bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Assignment of the Molecular Vibrations of Hexachlorobenzene
Authors: Saëki Shinnosuke 
Published: July 2006

Abstract
The infrared absorption spectra of hexachlo-robenzene were measured in a gaseous state from 4000 to 300 cm−1, and in solid state from 300 to 100 cm−1. The Raman spectra of the same substance were measured in solutions in benzene, carbon tetrachloride and carbon disulfide. The depolarization ratio of each Raman line was also observed qualitatively. The assignment of the observed absorption bands and Raman lines was determined, partly by referring to that of benzene.
The Infrared Absorption Spectra of p-Dichlorobenzene and p-Dichlorobenzene-d4
Authors: Saëki Shinnosuke 
Published: July 2006

Abstract
The infrared absorption spectra of p-dichloro-benzene and p-dichlorobenzene-d4 were measured from 300 to 700 cm−1 in a gaseous state with cesium bromide prism, from 300 to 100 cm−1 in a solid state with gratings, and, using a newly constructed long path (720 cm.) high temperature cell, from 1700 to 700 cm−1 in a gaseous state with a sodium chloride prism. The frequencies and band envelopes of observed absorption bands were reported.
On the basis of these results, the assignment of the infrared active normal vibrations of these molecules was determined. The assignment was checked by means of the application of the product rule, and the correctness was verified by the good agreement between the theoretical and experimental values.
The assignment was also determined for the observed combination bands, using the Raman fundamental frequencies presented in the previous paper as well as infrared frequencies.
Infrared Absorption Spectra of Hydrazides. II. Sodium Hydrazides
Authors: Mashima Mitsuo 
Published: July 2006

Abstract
The infrared absorption spectra of HCONH·NCOH· Na, CH3CONHNCOCH3· Na, CH3CON·HNCOC6H5· Na, and C6H5CONHNCOC6H5· Na and their N-deuterated derivatives have been examined in the rock salt region. The characteristic frequencies of the ions (RCON·HNCOR′)- have been obtained, and the influence of an electronic charge on the amide frequencies has been discussed.
The Reaction of Tropoids and Quinone Derivatives. II. Reaction of Several Tropolones and p-Benzoquinone
Authors: Seto Shuichi , Sato Humio 
Published: July 2006

Abstract
Reaction of tropolone and p-benzoquinone was carried out in methanol containing acetic acid and the structure of products so obtained was determined. Tropolone gave 5-(4′-hydroxyphenoxy)tropolone and 3-(p-benzoquinonyl)-tropolone, 3-bromotropolone gave 3-bromo-7-(p-benzoquinonyl) tropolone, and 3, 7-dibromotropolene gave 3,7-dibromo 5-4′-hydroxy-phenoxy)tropolone by this reaction. Benzofurotropones were derived from benzoquinonyltropolones.
In order to prove the structure of the product by admixture, benzocoumarin derivative was prepared by the reaction of the diazonium salt of anthranilate and p-benzoquinone.
A Kinetic Study of the Isotopic Exchange of Indium between the Indium Ion and its N-2-Hydroxyethylethylenediamine-N,N′,N′-triacetate Complex in an Acid Solution
Authors: Saito Kazuo , Tsuchimoto (nee Tamura) Michiko 
Published: July 2006

Abstract
1) The isotopic exchange of indium between the indium ion and its EDTA-OH complex was kinetically studied in an acid solution, indium-114 m being used as tracer.
2) Separation of the indium ion from its EDTA-OH complex was satisfactorily carried out with 8-quinolinol (oxin) at a pH about 3, and no appreciable heterogeneous exchange was observed between the precipitate and the solute.
3) The exchange constant R was proportional to the concentration of the complex, the hydrogen ion and the ions such as dihydrogen citrate, but was independent of the concentration of the indium ion. It was affected by the ionic strength to a less extent, and the Arrhenius activation energy was 11 kcal. per mole.
4) A plausible reaction mechanism was postulated on the basis of the kinetic data. The dissociation of the protonated indium EDTA-OH complex appears to be the ratedetermining step.
De-localization of Bond Eigenfunctions in π-Electronic Systems. IV. Non-Empirical Calculation of the π-Electronic States of the Cyclobutadiene Molecule
Authors: Takekiyo Shozaburo 
Published: July 2006

Abstract
Calculations of the π-electronic energy levels, the wave functions, and the probabilities of the resonance structures of cyclobutadiene molecule have been made by an approximate method, proposed in part I, using the nonorthogonal Slater orbitals. Results have agreed quantitatively with the values calculated by the usual HLSP method.
Calculations have also been made using the orthogonalized atomic orbitals. Agreement of the results with those obtained by the usual method has been recognized.
Studies on the Reduction of Phosphorus Trichloride with Copper Powder in Non or Less Polar Solvents
Authors: Nakagawa Masanao 
Published: July 2006

Abstract
A phosphorus trichloride solution in non or less plar solvents was subjected to reaction with copper powder in a flask equipped with a reflux condenser or in an autoclave with an inner tube of “Teflon” and the resulting solution was examined with respect to the phosphorus content and the ratio of Cl/P. By these treatments the phosphorus trichloride was partially reduced with copper powder, and the phosphorus content decreased by the formation of a certain compound of phosphorus trichloride or its lower chloride or phosphorus with copper or cuprous chloride. The degree of the reduction depends on the property of the solvent and on the temperature of the treatment, whereas the decrease in the phosphorus content slightly depends on the property of the solvent. Silicon tetrachloride inhibits the reaction even at 200°C. This action may be due either to the adsorption of silicon tetrachloride on the surface of copper powder or to the solvation of phosphorus trichloride with silicon tetrachloride, or it may be due to the effects of both the adsorption and the solvation.
Vinyl Copolymerization. I. Copolymerization of Acrylonitrile with Methyl Methacrylate
Authors: Suzuki Momotaro , Miyama Hajime , Fujimoto Shiro 
Published: July 2006

Abstract
Rates of copolymerization, of AN-MM for various mixing ratios of the two monomers were measured by the thermistor method. The heat of copolymerization, which was obtained by comparing the results of the thermistor method with those of the usual analytical method, agrees very well with Alfrey’s equation. Also, the non-constancy of φ can be explained by Arlman’s theory. It is concluded that the termination constants for mixed radicals are larger than those homogenous radicals and, furthermore, that the rate constant for a normal cross-termination reaction is about ten times as large as that of the cross-termination reaction having a penultimate unit.
Thermal Decomposition of Acetaldehyde in the Presence of Hydrogen Sulfide. I. Kinetics of the Reaction
Authors: Imai Naomi , Yoshida Yasuo , Toyama Osamu 
Published: July 2006

Abstract
The hydrogen sulfide-catalyzed thermal decomposition of acetaldehyde has been investigated over the temperature range 340 to 494°C. The initial rates of decomposition approximately fit the rate equation
−d[CH3CHO]⁄dt=k[H2S] [CH3CHO]
+k′[H2S] [CH3CHO]1⁄2
where
k=1012.7±1.0exp(−31400±3100⁄RT) mol−1ml.sec−1
and
k′=1012±0.27exp(−41100±1200⁄RT) mol−1⁄2ml1⁄2sec−1
A comparison of the above results with those of the decomposition inhibited by propylene and isobutylene, which will be reported on in the following paper, suggests that the first term of the rate equation probably represents a molecular decomposition catalyzed by hydrogen sulfide, while the second represents a radical-chain decomposition. Combining the chain mechanism generally accepted for the pyrolysis of acetaldehyde alone with the reactions CH3+H2S=CH4+HS and HS+CH3CHO=H2S+CH3CO, both of which have been shown to be important in the photolysis of acetaldehyde with added hydrogen sulfide, a rate equation is derived by which the second term of the experimental rate equation and the temperature depedennce of its rate constant k′ can be explained.
Determination of Deuterium in Organic Compounds
Authors: Tamiya Nobuo 
Published: July 2006

Abstract
A device to simplify the deuterium analysis of organic compounds was described. The combustion of organic samples and the reduction of deuterium containing the water produced were both carried out in sealed glass tubes. By this procedure one could completely avoid the “memory effect” and get satisfactory results, as shown by the examples of amino acid analysis.
Using Iron Ores of Kalabagh. I. Production of Limonite-Alkali Method
Authors: Ali M I 
Published: July 2006

Abstract
An industrial process of limonite production has been developed in this laboratory using local iron oxide ore of Kalabagh by alkali method. Sodium hydroxide was allowed to react with pulverized ore at 200∼225°C to produce sodium ferrite. This product was then hydrolyzed to obtain hydrated ferric oxide (limonite) and alkali in aqueous solution. The method was further modified in the light of some operational difficulties.
Hydrolysis was carried out under varied conditions for maximum recovery of alkali and the recovery upto 80% found to be economical. A graphical representation of this recovery was also given.
Effects of Tyrosyl Residue on the Polypeptide Monolayers
Authors: Yamashita Takuya , Isemura Toshizo 
Published: July 2006

Abstract
The monolayers of poly-Dl-phenylalanine (I), poly-l-tyrosine (II), copoly-1:1-(l-tyrosine, l-phenylalanine) (III), copoly-1:1: 2-(l-tyrosine, o-benzyl-l-tyrosine, l-phenylalanine) (IV), and copoly-1: 1-(l-tyrosine, glycine) (V) have been investigated at the air/water and oil/water interfaces.
The surface moment of I decreased by 50∼60 mD more on alkaline than on the acid subphase, probably owing to the keto-enol transformation of the peptide bond. The decrease in the surface moment of II is about 100 mD; this decrease seems to be caused by the ionization of the side chains and by the enolation of the peptide bond.
At the air/water interface, the effects of the dissociation of the tyrosyl residue on the II-A relations of II, III, IV and V were not very remarkable, probably because of the peptenol effect and the van der Waals force between side chains. It was found that the monolayers of I, II, III and IV assume a β-configuration. On the other hand, the film of V occupies much less area per residue than those in the β-form, which might be attributed to the folded structure caused by the strong intrachain hydrogen bond due to the glycyl residue.
At the oil/water interface, the films of I, III and V expand more and the change in subphase pH seems to be more effective than at the air/water interface. These facts might be caused by the release of van der Waals force between the side chains.
Infrared Spectra of Troponoid Compounds. V. Absorption Bands in the Region of 1700∼1530 cm−1 of Tropone, 2-Chlorotropone and Tropolone
Authors: Ikegami Yusaku 
Published: July 2006

Abstract
Infrared absorption spectra of tropone, 2-chlorotropone, and tropolone in the region of 1700∼1500 cm−1 were measured in various states and in various solvents, and the variation of two strong Bands I and II in the region of 1700∼1530 cm−1 was investigated. The data are shown in tables and figures. These two bands are explained as the participation of both of the C=O and C=C stretching vibrations in a tropone skeleton. The variation of the spectrum of tropolone with the measuring condition is much smaller than that of tropone. This is because the carbonyl group in tropolone is fixed by the intramolecular hydrogen bond.
The Electronic Spectra and Structures of s-Triaminobenzenium and Some Related Ions
Authors: Mataga Noboru 
Published: July 2006

Abstract
The electronic spectra and electronic structure of TAB and TABH+ have been studied by the MO method. The calculated spectra agree satisfactorily with the observed values. The stabilities of the protonation products of various aminobenzenes have been studied by Hückel MO calculations. The results of these calculations give an interpretation of the observed facts that TAB in an aqueous solution is easily protonated on the ring carbon (pK∼5.5), although no such protonation occurs in the case of aniline or m-phenylenediamine, where the amino group is protonated. The stability of the protonation product of TOB has also been studied.
It has been pointed out that the spectum of TABH+ is rather similar to that of benzenium ion, although the basicity of the former is much larger than that of the latter. This fact has been explained theoretically.
Further, it has been observed that a relation between the calculated localization energy and the observed basicity constant for the protonation similar to those of many aromatic hydrocarbons approximately holds for TAB and TOB.
Distribution of Inorganic Impurities in Graphite Electrodes
Authors: Inagaki Michio , Noda Tokiti 
Published: July 2006

Abstract
The distribution of inorganic impurities in graphite electrodes was investigated by means of radiography, ash pattern technique and sulfur print technique. The pattern of the radiograph of an electrode corresponded closely with its ash pattern.
Radiography of graphite electrode was proved to be useful in showing not only the distribution of inorganic impurities in the electrode, but also the texture of the electrode, such as the shape and distribution of both coke grains and pores.
Synthetic Studies of the Derivatives of Nitroacetic Acid. II. The Synthesis of Isoxazolecarboxylic Acids from α,β-Unsaturated α-Nitroesters
Authors: Zen Shonosuke , Umezawa Sumio 
Published: July 2006

Abstract
1) α,β-Unsaturated α-nitroesters react with n-butylamine to give 4-substituted isoxazole-3,5-carboxylic butylamides. This is a new synthesis of isoxazole derivatives.
2) The mechanistic features of the above reaction have been explained.
3) The mild alkaline hydrolysis of the above butylamides gave 4-substituted isoxazole-3,5-dicarboxylic acids.
The Luminescence Spectra of Triply-ionized Rare Earths in the Calcination Products of Some Magnesium Compounds
Authors: Iwase Eiichi , Nishiyama Seijiro 
Published: July 2006

Abstract
(i) The luminescence spectra of samarium(III), europium(III), terbium(III) and dysprosium(III) ions embedded in the calcination products of Mg(NO3)2·6H2O, MgSO4·7H2O and MgCl2·6H2O have been studied under excitation by cathode-ray bombardment at room temperature. The calcination of these ions was carried out either at about 900°C for 30 min. or by further heating at about 1800°C for 5 min.
(ii) The luminescence spectrum of each of the rare earth ions in magnesium oxide matrix was obtained in its pure form in the case of the calcination products derived from Mg(NO3)2·6H2O. A number of distinguishing diffuse luminescence bands were observed arising from the sulfate component remaining in the calcination products derived from MgSO4·7H2O. Calcination products derived from MgCl2·6H2O had a composition very near that of magnesium oxide and contained only a small amount of chlorine. When the triplyionized rare earths here investigated were embedded in these calcination products, several intense and sharp luminescence bands were found which cannot be ascribed to those observed in pure magnesium oxide, but presumably result from their chlorine content.
(iii) The luminescence spectra of these triplyionized rare earths embedded in the matrices derived from the calcination of MgSO4·7H2O and MgCl2·6H2O were considered to be constituted of the bands observed in the matrix of pure magnesium oxide and those characteristic of a matrix containing either a sulfate- or chloride-component. The frequencies of some of the principal bands characteristic of the presence of sulfate- and chloride-components have been given for each of the triplyionized rare earths investigated here.
(iv) As to the intensity of the luminescence of samarium(III), europium(III), terbium(III) and dysprosium(III) ions embedded in the matrices of calcined magnesium compounds, the magnitude of variation arising from heat treatment at elevated temperatures may be arranged in the order of rare earth ions with increasing atomic numbers 62∼66, the most marked decrease being seen in the luminescence of samarium(III) ions with the smallest atomic number (62), and the most marked increase, in that of dysprosium(III) ions with the largest number (66).
Synthesis of Dl-Glutamic Acid from 1,1,1,5-Tetrachloropentane
Authors: Saotome Kazuo , Yamazaki Toshiaki 
Published: July 2006

Abstract
Dl-Glutamic acid has been synthesized from 1,1,1,5-tetrachloropentane. The process involves five steps through 1,1,1-trichloro-5-hydroxypentane (92%), 5,5,5-trichlorovaleric acid (94%), 5,5-dichloro-4-pentenoic acid (85%), α-chloroglutaric acid (82%), and Dl-glutamic acid (87%). The over-all field from 1,1,1,5-tetrachloropentane to Dl-glutamic acid was 52%.
In the dehydrochlorination of 5,5,5-trichlorovaleric acid to 5,5-dichloro-4-pentenoic acid, rather weak Lewis acid catalysts, such as bismuth chloride and zinc chloride were found to give the best results.
Studies on Amino-hexoses. VI. The Synthesis of Phenyl 2-Acetamido-3-O-(d-1′-carboxyethyl)-2-deoxy-α- and β-d-Glucopyranoside and Their Methyl Esters
Authors: Yamamoto Kazuhiko , Fujinaga Mamoru , Matsushima Yoshio 
Published: July 2006

Abstract
A convenient method for the synthesis of anomeric phenyl glycosides of N-acetyl muramic acid and their methyl esters has been described. The test of lysozyme action on these model substrates was negative.
The expenses of this research were covered by U.S. Public Health Service Grant No. AI-04586-02.
The Absorption Spectra of Cobalt(III) Complexes. III. The Spin-forbidden Bands
Authors: Fujita Junnosuke , Shimura Yoichi 
Published: July 2006

Abstract
The near infrared, visible and near ultraviolet absorption spectra of about fifty complexes of cobalt(III) have been measured and the data discussed mainly in order to find the relationships existing among the two weak spin-forbidden bands and the two well-known spin-allowed bands.
Studies of the Synthetic Inorganic Ion Exchanger. II. The Properties of Stannic Phosphate
Authors: Inoue Yasushi 
Published: July 2006

Abstract
A recommended procedure for the preparation of stannic phosphate and a discussion of its ion exchange properties have been presented.
Some of the results obtained are as follows.
1) The density of the stannic phosphate is 2.17 g./cm3.
2) Stannic phosphate is a weakly acidic cation exchanger and possesses several dissociable hydrogen atoms in the range of pKa. values. In a weakly acidic solution, in which the exchanger is useful, the exchange group having the pKa value of approximately three is most important.
3) The ion exchange equilibrium can be elucidated by the mass action law.
4) The affinity series for alkali metal coincides with the usual relationship observed in the ion exchange resin.
5) The rate-determining step is assumed to be the migration of ions through the water retained in the gel structure.
6) Stannic phosphate is unstable against heat treatment in air; that is, the separation of alkali metal does not go well with the exchanger dried at 110°C due to the slow rate of exchange.
7) It is fairly stable against heat treatment in water; that is, it undergoes only a slight decrease in ion exchange capacity even when it is treated in water at 250°C for 8 days.
8) It is stable against irradiation of about 109r.
9) The structure of stannic phosphate has been suggested on the basis of its thermal decomposition curve, its exchange capacity, its titration curves, and its X-ray diffraction patterns.
The Spectrophotometric Determination of Vanadium(IV) with Xylenol Orange
Authors: Otomo Makoto 
Published: July 2006

Abstract
The reddish-violet complex of vanadium with xylenol orange has been studied spectrophotometrically, and the conditions for using xylenol orange as a reagent for the determination of trace amounts of vanadium have been established. The complex shows a maximum absorption at 562 mμ, and the molar extinction coefficient of the complex is found to be 24000. It is a 1:1 complex and has a formation constant of 2.8×106 under the conditions studied. Such anions as oxalate, citrate and EDTA inhibit the color formation of the complex. Some of the interfering cations can, however, be completely or partially masked by adding a fluoride solution.
The Nuclear Magnetic Resonance Spectra of Olefinic Protons and the Substituent Effects. III. Trans-forms of Methyl β-Substituted Acrylates, β-Substituted Vinyl Methyl Ketones and β-Substituted Acryloyl Chlorides
Authors: Niwa Jun , Kasiwagi Hazime 
Published: July 2006

Abstract
In the NMR absorption of the trans-forms of β-substituted acrylates, β-substituted vinyl methyl ketones and β-substituted acryloyl chlorides, the chemical shifts of protons situated at the cis-position to the substituents have been roughly determined by Hammett’s σp and Taft’s parameter, 0.40σI+0.70σR. From a comparison of the HA-shifts of the six olefinic systems (RCHA=CHBX, R=CH3, C6H5, H, CO2CH3, COCH3, COCl), these systems have been classified into two types—one, systems resembling the benzene derivatives, and the other, resembling the ethylene derivatives. Nevertheless, it has also been observed that the slope of each correlation line, on the whole, decreased in the order of the σ-value of the invariable substituent. The methyl proton shifts of β-substituted trans-acrylates, too, depend upon Hammett’s σp. The shifts of the proton (HB) at the β-positon can not be discussed from the viewpoint of Hammett’s substituent effect. However, they relate qualitatively with the electronegativity of the first atom of the substituent group.
The Rheological Properties of Concentrated Suspensions. I. Some Theoretical Considerations Based on a Network Model
Authors: Takano Masaharu 
Published: July 2006

Abstract
The rheological properties of concentrated suspensions have been considered theoretically by the use of a network model in which the particles are linked at random by thermal and mechanical actions.
The effects of particle size, the viscosity of the medium and the mean free energy of the activation for breaking links between particles have been taken into account in the calculation of the number of interparticle links.
The links between particles have been conveniently distinguished into two kinds in stationary states: the primary links, which are elongated without the separation of neighboring particles in an instant, and the secondary links, which are broken and reformed reversibly in an instant. The primary links originate from circular structures in the flocculates.
The dynamic properties at very small deformations and the stationary flow properties have been derived theoretically as functions of the concentration and of the frequency or the rate of shear by assuming a generalized Maxwell model modified by Eyring’s non-linear viscous elements.
The correlation of the dynamic properties and the stationary flow properties and the dependence of the dynamic properties on amplitude have been considered theoretically by the use of the present network model.
Asymmetric Hydrogenation with Modified Raney Nickel. II. Studies on Modified Hydrogenation Catalyst. III
Authors: Izumi Yoshiharu , Imaida Masami , Fukawa Hideaki , Akabori Shiro 
Published: July 2006

Abstract
1) The asymmetric R-Ni catalysts were prepared by the treatment of R-Ni with various asymmetric compounds, and the asymmetric activity of a catalyst was measured by the hydrogenation of methyl acetoacetate
2) Optical rotatory direction and power of the reduced product was affected both by the configuration and molecular size of amino acid which was used as modifying reagent.
3) The asymmetric activity of catalysts treated with N-substituted amino acids, N-acyl, N-dimethyl and N-cyanoethyl derivatives of Glu and Asp, were much less than the activity of the catalyst treated with the corresponding amino acids.
4) The asymmetric activity of the catalyst treated with d-tartaric acid and l-malic acid was tested at various conditions. The asymmetric yield in the hydrogenation of methyl acetoacetate in the presence of the catalyst treated with d-tartaric acid solution of pH 5.1∼5.2 at 100°C was about 45 percent.