Bulletin of the Chemical Society of Japan

The Steric Effects of Alkyl Groups on the N–H Stretching Vibrations and the Rotational Isomerism of Alkylureas

Y Mido, T Gohda

文献索引：Mido,Y.; Gohda,T. Bulletin of the Chemical Society of Japan, 1975 , vol. 48, p. 2704 - 2707

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被引用次数: 27

摘要

The free N–H stretching vibrations of various trialkylureas, R 2 UR′, in dilute solutions were studied in order to resolve our questions concerning the rotational isomerism of dialkylureas. In the infrared spectrum of R 2 UR′, where R is isopropyl or cyclohexyl, an additional N–H band appears on the higher-frequency side of the trans N–H band. It was also observed that the larger the effective size of the R′ group on R 2 UR′ is, the stronger the intensity of ...