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

共 23 条

[1] SYNTHESIS, STRUCTURE, AND SPECTROSCOPIC PROPERTIES OF COPPER(II) COMPOUNDS CONTAINING NITROGEN SULFUR DONOR LIGANDS - THE CRYSTAL AND MOLECULAR-STRUCTURE OF AQUA[1,7-BIS(N-METHYLBENZIMIDAZOL-2'-YL)-2,6-DITHIAHEPTANE]COPPER(II) PERCHLORATE [J].

ADDISON, AW ;

RAO, TN ;

REEDIJK, J ;

VANRIJN, J ;

VERSCHOOR, GC .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1984, (07) :1349-1356

[2] Structures of the Cu(I) and Cu(II) forms of amine oxidases from x-ray absorption spectroscopy [J].

Dooley, DM ;

Scott, RA ;

Knowles, PF ;

Colangelo, CM ;

McGuirl, MA ;

Brown, DE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (11) :2599-2605

[3] A CU(I)-SEMIQUINONE STATE IN SUBSTRATE-REDUCED AMINE OXIDASES [J].

DOOLEY, DM ;

MCGUIRL, MA ;

BROWN, DE ;

TUROWSKI, PN ;

MCINTIRE, WS ;

KNOWLES, PF .

NATURE, 1991, 349 (6306) :262-264

[4] ELECTRONIC-STRUCTURE OF THE REDUCED BLUE COPPER ACTIVE-SITE - CONTRIBUTIONS TO REDUCTION POTENTIALS AND GEOMETRY [J].

GUCKERT, JA ;

LOWERY, MD ;

SOLOMON, EI .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1995, 117 (10) :2817-2844

[5] Mechanistic studies of aliphatic ligand hydroxylation of a copper complex by dioxygen: A model reaction for copper monooxygenases [J].

Itoh, S ;

Nakao, H ;

Berreau, LM ;

Kondo, T ;

Komatsu, M ;

Fukuzumi, S .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1998, 120 (12) :2890-2899

[6] Copper - A ''modern'' bioelement [J].

Kaim, W ;

Rall, J .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 1996, 35 (01) :43-60

[7]

KAIM W, 1994, BIOINORGANIC CHEM IN

[8] QUINOENZYMES IN BIOLOGY [J].

KLINMAN, JP ;

MU, D .

ANNUAL REVIEW OF BIOCHEMISTRY, 1994, 63 :299-344

[9] Crystal structure of a eukaryotic (pea seedling) copper-containing amine oxidase at 2.2 angstrom resolution [J].

Kumar, V ;

Dooley, DM ;

Freeman, HC ;

Guss, JM ;

Harvey, I ;

McGuirl, MA ;

Wilce, MCJ ;

Zubak, VM .

STRUCTURE, 1996, 4 (08) :943-955

[10] Synthesis and studies of Cu(II)-thiolato complexes: Bioinorganic perspectives [J].

Mandal, S ;

Das, G ;

Singh, R ;

Shukla, R ;

Bharadwaj, PK .

COORDINATION CHEMISTRY REVIEWS, 1997, 160 :191-235

← 1 2 3 →