13C n.m.r. spectroscopic measurement of the rotational barrier in the 1-cyclopropyl-3-methylbuta-1,2-dienyl cation. Preference for the bisected conformation of an α-cyclopropyl-vinyl cation
Abstract
The cyclopropyl rotational barrier in the 1-cyclopropyl-3-methylbuta-1,2-dienyl cation has been measured using 100 MHz 13C n.m.r. spectroscopy.