1. The chemistry of 1,3-benzodithioles dates back to 1926 when Hurtley and Smiles prepared several 1,3-benzodithioles by condensation of 1,2-benzenedithiol with appropriate carbonyl compounds.1a-c
2. CCXLI.—ortho-Dithiolbenzene
3. CCXCIX.—2 : 2′-Bis-1 : 3-benzdithiolene
4. LXXIX.—Derivatives of 2-phenyl-1 : 3-benzdithiole
5. The chemistry of 1,3-benzodithiolium salts also goes back to 1926.1a-cHurtley and Smiles formulated them as sulfonium salts in accordance with the ideas current at that time. After that 1,3-benzodithiolium salts were investigated mainly from a standpoint of dyestuff chemistry and aromaticity problems. For reviews on 1,3-dithiolium salts, see Ref. 2a-f