CRYSTAL-STRUCTURE OF [LI(TMEN)2][LI(C(SIME3)3)2] - A MULTINUCLEAR MAGNETIC-RESONANCE STUDY OF TRIS(TRIMETHYLSILYL)METHYLLITHIUM TETRAHYDROFURAN(1/2) AND -N,N,N',N'-TETRAMETHYLETHYLENEDIAMINE (1/1) (TMEN)

被引：44

作者：

AVENT, AG ^{[1
]}

EABORN, C ^{[1
]}

HITCHCOCK, PB ^{[1
]}

LAWLESS, GA ^{[1
]}

LICKISS, PD ^{[1
]}

MALLIEN, M ^{[1
]}

SMITH, JD ^{[1
]}

WEBB, AD ^{[1
]}

WRACKMEYER, B ^{[1
]}

机构：

[1] UNIV BAYREUTH,ANORGAN CHEM LAB,W-8580 BAYREUTH,GERMANY

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1993年 / 21期

关键词：

D O I：

10.1039/dt9930003259

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A single-crystal X-ray study of (Me3Si)3CLi.tmen (tmen = N,N,N',N'-tetramethylethylenediamine) shows that it crystallises with the ionic structure [Li(tmen)2][Li{C(SiMe3)3}2] but that the anions pack with different orientations from those in crystalline [Li(thf)4][Li{C(SiMe3)3}2] (thf = tetrahydrofuran). The H-1, Li-7, C-13 and Si-29 NMR spectra of (MeSi)3CLi.2thf and (Me3Si)3CLi-tmen in thf and toluene, and Li-7, C-13 and Si-29 NMR spectra of the solids are described. Spectra obtained from solutions below ca. 25-degrees-C show the presence of ion pairs [Li(thf)4][Li{C(SiMe3)3}2] or [Li(tmen)2] [Li{C(SiMe3)3}2], together with further species which appear to be different in thf and toluene. Spectra from solutions at higher temperatures show inter-species exchange on the NMR timescale.

引用

页码：3259 / 3264

页数：6

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