Citation: R. Huisgen et al., 1,3-dipolar cycloadditions: Part 121 'Thiobenzophenone S-methylide' (= (diphenylmethylidenesulfonio)methanide), and C,C multiple bonds: Cycloadditions and dipolarophilic reactivities, HELV CHIM A, 84(5), 2001, pp. 981-999