N. Feeder et al., An unprecedented mode of association in diselenadiazolyl radicals: crystalstructures and magnetic properties of [p-XC6F4CNSeSeN](2) (X=Cl, Br), CHEM COMMUN, (24), 2000, pp. 2449-2450
The two title compounds are isostructural with pairs of diselenadiazolyl ra
dicals associating in an unprecedented manner via an orthogonal interaction
between singly occupied molecular orbitals which renders them essentially
diamagnetic in the solid state.