Spin Densities in Dimesitylmethyl

Abstract

A simple valence bond calculation indicates that if the dimesitylmethyl radical were planar large unpaired spin densities would appear on the ring methyl groups giving a spectrum about 130 gauss wide. A perturbation calculation, assuming that the molecule is very twisted, gives spin densities ρ₁=1.000, ρ₂=—0.069, ρ₃=0.054, ρ₄=—0.040, ρ₅=0.043 on the carbon atoms, numbered from the center outwards.