CRYSTAL AND MOLECULAR-STRUCTURE OF PENTA(4-METHYLBENZYL)TANTALUM, [TA(CH2C6H4-4ME)5]

被引：15

作者：

PIERSOL, CJ ^{[1
]}

PROFILET, RD ^{[1
]}

FANWICK, PE ^{[1
]}

ROTHWELL, IP ^{[1
]}

机构：

[1] PURDUE UNIV,DEPT CHEM,1393 BROWN BLDG,W LAFAYETTE,IN 47907

来源：

POLYHEDRON | 1993年 / 12卷 / 14期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0277-5387(00)84612-4

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reaction of the dichloride [TaCl2(CH2-C6H4-4Me)3] (1) (CH2-C6H4-4Me = 4-methylbenzyl) with the dialkylmagnesium compound [Mg(CH2-C6H4-4-Me)2] leads to the homoleptic 4-methylbenzyl compound [Ta(CH2-C6H4-4Me)5] (2). The solid state structure of 2 shows a distorted square-pyramidal geometry for the central TaC5 core. Four of the 4-methylbenzyl ligands are sigma-bound to the tantalum with Ta-CH2-C angles of 108.4(5)-125.7(5)-degrees, while the remaining ligand has an acute Ta-CH2-C angle of 90.4(5)-degrees. In solution all alkyl groups are equivalent by H-1 and C-13 NMR even at -60-degrees-C, indicating facile exchange of non-equivalent alkyl groups on the NMR time-scale.

引用

页码：1779 / 1783

页数：5

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