作者:Joseph J. Gajewski、Charles W. Benner、Bruce N. Stahlly、Ralph F. Hall、Ronald I. Sato
DOI:10.1016/0040-4020(82)80166-x
日期:1982.1
cis- and trans - 2,3 - Dimethylenemethylenecyclopropane (C and T) interconvert at 160.0° with a small normal kinetic isotope effect (KIE) when the exo-methylene is deuterated, but the 1,3-shift products, 2-methylethylidenecyclopropane, show a large normal KIE, 1.35 and 1.31, when formed from C and T, respectively. This data can be interpreted in terms of either parallel reactions or a common trimethylenemethane
当外亚甲基氘化时,顺式和反式2,3-二亚甲基亚甲基环丙烷(C和T)在160.0°互变,具有很小的法向动力学同位素效应(KIE),但是1,3-移位产物2-甲基亚乙基亚环丙烷当分别由C和T形成时,显示出较大的法向KIE,分别为1.35和1.31。可以根据平行反应或普通三亚甲基二自由基中间体(在正常的KIE为1.11的情况下形成,并在所需的90°下由于氘的作用而接近以1,29的KIE的1,3-移位产物的形式)来解释该数据。外亚甲基碳的旋转。