Preparation and solid state characterization of 1,2,3,5-diselenadiazolyl [HCN2Se2]

The reaction of N,N,N′-tris(trimethylsilyl)formamidine with SeCl2 affords 1,2,3,5-diselenadiazolium chloride, which can be reduced with triphenylantimony to the corresponding diselenadiazolyl radical [HCN2Se2]˙; the solid state structure and conductivity of the dimer [HCN2Se2]2 are reported.