R. Okazaki et al., SYNTHESIS OF SMALL-RING SULFUR-COMPOUNDS CONTAINING GERMANIUM AND TIN, Phosphorus, sulfur and silicon and the related elements, 74(1-4), 1993, pp. 397-398
Synthesis of some novel types of four-membered organosulfur compounds
containing germanium and tin by [2+2]cycloaddition of germanethione (R
1R2Ge=S) and stannanethione (R1R2Sn=S) intermediates is reported.