Tris(mercaptoimidazolyl)hydroborato complexes of cobalt and iron, [TmPh]2M (M = Fe, Co):: structural comparisons with their tris(pyrazolyl)hydroborato counterparts

被引：45
|
作者：
Kimblin, C [1 ]
Churchill, DG [1 ]
Bridgewater, BM [1 ]
Girard, JN [1 ]
Quarless, DA [1 ]
Parkin, G [1 ]
机构：
[1] Columbia Univ, Dept Chem, New York, NY 10027 USA
来源：
POLYHEDRON | 2001年 / 20卷 / 15-16期
基金：
美国国家卫生研究院;
关键词：
complexes of cobalt and iron; structural characterization; sandwich complexes;
D O I：
10.1016/S0277-5387(01)00780-X
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The ti is(mercaptophenylimidazolyl)borate iron and cobalt complexes [Tm-Ph](2)M (M = Fe, Co) have been synthesized by reaction of [Tm-Ph]T1 With MI2. Structural characterization by X-ray diffraction demonstrates that the potentially tridentate [Tm-Ph] ligand binds through only two sulfur donors in these 'sandwich' complexes and that the 'tetrahedral' metal centers supplement the bonding by interactions with the two B-H groups. Comparison of the structures of [Tm-Ph](2)M (M = Fe, Co) with the related tris(pyrazolyl)borate [Tp(Ph)](2)M counterparts indicates that the tris (mercaptoimidazolyl) ligand favors lower primary coordination numbers in divalent metal complexes. The trivalent complexes, {[Tp(Ph)](2)Fe}[ClO4] and {[pzBm(Me)](2)Co}I, however, exhibit octahedral coordination, with the ligands binding using their full complement of donor atoms. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1891 / 1896
页数：6
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