Preparation and Structure of 3,4,8,9-Tetrachloro-2,5,7,10-Tetrahydro[1,6]Dithiecine

摘要

The reaction of Z-1,4-dibromo-2,3-dichlorobut-2-ene (1) with sodium sulfide leads to 3,4,8,9-tetrachloro-2,5,7,10-tetrahydro[1,6]dithiecine (2) as the principal product, rather than the anticipated 3,4-dichloro-2,5-dihydrothiophene (3). Compound (2) was characterized spectroscopically and its structure determined by X-Ray crystallography.