bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tensammetric Study of the Adsorption of Brucine
Authors: Kodama Mutsuo , Murata Mitsuko , Noda Tomohiko , Kimura Akiko 
Published: July 2006

Abstract
This paper will present two results of experiments concerning the adsorption of brucine. We will first discuss the adsorption of brucine on D. M. E. studied tensammetrically. Brucine was found to give a tensammetric wave with two peaks, at +0.10 V and −1.15 V vs. SCE. The positive tensammetric peak can be ascribed to the usual adsorption process. The second peak, however, behaved differently from the first, probably due to the reformation of adsorbed brucine film involving the protonation and the reorientation of brucine. Secondly, we will present experimental facts concerning the depressive effects of brucine on the reduction waves of copper(II).
The Kinetics of Substitution Reactions Involving Metal Complexes. XII. The Reactions between Copper(II) Ions and Zinc(II)-nitrilotriacetate Complexes
Authors: Tanaka Nobuyuki , Kimura Masaru 
Published: July 2006

Abstract
The kinetic study of the substitution reaction of copper(II) ions and zinc(II)-nitrilotriacetate complexes in acetate buffer solutions has been carried out with the same procedure as reported previously. The reaction was treated as to proceed through both hydrated metal ions and monoacetato complexes. The rate constants for eight elementary reaction paths, of which four involve the hydrated copper(II) ions and the others the monoacetatocopper(II) complexes, were determined at ionic strength 0.23 at 0°C. The values obtained indicate that all the reactions proceeding through hydrated copper(II) ions are faster than the corresponding reactions proceeding through monoacetatocopper(II) complexes.
A.C. Polarographic Determination of Lanthanum(III), Nickel(II), Calcium(II), and Magnesium(II) by Using Diethylenetriaminepentaacetic Acid as a Titrant
Authors: Kodama Mutsuo , Murata Mitsuko 
Published: July 2006

Abstract
The a.c. polarographic determination of lanthanum(III), nickel(II), calcium (II), and magnesium(II) with diethylenetriaminepentaacetic acid was studied by using a dropping mercury electrode and a hanging mercury drop electrode as indicator electrodes. Lanthanum(III) and nickel(II) in an acetate buffer solution and calcium(II) and magnesium(II) in an ammonia buffer solution could be titrated with diethylenetriaminepentaacetic acid in the concentration range from 5×10−5 to 1×10−3 m by measuring the height of the a.c. polarographic wave of diethylenetriaminepentaacetic acid after the end point. The effect of the presence of calcium-(II) ions on the a.c. polarographic determination of lanthanum(III) in an acetate buffer solution of pH 4.0 was also examined and discussed thermodynamically.
Formation Constants of Chromium(III) Complexes with (N, N)-, (O, O)- and (N, O)-Type Ligands, and Their Relationship to Structure
Authors: Takata Shichiro , Kyuno Eishin , Tsuchiya Ryokichi 
Published: July 2006

Abstract
Formation constants of chromium(III) complexes with β-alanine, anthranilic acid, picolinic acid and 8-hydroxyquinoline, being all (N, O)-type bidentate chelate ligands, were determined by the pH method at an ionic strength μ=0.1, and at 25°C. The formation constants are log k1=9.69 for β-alanine, log k1=4.35 and log k2=3.67 for anthranilic acid, log k1=4.76, log k2=4.38 and log k3=4.55 for picolinic acid and log k2=9.76 and log k2=8.48 for 8-hydroxyquinoline, respectively. The relationships between the formation constants of the complexes and the acid dissociation constants of the chelate ligands were discussed, including those for glycine and α-alanine complexes, and those, in addition, for the complexes with several (N, N)- and (O, O)-type ligands reported in a preceding paper.
Infrared-spectral Studies on the Orientation of the Lone Pairs in Piperidine Derivatives
Authors: Masamune Tadashi , Takasugi Mitsuo , Matsuki Minoru 
Published: July 2006

Abstract
The infrared spectra of stereoisomers of several piperidines and their N-methyl derivatives in carbon tetrachloride have been measured in the region of 3020 to 2500 cm−1. The estimated intensities (A) of their Bohlmann bands have been analyzed, provided that Formula (1) concerning the intensity defined in the text holds for the compounds examined. The result indicates that piperidine exists mainly, but not exclusively, in the conformation with the lone pair axial.
Acetonated Sorbofuranoses and Their Favored Conformations as Determined by Proton Magnetic Resonance Spectroscopy
Authors: Maeda Takashi , Tori Kazuo , Satoh Shiroh , Tokuyama Kanji 
Published: July 2006

Abstract
A series of l-sorbofuranose derivatives have been studied by PMR spectroscopy in order to determine their favored conformations from the coupling constants obtained by applying the spin-decoupling techniques and the solvent effects of benzene at 100 MHz. The coupling constants J3,4, have disclosed that the furanose ring of methyl 1,3,4,6-tetra-O-acetyl-α-l-sorbofuranoside (IIa) in solutions has a conformation close to a C3-endo-C4-exo half-chair, while that of its β-anomer (IVa) has a C3-exo-C4-endo half-chair conformation. Their conformations are unchanged over the temperature range of 32–74°C, but they are affected by the introduction of a 4,6-O-or 2,3-O-isopropylidene group, either of which locks the furanose ring to a C3-exo-C4-endo half-chair conformation. This effect is thought to play an important role in the exclusive formation of 2,3:4,6-di-O-isopropylidene-α-l-sorbofuranose (XII) during the acetonation of l-sorbose.
The Nephelauxetic Effect in Praseodymium(III) and Neodymium(III) Complexes
Authors: Misumi Seizo , Kida Sigeo , Isobe Toshiyuki , Inazumi Akio 
Published: July 2006

Abstract
The absorption spectra of praseodymium(III) and neodymium(III) complexes were measured in an aqueous alkaline solution with an excess of ligands. The experimental data being used, the Racah parameter, E3, and the Landè parameter, ζ4f, were calculated by the least-squares method on the assumption that the energy separation between J-levels of the 4fn-configuration is a function of E3 and ζ4f. The nephelauxetic effect in the Pr(III) and the Nd(III) complexes was then discussed by using the values of E3 thus obtained.
The Ultraviolet Absorption Spectrum of Quinazoline Vapor Due to the n–π* Transition
Authors: Hasegawa Yoshinori , Amako Yoshito , Azumi Hiroshi 
Published: July 2006

Abstract
The ultraviolet absorption spectrum of quinazoline vapor due to the n–π* transition was photographed and analysed. The lowest n–π* transition has its origin at 27581 cm−1, and consists of two strong and prominent progressions, 515 and 784 cm−1. The vibrational analysis of the strong bands is reported on.
Mass Spectrometry of Organometallics. I. Titanium Cyclopentadieny Complexes
Authors: Takegami Yoshinobu , Ueno Toru , Suzuki Toshimitsu , Fuchizaki Yuichi 
Published: July 2006

Abstract
The possibility of mass spectral analysis of less volatile and air sensitive organometallic compunds has been studied with an electron-impact, Muttauch-type mass spectrograph. Several organotitanium compounds, (C5H5)2Ti, (C5H5)2Ti-methylacetylene complex, (C5H5)2Ti-allylchlorideand (C5H5)2TiCl2-AlEt2Cl complex, have been subjected to mass spectral analysis, and the parent ion has been detected for each compound. The (C5H5)2Ti-methylacetylene complex gave a parent ion of (C5H5)2Ti(C3H4)2+; NMR and IR suggested the structure as a five-membered cyclic diene complex of (C5H5)2Ti. The (C5H5)2Ti-allylchloride gave a parent ion of (C5H5)2-Ti(C3H5)+ which proves the existence of allyl complex of (C5H5)2Ti. The (C5H5)2TiCl2-AlEt2Cl complex gave a parent ion of (C5H5)2TiCl2AlEtCl+ which is in agreement with the composition reported in the literature.
Studies of the Behavior of Trivalent Uranium in an Aqueous Solution. II. Absorption Spectra and Ion Exchange Behavior in Various Acid Solutions
Authors: Satô Akiko , Suzuki Shin 
Published: July 2006

Abstract
The absorption spectra of trivalent uranium in hydrochloric, sulfuric and perchloric acid solutions were investigated. It was found that there is a possibility of the formation of a chloro-complex from the fact that a large change in absorption spectra was observed at high concentrations of chloride ion. On the basis of the above facts, the behavior of trivalent uranium in those media toward ion exchange resin was studied. It was considered that an anionic complex of trivalent uranium begins to form at concentrations of hydrochloric acid above 7 n, which shows good agreement with results obtained on trivalent ions of plutonium, americium and curium, which are similar actinide elements. However, it was not possible to confirm the existence of a soluble carbonate complex of trivalent uranium, as in the case of trivalent plutonium or americium.
Studies on Adduct Formation of β-Diketone Chelates with Heterocyclic Bases
Authors: Shigematsu Tsunenobu , Tabushi Masayuki , Matsui Masakazu , Munakata Megumu 
Published: July 2006

Abstract
Stability constants of the 1:1-adducts with heterocyclic Lewis bases on copper chelates of six β-diketones and two ethylesters of β-ketoacids (Cu(ligand)2·base) were determined by spectrophotometric measurements in visible region and the effects of β-diketone substituents, Lewis bases and organic solvents on the stability constants were studied. Terminal alkyl groups of β-diketones hardly hindered the adduct formation, because the adducts of β-diketone chelates except acetylacetone chelate had similar stability constants. Solvent effect was due to the formation of the solvates of the chelates or the solvation of N-base with solvent. This is related to the abnormal position of chloroform in the order of the adduct stability compared with oxygencontaining solvents. Infrared spectra indicate that the metal-oxygen bonding, as well as the basicity of Lewis bases is considered as an essential factor in the adduct formation of metal β-diketone chelates.
Free Radical Reactions in Organic Electrode Processes. V. Anodic Cyanation of Some Monosubstituted Benzenes
Authors: Susuki Tosaku , Koyama Kikuhiko , Omori Akira , Tsutsumi Shigeru 
Published: July 2006

Abstract
The anodic reaction between cyanide ions and monosubstituted benzenes in methanol has been investigated. An examination of the products has indicated that the reaction proceeded by means of the formation of nucleus-cyanated products. The solvent perhaps also participates concurrently in this anodic reaction leading to the formation of methoxylated compounds. The results offer a striking contrast in isomer distribution between these two substitutions. The substituents on the benzene rings had a pronounced effect on the yield of the cyano compounds. The reactivity of the aromatic compounds toward the anodic cyanation decreased in the following order:
anisole &gt;&gt; toluene &gt; ethylbenzene &gt; cumene &gt;&gt; benzene &gt;&gt; methyl benzoate.
These results have been interpreted as resulting from the generation of an aromatic ion radical at an anode by the loss of a π-electron from each molecule.
The Syntheses of Dimethylfuro Derivatives of 4-Hydroxycoumarins and Benzofuro[1]benzopyranones
Authors: Kawase Yoshiyuki , Nanbu Mutsumu , Miyoshi Fumihisa , Kawamura Hiroshi 
Published: July 2006

Abstract
4′,5′-Dimethyl-4-hydroxyfuro[2′,3′:7,8]coumarin (2) and its 3-phenyl, 3-(2-methoxyphenyl), and 3-(2,4,5-trimethoxyphenyl) derivatives (4, 5 and 6), and also their isomers, 4′,5′-dimethyl-4-hydroxyfuro[3′,2′:6,7]coumarins (14, 15, 16 and 17), were prepared by the action of ethyl carbonate or of ethyl chlorocarbonate on the corresponding 2,3-dimethyl-4- or isomeric 6-hydroxy5-benzofuranyl ketones. Two furocoumarins (2 and 14) were also obtained in poor yields by the condesnation of 2,3-dimethyl-4- or 6-hydroxybenzofuran with malonic acid. The action of hydroiodic acid on the furocoumarins 5 and 6 afforded 2,3-dimethyl-5H-benzofuro[3,2-c]furo[2,3-h][1]benzopyran-5-one (8) and its 7,8-dihydroxy derivative (9) respectively; 8 was also synthesized by building up the dimethylfuran ring on 3-hydroxy-6H-benzofuro[3,2-c][1]benzopyran-6-one, while 9 was also synthesized by the oxidative coupling of 2 with catechol. On the other hand, the action of pyridine hydrochloride on 5 caused the closure of the furan ring towards the 2-position, giving l,2-dimethyl-6H-benzofuro[2,3-b]furo[2,3-h][1]benzopyran-6-one (11), which had a new pentacylic ring system; the only demethylated compound (12) was also obtained. The structure of 11 was confirmed by its IR and UV spectra and by the formation of 12 upon its alkaline hydrolysis. The action of aluminum chloride on 5 also gave 12. Analogously, isomeric l,2-dimethyl-6H-benzofuro[3,2-c]furo[3,2-g][1]benzopyran-6-one (20) and its 8,9-dihydroxy compound (21) were also synthesized.
Sur la Structure des Dimères du N-Phényl Acétone-d-glycéraldimine
Authors: Funabashi Masuo , Yoshimura Juji 
Published: July 2006

Abstract
N-phényl acétone-d-glycéraldimine dimérise facilement en présence d’un soupçon de l’acide acétique et donne deux dimères, dont la structure y comprise la configuration absolue partielle a été etablie par l’analyse spectrométrique et la décomposition chimique comme étant un 4-anilino-2-(2′,2′-diméthyl-1′,3′-dioxolanne-4′-yl)-1,2,3,4-tétrahydroquinoléine-3-spiro-4″-(2″,2″-diméthyl-1″,3″)dioxolanne. Lorsqu’on hydrolyse ces dimères partiellement avec l’acide acètique aqueux á 70%, on peut isoler 1,2,3,4,5,6-héxahydro-4-hydroxy-1,5-méthano-2,6-benzoxazocine-11-spiro-4′-(2′,2′-dimethyl-1′,3′)dioxolanne avec un rendement d’environ 40% et enmême temps l’aniline est detaché. Néanmoins, le dérivé N-acétyle d’un dimère n’a pas détaché l’aniline á la même condition d’hydrolyse.
Gel Filtration of Mixtures of Surfactants on Sephadex
Authors: Tokiwa Fumikatsu , Ohki Kenji , Kokubo Isao 
Published: July 2006

Abstract
The gel filtrations of mixtures of sodium dodecyl sulfate (SDS) and sodium tetradecyl sulfate (STS) have been studied for different mole ratios of STS/SDS with varying total concentrations. Above the critical micelle concentration (CMC) of the mixture, two retention volumes V1obs and V2obs were obtained from the elution curve, and the difference between V1obs and V2obs depends on the total concentrations of the mixture. The initial part of the effluent contains only STS, which means that the separation of STS from the mixture occurs after passing through the column. These results have been discussed by taking into consideration the equilibrium between monomers and micelles for the mixtures of the two surfactants. It is shown that the separation factor is determined by the CMC values of the two surfactants—the greater the ratio CMCA/CMCB (CMCA&gt;CMCB), the greater the degree of separation.
ESR and Optical Studies of the Reaction Intermediates Produced from Phenyl Halides by Dissociative Electron Attachment in γ-Irradiated Organic Glasses at 77°K
Authors: Noda Syozi , Fueki Kenji , Kuri Zen-ichiro 
Published: July 2006

Abstract
ESR and optical studies have been made of dissociative electron attachment by phenyl halides and reaction intermediates produced in γ-irradiated glassy solid matrices at 77°K. Dissociative electron attachment by phenyl halides is an efficient process and the ratio of cross sections C6H5I/C6H5Br/C6H5Cl for this process in MTHF glass is 1.5/1.0/1.0. The phenyl radical produced abstracts a hydrogen atom from solvents (MTHF, 3MP) at 77°K and is stable in aqueous alkali-metal hydroxide glass. A part of 3MP radicals in a γ-irradiated solution of phenyl bromide in 3MP at 77°K disappear by a first-order process for which k=4.3×10−2 min−1. γ-Irradiated 3MP glasses containing phenyl halides exhibit the optical absorption spectra having characteristic absorption bands in the visible and UV region which are assigned to solute cations and hydrogen-adducts respectively.
Infrared and Raman Spectra of 2, 3-Dichloro-2, 3-dimethylbutane
Authors: Koide Tsutomu , Oda Tsutomu , Ezumi Kiyoshi , Iwatani Koji , Kubota Tanekazu 
Published: July 2006

Abstract
Infrared spectra of Cl(CH3)2C–C(CH3)2Cl were obtained over the region from 400 cm−1 to 4000 cm−1 at room temperature in the gas phase, dilute solutions, and KBr-disk. In the KBr-disk case, spectra were also obtained at lower temperatures. In the gas phase, and in the disk at lower temperatures, spectral simplifications were obtained. Raman spectra at room temperature were photographed for the crystalline sample, and also for 17–25% solutions in several solvents. The coexistence of trans-gauche isomers in the high-temperature solid phase of this compound was verified by spectral comparison between trans- and gauche-isomers. The energy difference between two isomers was estimated to be about 1.5 kcal/mol from temperature changes in the infrared intensities.
Thermal Properties of Alkali Halide Crystals with the CsCl-type Structure. I. Construction of a Calorimeter for the Temperature Region 1–20°K and Heat Capacities of Caesium Bromide and Caesium Iodide between 1.5 and 300°K
Authors: Sorai Michio , Suga Hiroshi , Seki Syûzô 
Published: July 2006

Abstract
An adiabatic low-temperature calorimeter, capable of measuring the heat capacities of solid or liquid between 1.4 and 21.0°K, was constructed. A mechanical thermal switch is used for cooling the sample cell, the temperature of which is measured with a doped germanium thermometer. The resistance-temperature calibration data for the resistor was fitted to a function of the form log10R=A⁄T+B+CT+DT2. By using this formula the thermodynamic temperature scale is represented to within ±0.02°K and by combining the correction curves the final deviations of the calibration data from the thermodynamic temperature scale were within ±0.003°K in the whole temperature range investigated. The heat capacity measurements of CsBr and CsI crystals were made with two kinds of adiabatic calorimeter assemblies, one for the temperature range 1.4 to 21°K and the other for the range 12 to 300°K. Values of the heat capacity Cp°, entropy S°, enthalpy function (H°−H0°)/T, and Gibbs energy function −(G°−H0°)/T at 298.15°K are: 12.441, 26.785, 10.415, and 16.370 for CsBr and 12.571, 29.127, 10.788, and 18.339 for CsI, respectively, in cal·mol−1.°K−1.
An Internal-Monitor Method for the Activation Analysis of Silver in Palladium with Thermal Neutrons
Authors: Oka Yoshinaga , Kato Toyoaki , Tsai Hui-Tuh , Nomura Koichi 
Published: July 2006

Abstract
An internal-monitor method has been developed to eliminate many of the errors probable with activation analysis. This method involves the measurement of the composed radioactivity of the species to be analyzed and of an appropriate internal-monitor, and the estimation of the ratio of the induced activity of both the species. The present report will describe the principles and the applicability of the method to the determination of a trace amount of silver in palladium by means of thermal neutron irradiation. After the silver activity is chemically separated from the irradiated sample, the γ-ray spectrum corresponding to the mixture of 110mAg and 111Ag formed by the β− decay of 111Pd is measured. Synthetic mixtures of silver and palladium with known weight ratios have been prepared to check the accuracy of the method. A good proportionality has been obtained between the ratios of the 110mAg to 111Ag activities and the ratios of the concentrations. By using this relationship, silver analysis can easily be achieved. Contents of silver in a palladium sample down to about 1 ppm can be determined with a relative error of within ± 2%. By this method the errors which arise from neutron flux irregularities and self-shielding effects can be avoided, and no correction for chemical yield is necessary.
Electronic Absorption and Emission Spectra of 9, 10-Dichloroanthracene and 9, 10-Dibromoanthracene Crystals
Authors: Tanaka Jiro , Shibata Masao 
Published: July 2006

Abstract
The electronic absorption spectra of three crystalline modifications of anthracene derivatives have been measured; they are the α and β form of 9, 10-dichloroanthracene and 9, 10-dibromo-anthracene. The assignment has been presented for each absorption band. The charge transfer absorption which is regarded to the transition between two stacked molecules has been observed in the α-form of 9, 10-dichloroanthracene; also a Rydberg type transition which has an out of plane polarization is found in this crystal starting at 290 mμ. It is unusually broad and is regarded as a band to band transition. The emission band has been measured at different temperature; it is found that excimer type emission is most prominent in the β-form of 9, 10-dichloroanthracene, in which intermolecular approach in the excited state will occur with less difficulty. A criterion for strong, medium, and weak interactions in the excited state is presented by comparing the shift, and the shape of the emission band with the intermolecular vibrational spacing. These results show that the charge transfer interaction and excimer formation are greatly dependent on the relative orientation of molecules, the π-electron overlap, and the difficulty of intermolecular approach in the excited state, particularly with its correlation to the steric repulsion of the bulky substituent groups.
A Study on the Yield of (γ, p) Reactions with 20 MeV Bremsstrahlung
Authors: Oka Yoshinaga , Kato Toyoaki , Nomura Koichi , Saito Tatsuya , Tsai Hui-Tuh 
Published: July 2006

Abstract
The yields of the (γ, p) reactions on 13 elements up to an atomic number of 80, irradiated with 20 MeV bremsstrahlung, have been given through the γ-ray spectrometric measurements of the resultant activities. The yield values, as measured in absolute disintegration rates at the end of irradiation per mole per roentgen, have been plotted against atomic number of the target nuclides. The shape of the yield curve thus obtained is similar to that of the curve for the photo-proton yield as a function of atomic number. The yield values are 105 order of magnitude in the lower-Z region, and drop rapidly with increasing atomic number up to a Z of 50. For barium and mercury targets, a yield value of 2.2×104 was obtained. Neutron excess nuclides were found to be restrictive to the (γ, p) processes. The present results permit a study of general behavior of the (γ,p) reaction yields as well as of the applicabilities of the resultant activities to photoactivation analyses for many elements distributed throughout the periodic table.
Dimerization of Acrylonitrile by Ruthenium Chloride
Authors: Misono Akira , Uchida Yasuzo , Hidai Masanobu , Shinohara Hiroyuki , Watanabe Yoshihisa 
Published: July 2006

Abstract
The end-to-end dimerization of acrylonitrile was effected with a ruthenium trichloride trihydrate catalyst under a hydrogen atmosphere, thus obtaining a mixture of cis- and trans-1, 4-dicyano-1-butene as the main products. Under nitrogen, however, only very small amounts of these products were formed. The reaction occurred at temperatures of 120–200°C under moderate hydrogen pressures in alcoholic media such as ethanol. The effects of various salts or electron-donating compounds on the catalysis were examined.
Synthesis of Trimethylhydroquinone from p-Xylene
Authors: Sato Kikumasa , Fujima Yoshito , Yamada Arihiro 
Published: July 2006

Abstract
The synthesis of trimethylhydroquinone from p-xylene was carried out via two routes; one includes the formylation of p-xylene, followed by nitration, and the other, the chloromethylation of nitro-p-xylene. The oxidation of the trimethylanilines, VI and IX, prepared from 2,5-dimethyl-6-nitrobenzaldehyde and 2,5-dimethyl-3-chloromethylnitrobenzene and their subsequent reduction gave trimethylhydroquinone (TMH) in appreciable yields.