New polysulfur–nitrogen heterocycles as precursors of thiazyl radicals

Both thermolysis and photolysis of 1,2,4λ⁴δ²,3,5- and 1,3λ⁴δ²,5,2,4-benzotrithiadiazepines in hydrocarbon solvents yielded stable 1,2,3- and 1,3,2-benzodithiazolyls, which can be considered as a particular case of a previously unmentioned trend of neutral polysulfur–nitrogen heterocycles to form thiazyl π-radicals.