bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hydrogen Deformation Vibrations
Authors: Nakagawa Ichiro , Mizushima San-ichiro 
Published: July 2006

Abstract
The CH, CH2 and CH3 deformation frequencies in various organic compounds and the NH3 deformation frequencies in metal ammine complexes have been calculated based on the Urey-Bradley field. The fact that diagonal terms of G-matrices for these vibrations are much larger than the cross terms makes the approximate calculation quite easy. The frequency range of each of these vibrations has been tabulated and their specific features have been pointed out, which will aid in the assignment of the frequencies observed for many organic compounds and metal ammine complexes.
Studies on the Cooking Mechanism of Wood. XII. On the Nature of the weakly Acidic Group of Lignosulphonic Acid
Authors: Mikawa Hiroshi , Sato Koichiro , Takasaki Chizuko , Ebisawa Kiyo 
Published: July 2006

Abstract
α-Lignosulphonic acid has about one weak carboxyl group per 8–9 methoxyl, and about the same, or somewhat lesser amount of conductometrically titrable phenolic hydroxyl group, and both these groups correspond to the so-called weakly acidic group of lignosulphonic acid.
Semi- and Photo-conductivity of Molecular Single Crystals. Anthracene and Pyrene
Authors: Inokuchi Hiroo 
Published: July 2006

Abstract
The electrical resistivity and photoconductivity of single crystals—anthracene and pyrene—, which could be grown by slow evaporation of a solvent over a month in Solvesso, were measured. The temperature dependency of electrical resistivity (ρ) has been expressed by the next formula, ρ=ρ0 exp (Δε⁄2kT), and the values of resistivity (ρaT 15°) and thermal activation energy (Δε) are 1022Ω cm., for anthracene and 1020Ω cm., 2.4 eV. for pyrene. This activation energy and the longest wave edges of absorption spectra in the solid state coincided with each other, then this phenomenon will be due to the fact that molecular single crystals are intrinsic semi-conductors as in the case of powdered form.
Spectrochemical Study of Microscopic Crystals. X. The Absorption Spectra and Configuration of Bis(ethylenediamine)-copper(II) Complexes
Authors: Yamada Shoichiro , Tsuchida Ryutaro 
Published: July 2006

Abstract
Polarized absorption spectra of bis (ethylenediamine)-copper(II) perchlorate, nitrate dihydrate and tetrathiocyanato-mercurate(II) in the crystalline state have been determined by Tsuchida-Kobayashi’s microscopic method in the region between 2400 and 7000Å. These compounds all show a band at about 50×1013/sec. (band A) and another absorption at a wave-length shorter than 90×1013/sec. (band B).
The band A of the latter two compounds suffers bathochromic effect, and the polarization property for the band B is reversed, as compared with the former. From these differences, it has been concluded that in the former two compounds, OH2 or NCS− causes a considerable effect upon the copper atom.
Using the results of the measurements, the nature of the absorption bands and absorption spectra of the complex ion in aqueous solution has been discussed.
Electronic States of the C2 Radical
Authors: Fueki Kenji , Higuchi Jiro 
Published: July 2006

Abstract
LCAO MO’s and ionization energies have been calculated for the 3Σ9− KK′ (1σg)2(1σu)2(1πu)2(2σg)2 and 1Σg+KK′(1σg)2(1σu)2(1πu)4 state of the C2 radical at the internuclear distance of 1.33 Å using the LCAO-SCF method. The interactions of all the electrons have been taken into consideration, but the orthogonality relationship between the Is and the other orbitals was assumed. The LCAO MO’s obtained are in good agreement with those predicted by Mulliken. Using these LCAO MO’s, the lower electronic states have been investigated without configuration interaction. The calculated levels are generally in good agreement with the experimental. The ground state obtained is the 3Σg− state, while the observed is the 3IIu, but the result is not conclusive because of the ignorance of the inner-shell-outer-shell-mixing.
On the Base Strength of Some Nitrogen Heterocycles in the Excited State
Authors: Mataga Noboru , Kaifu Yozo , Koizumi Masao 
Published: July 2006

Abstract
1. The fluorescence and absorption spectra of aqueous solutions of quinoline, acridine and 2,8-diaminoacridine were observed at various pH values, and it became clear that the stabilization energy by proton addition is larger in the excited state than in the ground state.
2. The effects of hydrogen bonding and proton addition upon the spectra were confirmed to be the same in tendency.
3. On the basis of the fluorescence intensities in various organic solvents, some discussions were made about the contribution of non-bonding electron to the inner quenching of fluorescence.
4. The vapor spectrum of quinoline was-taken and line spectra were observed, which are most certainly attributable to n→π* transition.
Ultraviolet Spectrophotometric Determination of Nickel with α-Benzil dioxime.
Authors: Uzumasa Yasumitsu , Washizuka Shigenari 
Published: July 2006

Abstract
A new method described here involves the extraction of nickel (II)-benzildioxime with chloroform and the spectrophotometric measurements of the colored system in the same solvent. The wide pH range for the extraction eliminates the use of a buffer, and nickel is readily separated from ferric iron, aluminum, zinc, chromate, vanadate, and molybdate ions. By obviating the excessive benzildioxime with dilute alkali, the most sensitive absorbance readings are achieved, and the sensitivity at 275 mμ is 0.0013. Beer’s law holds up to 1 p. p. m. of nickel at 275 mμ, and up to 4 p. p. m. at 358 and 406 mμ. The nature and degree of interference of copper and cobalt on the color development are also discussed, and their allowable amounts are determined.
Studies on Crystals of Metallic Tris-ethylenediamine-complexes. I. The Crystal Structure of Dl-Tris-ethylenediamine-cobalt (III) Chloride Trihydrate, [Co en3]Cl3·3H2O
Authors: Nakatsu Kazumi , Saito Yoshihiko , Kuroya Hisao 
Published: July 2006

Abstract
The crystal structure of [Co en3]Cl3·3H2O has been determined by X-ray methods. It is trigonal D3d4–P\bar3c1 with four formula units in a cell of dimensions: a=11.50±0.02, c=15.52±0.04 Å. The configuration of the two stereoisomeric complex ions [Co en3]3+ is described. The three ethylenediamine molecules in a complex ion assume “ gauche ” forms; their nitrogen atoms form a slightly distorted octahedron around a central cobalt atom. It is shown that ionic bonds essentially link the complex ions in the structure. The watermolecules are weakly associated to chlorine it is found that a single crystal can be completely dehydrated by gently heating at 120°C, without bringing about any remarkable change in its appearance, except a loss. of transparency. A single crystal oscillation photograph was obtained even after complete dehydration.
Solvent Effects upon Fluorescence Spectra and the Dipolemoments of Excited Molecules
Authors: Mataga Noboru , Kaifu Yozo , Koizumi Masao 
Published: July 2006

Abstract
A general formula for the difference of solvent shifts of fluorescence and absorption spectra in the approximation of long range dipolar interaction was derived using Ooshika’s theory of light absorption in solution.
Measurements of fluorescence and absorption spectra of some naphthalene derivatives in various organic solvents were undertaken, and the data were analysed by the theoretical formula. The formula reproduces the experimental data satisfactorily, and from this fact it was concluded that the most predominant factor which determines the difference of solvent shifts of fluorescence and absorption spectra of these molecules is the interaction energy between solute and solvent molecules due to orientation polarization. The incremental values of dipolemoments in the excited state were estimated, and those for α-, β-naphthols and β-naphthyl methyl ether were interpreted as due to the increase of electron migration from the substituent in the excited state.
Studies on Serine Peptides. II Synthesis of Optically Active Serine Peptide Derivatives
Authors: Okawa Kenzi 
Published: July 2006

Abstract
The derivatives of optically active textscl-seryl peptides containing trifunctional amino acids have been synthesized by the Sheehan’s method in good yield.
In this method, the free hydroxyl group of the serine must have been substituted by a suitable protecting group, fx. benzyl rest, in order to obtain good results.
Rheology of Surface Films. V. Mechanical Behaviours and Structures of 6-Nylon at Air Water Interface
Authors: Inokuchi Kiyoshi 
Published: July 2006

Abstract
(1) Surface films of 6-nylon at air/water interface were investigated by means of electron microscopic observation together with the study of the surface pressure and potential.
(2) An unique structure involving the microfibrils of about 40 A thick were revealed which are formed from the monomolecular network at large areas, and are transformed to polyfibrillar layer during the compression process.
(3) Network structures of the film were divided into two types: a monomolecular network at large areas, and a network of the microfibrillar structure at small areas. Rheological characteristics of 6-nylon film were explained in terms of such structures.
(4) Many evidences were provided which support the view that the surface pressure measured with this film is not likely to have the osmotic pressure as commonly considered, but is intimately related to the surface elasticity of the film.
(5) It was observed that the compression process orients the microfibrils at right angles to the direction of compression. This phenomenon was explained by the anisotropy of surface pressure set up by the compression of the film.
Ionization Potentials of Some Organic Molecules. II. Aliphatic Compounds
Authors: Omura Itiro , Higasi Keniti , Baba Hiroaki 
Published: July 2006

Abstract
Ionization potentials of seven alcohols, three amines and nine other aliphatic compounds were determined by a mass spectrometer of Hagstrum type. In view of the fact that no reliable explanation of the ionization potentials of molecules has been given an examination of the possible interpretations of the results was presented. The relation of ionization potentials to the dipole moments, nonbonding electrons and the group orbital method are briefly discussed.
Ionization Potentials of Some Organic Molecules. III. Aromatic and Conjugated Compounds
Authors: Baba Hiroaki , Omura Itiro , Higasi Keniti 
Published: July 2006

Abstract
First ionization potentials of 18 aromatic and conjugated compounds were measured by the electron impact method. Seven out of these were newly determined in the present work. Discussion of the results was given with special reference to their relation to the ultraviolet data.
It was suggested that the ionization potential in benzene derivatives are primarily determined by π-electrons, while those in pyridine and picolines are largely by one of the non-bonding electrons belonging to the N atoms in the ring.
Ultraviolet Absorption Spectra of 4-Chloro- and Bromo-pyridine N-Oxides
Authors: Hata Norisuke 
Published: July 2006

Abstract
The solution spectra of 4-chloro- and bromopyridine N-oxides were measured in various solvents, in each of which were observed two-absorption regions, one weak and the other strong.
The weak one was assigned to the transition involving the excitation of an oxygen non-bonding electron and the strong one to the transition involving the excitation of a π-electron.
Irreversible Photobleaching of the Solution of Fluorescent Dyes. II. Photobleaching of the Alcoholic Solution of Eosine in Vacuo
Authors: Imamura Masashi , Koizumi Masao 
Published: July 2006

Abstract
Photobleaching of eosine in methanol, ethanol, isopropanol and n-butanol in vacuo was investigated and it was concluded that the primary process is the dehydrogenation of alcohols by the metastable excited eosine molecule. In the presence of oxygen, the photobleaching is suppressed completely, but the sensitized photoöxidation of alcohol takes place.
When a small amount of oxygen is added to the evacuated alcoholic solution of eosine, the induction period appears, after which the photobleaching proceeds with almost the same rate as that in the evacuated state. Both the quantum yield for the consumption of oxygen during the induction period (γ) and that of the photobleaching in vacuo (k) were determined and the ratio γ/k was found to be ca. 3. This result and the reaction products detected (aldehyde in vacuo, acid and hydrogen peroxide in the presence of oxygen) were satisfactorily explained by the mechanism proposed by Bolland and Cooper. Further results somewhat important from the general standpoint of photobleaching of dye are :
(1) The lifetime of the intermediate to be attacked by oxygen (which is most probably DH·) is not less than 10−2-10−3 sec.
(2) The quantum yield for the primary process of the photobleaching D→D*→Dt(+RH)→DH·(+R·) in pure ethanol is ca. 10×10−4 at 20°C.
(3) In pure ethanolic solution, the decomposition of dye by the interaction between DH· and R· practically does not occur.
Irreversible Photobleaching of the Solution of Fluorescent Dyes. III. Photoreaction of Eosine in the Aqueous Alcoholic Solutions under Evacuated State
Authors: Imamura Masashi , Koizumi Masao 
Published: July 2006

Abstract
The photoreaction of eosine has been studied in ethanol-water mixture in vacuo. Irradiated solution showed a gradual spectral shift towards shorter wavelengths. Analyzing the spectra and applying the chemical method, it was found that the spectral shift is due to the production of uranine.
The rate of disappearance of eosine increases with rising concentration of ethanol until 20 vol. per cent, at which it reaches its maximum and constant value, which is the same as that in pure ethanol.
The primary processes of the aerobic photo-bleaching of eosine in aqueous solution were discussed and it was concluded that the process must be
D^t+O_2→D···O_2\xrightarrow\mathitH2O···prod. (iii)
The Solubility of Silver Bromate in Tetrahydrofuran- Water Mixed Solvents
Authors: Koizumi Ei , Miyamoto Hiroshi 
Published: July 2006

Abstract
To investigate the relation between the solubility of inorganic salts and the dielectric constants of solvents, the solubility of silver bromate in tetrahydrofuran-water mixed solvent was determined at 20°, 25° and 30°C, respectively. The logarithm of solubility is almost reciprocally proportional to the dielectric constant of the solvent in the region of the higher dielectric constant. But no linear relation was found in that of the lower dielectric constant of tetrahydrofuran-water mixed solvent.
Also, the solvation radius of silver bromate was calculated applying the above-mentioned data. The solvation radius is about 1 Å at each temperature.
THE DETERMINATION OF THE VAPOUR PRESSURES OF SODIUM AND POTASSIUM CHLORIDES
Authors: Horiba Shinkichi , Baba Hideo 
Published: July 2006

Abstract
The vapour pressures of NaCl and KCl up to the temperature of 1250°C. were statically determined.
The heats of vapourisation and of dissociation of these salts were calculated from the values of their vapour pressures and the order of the value of the dissociation constant of NaCl in gaseous state was given.
APPLICATION OF AN ELECTROMAGNETIC FORCE TO “THERMOBALANCE”
Authors: Shibata Zen-ichi , Fukushima Masaji 
Published: July 2006

Abstract
The present writers have applied an electromagnet to the “thermo-balance” to remove the previous defects and succeeded in elevating its sensibility to that of the chemical balance. To determine its accuracy, the decomposition curves of the following five compounds have been determined: calcium carbonate, copper sulphate, cadmium sulphate, barium chloride and Mohr salt.
COLORIMETRIC DETERMINATION OF SULPHURIC ACID
Authors: Yamazaki Junzô 
Published: July 2006

Abstract
1. Sulphate is precipitated by benzidine hydrochloride and on resulting precipitate of filtrate the amount of benzidine is determined colorimetrically. From that value, the amount of sulphate is calculated.
2. “Rapid method” is given, which is simple in execution and does not take much time. The purification of benzidine for this method is also given.
3. The methods are applied on urine analyses and seem to be useful especially in clinical works.
4. In ordinary method 2–2.5 mg. H2SO4 per 10 c.c. can be determined; in rapid method 1–1.5 mg. per 5 c.c. is necessary.
5. When any hindering substances are absent, the accuracy of the results always lies within the range of accuracy of colorimetry. In conclusion, the author wishes to express his sincere thanks to Prof. T. Soda for his kind guidance during the work.
THE EFFECT OF GELATINE ON THE POLYMORPHIC TRANSFORMATION OF MERCURIC IODIDE
Authors: Sameshima Jitsusaburo 
Published: July 2006

Abstract
The mercuric iodide containing gelatine shows hysteresis on the transition temperature, i.e. it is necessary to heat considerably higher than 127°C. to transform the red modification into the yellow one, and on the contrary, the yellow one remains unchange for indefinite length of time at the room temperature. In this case gelatine act as a protecting colloid in a solid phase.
A lecture demonstration has been described of showing the behavior of the protected suppercooled mercuric iodide.
The transformation of mercuric iodide of metastable form to that of stable one is accelerated by the light energy.
STUDIES ON THE BROMINATION OF TETRA-ETHYL DICARBOXY-GLUTACONATE AND REMARKS ON THE CONSTITUTION OF THE GLUTACONIC ACIDS
Authors: Urushibara Yoshiyuki 
Published: July 2006

Abstract
By the action of bromine,on tetraethyl dicarboxyglutaconate, tetraethyl α-bromodicarboxyglutaconate was obtained as the final product. When the tetraethyl α- bromodicarboxyglutaconate was saponified by means of hydrochloric acid, the product was α-chloroglutaconic acid. According to the result of this investigation, it was concluded that, when one carries out the saponification of a derivative of glutaconic acid, the constitution of the product cannot be deduced from the starting substance. Uncertainty in J. F. Thorpe’s theory of the normal form was pointed out.
SUPPLEMENTARY STUDIES ON THE NITRILE-ESTERS OF THE DICARBOXYGLUTACONIC ACID
Authors: Urushibara Yoshiyuki 
Published: July 2006

Abstract
The table shows the outlines of synthetical studies made by the present author and others in regard to the nitrile-esters of dicarboxyglutaconic acid. The water of crystallisation which is present in some of the sodium compounds is omitted. The configurations of those written in molecular formulae are not yet known. As to the constitution of those written in the formula (……)2H2O, see this journal, 2 (1927), 29. The details will be found in the following places: (Remark: Graphics omitted.).
Studies on Crystals of Metallic Tris-ethylenediamine-complexes. II. The Crystal Structure of Sodium d-Tris-ethylenediamine-cobalt(III) Chloride Hexahydrate, 2d-[Co en3]Cl3·NaCl·6H2O
Authors: Nakatsu Kazumi , Shiro Motoo , Saito Yoshihiko , Kuroya Hisao 
Published: July 2006

Abstract
The preparation of two mixed salts, 2d-[Co en3]Cl3·NaCl·6H2O and 2l-[Co en3] Cl3·NaCl·6H2O is described. The space group is P3, with one formula unit in a cell of dimensions: a=11.47±0.03 Å, c=8.06±0.02 Å. However, the structure has the pseudo space group P63. By evaluating the functions ρ(XY) and ρ(YZ), projections of the structure on two crystal-lographic planes were obtained. A kind of twinned structure was proposed to get a better agreement between the observed and calculated intensities. The structure shows very close resemblance to that of d,l-[Co en3]Cl3·3H2O. A sodium ion is octahedrally surrounded by six water molecules, with Na ···O distances of 2.62 Å. The whole structure is ionic consisting of the ions [Co en3]3+,[Na(H2O)6] and Cl−.
Studies on the Intramolecular Hydrogen Bond in Conjugated Systems by the Measurements of Dipole Moments. II. Salicylaldehyde and o-Hydroxyacetophenone
Authors: Eda Bunzo , Ito Kazuo 
Published: July 2006

Abstract
Dipole moments of 4-chloro-2-hydroxybenzaldehyde, 5-chloro-2-hydroxybenzaldehyde, 5-methyl-2-hydroxybenzaldehyde, p-chloroacetophenone, p-nitroacetophenone and 5-chloro-2-hydroxyacetophenone were measured in benzene solutions. Their values are 2.31D, 1.37D, 3.32D, 2.40D, 3.29D and 1.79D, respectively. The components of the dipole moments of salicylaldehyde and o-hydroxyacetophenone, which were evaluated from the components of the moments of phenol, benzaldehyde and acetophenone, do not agree at all with the components that satisfy the observed moments of salicylaldehyde and o-hydroxyacetophenone and their derivatives. The magnitudes of the discrepancies are about 1.1D in the x-direction for salicylaldehyde, about 2.3D in the x-direction for o-hydroxyacetophenone, and almost 0.0D in the y-direction for both compounds. It was concluded that the charge migration was caused from the hydroxyl oxygen to the carbonyl oxygen by the intramolecular hydrogen bonding.
Electronic States of para-Benzoquinone. I. Calculation of the Energy Levels by a Semi-empirical Molecular Orbital Method Neglecting Configuration Interaction
Authors: Anno Tosinobu , Matubara Ikuo , Sadô Akira 
Published: July 2006

Abstract
A semi-empirical MO method proposed by Pariser and Parr was extended, taking account of the non-bonding electrons at the heterotoms explicitly as well as π-electorns. The electronic states of p-benzoquione were calculated neglecting cinfiguration insteractions.
Studies on the Organic Phosphorescence. III. Quenching by Some Gases and Vapors
Authors: Kato Shunji 
Published: July 2006

Abstract
The quenching action of some gases and vapors upon the phosphorescence of silica gel-trypaflavine phosphor was investigated. The gases which have more or less quenching effects are O2&gt;NO&gt;SO2, styrene&gt;ether, dioxane, cyclohexene, 2-ethyl-1-hexene, methyl methacrylate, and the gases with no effects (when the quantities are not too large) are N2, Ar, H2, methane, n-hexane, propyrene, benzene, acetone, methanol and water.
The influence of quenching gases on the decay curve of phosphorescence were accurately examined and by analysing them on the basis of the scheme proposed in the preceding paper, it was established that in general S′ is not affected while both T and M state are appreciably affected. Furthermore, it was found that T→S′ transition is not promoted in general.
The quenching actins of O2 and NO were interpreted to be of kinetic type.
Polymorphism of Bis-β-hydroxyethyl Terephthalate
Authors: Miyake Akihisa 
Published: July 2006

Abstract
It is found that bis-β-hydroxyethyl terephthalate shows polymorphism, and there exist at least four different modifications. From the infrared spectra of these modifications, differences between the molecular forms are elucidated to some extent. These differences occur mainly from the difference in configuration of the side chain attached to the benzene ring.
Note on the Polymerization of Dyes in Solution
Authors: Mataga Noboru 
Published: July 2006

Abstract
The effect of concentration on the absorption spectra of DAA and BDAA in various organic solvents was studied in the concentration range from 10−6 to 10−2mol./l. Contrary to Levshin’s opinion, DAA forms polymers higher than dimer very easily in some organic solvents, and the association tendency of DAA is greater than that of BDAA.
Further, the association of these molecules is very sensitive to the solvents used. The association tendency and the spectral shift due to dimerization or polymerization have no correlation with the oscillator strengths of monomeric bands of these molecules, and this is true also for the various dye ions in aqueous solution.
An Electron Diffraction Investigation of the Molecular Structure of 1,4-Dichlorobutyne. I. Determination of Bond Distances and Angles
Authors: Kuchitsu Kôzo 
Published: July 2006

Abstract
The structure of 1,4-dichloro-2-butyne was investigated by means of the sector-microphotometer method of electron diffraction. The following values were obtained: C≡C: 1.214Å, C–C: 1.470±0.025Å, C–Cl: 1.796±0.015Å, and &lt;C–C–Cl: 111°±2°. The C–Cl distance was found to be longer than that in carbon tetrachloride, 1.766±0.01Å.