巻号一覧
25 巻, 4 号
選択された号の論文の10件中1～10を表示しています
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向山 光昭, 光延 旺洋1967 年 25 巻 4 号 p. 289-297
発行日: 1967/04/01
公開日: 2010/06/28
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宍戸 圭一, 石田 忠三1967 年 25 巻 4 号 p. 298-310
発行日: 1967/04/01
公開日: 2011/03/01
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シアノ酢酸エステルとホルムアルデヒドとの反応米沢 正次, 鈴木 重成, 伊藤 博夫, 伊藤 健治1967 年 25 巻 4 号 p. 311-316
発行日: 1967/04/01
公開日: 2010/06/28
ジャーナル フリーIn the presence of catalytic piperidine, various alkyl cyanoacetates were treated with formaldehyde using the corresponding alcohols as solvents in homogeneousand heterogeneous systems. In homogeneous systems, the reaction velocities at 50°C decreased in the following order : methyl>ethyl>n-butyl>isobutyl>isopropyl. The reaction was first order in the concentration of catalyst and second order in the concentrations of the cyanoacetate and formaldehyde. The activation energies were calculated to be : methyl 15.7, ethyl 14.6, isopropyl 13.9, n-butyl 14.6, and isobutyl 13.5 Kcal/mol, indicating the readiness of this type of reactions. In heterogeneous systems, the reaction velocities at 50°C decreased in the following order : methyl>n-butyl>ethyl>isobutyl>isopropyl>cyclohexyl>2-ethylhexyl. The reaction was first order in the concentrations of catalyst and the cyanoacetate. The activation energies were calculated to be : methyl 15.3, ethyl 14.2, isopropyl 14.0, n-butyl 15.1, isobutyl 16.1, cyclohexyl 15.8, and 2-ethylhexyl 14.3 Kcal/mol. It seems likely that this type of reaction proceeds through additive condensation.抄録全体を表示PDF形式でダウンロード (682K) -
ブタジエンのクロルメチル化反応山本 耕介, 木村 午朗1967 年 25 巻 4 号 p. 317-323
発行日: 1967/04/01
公開日: 2011/03/01
ジャーナル フリーChloromethylation of 1, 3-butadiene gave a mixture of 3-chloro-(4-chloromethyl)-tetrahydropyran (1) and 4-chloro-(3-chloromethyl)-tetrahydropyran (2) in 95% yield. The selectively hydrolyzed reaction mixture was hydrogenated to give tetrahydropyran-4-methanol (3) and tetrahydropyran-3-methanol (4). From the amounts of (3) and (4), the ratio of (1) and (2) was calculated to be 1: 2. The higher boiling product obtained by the chloromethylation of butadiene was considered to be chloro-(hydroxymethyl)-tetrahydropyrans (5), intermediates for (1) and (2). Starting from (1) and (2), the following compounds were prepared; 5, 6-dihydro-(4-hydroxymethyl)-2H-pyran, 5, 6-dihydro-(3-hydroxymethyl)-2H-pyran, tetrahydropyran-4-methanol, tetrahydropyran-3-methanol, a mixture of 3-chloro-(4-acetoxymethyl)-tetrahydropyran and 4-chloro-(3-acetoxymethyl)-tetrahydropyran, a mixture of 3-chloro-(4-hydroxymethyl)-tetrahydropyran and 4-chloro-(3-hydroxymethyl)-tetrahydropyran. The reaction of butadiene with dichlorodimethyl ether gave dichlorodipentenyl ethers with some amount of by-products, chloro-(chloromethyl)-tetrahydropyrans. The major product was 5, 5'-dichlorodipentenyl ether (6), and the amount of 1, 2-addition product was much less than that of 1, 4-adduct. From(6), 5, 5'-dihydroxydipentenyl ether and 5, 5'-dihydroxydipentyl ether were also prepared.抄録全体を表示PDF形式でダウンロード (907K) -
ポリ-2-メチル-N-ビニルイミダゾールの電離性町田 誠之, 服部 国彦1967 年 25 巻 4 号 p. 324-328
発行日: 1967/04/01
公開日: 2011/03/01
ジャーナル フリー2-Methyl-N-vinyl imidazole was polymerized in methanol to give a water-soluble polymer with intrinsic viscosity of 3.20 as determined in 0.1 N hydrochloric acid at 30°C. The titration curves measured in the presence and the absence of potassium chloride indicated that the monomer behaved as an ordinary base of strength pKa=7.75. The polymer gave a highly extended titration curve characteristic of polyelectrolyte. In a wide range of the ionization degree β, the following equation derived by the theory of Katchalsky, et al. was obeyed. pH=pKo-log[β/(1-β)]-2.19β where pKo is 6.5. When compared with polyethyleneimine, the poly(1-methyl-N-vinyl imidazole) having weaker basicity seemed to have rather rod-like shape in aqueous solution. Its broad application to industry as a useful cationic polyelectrolyte is expected.抄録全体を表示PDF形式でダウンロード (592K) -
伊東 正朝, 佐野 健一1967 年 25 巻 4 号 p. 329-336
発行日: 1967/04/01
公開日: 2010/06/28
ジャーナル フリーThe kinetics of vapor-phase ammoxidation of toluene and various monoalkylbenzenes over vanadium oxide catalysts supported on alundum carrier was studied in a flow system. The rate of reaction of toluene and the rate of benzonitrile formation were independent of the concentrations of toluene and ammonia in the presence of excessive amounts of oxygen and ammonia. Benzonitrile, carbon dioxide, and hydrogen cyanide were formed concurrently. At low concentration of ammonia, the oxidation into benzoic acid became competitive with benzonitrile formation. Though the rate of oxidation of benzaldehyde was markedly depressed by the presence of toluene, the rate of ammoxidation of benzaldehyde in the presence of toluene was far faster than that of oxidation. It was then suggested that the formation of benzonitrile by way of benzoic acid was insignificant. In the ammoxidation of n-propylbenzene, phthalonitrile and phthalimide were formed in yields up to 20% in addition to benzonitrile. Their formation was assumed to involve a cyclic intermediate.抄録全体を表示PDF形式でダウンロード (939K) -
伊東 正朝1967 年 25 巻 4 号 p. 337-342
発行日: 1967/04/01
公開日: 2010/06/28
ジャーナル フリーVapor-phase ammoxidation of .I-xylene and .I-tolunitrile over a fused vanadium oxide catalyst supported on Alundum carrier was studied in a flow system. Phthalonitrile, the main product, was formed via two parallel routes: (1) stepwise reactions through. ο-tolunitrile, and (2) direct formation from ο-xylene. At low conversion, the rate of phthalonitrile formation was faster than that of phthalimide. The amounts of phthalonitrile and phthalimide formed by the ammoxidation of ο-xylene and of ο-tolunitrile were almost comparable. The hydrolysis of phthalonitrile leading to phthalimide did not occur under the conditions tested. Though phthalimide undergoes oxidation over the catalyst, it becomes more stable in the presence of ο-tolunitrile. The ammoxidation of phthalimide proceeded faster than its oxidation, but the formation of phthalonitrile became independent of ammonia concentration at higher concetrations of ammonia. It was then suggested that phthalonitrile and phthalimide were formed by parallel reactions in which ammonia and/or water took part in their formation.抄録全体を表示PDF形式でダウンロード (673K) -
岩倉 義男, 宇野 敬吉, 原 重義, 高瀬 雄造1967 年 25 巻 4 号 p. 343-348
発行日: 1967/04/01
公開日: 2010/06/28
ジャーナル フリーSome aromatic polyhydantoins were prepared from bis(imino acetic acid) and diisocyanate through polyaddition reaction with subsequent cyclodehydration. Polyhydantoins obtained here had inherent viscosities up to 0.2 and melting points above 250°C They are insoluble in common organic solvents.抄録全体を表示PDF形式でダウンロード (616K) -
日野 哲雄, 明石 武和, 太田 泰弘1967 年 25 巻 4 号 p. 349-354
発行日: 1967/04/01
公開日: 2010/06/28
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中尾 一宗1967 年 25 巻 4 号 p. 355-361
発行日: 1967/04/01
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (1082K)
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