SYNTHESIS OF NEW BIS(TRIMETHYLSILYLCYCLOPENTADIENYL) COMPLEXES OF HAFNIUM

被引：6

作者：

HOKE, JB

STERN, EW

机构：

[1] Engelhard Corporation, Menlo Park, Edison, NJ 08818

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1991年 / 412卷 / 1-2期

关键词：

D O I：

10.1016/0022-328X(91)86044-Q

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The new trimethylsilylcyclopentadienyl hafnocene complexes, (Me3SiCp)2Hf(Cl)(BH4), (Me3SiCp)2Hf(H)(BH4), (Me3SiCp)2HfMe2, (Me3SiCp)2Hf(OR)2 (R = Me and Et), and (Me3SiCp)2Hf(Cl) (OMe), have been prepared in good yield from the reactions of (Me3SiCp)2HfCl2 with LiBH4, MeLi, Et3N/ROH (R = Me and Et), or NaOMe. All were isolated as volatile, low melting solids or oils. In the reaction of (Me3SiCp)2HfCl2 with LiBH4 in hexane, either the borohydride-chloride complex, (Me3SiCp)2Hf(Cl)(BH4) or the borohydride-hydride complex, (Me3SiCp)2Hf(H)(BH4), was isolated depending on the reaction temperature. Although the expected bis(borohydride) complex, (Me3SiCp)2Hf(BH4)2, was not obtained, B-11 NMR spectroscopy suggests that it may be formed as an intermediate which subsequently loses BH3 to form (Me3SiCp)2Hf(H)(BH4).

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页码：77 / 84

页数：8

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