Synthese et reactivite de nouveaux dihydrurozirconocenes et -hafnocenes substitues achiraux et chiraux
作者:S. Couturier、G. Tainturier、B. Gautheron
DOI:10.1016/s0022-328x(00)93312-6
日期:1980.8
Hydrogenolysis of (M(CH3)2) (M = Zr, Hf) bonds gives new racemic and optically active substituted zirconocene and hafnocene dihydrides A: (RCp)2MH2 (M = Zr, Hf; R = Me, Me2CH, Me3C, PhCH2) and B: (R*Cp)2MH2 (M = Zr, Hf; R* = MeCHEtCH2, PhCHEtCH2), R*CpCpHfH2 R* = PhCHCH3). Substitution of hydridic hydrogens by halogens, mobile hydrogen compounds, addition with unsaturated derivatives are studied. The
(M(CH 3)2)(M = Zr,Hf)键的氢解产生新的外消旋和旋光取代的锆茂和ha茂金属二氢化物A:(RCp)2 MH 2(M = Zr,Hf; R = Me,Me 2 CH,Me 3 C,PhCH 2)和B:(R * Cp)2 MH 2(M = Zr,Hf; R * = MeCHEtCH 2,PhCHEtCH 2),R * CpCpHfH 2R * = PhCHCH 3)。研究了卤素,氢化氢化合物,不饱和衍生物与氢化氢的取代。A和B型络合物是烯烃加氢的良好催化剂。B型配合物在前手性烯烃的催化还原中仅产生较差的不对称诱导。