The Structural Assignments for the Geometrical Isomers of α,α′ -Dimethylstilbene
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概要
- 論文の詳細を見る
<I>cis</I>- and <I>trans</I>-4, 4′-Dinitro-α, α′ -dimethylstilbene were prepared by oxidation of <I>p</I>-nitroacetophenone hydrazone with lead dioxide in benzene, followed by treatment with sulphur dioxide. Catalytic reduction of the <I>trans</I>-dinitro compound gave at least 64% of <I>trans</I>-4,4′-diamino-α, α′-dimethylstilbene, m. p. 157.6°C, and a similar reduction of the cis-dinitro compound afforded a mixture of the cis- and trans-diamino compound which was shown to contain at least 61% of the cis-isomer. On de-amination, the trans-diamino compound yielded α, α′-dimethylstilbene melting at 107°C, and the above mixture of the cis- and trans-isomer, a mixture of the isomeric α, α′-dimethylstil-benes in which the lower melting form predominated (at least 70%). These findings establish that α, α′-dimethylstilbene, m.p. 107°C, has the trans- and the isomer, m. p. 67 °C, the cis-configuration.
- 社団法人 日本化学会の論文
著者
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Nagai Y.
Department of Physics, Osaka University
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Simamura Osamu
Department of Chemistry Faculty of Science The University of Tokyo
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Ehara Leo
Department of Chemistry Faculty of Science The University of Tokyo
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