SPIN DISTRIBUTION IN 3,4-DITHIACYCLOBUTENE (DITHIETE) RADICAL CATION

Abstract
Hückel and ab initio (STO-3G) calculations confirm the experimental assignment of the 3,4-dithiacyclobutene (dithiete) radical cation as a π radical with a SOMO symmetric to a plane bisecting the C[sbnd]C and S[sbnd]S bonds. However, neither calculation is in good agreement with the low value of p c≅0.1 observed experimentally.