Static distortion of radical cations of cyclopropane at 4.2 K: e.s.r. evidence
Abstract
E.s.r. evidence has been obtained that cyclopropane cations exhibit a static distortion from D3h to C2v symmetry in a matrix at 4.2 K; the 3e′(D3h) highest occupied degenerate orbital splits into 6a1 and 3b1(C2v) orbitals and the unpaired electron occupies 6a1, giving dominant spin densities on the two basal carbon atoms.