bluuebunny/crossref_metadata_2025_split huggingface dataset:
The n–π* Transition Band of Acenaphthenequinone
Authors: Kuboyama Akira 
Published: July 2006

Abstract
The weak absorption band (α-band) (εmax∼20) near 500 mμ of acenaphthenequinone was measured in various solvents. This band was determined as the n−π* transition band on the basis of the observed results on intensity and solvent effect. In dioxane, the n−π* transition bands of the o-quinones, including the α-band, largely shift towards shorter wavelengths. This fact, which is thought to be due to molecular complex formation, was discussed from the qualitative point of view. The relative height of the two main peaks of the α-band markedly depends upon solvents. The similar, though less marked, fact is seen in β-naphthoquinone. The two main peaks of the α-band were assumed to be due to the two n–π* transitions, whose transition energy difference is ca. 700 cm−1. It was found that the n–π* transition bands of the quinones, especially of p-benzoquinone, are markedly intensified in carbon disulfide. This fact is probably attributed to the large refractive index of this solvent.
Infrared Spectra of Diacetyl Monoxime and Isonitrosoacetone
Authors: Kimura Masao , Kuroda Yoko , Takagi Hitoshi , Kubo Masaji 
Published: July 2006

Abstract
The infrared absorption spectra of diacetyl monoxime and isonitrosoacetone in solutions were recorded in the rock-salt region. The assignment of observed bands was carried out, taking into account the concentration dependence of the spectra, the effect of deuteration, and the absorptions in the solid state. All the observed frequencies could be interpreted in terms of the molecular form of an oxime type, the presence of molecules in a nitroso form being presumed to be unlikely.
On the Thermal Dissociation of Organic Compounds. XIV. The Effects of the Solvents and of the Substituents on the Thermal Dissociation of Urethans in Amines
Authors: Mukaiyama Teruaki , Akiba Toyohiko , Asahi Tamio 
Published: July 2006

Abstract
N-phenyl-phenyl carbamates dissociate into their component compounds very readily in the presence of a base. Unlike the case of N-phenyl-alkyl carbamates, N-phenyl-phenyl carbamates dissociate in the presence of an equimolar amount of an amine at lower temperature. The kinetics of the dissociation of N-phenyl-phenyl carbamates were of the first order with respect to carbamates and of the first order with respect to base.
The rate constants, the activation energies and the entropies of activation of the dissociation of N-phenyl-phenyl carbamates in various amines and solvents were measured throughout temperature interval 0∼140°C.
The effects of amines, solvents and substituents on the dissociation of urethans in amines were studied.
Oxidation of Terpene Compounds with tert-Butyl Chromate. VI. Oxidation of Terpinolene
Authors: Matsuura Tamon , Saito Kozo , Shimakawa Yasuo 
Published: July 2006

Abstract
Oxidation of terpinolene with tert-butyl chromate was carried out, and piperitenone, 8-hydroxy-p-cymene, p-cymene and α,p-dimethyl-styrene were obtained as reaction products. In this oxidation it was found that the active methylene group at C(3) position in terpinolene was oxidized to a carbonyl group, and that the aromatization of carbon ring in terpinolene molecule took place. This could not be recognized in the oxidation of terpene compounds already reported by this oxidant.
Stereoregular Polymers. VI. Copolymerization with the Ziegler Catalysts
Authors: Murahashi Shunsuke , Nozakura Shun’ichi , Sumi Masao 
Published: July 2006

Abstract
Binary copolymerization of styrene, allyltri-methylsilane and 3-butenyltrimethylsilane was investigated using the Ziegler catalyst at 70°C. It was found to be possible to separate the crystalline part of copolymers by fractional extraction into two kinds of genuine crystalline copolymers, each of which has an extremely different composition from the other.
The nature of the active sites on the catalytic surface was discussed in order to elucidate the above fact.
The constitution of the individual crystalline fractions appeared to vary case by case, i.e., the structure of blockcopolymer might be assigned to some cases and random copolymers to some other cases.
Amylose-Iodine Complex. II. Effects of Inorganic Salts
Authors: Kuge Takashi , Ono Sôzaburo 
Published: July 2006

Abstract
The relations between the light absorptions of the amylose-iodine complex and the concentrations of various added salts have been investigated. The iodide ion appears to be indispensable for the formation of the blue complex. The complex formation can be greatly aided by certain salts when the concentration of iodide is low. This salt effect suggests that the parallel-oriented aggregation of amyloseiodine helical complex is essential for the formation of the stable blue complex.
The Structure of Aureothin. XI. On the Structure of Some of the Isoaureothin Derivatives
Authors: Yamada Kiyoyuki , Naito Takayuki , Okuhara Kunio , Nakata Hisao , Hirata Yoshimasa 
Published: July 2006

Abstract
During the course of the investigation of isoaureothin (I), several derivatives were obtained, the structure of which still remains unknown. The structure of these derivatives is presented in this paper on a basis of spectral and chemical evidence. The reduction of isoaureothamine (IIa) with lithium borohydride yielded an unexpected acidic substance, aminol H (IIIa) the formation of which, taken in conjunction with that of N-acetyl aminol A (IVa), provides an unusual type of reduction by complex metal hydride. Treatment of N-acetyl iso-aureothamine (IIb) with alkali yielded an optically inactive substance, Lactol, which was formulated as VIII. The action of acetic anhydride on Lactol resulted in the formation of racemate of N-acetyl isoaureothamine (IIb).
Studies on Organic Peroxides. VI. Thermal Analysis of the Decomposition of Benzoyl Peroxide by Ferrous Ion
Authors: Hasegawa Shigeo , Nishimura Norio , Miura Kimpei 
Published: July 2006

Abstract
The thermal analysis method was applied to follow the rate of the decomposition of benzoyl peroxide catalysed by ferrous ion in methanol, ethanol, n-propanol and n-butanol.
The apparent rates were of the first order and no fundamental difference in the reaction mechanism was observed among these alcohols. However, the reaction rates in methanol were much slower than in three other alcohols. Solvent effects on the reaction rate were discussed.
Linear enthalpy-entropy relationship was deduced, assuming that the free energy of activation is the linear function of an intensity factor in a series of reactions. This was found to be true in our case.
The Thermal Decomposition of Acetaldehyde in the Presence of Methanethiol
Authors: Imai Naomi , Toyama Osamu 
Published: July 2006

Abstract
Acetaldehyde has been decomposed thermally in the presence of methanethiol over the temperature range from 400° to 440°C. The presence of methanethiol markedly enhances the rate of decomposition. Analysis of the initial rates of decomposition obtained under various experimental conditions suggests: a) one of the chain-carrying steps CH3+CH3CHO=CH4+CH3CO (5) in the decomposition of acetaldehyde alone is replaced by CH3+CH3SH=CH4+CH3S (10) and CH3S+CH3CHO=CH3SH+CH3CO (11) in the presence of methanethiol; b) the reaction CH3SH=CH3+SH (7), in addition to CH3CHO=CH3+CHO (1), contributes to the chain initiation; c) the chain terminates by the combination of methylthio radicals in contrast to the decomposition in the presence of hydrogen sulfide where the chain-ending step is the combination of methyl radicals under similar experimental conditions; d) k5⁄k11=0.8exp(−2,800⁄RT) and k1⁄k7=130exp(−11,000⁄RT), the latter expression being less certain.
Thermodynamic Studies on Cobalt Complexes. VII. Solubility of Erdmann’s Salt and Related Complexes
Authors: Mori Motoshichi , Tsuchiya Ryokichi , Kyuno Eishin , Nishide Takashi 
Published: July 2006

Abstract
The solubilities of Erdmann’s salt, NH4[Co(NH3)2(NO2)4], and the following complexes which have the same complex anion, K[Co(NH3)2(NO2)4], cis- and trans-[Co(NH3)4(NO2)2] [Co(NH3)2 (NO2)4], [Co(NH3)5NO2] [Co(NH3)2(NO2)4]2, [Co(NH3)5Cl] [Co(NH3)2(NO2)4]2] and [Co (NH3)6] [Co(NH3) 2(NO2)4]3were measured. Based upon the thermodynamic functions calculated from the above measurement, the free energy of solution, the lattice energy and the free energy of formation of these complexes were calculated and discussed.
Density Measurement in Dilute Aqueous Solution of Polyvinyl Alcohol
Authors: Nakanishi Koichiro , Kurata Michio 
Published: July 2006

Abstract
The solution density of polyvinyl alcohol dilute aqueous solution is measured by the use of the method of floating equilibria. This method is proved to be useful for the purpose of precise density and concentration determination of PVA dilute solution. An experimental formula for the density of PVA aqueous solution both as a function of the concentration and polymerization degree of PVA is proposed. The excluded volumes between solute and solvent are estimated from the molecular weight dependence of apparent and partial specific volumes obtained.
Crystal Habit Modification of Strontium Sulfate. I. Habit-Modifying Action of Foreign Substances
Authors: Otani Sadaichi 
Published: July 2006

Abstract
The effect of various impurities on the crystal habit of strontium sulfate were investigated. Solutions containing citrate ion produced a nearly disk-shaped single crystal whose nearly flat surface was parallel to the (001) plane. Nearly two-dimensional spherulite is obtainable from a solution containing EDTA. A minute amount of sodium triphosphate or sodium hexametaphosphate caused the deposition of a relatively large spherulite having a spherical form, which is composed of numerous needle- or wedge-shaped crystallites elongated in the direction of c axis. The habit-modifying action of impurities is discussed in detail.
Flow Properties of Aluminum Soaps-Hydrocarbon Systems
Authors: Shiba Sukekuni 
Published: July 2006

Abstract
Flow properties of aluminum soap-hydrocarbon systems as viscous liquids or plastic bodies are studied with a concentric rotational viscometer. Results are obtained under the rate of shear up to 103 sec−1.
(1) The systems behave as dispersions of soap crystallites with network structures combined by secondary interactions of the particles, and they exhibit marked viscosity increase.
(2) The rheological structures suffer shear breakdown under shear, resulting in decrease in viscosity.
(3) Recovery from the broken structures is impossible, that is, this change is not thixotropic but shear breakdown.
(4) Flow properties change with time while standing at rest.
(5) The effects of concentration, temperature and fatty acids constituting soaps are clarified.
The Adsorption of Dye Mixtures by Cellophane Sheet. I. Temperature and Concentration Dependence of Adsorption from Some Binary Mixtures
Authors: Horiki Yukio , Tanizaki Yoshié , Ando Noboru 
Published: July 2006

Abstract
1) The amount of dyes adsorbed by Cellophane from two mixture dyeings of Chlorazol Sky Blue FF and Chrysophenine G, and Chlorazol Sky Blue FF and p-nitroaniline →γ acid (α-coupling) was measured. Further, the amount in case of single dyeing was also measured.
2) It was assumed that the reduction in adsorption of dyes from mixture dyeing is due to an interaction between the two dyes in the dyebath, and that this interaction means only the formation of complexes. On this assumption, the instability constant in the case of the pair of Blue dye and Yellow dye was calculated, according to the mass action law, but it was impossible to calculate it in the case of the pair of Acid dye and Blue dye, because the composition of complexes of this pair was not constant.
3) How the amount of Blue dye adsorbed from mixture dyeing varies with the sort and the concentration of its partner dye and with the dyeing temperature was discussed from the standpoint of the instability constant and the affinity.
The Anodic Behavior of Cathodically Prepolarized Bright Platinum Electrode in Sulfuric Acid Solution
Authors: Shibata Shigeo 
Published: July 2006

Abstract
The anodic charging curves of a cathodically prepolarized bright platinum electrode in 1 n sulfuric acid solution saturated with hydrogen have been studied by means of a mechanical oscillograph.
The behavior of stage α′ for anodic polarizing c. d. can be explained on the assumption that its stage is due to the molecular hydrogen accumulated in the vicinity of the electrode during the cathodic prepolarization, and that the concentration of the accumulated hydrogen decreases in the same manner as the chemical reaction of first order.
Absorption Spectra of Nitrobenzene Derivatives. I. Spectral Features of o-, m- and p-Isomers
Authors: Semba Kimio 
Published: July 2006

Abstract
The intramolecular charge transfer spectra of some nitrobenzene derivatives were measured in n-hexane. The general features of the absorption spectra and the effect of substituents on the absorption spectra were considered from the concept of the intramolecular charge transfer. The migration effect of electron donating groups was discussed for the nitroaniline in aqueous and hydrochloric acidic solutions. Also other absorption due to the n→π* transition of nitro group was considered.
Synthesis of Several Ketones from Acetaldehyde and Propylene by Gamma-ray Irradiation
Authors: Hirota Kozo , Hatada Motoyoshi 
Published: July 2006

Abstract
It has been found that methylpropylketone and other higher ketones are synthetized with relatively high G values by gamma-ray irradiation on mixtures of acetadehyde and propylene at room temperature, and that the reaction proceeds by a chain mechanism, with acetyl radical produced thereby as the initiator.
A Kinetic Study of Addition Reaction of Vinyl Ether with Carboxylic Acids
Authors: Mukaiyama Teruaki , Nohira Hiroyuki 
Published: July 2006

Abstract
The rate constants, the activation energies and the entropies of activation of the addition reactions of n-butyl vinyl ether with carboxylic acids in dioxane, anisole and toluene were determined. It was found that the reaction is first order with respect to vinyl ether and second order with respect to carboxylic acid, and the rate of the reaction increases as the acidity of carboxylic acid increases and a linear Ham-mett relation is observed in the reaction of meta and para substituted benzoic acids. In the presence of a catalytic amount of phosphoric acid, the rate increases linearly with its concentration. The addition involves two stages, namely the initial formation of intermediate complex from vinyl ether and carboxylic acid, followed by the reaction of the complex with another carboxylic acid. In addition, the solvent effect has been clarified and a general acid catalyzed reaction has been discussed in view of these results.
Spectrophotometric Determination of Nitrous Acid with Disodium 1-(4′-Aminobenzeneazo)-amino-8-hydroxynaphthalene-2′, 6-disulfonate
Authors: Katsube Yukiteru , Yoe John H 
Published: July 2006

Abstract
A procedure has been developed for the spectrophotometric determination of trace amounts of nitrous acid with disodium 1-(4′-aminobenzeneazo)-2-amino-8-hydroxynaphthalene-2′, 6-disulfonate. The method is accurate and precise and has a sensitivity of 0.004 γ of nitrous acid per sq. cm. Beer’s law is obeyed up to about 2 p. p. m. of nitrous acid. A study of the effect of many ions on the color reaction has been made. The interference of ferric ion is eliminated by the use of EDTA.
Radiation-induced Polymerization of α-Methylstyrene
Authors: Hirota Kozo , Makino Kenji , Kuwata Keiji , Meshitsuka Gisuke 
Published: July 2006

Abstract
It has been shown that (a) α-methylstyrene polymerizes at room temperatures by gamma-ray irradiation; that (b) the reaction proceeds by a radical mechanism, considering from the effect of solvents, additives and ultraviolet light; that (c) ceiling temperature for this monomer is exceptionally low (ca. 70°C) among vinyl monomers, so that it is hard to obtain high polymers by the usual method; that (d) the experimental fact that the velocity of polymerization is proportional to dose rate and not to square root of dose rate can be explained by the assumption that degradative chain transfer occurs more frequently than the termination between active polymers.
Heats of Formation of Lower Members of Dimethyl- and Methylisopropoxy-cyclopolysiloxanes
Authors: Tanaka Toshio 
Published: July 2006

Abstract
Heats of combustion of lower members of dimethyl- and methylisopropoxy-cyclopolysiloxanes have been measured at 20°C and a constant volume, and the corresponding heats of combustion and formation in isobaric process have been calculated. From the results, the heats of formation of structural units, (Remark: Graphics omitted.) and (Remark: Graphics omitted.), of these compounds from mono-atomic gases have been derived, and it has been found that the ring structures of the cyclic-tetramer and pentamer would be free from strain. Further, the effect of distortion of Si–O–Si valency angle in the cyclic trimer on the heat of formation has been discussed.
Studies on Organic Reagents for Inorganic Analysis. VI. Absorption Spectrum of Phenylfluorone-Metal Chelate and the Nature of the Chelating Bond
Authors: Sano Hirotoshi 
Published: July 2006

Abstract
The absorption spectra of phenylfluoronefourth group metal chelates were investigated by the acid of Kuhn’s free electron gas model method. If the chelating bond formation does not cause an essential change in the π-electron system of the dye molecule, in the more ionic chelating bond, the absorption maximum of the chelate must be closer to the maximum wavelength of the dye anion. Based on the conception in valence-bond method and ionic-covalent resonance, it was theoretically and experimentaly shown that there was a certain relationship between the absorption maximum wavelength of the chelate and the ionicity of the chelating bond. (The ionicity of the bond was estimated from the difference of electronegativity between the metal and the terminal oxygen atom). The results obtained here for the relationship between the ionicity and the electronegativity difference show too close an agreement with the results obtained from the nuclear quadrupole coupling data by Dailey and Townes.
Antioxygenic Activity of Lecithin and its Hydrolysis Products. III. Lecithin, Glycerophosphorylcholine, Phosphorylcholine, Phosphatidic Acids, Choline and Glycerol
Authors: Urakami Chieko , Kameyama Haru 
Published: July 2006

Abstract
Purified ovo-lecithin, Dl-α-glycerophos-phorylcholine, choline and glycerol were found to exhibit no antioxygenic property against carefully purified methyl oleate. Phosphorylcholine, its chloride and natural phosphatidic acids, on the other hand, showed activity.
The order of activity efficiency at 60°C was found to be orthophosphoric acid &gt; phosphatidic acid and phosphorylcholine &gt; phosphorylcholine chloride &gt; α-glycero-phosphoric acid &gt; β - glycerophosphoric acid. The discussion is presented to show that the phosphoryl moiety is predominantly responsible for antioxygenic activity.
Neutron Activation Analysis of Iodine in Silicon
Authors: Nozaki Tadashi , Baba Hideo , Araki Hidemaro 
Published: July 2006

Abstract
A trace quantity of iodine in silicon was determined by the neutron activation analysis. A chemical separation process, which involves potassium hydroxide fusion with potassium iodide as a carrier, was proved satisfactory by the use of 131I produced by the neutron irradiation of tellurium diffused in silicon. By this method, the iodine was converted into silver iodide ready for counting and weighing within an hour, with a yield exceeding 50%. When it is assumed that a counting rate of 100 cpm is enough for accurate detection of activities, the limit of detection is 0.002 μg. of iodine with a neutron flux of 6×1011n/cm2sec. and by the use of a 2π counter.
On The Mechanism of the Extraction of Uranyl Nitrate by TBP (Partition Study)
Authors: Naito Keiji 
Published: July 2006

Abstract
The method of analysis using the distribution coefficient to confirm the mechanism of extraction was proposed and the formation of the complex UO2(NO3)2·(TBP)2 and HNO3·TBP was confirmed. The extraction behavior of uranium from a nitric acid solution was concluded as a result of the competition of uranium and nitric acid. The thermochemical functions ΔH0, ΔF0 and ΔS0 for the complex formation reaction:
UO_2^+2(aq.)+2NO_3-(aq.)+2TBP(org.)=UO_2(NO_3)_2(TBP)_2(org.)
were determined roughly from the measurement of the distribution coefficient as follows: ΔH0(25°C) ≅−4.3 kcal., ΔF0 (25°C) ≅−2.0 kcal., ΔS0(∼25°C) ≅−7.7 e.u.
Relations between Electronic Absorption Spectra and Spatial Configurations of Conjugated Systems. V. Stilbene
Authors: Suzuki Hiroshi 
Published: July 2006

Abstract
(1) The quantitative relations between the degree of deviation from the coplanarity of the molecular configuration and the ultraviolet absorption spectrum as well as the quantities such as the extra-resonance energy and the π-bond orders have been determined for the stilbene-type compounds by calculations based on the simple LCAO molecular orbital method.
(2) The ultraviolet absorption spectra of trans-stilbene in the crystalline state, in the solution state, and in the vapor state have been discussed in reference to the spatial configurations of the molecule in the various states. The conjugation band in the vapor spectrum is at considerably shorter wavelengths than that in the solution spectra as well as the crystal spectra, a fact which has been considered as probably indicating that the most likely configuration of the molecule in the vapor state deviates considerably from coplanarity. The magnitude of the red-shift of the conjugation band in the crystal spectra measured by the pressed KCl-disk technique relative to the band in the spectrum of the n-heptane solution has been found to be smaller than the value anticipated for the rigid molecule. From this fact it has been inferred that the most probable configuration of trans-stilbene in solution does not significantly differ from the one in the crystalline state and is planar or nearly planar.
(3) On the basis of the above inference, the calculations have been applied to cis and trans-stilbenes, and the interplanar angles in the most probable configuration of cis-stilbene have been estimated at about 28° from the position of the conjugation band, in fairly good agreement with the value estimated from the scale model. The results of the calculations have been discussed.
(4) In addition, the solvent effects of various solvents on the spectra of trans-stilbene and its p-methoxy- and p-nitroderivatives have been discussed with special reference to the effect of benzene which has been found to cause a large bathochromic displacement of the conjugation band and a remarkable redistribution of intensity among the vibrational bands of the conjugation band of each compound.