SYNTHESIS, MOLECULAR-STRUCTURE AND SOLUTION DYNAMICS OF DIMERIC BENZAMIDINATES CONTAINING A DOUBLE DIAZAALLYL LITHIUM BRIDGE - A RAPID INTERCONVERSION OF SIGMA-BOND AND PI-BOND

被引：44

作者：

EISEN, MS

KAPON, M

机构：

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1994年 / 23期

关键词：

D O I：

10.1039/dt9940003507

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Dimeric Li[N(SiMe(3))(2)] reacted with the nitriles 4-XC(6)H(4)CN (X = H or Me) in diethyl ether-hexane (1:10) to yield dimeric complexes [4-XC(6)H(4)C(NSiMe(3))(2).Li(NCC(6)H(4)X-4)](2) (X = H 1 or Me 2). Complex 2 is dimeric in the solid state with two four-co-ordinated lithium cations bound in a N,N'-bidentate pi fashion to one amidine anion (chelating), forming-a double diazaallyl lithium bridge, in a monodentate a fashion to a nitrogen lone pair of a substrate molecule. and monodentate to a nitrogen lone pair of a second amidine anion. In solution, rapid interconversion of the different lithium-amidine bonds (sigma to pi and vice verse) was observed by means of the NMR chemical shifts.

引用

页码：3507 / 3510

页数：4

共 35 条

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