STUDIES ON THE REACTION BETWEEN BIS((TRIMETHYLSILYL)CYCLOPENTADIENYL)NIOBIUM TRIHYDRIDE AND STYRENE

被引：22

作者：

ANTINOLO, A ^{[1
]}

CARRILLO, F ^{[1
]}

GARCIAYUSTE, S ^{[1
]}

OTERO, A ^{[1
]}

机构：

[1] UNIV CASTILLA LA MANCHA, DEPT QUIM INORGAN ORGAN & BIOQUIM, E-13071 CIUDAD REAL, SPAIN

来源：

ORGANOMETALLICS | 1994年 / 13卷 / 07期

关键词：

D O I：

10.1021/om00019a036

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Bis((trimethylsilyl)cyclopentadienyl)niobium hydride styrene, Nb(175-CrH4SiMe3)2(H)(eta2-PhCH=CH2) (3), has been prepared both from the reaction of Nb(eta5-C5H4SiMe3)2H3 (1) with styrene and from that of Nb(eta5-C5H4SiMe3)Cl2 (2) with PhCH2CH2MgBr. The first method gives rise to two isomeric products (endo, where the olefinic substituent is central, and exo, with the olefinic substituent lateral in the equatorial plane), while the latter leads exclusively to the endo isomer. The mechanism of the formation of 3 is discussed in terms of a model which implies a consecutive reaction with a reversible step and a first-order rate dependence with respect to 1. Finally, the kinetics of the olefin-hydride insertion have been studied by H-1 NMR spectroscopy using coalescence techniques.

引用

页码：2761 / 2766

页数：6

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