The dehydrocoupling of phenylsilane with Cp′2MCl2/Red-Al (Cp′ = C5H5 or C5Me5; M = Ti, Zr, Hf; Red-Al = Na[H2Al(OCH2CH2OMe)2]) cormbination catalysts rapidly produces linear polyphenylsilanes, and the linear selectivity drastically decreases in the order of Cp(C5Me5)Hf > Cp2Hf > Cp(C5Me5)Zr > Cp2Zr > Cp2Ti; in the presence of solvent (neat > toluene > THF) and 4 Å molecular sieve; with heating.
苯基
硅烷与 Cp′2MCl2/Red-Al(Cp′ =
C5H5 或 C5Me5;M = Ti、Zr、Hf;Red-Al=Na[H2Al(OCH2CH2OMe)2])偶联催化剂可快速生成线性多苯基
硅烷,线性选择性急剧下降,顺序为 Cp(C5Me5)Hf > Cp2Hf > Cp(C5Me5)Zr > Cp2Zr > Cp2Ti;存在溶剂(纯净 >
甲苯 >
四氢呋喃)和 4 Å
分子筛;加热。