An unprecedented mode of association in diselenadiazolyl radicals: crystal structures and magnetic properties of [p-XC6F4CNSeSeN]2 (X=Cl, Br)Electronic supplementary information (ESI) available: analytical data for 2a and b. See http//www.rsc.org/suppdata/cc/b0/b004705h/

Abstract

The two title compounds are isostructural with pairs of diselenadiazolyl radicals associating in an unprecedented manner via an orthogonal interaction between singly occupied molecular orbitals which renders them essentially diamagnetic in the solid state.