bluuebunny/crossref_metadata_2025_split huggingface dataset:
EQUILIBRIA IN THE SYSTEMS CONTAINING WATER AND CHLORIDES OF IRON, COBALT AND NICKEL AT 25.0°
Authors: Osaka Yukichi , Yaginuma Tokuzo 
Published: July 2006

Abstract
The equilibria in the following systems at 25.0° have been studied:
1. FeCl3–CoCl2–H2O,
2. FeCl3–NiCl2–H2O,
3. CoCl2–NiCl2–H2O,
4. FeCl3–CoCl2–NiCl2–H2O,
and the results have been given in tables and digrams.
ELECTRODE POTENTIAL OF NICKEL. PART I. MEASUREMENTS IN AN ATMOSPHERE OF HYDROGEN WITH REDUCED NICKEL POWDER
Authors: Murata Kwanji 
Published: July 2006

Abstract
1. A reproducible electrode, which gives a constant and reversible potential of active nickel was obtained by using powdered nickel reduced with hydrogen directly in the cell and also using an apparatus which allows the cell to be filled with the electrolyte entirely in the absence of air.
2. The potentials of the reduced nickel powder in 0.05 M and 0.005 M nickel sulphate solutions both at 25°C. and 18°C. were measured in an atmosphere of hydrogen.
3. The normal electrode potentials of nickel were calculated from these observed potentials on the ground of two different concepts of the strong electrolytes, one being that the ion concentrations calculated from the conductance viscosity ratios are involved in the expression of the electromotive force of a concentration cell and the other being that the ion activities are involved. The average values of these normal electrode potentials are −0.2496 volt (25°C.) and −0.2508 volt (18°C.) at one molal ion concentration, and −0.2480 volt (25°C.) and −0.2492 volt (18°C.) at one molal ion activity.
4. The change in free energy of nickel electrode reaction per equivalent, that is, (Remark: Graphics omitted.) was calculated from the above electrode potentials.
A Thermistor Method for the Determination of Velocity Coefficients of Vinyl Polymerization. IV
Authors: Miyama Hajime 
Published: July 2006

Abstract
Concentration change of sensitizer during vinyl acetate polymerization photosensitized by 1, 1′-azo-biscyclohexanecarbon-itrile was measured with use of a spectro-photometer and the initiation velocity of polymerization was determined. Values of kp and kt at various degree of conversion were calculated from this value and the results of the previous paper. From this experiment, it was concluded that kp was nearly constant up to 40% conversion and as the conversion exceeded 40%, it decreased, while kt gradually decresed with the increase of the conversion.
Electron Diffraction Investigation on the Molecular Structures of Some Organosilicon Compounds. II
Authors: Yokoi Masatoki 
Published: July 2006

Abstract
The vapors of methyl or ethyl substituted silicon compounds containing Si–Cl, Si–Br, Si–O, Si–N and Si–S bonds were studied by electron diffraction method and their molecular structures were determined. Bond lengths obtained are summarized in Table IV. The Si-Br length in methylbromosi-lane series changes with the number of substitutions of Br, but the length is in accord with the data of corresponding bromosilanes. The valence angles of oxygen in linear and cyclic siloxanes were estimated to be about 140° and this value is nearly the same as that in α-quartz. The valence angles of silicon in cyclic compounds are almost tetrahedral and those of oxygen, nitrogen and sulfur vary with the size of the ring.
Structures of the Erdmann’s Salt, NH4[Co(NH3)2(NO2)4] and Some Other Related Nitro-ammine-cobalt (III) Complexes
Authors: Komiyama Yoshimichi 
Published: July 2006

Abstract
NH4[Co(NH3)2(NO2)4] belongs to the space group P212121, with four formula units per unit cell. All the atomic coordinates were determined by the method of two-dimensional Fourier series. The structure is found to be isotype to K[Co(NH3)2(NO2)4]. Two ammonia groups are co-ordinated to the central cobalt atom in the trans-positions.
General features of the structures of various nitro-ammine-cobalt(III) complexes were discussed. The absorption spectra of these complexes were reexamin-ed in their aqueous solutions. Results are briefly discussed in relation to their steric configurations.
The Molecular Structure of 1,2-Difluoro-1,1,2,2-tetrachloroethane
Authors: Iwasaki Machio , Nagase Shunji , Kojima Rimpei 
Published: July 2006

Abstract
The molecular structure of 1,2-difluorotetrachloroethane was studied by the electron diffraction method. The existence of the two isomeric forms, trans and gauche, was ascertained and the amount of the gauche form was found to be 55±10 per cent. This corresponds to the energy difference of 0−500 cal./mol. the trans form being more stable. The interatomic distances and the valency angles were determind as follows:
C—F=1.38±0.02 Å, C—Cl=1.76±0.01 Å, C—C=1.54±0.06 Å, &lt;CCCl=112°±2°, &lt;ClCCl=110°30′±1°, &lt;FCCl=107°30′±1°30′, and the azimuthal angle of the gauche form=59°±4°.
The C—F bond distance in this molecule is greater than those distances of compounds having more than one fluorine atom bonded with a carbon atom. On the other hand, the C—Cl bond distance seems to be slightly shorter than those of chloro-alkanes having no substituted fluorine atom.
Benzylation of Acetylene. I. Formation of 3,4-Diphenyl-1-butyne and 3,4-Diphenyl-1,2-butadiene
Authors: Ando Teisuke , Tokura Niichiro 
Published: July 2006

Abstract
The reaction between benzyl chlorides and metal acetylides, prepared from metallic lithium and sodium in liquid ammonia resulted in the formation of new compounds, i. e. 3,4-diphenyl-1-butyne and 3,4-diphenyl-1,2-butadiene. The benzylation of acetylene did not stop at benzylacetylene but another benzyl group was introduced to form 3,4-diphenyl-1-butyne. 3,4-Di-phenyl-1,2-butadiene was formed by the isomerisation of the butyne. This isomeri-sation occurred not only by the action of hot ethanolic potash but also in liquid ammonia at the room temperature. 3,4-Diphenyl-1,2-butadiene was readily polymerized by heat.
Synthetic Studies on the Benzofuran Derivatives. II. Reactions of Aromatic o-Hydroxyaldehyde Derivatives and Ethyl Bromomalonate
Authors: Matsumoto Takashi , Fukui Kenji 
Published: July 2006

Abstract
2-Carbethoxy-4-hydroxy-5-carbomethoxycoumarone (V) and 2,2-dicarbethoxy-3-hydroxy-6-benzyloxycoumaran (XII) were synthesized respectively from 2,6-dihydroxy-3-carbomethoxybenzaldehyde (IV) or 4-benzyloxy-2-hydroxybenzaldehyde (X) and ethyl bromomalonate by the method of Tanaka for benzofuran synthesis. 2-Carbethoxy-4-hydroxy-5-carbomethoxycoumarone (V) was hydrolysed to 4-hydroxycoumarone-2,5-dicarboxylic acid (VI).
This dibasic acid VI was decarboxylated in quinoline with copper powder into a mixture of karanjol (VIII) and karanjic acid (IX).
2,2-Dicarbethoxy-3-hydroxy-6-benzyloxy-coumaran (XII) was hydrolysed to 6-benzyloxycoumarone-2-carboxylic acid (XIII).
Structure of Reineckate Complex Ion
Authors: Takéuchi Yoshio , Saito Yoshihiko 
Published: July 2006

Abstract
The crystal structure analyses of Reinecke’s salt, pyridine reineckate and choline reineckate established the configuration and bond characters of the reineckate complex ion, [Cr(NCS)4(NH3)2]−.
The bond character of the complex ion in Reinecke’s salt and pyridine reineckate corresponds to the structure N≡C–S−, while in choline reineckate the bond character is acounted for by the structure N−=C=S. This mutation of the bond character is discussed together with crystal structures of these reineckates.
Ultraviolet Spectrophotometric Determination of Iron(III) as Chloro-complex
Authors: Ishibashi Masayoshi , Shigematsu Tsunenobu , Yamamoto Yuuroku , Tabushi Masayuki , Kitagawa Toyokichi 
Published: July 2006

Abstract
The absorption spectra have been investigated for the solution of ferric perchlorate at various concentrations of hydrochloric acid. A method for spectrophotometric determination of iron has been studied using hydrochloric acid as reagent. Effects of temperature, acidity and diverse ions have been examined and the iron content of iron-base alloys has been determined by differential method.
A Simple Method of Sulfate Microdetermination
Authors: Egami Fujio , Takahashi Noriko 
Published: July 2006

Abstract
1) A simple method for sulfate microdetermination was established. Sulfate is precipitated as barium sulfate; then the excess of barium is precipitated as barium chromate. Finally the excess of chromate is estimated in alkaline solution with a spectophotometer at 375 mμ.
2) This method is able to be applied to sulfate solution containing sulfate sulfur in the range 10–300γ. (30–900γ as SO42−)
3) This method was successfully applied to the estimation of inorganic sulfate such as that in rain water and organic sulfate such as chondroitinsulfate, charoninsulfate, ethyl sulfate and p-nitro-phenyl sulfate.
The Stretching Vibration of N-H Link of 2-Aminopyridine
Authors: Soda Reisuke 
Published: July 2006

Abstract
The infrared absorption spectrum of 2-aminopyidine was abserved and compared with those of other compounds and the amino from of 2-aminopyridine was confirmed. The imino from was rejected and even if this tautomeric from exists its quantity is estimated to be negligibly small.
Absorption Spectra of Heteropolyanions. II The Heteropolytungstates Containing Co(II), Co (III) or Mn(IV) as Central Ions
Authors: Shimura Yoichi , Tsuchida Ryutaro 
Published: July 2006

Abstract
The visible and ultraviolet absorption spectra have been measured for some heteropolytungstates containing cobalt (II), cobalt (III) or manganese (IV) as central ions.
It has been shown that some cobalt (II) or cobalt (III) ions in the heteropolytungstates have tetrahedral co-ordination. This is the first case of the absorption spectra of [CoII(O=)4]- and [CoIII(O=)4]-complexes being measured.
Dielectric Investigation on Coals. I. Dielectric Properties of Japanese Coals
Authors: Miyasita Isao , Higasi Keniti 
Published: July 2006

Abstract
In a wide frequency range covering 300 c/s to 50 Mc/s dielectric constant and loss factor of ten Japanese coals were measured at room temperature. The result provides a view that Japanese coals are almost non-polar in effect and embrace no units of graphite structure of the sort proposed by Ellis.
Dielectric Studies on Colloidal Solutions. IV. The Dielectric Constant of the Solutions of Long-chain Amine Hydrochlorides
Authors: Shirai Micho , Tamamushi Bun-ichi 
Published: July 2006

Abstract
The dielectric constant and the equivalent conductivity of solutions of hexadecyl and octadecylamine hydrochloride have been measured at the frequencies of 2 Mc./ sec. and 30 Mc./sec. The dielectric constant of the solutions shows a considerable increase beyond the concentration for micelle formation.
The dielectric constant and the equivalent conductivity of the solutions of these amine salts in aqueous ethanol of various concentrations have been measured. The rise of the dielectric constant is diminished with increasing concentration of ethanol.
The effect of solubilization of benzene on the dielectric constant of the solutions has been investigated. The relative increase in the dielectric constant is reduced with increasing amount of solubilized benzene.
From these experimental results, it is concluded that the rise of the dielectric constant of the aqueous solutions is mainly due to Debye-Falkenhagen’s effect.
Studies on the Chemical Constitution of Agar-agar. XIX. Pyruvic Acid as a Constituent of Agar-agar (Part 2). Isolation of a Pyruvic Acid-linking Disaccharide Derivative from the Methanolysis Products of Agar
Authors: Hirase Susumu 
Published: July 2006

Abstract
1. Partial methanolysis of agar has led to isolation of a crystalline double barium salt, which is separable into its components, barium methylsulfate and a barium salt of an organic acid.
2. From the last salt above mentioned, there has been obtained a free acid having the formula C14H21O9(OCH3)2COOH as its crystalline monohydrates. Its methyl ester and amide have also been prepared in a crystalline condition.
3. The acid obtained, a new compound, has been proved to be a disaccharide derivative composed of 3,6-anhydro-l-galactose, d-galactose and pyruvic acid.
4. It has also been proved that the pyruvic acid residue is linked through its carbonyl group with the d-galactose residue.
5. The isolation of the pyruvic acidlinking disaccharide derivative substantiates the view that pyruvic acid is an intrinsic constituent of agar.
Synthesis of β- and γ-Thujaplicins
Authors: Katsura Shigeo , Moroe Tatsuo , Ikegami Norio 
Published: July 2006

Abstract
β- and γ-Thujaplicins were synthesized through 4-isopropylcycloheptanone from perillaldehyde and 4-isopropylcyclo-hexanone.
Hydrogen Bonding Effect on the Fluorescence of π-Electron System. III. Fluorescence Quenching of Some Nitrogen Heterocycles Caused by Hydrogen Bond Formation
Authors: Mataga Noboru , Tsuno Shizuyo 
Published: July 2006

Abstract
1. Hydrogen bonding effect on the fluorescence of acridine, 3,6-diaminoacridine and 3,6-bisdimethylaminoacridine was studied in non-polar solvent added with proton donors such as phenol, naphthols, aniline and pyrrole.
2. Their fluorescence yields are decreased when hydrogen bonded with these proton donors, in which the hydrogen bond is capable of conjugation with π-electron system, in contrast to the case of donors such as benzylalcohol and β-phenylethylalcohol in which the hydrogen bond is isolated by σ-bond from π-electron system, and hydrogen bonding with which leads to the enhancement of fluorescence yield.
3. No viscosity dependence of quenching has been observed. From this fact participation of diffussion controlled dynamical process in the non-radiative degradation of excited state is unlikely.
4. The cause of non-radiative degradation of excited state by hydrogen bonding was ascribed to the delocalization of π-electrons through the hydrogen bond, especially in the excited state.
Studies on the Mechanism of Eder’s Reaction. II. On the Properties of the Active Oxalic Acid in Manganese (III and VII)-Oxalate Reaction Systems
Authors: Sakuraba Shukichi , Ikeya Syozo 
Published: July 2006

Abstract
1) The active oxalic acid produced in the manganese (III or VII)-oxalate reaction system has the same properties with the activiated manganese oxalate formed by ultraviolet irradiation. These active intermediates are able to reduce mercury (II) chloride and, if oxygen is dissolved in the solution, react with oxygen to form hydrogen peroxide and the manganese (III) ion. These will probably be an ionic radical with a long life that has the same formula.
2) The inhibitory action of oxygen on the decomposition of the manganese (III) oxalate complex can be interpreted by the reproduction of the manganese (III) ion, and it is most remarkable at pH about 3.2.
Further Studies on the Preparation of Calf Thymus Histone
Authors: Ui Nobuo 
Published: July 2006

Abstract
Calf thymus histone was prepared as gently as possible without using acids, alkalis or organic solvents. It was clearly shown that two components with sedimentation coefficients of 2 S and 0.7 S are present.
Sedimentation, electrophoresis and solubility behaviors of these preparations were similar to those of the preparations obtained by the previously reported method using acid and ethanol, and it was confirmed that histone consists of two fractions, histones I and II. It was also ascertained that acid as well as ethanol causes no alteration of the proteins.
Spectrophotometric Method for the Determination of Small Amounts of Sulfate Ions
Authors: Iwasaki Iwaji , Utsumi Satori , Hagino Ken , Tarutani Toshikazu , Ozawa Takejiro 
Published: July 2006

Abstract
The authors have devised a new method for the determination of small amounts of sulfate. Sulfate is precipitated as barium sulfate using barium chromate suspension in an acid solution (0.5 M acetic, 0.01 M hydrochloric acid), and the excess of barium is almost completely precipitated as barium chromate by adding ammonia water (containing calcium ion) and ethanol. Finally the amount of chromate which is exchanged with sulfate is estimated.
The proposed method may be applicable to the determination of 0.3–100p. p.m. sulfate with satisfactory results.
Dye-sensitized Photopolymerization of Acrylonitrile-Vinyl Acetate Copolymers
Authors: Taniyama Masakazu , Oster Gerald 
Published: July 2006

Abstract
Copolymers of acrylonitrile and vinyl acetate have been produced using a dye-reducing agent combination as the photo sensitizer. Visible light was employed as the radiation source. Nitrogen analyses were performed on the polymers obtained. The copolymerization ratio were 3.88 and 0.009 for acrylonitrile and vinyl acetate, respectively. Below an initial monomer molar ratio of acrylonitrile of 0.3, the resultant copoly-mer dissolves in acetone.
Molecular Rotations of Glucides in Relation to their Structures. IV. The Internal Conformation of C6–O Bond in d-Mannopyranose and d-Glucopyranose in their Aqueous Solutions
Authors: Yamana Shukichi 
Published: July 2006

Abstract
The internal conformation of C6–O bond in the molecules of d-mannopyranose and d-glucopyranose in aqueous solutions were presumed by a new method, and was concluded to take trans (mostly) and gauche II (only sometimes) forms.
Absorption Spectra and Chemical Behavior of the Hexahydroxylamine Cobalt (III) Complex
Authors: Yoneda Hayami 
Published: July 2006

Abstract
The absorption spectrum of hexahydroxylamine cobalt(III) complex was measured and compared with the hitherto obtained data of the other hexammine cobalt (III) complexes. The frequencies of the first and second absorption bands of this complex were 68.5×1013 and ca. 94×1013 sec.−1 respectively. These values are much greater than those found in other hexammine cobalt (III) complexes, and this fact may indicate the strong interaction between the central cobalt (III) ion and nitrogen atoms of the co-ordinating hydroxylamine. In addition to the study of absorption spectra, the rate of decomposition of this complex was measured. The rate of decomposition was proportional to the concentration of the hydroxyl ion, and the activation energy was 32.5 kcal. mole−1. In order to explain the above results, the following equilibrium, assuming the proton dissociation, was proposed;
[Co(NH_2OH)_6]^3++H_2O\ightleftarrows[Co(NH_2OH)_5NHOH]^2++H^3O^+
Heat of Mixing of Mono- and Di-propylene Glycol with Water
Authors: Amaya Kazuo , Fujishiro Ryoichi 
Published: July 2006

Abstract
The heat of mixing of propylene glycol and di-propylene glycol with water was measured. The results obtained for these systems were compared with each other and it was found that the oxygen atom in the ether bond of di-propylene glycol plays an important role for the acceptor of hydrogen bonding and makes a great contribution to the heat of mixing.
The Photochemical Degradation of 6 Nylon. I
Authors: Hashimoto Takeshi 
Published: July 2006

Abstract
1) The photochemical degradation of 6 nylon was investigated through the measurement of intrinsic viscosity and the amount of water-soluble material of 6 nylon taffeta irradiated for various periods of time in Fade-Ometer.
2) The intrinsic viscosity or the number-average degree of polymerization decreases rapidly at the initial stage, while the amount of water-soluble material increases approximately in proportion to the exposure time.
3) It is deduced from the relationship between the number-average degree of polymerization and the amount of water-soluble material that the molecular chain of 6 nylon is randomly split off by light. The relationship is well explained by the theory of random breaking of the polymer chain.
Spectrophotometric Determination of Iron in Serum
Authors: Umemoto Shunji , Yamamoto Yasuhisa 
Published: July 2006

Abstract
To improve the procedure of photometric determination of iron in human serum, Torii’s method recently proposed for the determination of iron was applied to serum. After the removal of protein from serum, the iron in serum is reduced, the pH of the solution is adjusted to 4.5, the color-developing reagent is added, and the excess of the reagent is removed by extraction with carbon tetrachloride. The green solution thus obtained is effective for spectrophotometric determination.
The interference of copper is avoided by the addition of thiosulfate, and the substances other than copper remaining after the removal of protein from serum do not give any appreciable interference.
Synthesis of 2-Alkyl-4H,1,3-benzoxazine-4-ones
Authors: Hanada Takeyosi 
Published: July 2006

Abstract
2-Alkyl-4H,1,3-benzoxazine-4-ones (Ia, Ib, and Ic) were synthesized from the corresponding O-acylsalicylamides (II), and some of the properties of I were studied.
Electron Diffraction Investigation on the Molecular Structure of 1,1,2,2-Tetrafluoro-1,2-dichloroethane
Authors: Iwasaki Machio 
Published: July 2006

Abstract
The molecular structure of 1,1,2,2-tetrafluoro-1,2-dichloroethane was investigated by means of the sector-microphotometer method of electron diffraction. The existence of two isomeric forms, i. e., trans and gauche, was confirmed, and the amount of the gauche form was found to be 48±5 per cent. at 10°C. This corresponds to the energy difference of 440±110 cal./mol., the trans form being more stable than the gauche form. The interatomic distances and the bond angles were determined as follows: & C–F=1.33_0±0.01_5Å ∠CCF=108°±1°30’
& C–C=1.54±0.04Å ∠CCCl=112°±1°30’
& C–Cl=1.74_5±0.01_5Å ∠FCCl=110°±1° \oindentand the azimuthal angle of the gauche form=62.5°±3°.
Mutual Solubilities of Some Hydrocarbon Oils and Liquid Ammonia. II. Application of the Solubility Parameter Theory
Authors: Ishida Kiyoharu 
Published: July 2006

Abstract
The result of the comparison of experimental data for the critical compositions and the logarithms of activity coefficients at infinite dilution for binary systems of some hydrocarbon oils and liquid ammonia with those expected from the solubility parameter theory, is that the solubility relations may be more satisfactorily interpreted by the theory by assuming that ammonia is associated nearly to dimerized from in the liquid state.
Isotopic Exchange Reaction between Cyclohexane and Deuterium on Evaporated Molybdenum Films
Authors: Hayakawa Teruo , Sugiura Toshio 
Published: July 2006

Abstract
Isotopic exchange reaction between cyclohexane and deuterium over evaporated molybdenum films has been studied mass-spectrometrically at the temperature range 56-111°C. The present results were compared either with Anderson and Kem-ball’s or Burwell and Tuxworth’s, and summarized as follows;
1) Since the deuterium content in our experiments was considerably low the production of considerable amounts of highly deuterated products requires a process of multiple exchange.
2) The present results clearly indicate that one can observe no discontinuities which separate the concentrations of C6H6D6 and C6H5D7.
3) The pressure-dependence was studied for this exchange and the initial rate (k) was found to be expressed as k∞p (C6H12)1.0·p (deuterated hydrogen)−0.6.
4) According to the present kinetic evidence, the rate-determining step of this exchange is probably the desorption of the cyclohexyl radicals.
5) So far as the present experiments were concerned, it seems reasonable to consider that the deuterium isotope effect gives no significant influence upon the present exchange reaction.