TUNGSTEN-CONTAINING POLYHEDRAL OLIGOSILASESQUIOXANES - SYNTHESIS, STRUCTURE AND REACTIVITY OF (C-C6H11)7SI7O9(O3W[NME2]3)

被引：10

作者：

CHISHOLM, MH ^{[1
]}

BUDZICHOWSKI, TA ^{[1
]}

FEHER, FJ ^{[1
]}

ZILLER, JW ^{[1
]}

机构：

[1] UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717

来源：

POLYHEDRON | 1992年 / 11卷 / 13期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0277-5387(00)83709-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of the trisilanol (C-C6H11)7Si7O9(OH)3 (1) with an equimolar amount of W(NMe2)6 (2) produces the mixed amide/siloxide complex (c-C6H11)7 Si7O9(O3W[NMe2]3) (5). The solid state structure of 5, as determined by a single-crystal X-ray diffraction study, contains a slightly distorted fac-octahedral WN3O3 unit with relatively short W-N bonds [1.958(5) angstrom]. The silasesquioxane framework easily accommodates the size and steric demands of the W(NMe2)3 substrate with Si-O-W = 162.4(3)-degrees and W-0 = 1.947(4) angstrom. Despite the obtuse Si-O-W linkages there does not appear to be exceptionally strong pi-interactions between the oxygen atoms and the tungsten centre in this complex. Consistent with the steric bulk and poor electron donating capabilities of the siloxide ligand, complex 5 is relatively inert towards further protonolysis of the three remaining amide groups which are engaged in pi-bonding to the metal centre.

引用

页码：1575 / 1579

页数：5

共 17 条

[1]

BRADLEY DC, 1977, INORG CHEM, V16, P1794, DOI 10.1021/ic50173a044

[2] HEXAKIS(DIMETHYLAMIDO)TUNGSTEN(VI) [J].