bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Rotatory Dispersion and Stereochemistry of Organic Compounds. XI. The Nitrates of Some Hexoses
Authors: Tsuzuki Yojiro , Tanabe Koko , Okamoto Kikuhiko , Yamada Noriko 
Published: July 2006

Abstract
The rotatory dispersions (RD) and the ultraviolet absorptions of eight nitrates of galactopyranoside, altropyranosides, glucofuranoside, mannopyranosides and of glucopyranosides, and also of five hexosepyranosides, have been measured. Studies have also been made of the correlation between the configuration and the Cotton effect, the sign of which has been determined by the RD curve as well as by the dispersion constant computed from the dispersion data, and in some cases by means of the circular dichroism (CD). All the findings and conclusions are consistent with the generalized rule originally found with glucose derivatives (Y. Tsuzuki, K. Tanabe and K. Okamoto, This Bulletin, 39, 761 (1966)). The rule has been shown to be extensively applicable to several hexoses; namely, α-glycosides with a C–ONO2 chromophore of a β(or d)-configuration show negative Cotton effects, and those with a C–ONO2 group of a β(or l)-configuration exhibit positive Cotton effects, while with nitrates of β-glycosides the signs of the Cotton effects are exactly reversed (ref. Conclusion).
Organic Syntheses by Means of Noble Metal Compounds. XV. The Carbonylation of 1, 5, 9-Cyclododecatriene Catalyzed by Palladium
Authors: Tsuji Jiro , Nogi Tatsuo 
Published: July 2006

Abstract
The carbonylation of 1, 5, 9-cyclododecatriene has been carried out in ethanol in the presence of palladium chloride; mono- and diesters have thus been obtained without ring contraction. It has been observed, by means of a study of the NMR and infrared spectra, that the first attack of carbon monoxide occurred at the trans double bond, giving ethyl cyclododecadienecarboxylate. The second attack of carbon monoxide occurred randomly, giving an isomeric mixture of ethyl cyclododecenedicarboxylate. No triester was obtained even under prolonged carbonylation. The true catalyst has been found to be metallic palladium, and the presence of hydrogen chloride has been found to be essential for the catalysis. The oxidation of ethyl cyclododecadienecarboxylate, followed by esterification, has given ethyl succinate and 1, 3, 6-hexanetricarboxylate. This result indicates that the double bonds of ethyl cyclododecadienecarboxylate remain at the original positions.
The Crystal Structure of Succinonitrilo-disilver Nitrate, 2AgNO3·NC(CH2)2CN
Authors: Nomura Teruo , Saito Yoshihiko 
Published: July 2006

Abstract
The structure of 2AgNO3·NC(CH2)2CN has been determined by X-ray analysis. It is mono-clinic; a=5.87, b=17.79, c=4.61 Å, β=118.2°, space group P21⁄a, two formula units in the cell. The structure is essentially ionic and consists of the complex cations, [AgNC(CH2)2CNAg]2+ (Ag–N, 1.97 Å), and the nitrate anions. All the bond lengths are normal. The molecule of succinonitrile was found to take the trans configuration; this is in conformity with the conclusion drawn from the infrared study.
A Mass Spectrometric Study of Phosphorus Oxide
Authors: Hashizume Akio , Wasada Nobuhide , Tsuchiya Toshikazu 
Published: July 2006

Abstract
Phosphorus pentoxide has been investigated with a mass spectrometer over the temperature range from 60°C to 650°C. A Knudsen cell has been installed in the source of the mass spectrometer. Two samples were used in the experiment. One was commercially-available phosphorus pentoxide, while the other had been purified from the commercial phosphorus pentoxide by Finch’s method. The ionization efficiency curves near the appearance potential of P4O9+ and P4O10+, the fractional yield of each ion versus the ionizing voltage have been investigated and interpreted as evidence for the presence of the P4O9 molecule. Three curves representing the intensity of the mass 284 (P4O10+) peak as a function of the temperature have been obtained. Two of them, which set on at about 250°C and 450°C respectively, are related to the known vapor pressure curves of phosphorus pentoxide. The curve with the lowest onset temperature, about 100°C, may be interpreted as a vapor pressure of a new low temperature phase of phosphorus pentoxide.
Ferrocene-containing Polymers. VIII. Polycondensation of N, N-Dimethylaminomethylferrocene with Ferrocene
Authors: Neuse Eberhard W , Koda Kazuko 
Published: July 2006

Abstract
Based on previous investigations involving the self-condensation of the ferrocenyl Mannich base, N, N-diniethylaminomethylferrocene (I), the present paper describes the co-condensation of this Mannich base with ferrocene. The reactions are conducted in the melt phase in the presence of a ZnCl2/HCl catalyst system. The resulting polymeric products are soluble and partially fusible and have number-average molecular weights in the 500–4000 range (unfrac-donated). The polymers, exhibiting the idealized structure III, are closely related to the products of self-condensation (II), with recurring units composed of ferrocenylene and methylene groups and homoannular substitution predominating along the chain. Due to the presence of ferrocene, however, an additional termination step is introduced into the overall reaction,, leading to a reduced degree of polymerization. The considerable excess over the stoichiometric amount of ferrocene required to achieve this competitive termination and concomitant decrease in Mn suggests that pronounced inductive and hyperconjugative effects are operative in the fer-rocenylene-methylene system, resulting in activation of the methylene-substituted ring. The isolation of the lowest homolog possible, diferrocenylmethane, lends further support to the proposed structure of the recurring unit. Spectroscopic evidence obtained on subfractionated material suggests the substitution pattern along the chain to be essentially the same as in the earlier described homocondensation polymers, which is consistent with the assumption of essentially like propagation mechanisms in both cases. A small degree of branching is also inferred from spectroscopic data.
The Absolute and Relative Stereochemical Correlation of Isoflavanone, Sophorol and Naturally-occurring Isoflavan Derivatives
Authors: Suginome Hiroshi 
Published: July 2006

Abstract
By rotatory-dispersion studies, it was confirmed that sophorol, (−) maackiain, pterocarpin, equol and homopterocarpin have the same absolute configuration at position 3. The results of the O. R. D. examination of (−) halostachine and pterocarpinoids allow us to assign the 3R, 4R configuration to pterocarpin and to the related compounds.
The Viscosity and Conductivity of Aqueous Solutions of Electrolytes Mixed with Glycine and Urea
Authors: Tonomura Tokuzo , Okamoto Katsunobu 
Published: July 2006

Abstract
The viscosities, the densities, and the conductivities of aqueous solutions of electrolytes mixed with glycine or with urea have been measured at 15, 25 and 35°C. The relative viscosities and the relative conductivities of the mixed solutions have been expressed by the empirical formulae, η=η′+η0βC and Λ=Λ0(1−γC), respectively. The retarding effect of glycine on the conductivity of the strong electrolytes has been found to be greater than that of urea in the mixed solutions. The states of the hydration of glycine, urea and the strong electrolytes have been discussed on the basis of the relations between B-values in the viscosity formula of Jones and Dole and the effective volumes in aqueous solutions.
Monolayer Adsorption with Nearest Neighbor Interactions
Authors: Tykodi Ralph J 
Published: July 2006

Abstract
A sequence of approximate combinatorial treatments of the localized monolayer adsorption of a gas on a lattice of uniform sites with only nearest neighbor interactions allowed generates a one parameter family of isotherm equations. For each of those cases where the general lattice problem has been solved exactly, it is possible to find a value of the adjustable parameter such that critical behavior on the lattice in question is reproduced exactly.
Sensitization in the Photoconductance of Polyacenaphthylene
Authors: Hayashi Yoshiki , Kuroda Makoto , Inami Akira 
Published: July 2006

Abstract
The sensitization of the photoconductivity in polyacenaphthylene by a dye and/or a Lewis acid was investigated. The most effective materials are methylene blue (E1⁄2=1500 lux. sec.), rhoda-mine 6G (6000 lux. sec.), and victoria pure blue (6500 lux. sec.) in the dye sensitization, and 1-nitroanthraquinone (1200 lux. sec.), 2, 3-dichloronaphthoquinone (1400 lux. sec.), 1, 5-dichlo-roanthraquinone (1500 lux. sec.), chloranil (1800 lux. sec.), and 2-chloroanthraquinone (1900 lux. sec.) in the Lewis-acid sensitization. The combined effects of a dye and a strong acid were determined in the case of polyacenaphthylene as well as poly-N-vinylcarbazole.
Ammoniak-Synthese an einigen legierten Katalysatoren
Authors: Brill Rudolf , Ohsumi Yoshio 
Published: July 2006

Abstract
Es wird versucht, Eisenkatalysatoren fur die Ammoniak-Synthese herzustellen, bei denen dem Eisen Fremdmetalle (Chrom, Nickel, Kupfer) zulegiert sind. Um Katalysatoren mit einer Struktur zu erhalten, die der Struktur der aus reinem Eisen hergestellten vergleichbar ist, wurden die Fremdmetalle als solche oder als Oxide dem Carbonyleisen beigemischt, das dann in üblicher Weise durch Schmelzen im Sauerstoffstrom in Magnetit übergeführt wurde. Eine Mischkristall-bildung in der Magnetitphase wurde nur bei Nickel und Chrom gefunden. Durch Reduktion der Spinelle wurde nur bei Nickel eine Legierungsbildung festgestellt. Cr2FeO4 war unter unseren Bedingungen (Reduktion bei 400°C mit Wassersoff-Stickstoff-Gemisch) nicht reduzierbar. Alle mit Kupfer hergestellten Katalysatoren zeigten im reduzierten Zustand Kupfer neben Eisen. Die Legierungskatalysatoren mit Nickel zeigten bei Gehalten bis zu 5% Nickel innerhalb der Fehler-grenze dieselbe Aktivierungsenergie wie reines Eisen, wahrend Katalysatoren mit 10—30% Nickel eine merklich geringere Aktivierungsenergie aufweisen, jedoch tritt dabei ein Kompensationseffekt auf.
The Dipole Moments of the Oligomer of Ethylenediamine
Authors: Kimura Ko , Toshiyasu Yoshio , Fujishiro Ryoichi 
Published: July 2006

Abstract
The dipole moments of ethylenediamine (N=1), diethylenetriamine (N=2), triethylenetetramine (N=3), and tetraethylenepentamine (N=4) were measured in a benzene solution at 25°C and 45°C. The observed dipole moments of N=1, N=2, N=3, and N=4 are 1.89 D, 2.22 D, 2.37 D, and 2.56 D respectively at 25°C, and 1.84 D, 2.22 D, 2.36 D, and 2.58 D respectively at 45°C. The dipole moments were theoretically calculated on the assumptions that; (i) the dipole moments of these chain molecules are given by the vector sum of the dipole moments of the polar groups of amine, and (ii) all internal rotations about single bonds are free. The calculated values of N=1, N=2, N=3, and N=4 are 1.84 D, 2.15 D, 2.43 D, and 2.68 D respectively. The agreement between the observed values and the calculated values is satisfactory. It may, therefore, be expected that the molecular chains will be in the random coil state. The intramolecular hydrogenbonding is very weak, as there is no temperature dependence of the observed dipole moments.
A Molecular Compound between Glutamic Acid and Pyroglutamic Acid
Authors: Suzuki Yoshihisa , Nagashima Nobuya 
Published: July 2006

Abstract
A new molecular compound, which consists of l-glutamic acid, l-pyroglutamic acid and water of crystallization in a 1 : 1 : 1 mole ratio, has been discovered. In its crystal, the unit-cell is monoclinic with a=5.10, b=7.20, c=18.38 Å, and β=96.6°C, and the space group has been determined to be P21. Equilibrium measurements in the system of l-glutamic acid, l-pyroglutamic acid and water at 20°C, 30°C, and 50°C, showed that the transition temperature from the molecular compound to l-pyroglutamic acid and α-form l-glutamic acid is 35.5°C, while that to l-pyroglutamic acid and β-form l-glutamic acid is 20.5°C. Thus, the molecular compound is stable only below this temperature. This molecular compound has an incongruent solubility. When it is placed in water, a crystallization of l-glutamic acid takes place as the molecular compound is dissolved. A similar molecular compound consisting of d-glutamic acid and d-pyroglutamic acid is also obtained, but no molecular compound of the l-glutamic acid and d-pyroglutamic acid, or vice versa, is obtainable. On the basis of these facts, an optical resolution is actually possible for glutamic acid. When this molecular compound is heated, it is converted into another molecular compound at about 70°C due to the loss of the water of crystallization; then it is decomposed to l-glutamic acid (β-form) and l-pyroglutamic acid at about 90°C.
Studies of Peptide Antibiotics. IV. The Synthesis of Tyrocidine A
Authors: Ohno Motonori , Kato Tetsuo , Makisumi Satoru , Izumiya Nobuo 
Published: July 2006

Abstract
The synthesis of a cyclic decapeptide, cyclo-l-phenylalanyl-d-phenylalanyl-l-asparaginyl-l-glutaminyl-l-tyrosyl-l-valyl-l-ornithyl-l-leucyl-d-phenylalanyl-l-prolyl, which has an amino acid sequence determined by Craig et al. for natural antibiotics, tyrocidine A, has been described. The chemical and biological properties of the synthetic product have been shown to be in agreement with those of the natural tyrocidine A.
The Knoevenagel Reaction between Hydroxybenzaldehydes and Ethyl Cyanoacetate
Authors: Yasuda Heinosuke , Midorikawa Hiroshi 
Published: July 2006

Abstract
Substituted 2-hydroxybenzaldehydes react with two equivalents of ethyl cyanoacetate to give α-β-(substituted 3-coumarinyl)-β-cyano-β-ethoxycarbonylethylenes in the presence of piperidine. When equivalent aldehyde and the cyanoacetate are used, substituted 2-imino-3-ethoxycarbonyl-2H-chromenes result, without the isolation of arylidenecyanoacetates. In o-hydroxyaryls, salicylic and o-thymotinic aldehydes, which give benzopyrane derivatives, are exceptional cases. 5-Phenylazo- and 5-nitro-2-hydroxybenzaldehydes result in the formation of coumarin derivatives. An abnormal condensation is also shown in the cases of 3, 5-dibromo-2, 4-dihydroxy-, 2-hydroxy-3-methoxy- and 2-hydroxy-4-methoxybenzaldehydes; i. e., the first one yields a 1:1-condensation product, while the last two give 3-cyanocoumarin derivatives, even with an excess of ethyl cyanoacetate. The condensation of m- and p-hydroxybenzaldehydes with ethyl cyanoacetate give the normally-expected arylidenecyanoacetates, even in the presence of a large excess of the cyanoacetate.
Organic Sulfur Compounds. IX. The Reactions of N-Sulfinylamines with Nitrogen Tetroxide and Nitrosyl Chloride
Authors: Kobayashi Michio , Honda Koichi 
Published: July 2006

Abstract
N-Sulfinylaniline reacted with nitrogen tetroxide to form the anhydrous benzenediazonium nitrate. The reactions of N-sulfinylaniline and several of its p-substituted derivatives with nitrosyl chloride also gave the anhydrous diazonium chlorides in the crystalline state. Aliphatic N-sulfinyl-amines reacted with nitrosyl chloride to form alkyl chlorides, probably by the decomposition of the initially-formed diazonium chlorides; during this reaction, no rearrangement of the alkyl group was observed.
Organic Sulfur Compounds. XI. The Reactions of the Cyclic Sulfites with the Aromatic Aldehydes
Authors: Kobayashi Michio , Yabe Akira , Kiritani Reiko 
Published: July 2006

Abstract
The reactions of the cyclic sulfites with aldehydes to give the cyclic acetals have been investigated with the stereochemical and with the 18O tracer technique. Both groups of evidence have indicated that the bonds broken are the S–O, not the C–O bond, of the sulfites.
Studies on Reactions of Polypropyrene. VI. The Thermal Degradation of Polypropylene Accelerated by the Fine Powdery Polymer with Closslinkage
Authors: Mizutani Yukio , Yamamoto Keiichi , Matsuoka Seishiro 
Published: July 2006

Abstract
The thermal degradation of polypropylene was investigated in the presence of the fine powdery polymer with crosslinkage by the use of an extruder under a nitrogen atmosphere. The fine powdery polymer was thus found to be effective as an accelerator for the thermal degradation of polypropylene. The fine powdery polymer used was prepared by the emulsion polymerization of some vinyl monomers and divinyl benzene or by the polymerization of glycidyl methacrylate and divinyl benzene in n-heptane. The fine powdery polymer consisting of glycidyl methacrylate and divinyl benzene was preferable to that with no reactive functional group, because of the reactivity of the glycidyl group. The polypropylene was modified and made dyeable by the thermal degradation accelerated by the fine powdery polymer.
The Syntheses of Polypyromellitimide-amides
Authors: Saga Motoo , Shono Toshiyuki , Shinra Koichiro 
Published: July 2006

Abstract
Dibasic acids containing a pyromellitimide ring were synthesized by the reaction of pyromel-litic dianhydride with such ω-aminoacids as glycine, ε-amino-caproic acid and p-amino-benzoic acid. By the condensation polymerization of the dibasic acids obtained above with diamines, polypyromellitimide-amides were synthesized. The polymers were soluble in m-cresol and sulfuric acid, and the inherent viscosities of the polymers ranged from 0.21 to 0.42 (in m-cresol). The polymers were found to be considerably heat-stable.
Studies on Amino-hexoses. IX. The N-Deacetylation of Methyl N-Acetyl-β-d-glucosaminide, Methyl N-Acetyl-3-O-methyl-α- and β-d-glucosaminide, and Methyl N-Acetyl-4,6-O-ethylidene-α-d-glcosaminide
Authors: Fujinaga Mamoru , Matsushima Yoshio 
Published: July 2006

Abstract
The efficiency of hydrazine as a mild N-deacetylating reagent has been studied in the reaction of hydrazine with four N-acetylaminosugars. This reagent has been shown to be of great use in the N-deacetylation of methyl N-acetyl-β-d-glucosaminide and methyl N-acetyl-4,6-O-ethylidene-α-d-glucosaminide. It may be noted that the 3-O-substitution of the sugars makes the deacetylation reaction reluctant. The synthesis of methyl N-acetyl-4,6-O-ethylidene-α-d-glucosaminide and the isolation of crystalline methyl β-d-glucosaminide and methyl 4,6-O-ethylidene-α-d-glucosaminide in the free-base form have been described.
Kinetic Studies of the Oxidation of Uranium Iodides by Oxygen
Authors: Handa Muneo 
Published: July 2006

Abstract
The kinetics of the oxidations of uranium tetraiodide and of triiodide by oxygen were studied over the temperature ranges from 55.0 to 66.5°C and from 88.5 to 103.5°C respectively. The experiments were carried out with an apparatus in which the column of a gas chromato-graph was replaced by an electric furance and traps of water vapor, oxygen and iodine. Most of the experiments were performed with the same partial pressure of oxygen (64 mmHg) and total flow rate (60 ml. per min.). The activation energies for the reaction of oxygen with uranium tetraiodide and triiodide were, respectively, 21.1 and 22.5 kcal. per mole. The rate of the formation of uranium trioxide was in agreement with the kinetics to be expected for reaction between a gas and a solid at a continuously diminishing spherical interface.
Correlations of the Structural Unit of Organic Compounds with the G Values of Thier Radiolytic Products
Authors: Isoya Toshiro , Hirota Kozo , Hatada Motoyoshi 
Published: July 2006

Abstract
Two correlations have been found between the G values of the radiolytic products and the number of the structural unit, n, in an organic molecule; (i) The G value from the homologous compounds has a linear relation to 1/n in the n≤m region and is independent of n in the n≥m region, where m is the number of the C–C bond through which the energy can be transferred, and (ii) the G(CH4) value from paraffin hydrocarbons, where the “terminal effect” is remarkable, has a linear relation to 1/n in both the n≥m and n≤m regions. These relations may be explained in terms of the energy transfer through C–C bonds.
The Constitution, Reactivity and Thermal Change of Phosphate Ores
Authors: Ando Jumpei , Matsuno Seiichi 
Published: July 2006

Abstract
Tests were made on twenty-five samples of phosphate ores from all over the world deposits. All of the samples consisted of apatite, plus small amounts of calcite and other minerals. The apatite crystals of the sedimentary ores ranged in size from around 0.05 μ (Gafsa, North Carolina, etc.) to around 0.5μ (Taiba), while those of igneous ores reached 100 μ. The difference between the ores in their reactivity with citric, hydrochloric and nitric acid was mainly due to the difference in crystal size. The decomposition of the ores by a mixture of sulfuric and phosphoric acids was seriously affected by the coating of calcium sulfate crystals on the surface of the ores, and also by the aluminum and iron present in the acids and ores. The lattice constant, a0, of the apatite of the ores ranged from 9.340 to 9.422 Å; it was generally smaller for the ores which had larger F2/P2O5 ratios. Upon calcination above 500°C, the a0 value of the apatite which had an excess of fluorine increased and approached that of true fluorapatite. The reactivity of the ores with the acids generally decreased upon calcination due to the sintering of the grains and the crystal growth. For ease of decomposition by a mixture of sulfuric and phosphoric acids, the calcined ore should contain a small amount of carbon dioxide. Tests also were made on the amount of organic matter and its decrease upon calcination.
Photochemical Reactions of Ethyl Chloroglyoxylate with Cyclohexane, Cyclohexene, and Toluene
Authors: Pac Chyongjin , Tsutsumi Shigeru 
Published: July 2006

Abstract
The photochemical reactions of ethyl chloroglyoxylate with cyclohexane, cyclohexene, and toluene have been carried out, and the reactivity of an alkyl radical towards ethyl chloroglyoxylate has been qualitatively discussed. A cyclohexyl radical attacks the carbonyl group of the acid chloride function in ethyl chloroglyoxylate to cause a chain reaction; cyclohexanecarbonyl chloride (51%) and ethyl cyclohexylglyoxylate (2—3%) are thus obtained, along with other minor products. On the other hand, a cyclohexen-3-yl or a benzyl radical might be unable to attack ethyl chloroglyoxylate under the conditions investigated.
The Synthesis of 5- and 6-Aminoazulene Derivatives from 5- and 6-Acetylazulene Derivatives
Authors: Nozoe Tetsuo , Takase Kahei , Tada Masao 
Published: July 2006

Abstract
The Schmidt reactions on diethyl 5-acetyl-2-aminoazulene-1, 3-dicarboxylate and diethyl 6-acetyl-2-aminoazulene-1, 3-dicarboxylate afforded diethyl 2, 5-diaminoazulene-1, 3-dicarboxylate(I) and diethyl 2, 6-diaminoazulene-1, 3-dicarboxylate respectively. A preferential formation of the 5-acetamido-2-amino compound upon the mild acetylation of I, which contrasted with the preferential diazotization of the 2-amino group, was observed.
The Reaction of Methylchlorodisilanes with t-Butyl Hydroperoxide
Authors: Kawazumi Kazuhisa , Murai Bunjiro 
Published: July 2006

Abstract
The authors wished to get two new organosilyl peroxides with a silicon-silicon linkage, t-butylperoxypentamethyldisilane [(CH3)3SiSi(CH3)2(OOC(CH3)3)] and 1, 2-di-t-butylperoxytetramethyldisilane [((CH3)3COO)(CH3)2SiSi(CH3)2(OOC(CH3)3)], by the reaction of the corresponding chlorodisilanes with t-butyl hydroperoxide. The reaction, however, did not give the desired product; rather, it led to the formation of t-butoxypentamethyldisiloxane [(CH3)3SiOSi(CH3)2-(OC(CH3)3)] and 1-t-butoxy-3-t-butylperoxytetramethyldisiloxane [((CH3)3CO)(CH3)2SiOSi-(CH3)2(OOC(CH3)3)] respectively, substances which are believed to have resulted from the intramolecular rearrangement of the desired peroxydisilanes.
Studies of Thio Acids. VI. The Electrolysis of Thiostearic Acid
Authors: Hirabayashi Yoshio , Mazume Tetsuro 
Published: July 2006

Abstract
Potassium thiostearate was electrolyzed in methanol in the presence of an excess of thiostearic acid by the use of platinum electrodes and a direct current. The product obtained by this electrolysis was found to consist of distearoyl disulfide, methyl stearate, stearic acid, and thiostearic acid. The mechanism of the formation of the above components was discussed in contrast with that of the Kolbe reaction of fatty acids.