Preparation of 4-benzylsulfanyl[1,2,3,5]dithiadiazol-1-ylium chlorides: potential precursors to meso-ionic 1,2,3,5-dithiadiazolium-4-thiolate - Thomas Gelbrich; Mark Humphries; Michael B. Hursthouse; Christopher A. Ramsden (ARKIVOC, 2002)