bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Infrared Absorption Spectra of the Condensation Products of Formaldehyde with Hydrazine
Authors: Mashima Mitsuo 
Published: July 2006

Abstract
The infrared absorption spectra of tetraformaltrisazine and formalazine have been obtained in the solid state. From a tentative assignment of the bands observed, it has been shown that a molecule of tetraformaltrisazine has the bicyclic structure proposed by Hofmann and Storm, while formalazine is a polymer with a four-membered heterocyclic ring.
The Temperature Dependence of the Radio-Frequency Polarographic Wave Height
Authors: Kambara Tomihito , Watarai Shogo 
Published: July 2006

Abstract
When the radio-frequency polarographic current, iRF, is regarded approximately as the difference between the Fournier current and the ordinary DC polarographic current, iDC, one can elucidate the temperature dependence of iRF. It may be theoretically predicted that the relative temperature coefficient of iRF for the completely-reversible system is less by 0.66% than that of iDC. The plot of log(iRF·T2) against 1/T, where T is the absolute temperature, gives two straight lines which join each other at a knick, coresponding to the transition from a completly reversible process to a less reversible one. Experiments with thallium(I) and zinc(II) ions in various supporting electrolytes reveal the essential validity of the present theory.
Phenazine Complexes. Their Preparation and Their Electrical Conductivity
Authors: Inoue Hiroo , Tamaki Kentaro , Kida Yoshihiro , Imoto Eiji 
Published: July 2006

Abstract
The photo-reduction of phenazine was carried out in isopropyl alcohol in the presence of ferric chloride or stannic chloride. In the course of the photo-reduction, a metal chelate precipitated. The metal chelate was composed of unstable black needle crystals; it was presumed, from the results of the elementary analysis, the visible and the infrared absorption spectra and the ESR spectra, to be Fe2+- or Sn2+-chelate of N-monohydrophenazyl. On the other hand, the reduction of phenazine with stannous chloride and hydrochloric acid gave a phenazhydrin - stannic chloride-complex, which was more stable than the photo-reduction products. Their resistivities at 20°C had low values of from 105 to 108 ohm-cm.
The Absorption Spectra of Dyes. XI. A Note on the Color Change in Some Azobenzene Dyes with Variation in the Acidity
Authors: Tanizaki Yoshié , Kobayashi Tadashi , Hoshi Toshihiko 
Published: July 2006

Abstract
The absorption spectra of azobenzene and its para hydroxy, amino or dimethylamino derivative, and their sodium salts have been determined above 220 mμ in mixed solutions of water and ethanol (7 : 3 in volume) at various acidities. All the samples show characteristic changes in spectra with increase in the acidity, and the respective spectral changes keep well-defined isosbestic points, indicating a binary system spectrally. The wavelengths of the color band peaks and the corresponding spectral species have been determined. Consequently, the following order of the substitution effect has been obtained;
(Remark: Graphics omitted.)
Metal Complexes of Amino Acids. II. The Absorption Spectra of Geometrical Isomers of Copper(II) Complexes
Authors: Yasui Takaji , Shimura Yoichi 
Published: July 2006

Abstract
The geometrical structures of bis(α-amino-acidato)copper(II) complexes have been determined from the data of diffuse reflectance spectra (α-amino-acid = glycine, l- and Dl-α-alanine, l- and Dl-valine, l- and Dl-threonine, l- and Dl-isoleucine and α-aminoisobutyric acid). It has been shown that pairs of cis(N) and trans(N) isomers exist in glycinato and valinato complexes. It has been clarified that the other amino-acidato complexes studied exist either only in the cis(N) form or only in the trans(N) form; that is, the needle and the scaly complexes of Dl-alanine, the complexes of Dl- and l-threonine, and the complex of α-aminoisobutyric acid exist only in the trans(N) form, while the complexes of l- and Dl-isoleucine exist only in the cis(N) form.
The Rheological Behavior of Suspensions of Ion-exchange Resin Particles
Authors: Sen\={o} Manabu , Yamabe Takeo 
Published: July 2006

Abstract
The flow properties of the suspensions of ion-exchange resin particles, the highly-crosslinked polyelectrolyte gel particles, were examined, especially in relation to their charged state. The steady viscosities and the dynamic viscoelasticities of these suspensions were measured, and the results were interpreted in terms of the dispersion state of the suspended particles. The flow system of the highly-charged particles, such as Na-form resin particles, exhibits a high viscoelasticity and is in a well-dispersed state. On the contrary, the flow system of the lower-charged particles, such as Ba-form particles, is not viscoelastic, but viscous and dilatant. This behavior may be attributed to the variation in the electrical double layers around the suspended particles.
The Formation Conditions and the Properties of Copper, Zinc, Ammonium Sulfites
Authors: Omori Keiichi , Okuwaki Akitsugu , Suzuki Takahiro , Ito Hiroshi , Okabe Taijiro 
Published: July 2006

Abstract
On the reaction of an ammonium sulfite solution with a mixed solution of cupric sulfate and zinc sulfate, ten or more complex sulfite salts have been identified by chemical analysis and X-ray diffraction, and their formation regions have been shown with equilateral triangle coordinates. Their crystallographic properties have been examined through optical observation and X-ray diffraction. Usually some of them are formed simultaneously, but sometimes only one of them is formed, depending on the reaction conditions. The newly-found compounds are as follows:
Cu2SO3·7(NH4)2SO3·9H2O Tetragonal
Cu2SO3·ZnSO3·6(NH4)2SO3·10H2O Tetragonal
Cu2SO3·2ZnSO3·5(NH4)2SO3·12H2O Monoclinic
Cu2SO3·4ZnSO3·3(NH4)2SO3·12H2O Hexagonal
Organic Sulfur Compounds. I. Reactions of Arylsulfinic Acids with Alkyl Chlorosulfites
Authors: Kobayashi Michio , Terao Miki , Yamamoto Asami 
Published: July 2006

Abstract
The salts of arylsulfinic acids were found to react with alkyl chlorosulfite to form alkyl sulfinates. p-Toluenesulfinic acids-18O was synthesized and treated with ethyl chlorosulfite to give ethyl p-toluenesulfinate-18O, which retained half of the oxygen atoms existing in the original sulfinic acid. A mechanism for this novel reaction was proposed.
The Magnetic Properties of Several Pseudo-Jahn-Teller Nonbenzenoid Aromatic Hydrocarbons
Authors: Nakajima Takeshi , Kohda Susumu 
Published: July 2006

Abstract
The effect of bond length alternation on the magnetic properties of several Pseudo-Jahn-Teller nonbenzenoid aromatic hydrocarbons with 4ν carbon atoms will be investigated. The magnetic moment and the susceptibility of a cyclic polyene will first be formulated in terms of the bond alternation parameter. Appropriate cross-links for forming nonbenzenoid aromatic hydrocarbons, such as pentalene and heptalene, will then be treated as perturbations. It will be shown that the anomalously large paramagnetic susceptibilities of these molecules predicted by Pullman et al. (“Les Théories Electroniques de la Chimie Organique,” Masson, Paris (1952), p. 527) arise mainly from the neglect of the bond alternation inherent in them. It will then be concluded that the magnetic susceptibility is a very sensitive indicator of the bond alternation, and that the diamag-netically-induced ring currents in these molecules are very much impeded.
The Attempted Cationic Polymerization of 1,1-Dimethylcyclopropane and Phenylcyclopropane
Authors: Aoki Shuzo , Harita Yoshiyuki , Otsu Takayuki , Imoto Minoru 
Published: July 2006

Abstract
1,1-Dimethylcyclopropane and phenylcyclopropane gave the oligomer by aluminum bromide-catalyzed polymerization in n-hexane or in methylene chloride at 0°C. The polymerization reactivity of 1,1-dimethylcyclopropane was lower than that of styrene, and the content of cyclopropane units in their copolymers was decreased by a lowering of the temperature. The polymerization of 1,1-dimethylcyclopropane in the presence of polystyrene gave a graft polymer by chain transfer reaction. The polymerization of the cyclopropanes by a coordinated catalyst, C2H5AlCl2/TiCl3, in n-heptane at room temperature gave polymers with molecular weights of above 1200. The results are discussed in comparison with those of the polymerization of the corresponding vinyl monomers.
The Chemiluminescence of Acyl Luminols
Authors: Omote Yoshimori , Miyake Takeo , Ohmori Seiya , Sugiyama Noboru 
Published: July 2006

Abstract
From a study of the chemiluminescence spectra of acyl luminols (e.g., 3-acetylaminophthalhydrazide, 3-propanoylaminophthalhydrazide and 3-undecenoylaminophthalhydrazide) and of the corresponding fluorescence spectra of the reaction products, it is tentatively assumed that the emitting species of the chemiluminescence of acyl luminols in dimethylformamide-water (3:1 in vol.) is the corresponding 3-acylaminophthalate ion in the excited state.
Radical Yields in the Radiolysis of Neutral Aqueous Solutions
Authors: Sawai Takeshi 
Published: July 2006

Abstract
The determination of the yields of the two reducing species and the OH radical in the radiolysis of neutral aqueous solutions was undertaken, using deaerated 2-propanol aqueous solutions containing potassium nitrate or hydrogen peroxide as electron scavengers. Irradiation was carried out with 60Co γ-rays, and the hydrogen, nitrite ion, acetone, hydrogen peroxide and pinacol so produced were analyzed. The hydrogen yield decreases upon the addition of hydrogen peroxide or nitrate ions. The yield of hydrogen atoms is found to be 0.61±0.03 by subtracting the molecular yield of hydrogen from the total hydrogen yield in the solutions containing enough scavengers. The yield of nitrite ions increases with an increase in the concentration of nitrate ions, and decreases with an increase in the concentration of acetone and with a decrease in the pH value. The acetone yield increases sharply with an increase in the quantity of nitrate ions and reaches a plateau value in the concentration range of nitrate ions higher than 1×10−2m. In the presence of potassium nitrate of 1×10−2m, pinacol is not formed, and the yield of hydrogen peroxide is less than the molecular yield of hydrogen peroxide. On the basis of these results, radiolysis mechanisms are elucidated and the yields of the hydrated electron and the OH radical of a neutral solution are found to be 2.77±0.03 and 3.0 respectively. The relative rate constants, kH+NO3−⁄kH+(CH3)2CHOH and ke−aq+(CH3)2CO⁄ke−aq+NO−3, are found to be 0.18 and 0.78.
Organic Sulfur Compounds. II. The Formation and Thermal Decomposition of Carboxylic Sulfurous Anhydrides
Authors: Kobayashi Michio , Yamamoto Asami 
Published: July 2006

Abstract
Mixed anhydrides of carboxylic acids and monoalkyl sulfites have been prepared, and their thermal decomposition has been studied. Some of these mixed anhydrides can be distilled without decomposition. Disproportionation to carboxylic anhydride and dialkyl sulfite is the main pathway of the thermal decomposition.
The Separation of Alkaline Earth Metals as Their TTA-Complexes by Reversed-Phase Partition Chromatography
Authors: Akaza Ikuko 
Published: July 2006

Abstract
The author’s preceding work, the liquid-liquid extraction of alkaline earth metals with TTA-MIBK, has now been extended to a reversed-phase partition chromatography in order to attain a good separation of the metal ions. The method was carried out with relatively large amounts of the metals through a column of Kel-F on which the organic phase of 1.5 m TTA-MIBK was supported. Elution was performed with 0.5 m buffer solutions, of various pH values, consisting of acetic acid, ammonium acetate and aqueous ammonia. The actual separation of each metal ion from the mixture of alkaline earth metals was achieved; the results are shown in several figures. The dependence of the distribution ratio on the pH of the solution and on the concentration of TTA in the stationary phase was examined from the elution curves; it might be considered that the same relation held as in the case of the liquid-liquid extraction system. Other experiments were then carried out in order to clarify the behavior of the TTA-chelates in the presence of a large amount of TTA; it was found that all of the TTA in the system participated in the effective extraction of the metal ion. The steps in the formation of the higher TTA-chelate in the column are depicted by the break-through curve of the chromatographic process.
ON THE OXIDATION OF SODIUM SULPHITE BY AIR IN THE PRESENCE OF FERROUS HYDROXIDE AND A THEORY OF NEGATIVE INDUCED REACTION
Authors: Miyamoto Susumu 
Published: July 2006

Abstract
1. A theory of negative induced reaction was proposed. Three kinds of negative induced reactions was considered according to the proposed theory. The oxidation of the mixture of stannous hydroxide and sodium sulphite in sodium hydroxide or in sodium carbonate solution by means of air, the results of which being already reported in the previous papers, can be regarded as an example of negative induced reaction of the first kind, and the oxidation of the mixture of ferrous hydroxide and sodium sulphite in sodium hydroxide solution, here reported, as an example of negative induced reaction of the second kind.
2. The oxidation of the mixture of sodium sulphite and ferrous hydroxide in sodium hydroxide solution by means of air was studied, with an expectation, that it will give an example of negative induced reaction. The oxidation velocity of sodium sulphite in the mixture was only measured, which was sufficient for the present purpose. The velocity decreases rapidly with time, and the result was interpreted as a negative induced reaction of the second kind.
3. To ascertain that the decrease of the observed oxidation velocity of sodium sulphite in the mixture is due to the formation of ferric hydroxide, the reaction product of the primary reaction, the oxidation velocity of sodium sulphite in the presence of ferric hydroxide was studied under the same conditions. The expectation was fulfilled.
STUDIES ON MERCAPTALS OF SUGARS. III. ISO-BUTYL MERCAPTALS OF SUGARS
Authors: Uyeda Yoshisuke 
Published: July 2006

Abstract
Iso-butyl mercaptals of three hexoses, one methyl pentose, one pentose and two dioses are crystallized out as new compounds.
Other sugars, e. g. lactose, fructose, xylose are tried but ended in negative results.
REDUCTION OF TRIMETHYL STANNYL HYDROXIDE IN LIQUID AMMONIA
Authors: Harada Taichi 
Published: July 2006

Abstract
(1) General method of reduction of compounds in liquid ammonia by alkali metals and apparatus were described.
(2) Trimethyl stannyl iodide from methyl iodide and sodium-tin alloy and from which trimethyl stannyl hydroxide was prepared.
(3) Trimethyl stannyl free radical was prepared by the reduction of trimethyl stannyl hydroxide with metallic sodium in liquid ammonia solution.
ON THE OXIDATION OF STANNOUS CHLORIDE IN SULPHURIC ACID SOLUTION BY AIR AND THE DISSOLUTION VELOCITY OF OXYGEN INTO SULPHURIC ACID SOLUTION
Authors: Miyamoto Susumu 
Published: July 2006

Abstract
(1) The oxidation velocity of stannous chloride in sulphuric acid solution was observed under quite the same conditions as in the case of the oxidation of the same substance in hydrochloric acid solution, which was reported in the previous paper. The velocity increases slowly as the concentration of sulphuric acid increases as far as it reaches the dissolution velocity of oxygen into the solution, when the concentration of sulphuric acid attains about 0.8 normal, and the further increase of the concentration of sulphuric acid has almost no effect on the oxidation velocity, which was found to be almost independent of the initial concentration of stannous sulphate. The velocity constants, calculated as a zero-order reaction, were approximately expressed as a linear function of the concentration of sulphuric acid.
(2) The dissolution velocity of oxygen into sulphuric acid of various concentrations was calculated from the oxidation velocity observed. The dissolution velocity has nearly the same value as that into hydrochloric acid solution under the same conditions.
(3) The effect of temperature on the oxidation velocity, when the concentration of sulphuric acid is greater than about 0.8 normal, was ascertained to be negligible under the present conditions.
SORPTION OF GAS BY MINERAL. I. HEULANDITE AND CHABAZITE.
Authors: Sameshima Jitsusaburo 
Published: July 2006

Abstract
1. The amounts and the velocities of sorptions by partially dehydrated heulandite of ammonia, carbon dioxide and ethylene have been measured.
2. It was known that the heulandite absorbs only ammonia in considerable amount.
3. The number of mols of ammonia sorped are nearly identical with that of water evaporated in the process of dehydration. So the ammonia is considered to combine chemically with the dehydrated heulandite. The composition of the substance obtained in the present experiment is probably Ca2Al4Si12O32·4H2O·7NH3.
4. The amounts and the velocities of sorptions by dehydrated chabazites of carbon dioxide, ethylene and ammonia have been measured.
5. Chabazite absorbs carbon dioxide and ammonia rapidly, but ethylene slowly.
6. Chabazite absorbs hydrogen only in small quantity.
Preparation and Properties of Metal Complexes in Non-aqueous Solutions. I. Preparation of the trans-Dicyano-bis(ethylenediamine)cobalt(III) Complex by the Use of Dimethylsulfoxide as Solvent
Authors: Muto Masayuki , Baba Tetsuo , Yoneda Hayami 
Published: July 2006

Abstract
An isomeric form of the hitherto known cis-[Co(CN)2 en2]+ was prepared from cis- or trans-[CoCl2 en2]+ and potassium cyanide in dimethylsulfoxide solution. The new complex was characterized by UV, IR and NMR spectra, and its trans configuration was established.
3,4-Benzotropolone and Related Compounds. VI. Brominated 6-Hydroxy-2,3-benzotropone (or Brominated 3-Hyroxy-4,5-benzotropone). Formation and Reaction
Authors: Hoshino Masamatsu , Ebine Seiji 
Published: July 2006

Abstract
6-Hydroxy-2,3-benzotropone (or 3-hydroxy-4,5-benzotropone) (I) was brominated under various conditions, and the bromination products were subjected to debromination, substitution, and some other reactions. I reacted with a molar equivalent of bromine at 25°C to give 7-bromo-6-hydroxy-2,3-benzotropone (II), and with two molar equivalents of bromine at 25°C to give an adduct of II with bromine (V), which, on heating, was dehydrobrominated to 5,7-dibromo-6-hydroxy-2,3-benzotropone (IV). On the other hand, I reacted with bromine at 100°C to give 5-bromo-6-hydroxy-2,3-benzotropone (III), IV, and 2,2,7-tribromo-4,5-benzocyclohepta-4,6-diene-1,3-dione (VI), depending on the amount of bromine employed. All these bromination products could be debrominated with ease with hydrogen in the presence of catalyst to yield I. When II was heated with hydrobromic acid, the 7-bromo substituent was in part eliminated to give I and migrated in part to give III. When IV and 4,7-dibromo-6-hydroxy-2,3-benzotropone (X) were heated with hydrobromic acid, the 7-bromo substituents were eliminated and the 4- or 5-bromo substituent remained unreacted, producing III and 4-bromo-6-hydroxy-2,3-benzotropone (IX) respectively. When II and IV were heated with hydrochloric acid, the 7-bromo substituents were not eliminated but, rather, substituted with chlorine atoms to give 7-chloro-6-hydroxy-2,3-benzotropone (VII) and 5-bromo-7-chloro-6-hydroxy-2,3-benzotropone (VIII) respectively. These facts suggest that I and its bromo derivative sometimes behave as unsaturated β-diketones (I′).
Studies of Heteroaromaticity. XXIV. 1,3-Dipolar Cycloaddition of C-(5-Nitro-2-furyl)-N-phenylnitrone
Authors: Sasaki Tadashi , Yoshioka Toshiyuki , Izure Iwao 
Published: July 2006

Abstract
C-(5-Nitro-2-furyl)-N-phenylnitrone (I) was prepared from 5-nitro-2-furfural and phenylhydroxylamine in an 80% yield. The 1,3-dipolar cycloaddition reactions of I with various olefins were carried out, and the corresponding 5-substituted isoxazolidine derivatives were obtained. The structual elucidation of these products was made on the basis of the nmr spectral data. Several observations support the theory that these reactions proceed via a concerted one-step process.
A Synthesis of Dl-Tryptophan from Acrolein
Authors: Maeda Itsutoshi , Yoshida Ryonosuke 
Published: July 2006

Abstract
Dl-Tryptophan hydrantoin was obtained from phenylhydrazone of β-(hydanto-5-yl)-propionaldehyde acetal (5-(γ,γ-dialkoxypropyl)hydantoin) by Fischer’s indole synthesis. β-(Hydanto-5-yl)propionaldehyde acetal was prepared by Bucherer’s reaction from 1,1-diacetoxy-4,4-dialkoxybutane obtained by the hydroformylation of acrolein acetate. Attempts to crystallize β-(hydanto-5-yl)-propionaldehyde acetal from Bucherer’s reaction solution were unsuccessful, but 5-alkoxy-1,3-dioxoperhydropyrro[1,2-c]imidazole was obtained by treating the solution with ion exchange resins in alcohol. It could be also converted to tryptophan hydantoin.
Spectroscopic Investigations of α-Keto Phosphorus Compounds
Authors: Osaki Takayoshi , Otera Junzo , Kawasaki Yoshikane 
Published: July 2006

Abstract
The NMR, IR, and UV spectra of some α-keto phosphorus compounds, (C2H5)2PCOR, (C2H5)2P(S)COR, and [(C2H5)2CH3PCOR]+I− (R=C6H5 and CH3), were measured. The carbonyl stretching frequency and the n-π* transition show considerable red shifts, but the shifts are smaller than those of α-keto organosilicon compounds. The lowering of the carbonyl π* level, which resulted from the interaction with a vacant d orbital of the phosphorus atom, was found to be largely responsible for the red shift of the n-π* transition in the α-keto phosphorus compounds, particularly in [(C2H5)2CH3PCOR]+I−. The rise in the n level of the carbonyl group was found to be rather small.
Studies of the Synthesis of Furan Compounds. XXIX. Syntheses of 2-(5-Nitro-2-furyl)vinyl-1,8-naphthyridines
Authors: Hirao Ichiro , Kato Yasuhiko , Fukano Yoshimasa , Yanai Shinpei 
Published: July 2006

Abstract
In continuing our study of the relationship between structures and antibacterial activity, 2-[2-(5-nitro-2-furyl)vinyl]-5-hydroxy- and 4-[2-(5-nitro-2-furyl)vinyl]-2,7-dihydroxy-1,8-naphthyridine and their related derivatives have been synthesized. In these compounds, 2-[2-(5-nitro-2-furyl)vinyl]-5-hydroxy- (I) and 2-[2-(5-nitro-2-furyl)vinyl]-5-hydroxy-6-ethoxycarbonyl-1,8-naphthyridine (II) showed broad spectra of antibacterial activity, and the activity of I was greater than that of II. Other compounds exhibit a strong antibacterial activity against Diplococcus pneumoniae, Streptococcus hemolyticus, and Staphilococcus aureus, but they show a weak activity against the other microorganisms tested.
The Synthesis and the Stereochemistry of 4-Chromanones and 4-Chromanols with Bulky Substituents
Authors: Kabuto Kuninobu , Kikuchi Yoriko , Yamaguchi Shozo , Inoue Naoto 
Published: July 2006

Abstract
The synthesis and the stereochemistry of 4-chromanones and 4-chromanols with bulky substituents have been investigated. In 3-substituted chromanones, the t-butyl group exists mainly in the quasi-axial position, while the phenyl group is still in the quasi-equatorial environment. The preferred conformations of the isopropyl, and of the t-butyl group in cis- and trans-2-substituted chromanols, are equatorial, whereas trans-3-t-butylchromanol and its benzoate exist mainly as the conformations in which the t-butyl group is in the axial position. The conformational preference of these compounds can reasonably be explained by considering the steric interactions (A(1,3) strain, gauche, and diaxial repulsion) of these groups. The magnitude of the A(1,3) strain due to the hydroxyl group was estimated to be 1.3 kcal/mol.