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Kupferkomplexe des neuen Chelatliganden 1‐Methyl‐2‐(2‐thiophenolato)‐1 H ‐benzimidazol (mtpb) und dessen Oxidationsprodukten
Author(s) -
Stange Andreas,
Schurr Thilo,
Klein Axel,
Kaim Wolfgang
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400343
Subject(s) - copper , chemistry , acetonitrile , square pyramidal molecular geometry , crystallography , molecule , ligand (biochemistry) , sulfur , crystal structure , medicinal chemistry , stereochemistry , inorganic chemistry , organic chemistry , biochemistry , receptor
Copper Complexes of the New Chelate Ligand 1‐Methyl‐2‐(2‐thiophenolato)‐1 H ‐benzimidazole (mtpb) and of its Oxidation Products Anodic electrolysis of copper in acetonitrile in the presence of Hmtpb leads to formation of yellow [Cu 4 (mtbp) 4 ] which was crystallized as a dichloromethane solvate with two crystallographically independent cluster molecules in the unit cell. The copper(I) atoms exhibit slightly pyramidal S 2 N coordination with bridging thiolate sulfur atoms. The two clusters contain the four copper atoms arranged in a more (Cu1‐Cu4) or less (Cu5‐Cu8) distorted bisphenoidal arrangement. Reaction of mtpb — with Cu(ClO 4 ) 2 under anoxic conditions also produces [Cu 4 (mtpb) 4 ]. However, the admittance of O 2 in the reaction of mtpb — with copper(II) acetate in methanol causes oxidation of the sulfur atoms; a square‐pyramidal configurated copper(II) complex [Cu(CH 3 CO 2 ‐κ 2 O)(L 1 ‐κN)(L 2 ‐κN, O)] has been isolated and crystallographically characterized in which L 1 is the neutral sulfinic methyl ester and L 2 — is the sulfonate derived from mtpb — .