1050 Mamalis and Rydoiz: The Alkaliqze Fission of picrylsulphonate (Stahmann, Fruton, and Bergmann, J. Org. Chem., 1946, 11, 518, 704), which resulted in the precipitation of the beautifully crystalline dimethylvinylsulphonium picrylsulphonate. The identity of the latter