Ring-opening Reactions of Cyclic Ethers. IX. Molecular Weight Distribution of Adducts in the Acid-catalyzed Reactions of Epichlorohydrin with Alcohols
作者:Shizen Sekiguchi、Yasushi Hasegawa、Kenji Nakamura、Kohji Matsui、Kensuke Nagahama
DOI:10.1246/bcsj.49.1638
日期:1976.6
It was found that the molecular weights of adducts in the acid-catalyzed reactions of epichlorohydrin with alcohols obey the Weibull-Nycander distribution but not the Flory distribution. The distribution constants (C=ki⁄k0) were found to be smaller than 1, indicating that the reaction rate of the initial stage (k0), i.e., the reaction of epichlorohydrin with a starting alcohol, is greater than the
发现在环氧氯丙烷与醇的酸催化反应中加合物的分子量服从 Weibull-Nycander 分布而不是 Flory 分布。发现分布常数 (C=ki⁄k0) 小于 1,表明初始阶段的反应速率 (k0),即环氧氯丙烷与起始醇的反应,大于后期的速率阶段 (ki),即环氧氯丙烷与其加合物的反应。结果表明反应通过“边界”A-2 机制进行。