Synthesis of a thiastannirane by the reaction of a stannylene with a thiocarbonyl compound

Article abstract of DOI:10.1021/om00025a002

The reaction of stannylene 1 with di-tert-butylthioketene (2) gave first thiastannirane 3 as air-and moisture-sensitive crystals. X-ray analysis showed that 3 contains an acute C-Sn-Sangle (45.7°) and a short C-S bond (1.79 A?) responsible for the weakness of the Sn-C and Sn-S bonds. The reaction of 1 with thioketones 5a,b furnished thiastannolanes 8a,b via stannathiocarbonylylides 6 or thiastannirane 7 intermediates. Crystal data for 3: space group P2₁2₁2₁, Z = 4, a = 12.308 (2) A?, b = 14.725 (2) A?, c = 18.947 (2) A?, V = 3433.8 A?³, R = 0.050, R_w = 0.064 based on 2505 reflections with |F_o²| ≥ 3σ|F_o²|.