Copper(I) and copper(II) complexes of the bidentate imidazole/thioether ligand 1-methyl-2-(methylthiomethyl)-1H-benzimidazole

被引：23

作者：

Albrecht, M ^{[1
]}

Hübler, K ^{[1
]}

Scheiring, T ^{[1
]}

Kaim, W ^{[1
]}

机构：

[1] Univ Stuttgart, Inst Anorgan Chem, D-70550 Stuttgart, Germany

来源：

INORGANICA CHIMICA ACTA | 1999年 / 287卷 / 02期

关键词：

crystal structures; EPR; copper complexes; imidazole complexes; thioether complexes;

D O I：

10.1016/S0020-1693(99)00018-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The mixed imidazole/thioether chelate ligand 1-methyl-2-(methylthiomethyl)-1 H-benzimidazole (mmb) which has been shown earlier to effect biomimicking valence tautomerism in copper/o-quinone systems forms crystallographically characterized chelate complexes [(eta(2)-mmb)Cu-I(PPh3)(2)](BF4) (1) and [(eta(2)-mmb)(2)Cu-II(eta(1)-ClO4)](ClO4) (2). Compound 1 contains copper(I) in an approximately tetrahedral environment and complex 2, obtained as methanol solvate, exhibits an asymmetrically (trigonal bipyramidal/square pyramidal) coordinated Cu-II center. Whereas bidentate mmb forms shorter N-Cu-II (1.945 Angstrom) than N-Cu-I bonds (2.040 Angstrom), the S(thioether)-Cu bond lengths of about 2.43 Angstrom are independent of the metal oxidation state. Two relatively simple ligands mmb can effect similar spectroscopic responses as more complicated multidentate ligands. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：204 / 208

页数：5

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