Structural assignment of the dianion of 3-methylbut-2-enoic acid
Abstract
13 C N.m.r. spectra of the dianion of 3-methylbut-2-enoic acid suggest a delocalized structure; ab initio STO/3G calculations show that the only stable delocalized structure is that in which the metal lies above the plane of the molecule, as in simple allylic systems.