chemical Constitution and Activity of Bipyridylium Herbicides. XII. Diquaternary Salts of 6-Methyl-2,2'-bipyridyl and 2-Methyl-4,4'-bipyridyl
Authors: Schmalzl K , Summers L
Published: September 2010

6-Methyl- and
6-ethyl-2,2?-bipyridyl and 2-methyl-4,4?-bipyridyl have been prepared by
reaction of the appropriate alkyllithiums with 2,2?- and 4,4?-bipyridyl. The
alkylbipyridyls have been converted into diquaternary salts related to the
herbicides diquat and paraquat. Two of the salts, 4-methyl-6,7-dihydrodipyrido[1,2-a:2?,1?-c]pyrazinediium dibromide and 1,1?,2-trimethyl-4,4?-bipyridinediiumdibromide,
are about as active as post-emergent herbicides as diquat and paraquat.
Synthesis and systemic fungicidal activity of N-(2-Bromo-2,2-dichloro-1-arylaminoethyl)formamides and related compounds
Authors: Summers LA , Carter GA
Published: September 2010

The synthesis of several
analogues of the fungicides triforine and chloraniformethan is described. The
compounds comprise N-(2,2,2- trichloro-1-arylaminoethyl)formamides and
N-(2-bromo-2,2-dichloro-1- arylaminoethyl)formamides. Several of the compounds
are highly effective protectant and systemic fungicides.
Formation of diphenylmercury from phenylmercury(II) amino-acid complexes
Authors: Canty AJ , Kishimoto R
Published: September 2010

The preparation and characterization
of phenylmercury(II) complexes of L-cysteine and DL-penicillamine are reported.
Infrared and Raman spectra of the new complex μ-cysteinato-S,N-bis[phenylmercury(n)]
monohydrate and of previously reported complexes of L-cysteine and DL- penicillamine
are compared. The complexes decompose to form diphenylmercury when stirred as
suspensions in benzene at ambient temperature.
The reaction of barium chromate(V) with lithium-potassium nitrate eutectic melt
Authors: Meehan BJ , Tariq SA
Published: September 2010

The reaction of barium
chromate(v) with molten lithium-potassium nitrate eutectic was investigated and
the stoichiometry of the reaction established. The results of this study
indicate that nitryl ion, NO2+, is possibly an
acidic/oxidizing species produced by the autoionization of nitrate ion when a
nitrate melt functions as a reactive solvent.
Electrochemical investigation of contact angle and of flotation in the presence of alkylxanthates. II. Galena and pyrite surfaces
Authors: Gardner JR , Woods R
Published: September 2010

The contact angle between a
nitrogen bubble and galena and pyrite surfaces immersed in methyl-, ethyl- or
butyl-xanthates has been determined as a function of the electrode potential
and of the quantity of xanthate species formed by interaction with the mineral
surface. For galena, the initial chemisorbed xanthate layer was found to be
hydrophobic when ethyl- or butyl-xanthates were employed, but hydrophilic for
the methyl homologue. The presence of dixanthogen enhanced the contact angle
but the metal xanthate diminished it. This conclusion was supported by contact
angle studies at a lead electrode. For pyrite the surface was hydrophilic
except when dixanthogen was formed, but a significant quantity was required on
the mineral surface before a finite contact angle was observed. This behaviour
is interpreted in terms of the presence of hydrated iron oxide on the pyrite
surface. ��� The potentials at which particulate bed
electrodes of galena and pyrite begin to float were determined for ethyl- and
butyl- xanthates. The potentials correspond to the regions where chemisorption
of xanthate takes place on galena and where significant quantities of
dixanthogen are formed on pyrite. ��� With butylxanthate,
flotation was inhibited when excessive quantities of xanthate species were
present on galena or pyrite. The inhibition arose from flocculation of the
mineral particles.
The rearrangement of some epoxy podocarpanoic acids
Authors: Hancock WS , Mander LN , Massy-Westropp RA
Published: September 2010

Rearrangement of the
epoxides derived from the podocarpenoic acids (3b), (3d) and (5b) with boron
trifluoride etherate gave compounds with the rosane skeleton, lacking
substituents at C 13. The rearrangement involves the shift of a methyl group
with concomitant lactonization. The unsaturated acids (3b) and (5b) undergo
similar rearrangements when they are treated with boron trifluoride etherate or
sulphuric acid.
Photolysis of isoeugenol
Authors: Leary G
Published: September 2010

Photolysis of isoeugenol
leads to E-Z isomerization, solvent addition, and the formation of
dehydro-dimers.
Pressure effects on the rates of some hydrogen/deuterium transfer reactions between 2,2-Diphenyl-1-picrylhydrazyl and substituted phenols
Authors: Palmer DA , Kelm H
Published: September 2010

The volumes of activation
for hydrogen transfer reactions between 2,2- diphenyl-1-picrylhydrazyl (dpph) and a series of substituted phenols
(2,4,6-tri-t-butylphenol, 2,6-di-t-butylphenol, 2,6-di-t-butyl-4- methylphenol, 2,4,6-trimethylphenol and 2,4,6-triphenylphenol)
were measured in toluene at 25�C up to pressures of 2 kbar.
The analogous deuterium transfer reactions were studied in the case of the
first three phenols. The obtained volumes of activation, ΔV?expt
proved to be independent of the nature of the phenol and the extent of
deuteration. The overall mean value of ΔV?expt is
-13�3 ml mol-1 and can be virtually entirely attributed to intrinsic
molecular changes, ΔV?intr.
From results of the effect of pressure on the first overtone of the O-H
stretching frequency for a number of selected phenols in CS2, and
from the lack of influence of pressure on the primary kinetic isotope effect,
it is concluded that ΔV?ntr is essentially
independent of moderate pressures.
Depsidone synthesis. IX. Nornotatic acid and notatic acid
Authors: Djura P , Sargent MV
Published: September 2010

New syntheses of the lichen
depsidone 8-hydroxy-3-methoxy-1,4,6- trimethyl-11-oxo-11H-dibenzo-[b,e][1,4]dioxepin-7-carboxylic acid (notatic acid) (1) are
described. The synthesis of 3,8-dihydroxy- 1,4,6-trimethyl-11-oxo-11H-dibenzo[b,e][1,4]dioxepin-7carboxylc acid (2) is described. It was
identical with the depsidone nornotatic acid isolated from the lichen Parmelia
weberi Hale.
1,3-Dipolar cycloaddition of cis-2,3-Dibenzoyl-1-phenylaziridine
Authors: Duewell H
Published: September 2010

cis-2,3-Dibenzoyl-1-phenylaziridine
is highly reactive in 1,3-dipolar cycloadditions. Reactions with dimethyl
fumarate and with dimethyl maleate at 125�C yield together all possible
isomeric dimethyl 2,5- dibenzoyl-1-phenylpyrrolidine-3,4-dicarboxylates. Cycloadditions
with reactive dipolarophiles at 85�C lead to adducts derived from the parent
aziridine without isomerization of the intermediate ylid.
The sorption of lead and cadmium species by clay minerals
Authors: Farrah H , Pickering WF
Published: September 2010

The effect of pH changes
and the presence of ligands on the uptake of lead and cadmium ions by three
types of clay mineral (kaolinite, illite and montmorillonite) has been
investigated. ��� In the absence of ligands, metal ion
adsorption increases gradually with increasing pH until a threshold pH value is
exceeded, whereupon total precipitation/sorption (attributed to formation of
hydroxy species) occurs. With ligands present, the threshold point tends to
shift to higher pH values, the magnitude of the effect depending on the
stability of the metal complex formed. Adsorption of cationic metal complexes
is subject to competition from charged protonated ligand species; anionic
complexes are not sorbed.
Solvation of ions. Some applications. II. Electrolysis of copper(I) sulphate in water-nitrile mixtures
Authors: MacLeod ID , Muir DM , Parker AJ , Singh P
Published: September 2010

Organic nitriles stabilize
acidic aqueous copper(I) sulphate solutions. Electrolysis of such solutions
provides an alternative for the electrowinning and electrorefining of copper.
The Cu+/CuO and Cu2+/Cu+
standard reduction potentials in aqueous solutions containing acetonitrile or
3-hydroxy-propanenitrile (hydracrylonitrile) differ from those in water, due to
the specific solvation and stabilization of the copper(I) ion by either
nitrile. In the mixed solvent, the solvation sphere around the copper(I) ion
contains organic nitrile, rather than water, and this reduces the mobility of
Cu+ and slows its diffusion to the electrode surface in a working
cell. The copper(II) ion contains water in its solvation shell in the mixed
solvent. Thus for dilute solutions, the diffusion coefficient of the copper(I)
ion in 10 mole % aqueous acetonitrile is about two-thirds and in 10% 3- hydroxypropane-nitrile-water is about one-fifth that of the
copper(II) ion in water. In concentrated solutions containing sulphuric acid,
the copper(II) ion diffuses as ion pairs and this reduces its mobility. This
effect is not observed for copper(I) ions. Cell voltages measured during the
electrolysis of copper(I) sulphate solutions by using soluble copper, insoluble
platinum or insoluble carbon anodes are analysed in terms of the ohmic
resistance, the equilibrium potential, the charge-transfer overpotential and
the diffusion polarization of the working cell. There is a significant
charge-transfer overpotential for the oxidation of Cu+ to Cu2+
at an insoluble graphite anode in 6 mol dm-3 acetonitrile-water
solutions; the rate constant is 4 x 10-4 cm s-1. At
platinum the rate constant is 1.6 x 10-2 cm s-1.
The nitration in acetic acid of 9-Acetoxy- and 9-Methoxy-10-phenylanthracenes
Authors: Christoffersen HD , Hartshorn MP , Richards KE
Published: September 2010

Nitration of 9-acetoxy-10-phenylanthracene
(1a) in acetic acid gives the nitro diacetate (2a),
10-acetoxy-10-phenylanthrone (3), 10-hydroxy- 10-phenylanthrone (4) and
10-nitro-10-phenylanthrone (5), the 10- acetoxy (3) and 10-hydroxy (4)
compounds being formed from the unstable nitro diacetate (2a). Nitration ipso
to the acetoxy group in (1a) is therefore the major (c. 80%) reaction pathway.
Nitration of the 9- methoxy compound (1b) gives predominantly (> 80%) the
10-nitro compound (5) and small amounts of the 10-acetoxy compound (3).
Synthesis and structural studies of some tetrathiocyanate and tetraselenocyanate binuclear mixed-metal complexes
Authors: Singh PP , Yadav SP , Sharma SB
Published: September 2010

Complexes of MM?(XCN)4
(M = CoII, NiII;
M? = ZnII, CdII,
HgII; X = S, Se) with triphenyl-phosphine
have been synthesized and characterized by elementary analysis, molar
conductance, magnetic moment, infrared and electronic spectral studies. All the
complexes are binuclear mixed- metal monomeric bridged of the type (Ph3P)2M(NCX)2M?(XCN)2
except for [Ni(PPh3)4] [Zn(NCS)4] which is
cationic-anionic.
Syntheses and 1H N.M.R. spectra of a series of Bis(benzylthio)methanes and the corresponding series of Bis(benzylsulphonyl)methanes
Authors: Ang KP , Tan SF , Lee TWS
Published: September 2010

A series of
bis(benzylthio)methanes, C6H5CH2SCHYSCH2C6H5
with Y = p-FC6H4, p-ClC6H4, p-BrC6H4,
p-CH3C6H4, p-CH3OC6H4
and CH3, and the corresponding bis(benzylsulphonyl)-methanes, C6H5CH2SO2CHYSO2CH2C6H5,
have been synthesized and their 1H N.M.R. spectra examined. Magnetic
non- equivalence of the methylene protons has been observed in both series.
Photoelectron spectroscopic studies of the Propyl- and Allyl-substituted amines
Authors: Peel JB , Willett GD
Published: September 2010

The HeI
(21.22 eV) photoelectron spectra of the mono-, di- and tri- propyl- and allyl-substituted amines are
reported up to 21 eV. The assignments are based on SPINDO
calculations, on the comparison with other related molecules, a density of
states analysis and a sum rule treatment. The first ionization potential band
in each of the spectra is assigned to the nitrogen lone-pair electrons and for
the allylamines the second band is assigned to the ethylenic π-bond
electrons.