Crystal Structure and Magnetic Properties of 1,5-Diphenyl-3-(p−Methacry-loyloxymethylphenyl) verdazyl Radical

Abstract

The crystal structure of 1,5-diphenyl-3-(p−methacryloyloxymethyl phenyl)verdazyl radical has been determined. It shows a non-symmetrical antipropeller conformation of its three aryl rings. The molecules are packed in a tilted face-to-face and head-to-tail array giving rise to close overlaps between π-orbitals of sym−tetrazinyl and C-aryl rings of neighbour molecules. The a.c. magnetic susceptibility data indicate that this compound behaves as a quasi-ideal S = 1/2 paramagnet. This quasi-ideal magnetic insulation of the molecules is interpreted in terms of the McConnell's formalism.