η6:η6 coordination of tetraphenylborate to ytterbium(II):: A new class of lanthanoid ansa-metallocenes

被引：23

作者：

Deacon, GB ^{[1
]}

Forsyth, CM ^{[1
]}

Junk, PC ^{[1
]}

机构：

[1] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2005年 / 05期

关键词：

metallocenes; ytterbium; tetraphenylborate; bis(trimethylsilyl)amide; pyrazolate;

D O I：

10.1002/ejic.200400953

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The ytterbium(II) complexes [Yb(tBu(2)pz)(THF)BPh4] (2) (tBu(2)pzH = 3,5-di-tert-butylpyrazole) and [Yb(N(SiMe3)(2))BPh4] (3) were synthesised by reaction of [Yb(N(SiMe3)2)(THF)BPh4] (1) with tBu(2)pzH or by in situ desolvation of the THF complex 1. X-ray analysis of 2 and 3 reveals eta(6):eta(6) binding of chelating BPh4- to ytterbium in both cases, generating true metallocene structures. Complex 3 is distinguished by a very short Yb-N bond and an agostic Yb-Me interaction, both indicative of a highly Lewis acidic metal centre. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005).

引用

页码：817 / 821

页数：5

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