Group14 monolithio compounds with sterically encumbered terphenyl ligands, ArM14(SiHMe2)2Li [M14 = Si, Ge, Sn; Ar = 2,6-bis(2,6-diisopropylphenyl)phenyl and 2,6-bis(2,4,6-triisopropylphenyl)phenyl], were prepared by transmetalation reactions of ArM14(SiHMe2)3 with methyllithium, the structures of which were established by X-ray diffraction analysis. The monolithiosilanes and monolithiogermanes reacted
具有空间位阻三联苯配体的第 14 族单锂硫化合物,ArM14(SiHMe2)2Li [M14 = Si, Ge, Sn; Ar = 2,6-双(2,6-二异丙基苯基)苯基和2,6-双(2,4,6-三异丙基苯基)苯基],是通过ArM14(SiHMe2)3与甲基锂的金属转移反应制备的,结构式为由 X 射线衍射分析确定。单锂硫硅烷和单硫锗烷与碘甲烷和三氯膦反应,分别得到相应的单甲基化和二氯膦取代的衍生物。然而,令人惊讶的是,单硫锡烷与碘甲烷和三氯膦的反应分别提供了三甲基锡烷和三氯锡烷。
Synthesis, structure and reactions of a trianion equivalent, trilithiostannane
Transmetallation reaction of trisilylstannane ArSn(SiHMe(2))(3) (Ar = 2,6-bis(2,4,6-triisopropylphenyl)phenyl), bearing a bulky substituent on the tin atom, with methyllithium in THF at room temperature gave the first trianion equivalent, trilithiostannane ArSnLi(3), the generation of which was confirmed by trapping experiments with some electrophiles as well as by (119)Sn and (7)Li NMR spectroscopy