1,2-双(四甲基环戊二烯基)四甲基二硅烷与六碳基钼的反应

Reaction of 1,2-Bis (tetramethylcyclopentadienyl )tetramethyldisilane with Hexacarbonyl Molybdenum

１，２－双（四甲基环戊二烯基）四甲基二硅烷与正丁基锂作用生成（四甲基二硅撑）双（四甲基环戊二烯基负离子盐），后者随即与六碳基钼反应形成１，１’－（四甲基二硅撑）双（四甲基环戊二烯基铝负离子盐）－（Ｍｅ２ＳｉＳｉＭｅ２）［Ｍｅ４ＣｐＭｏ（ＣＯ）３－Ｌｉ＋］２（ Ｉ）， Ｉ与冰醋酸作用，随即分别与ＣＣｌ４， ＮＢＳ及Ｉ２反应，生成相应的铝卤化合物（Ｍｅ２ＳｉＳｉＭｅ２）［Ｍｅ４ＣｐＭｏ（ＣＯ）３Ｘ］２［Ｘ＝Ｃｌ（１），Ｂｒ（２），Ｉ（３）］．Ｉ与ＣＨ３Ｉ反应，在钼原子上发生烃基化，得到产物（Ｍｅ２ＳｉＳｉＭｅ２）［Ｍｅ４ＣｐＭｏ（ＣＯ）３Ｍｅ］２（４）；Ｉ与单质Ｉ２直接反应，生成脱硅桥产物Ｍｅ４Ｃｐ（ＣＯ）３Ｉ（５）．经元素分析、 ＩＲ及１Ｈ ＮＭＲ表征了化合物 １－５的结构．

1, 2-Bis(tetramethylcylclopentadie reacted sequentially with n-BuLi and Mo(CO)6 to generate 1, 1 '- (tetramethyldisilandiyl ) bis [tetramethylcyclo-pentadienyltricarbony bdenum anion salt], (Me2SiMe2Si) [Me4CPMo(CO)3-Li+] (I). The further reaction of I with acetic acid, followed by halogenation with CCl4, NBS or I2 respectively yielded the corresponding molybdenum-halogen derivatives, (Me2SiMe2Si) [Me4CpMo(CO)3X]2, [X=Cl(1), Br(2), I (3)]. The reaction of compound I with MeI yielded the methylmolybdenum complex (Me2SiMe2Si ) [Me4CpMo (CO )3Me]2, (4 ). Strangely, the reaction of I directly with I2 gave the desilanyl product Me4CpMo(CO)3I(5). The molecular structures of compound 1-5 were characterized by elemental analyses, IR and 1H NMR spectra.