Transition metal complexes of guanidinate dianions:: Reactions between guanidines and M(NMe2)5 (M = Ta, Nb)

被引：68

作者：

Tin, MKT ^{[1
]}

Yap, GPA ^{[1
]}

Richeson, DS ^{[1
]}

机构：

[1] Univ Ottawa, Dept Chem, Ottawa, ON K1N 6N5, Canada

来源：

INORGANIC CHEMISTRY | 1998年 / 37卷 / 26期

关键词：

D O I：

10.1021/ic980736l

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The protonation of two metal-amido groups of M(NMe2)(5) with trialkylguanidines yielded a series of novel complexes with formulas [RNC(NR)NR]M(NMe2)(3) (1-4) (M = Ta, Nb; R = isopropyl, cyclohexyl). These complexes contained dianionic N,N',N " trialkylguanidinate ligands which were coordinated in a chelating bidentate mode. A single-crystal X-ray study of [CyNC(NCy)NCy]Ta(NMe2)(3) (3) (C25H51N6Ta, triclinic, P (1) over bar, a = 9.4155-(2) Angstrom, b = 13.3188(2) Angstrom, c = 13.5215(2) Angstrom, alpha = 117.075(1)degrees, beta = 101.744(1)degrees, gamma = 98.507(1)degrees, Z= 2) confirmed the connectivity of these species. These guanidinate ligands exhibited both planarity of the central CN3 group and the correct orientation of the three NR substituents to allow for pi conjugation within the ligand core.

引用

页码：6728 / 6730

页数：3

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