Synthesis of the first fluoro(phosphanyl)- and diphosphanyl-stannanes and surprising formation of [P(SnMe<sub>3</sub>)<sub>4</sub>]<sup>+</sup>SiF<sub>5</sub><sup>−</sup>
作者:Matthias Driess、Klaus Merz、Christian Monsé
DOI:10.1039/b308660g
日期:——
Monophosphanylation of the difluorostannane Is2SnF2
(Is = 2,4,6-triisopropylphenyl) with Si(PH2)4 furnishes the first isolable fluoro(phosphanyl)stannane Is2Sn(F)PH2 1, which readily undergoes unique SiO2-assisted decompostion to [Is2Sn(PH)]2 2 and HF, while further phosphanylation of 1 leads to the remarkably stable diphosphanylstannane Is2Sn(PH2)2 3; the latter reacts with Me3SnF at the glass-wall to give the first perstannylphosphonium pentafluorosilicate [P(SnMe3)
4]+SiF5â 4.
对二氟锡烷 Is2SnF2 (Is = 2,4,6-三异丙基苯)进行单磷基化反应,使用 Si(PH2)4,生成了第一个可分离的氟(磷烷基)锡烷 Is2Sn(F)PH2 1。该化合物在 SiO2 辅助下,可以独特地分解为 [Is2Sn(PH)]2 2 和 HF,而对 1 进行进一步的磷化反应则生成了相当稳定的双磷烷基锡烷 Is2Sn(PH2)2 3;后者与 Me3SnF 在玻璃壁上反应,生成了第一个过锡基磷镇阳离子五氟硅酸盐 [P(SnMe3)4]+SiF5¯ 4。