摘要通过[NbCl 5]与C 5反应,分离了具有官能化(二氯甲基甲硅烷基)环戊二烯基配体的铌配合物[NbCp Cl Cl 4](Cp Clη5 -C 5 H 4(SiCl 2 Me))(1)。 H 4(SiCl 2 Me)(SiMe 3)。在加入LiNHt Bu之后,配合物1是亚氨基甲硅烷基酰胺衍生物[NbCp N Cl 2(N t Bu)](Cp Nη5 -C 5 H 4 [SiClMe(NH t Bu)])(2)的前体,当与SiCl 3 Me反应时,其随后得到二氯甲硅烷基化合物[NbCp Cl Cl 2(N t Bu)](3)。在配合物2中添加LiNH t Bu得到铌酰胺基配合物[NbCp N Cl(NH t Bu)(N t Bu)](4),随着铌-酰氨基和硅-氯基团的交换而缓慢演化。二氯铌配合物[NbCp NN Cl 2(N t Bu)](Cp NNη5 -C 5 H 4 [SiMe(NH
The synthesis of (C5H4)(SiMeCl2)(SiMe3) is described. The reaction of a dichloromethane solution of this compound with one equivalent of titanium tetrachloride leads to the monocyclopentadienyl complex [TiCl3{eta(5)-C5H4(SiMeCl2)}]. Treatment of this complex with the lithium amides LiN(SiMe3)(2) and LiNH'Bu affords [TiCl2{N(SiMe3)2}{eta(5)-C5H4(SiMeCl2)}] and [TiCl2{eta(5)-C5H4[SiMeCl(eta-N'Bu)]}], respectively. Alkylation of the trichlorotitanium derivative with 1.5 equivalents of Mg(CH2C6H5)(2)(THF)(2) leads to the tribenzyl derivative [TI(CH2C6H5)(3){eta(5)-C5H4(SiMeCl2)}]. Hydrolysis of the trichloro-and tribenzyl-complexes leads to the mu-oxo dititanium compounds [TiX2 mu-{eta(5)-C5H4(eta-OSiMeCl)}](2) (X = CI, CH2Ph). All of the new complexes were characterized by elemental analysis and NMR spectroscopy. (C) 1998 Elsevier Science S.A.