Tricarbonylrhenium(I) Complexes with N‐Heterocyclic Thiones and Selenols |
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| Authors: | Antje Meltzer Roberta Cargnelutti Adelheid Hagenbach Ernesto Schulz Lang Ulrich Abram |
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| Institution: | 1. Institute of Chemistry and Biochemistry, Freie Universit?t Berlin, Fabeckstrasse 34–36, 14195 Berlin, Germany;2. Departamento de Química, Laboratório de Materiais Inorganicos, Universidade Federal de Santa Maria, 97105–900 Santa Maria, RS, Brazil |
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| Abstract: | Reactions of (NEt4)2Re(CO)3Br3] with N‐heterocyclic thiols such as 2‐mercaptobenzimidazole (H2Sbenzim), 2‐mercaptothiazoline (HSthiaz), or 5‐mercapto‐1‐methyltetrazole (HSmetetraz) give rhenium(I) complexes of various compositions: (NEt4)Re(CO)3Br2(H2Sbenzim)], Re(CO)3(HSthiaz)3]Br, and (NEt4)Re2(CO)6(μ‐S‐Smetetraz‐κS)(μ‐N,S‐Smetetraz‐κS,N)2]. Corresponding reactions with 2‐mercaptopyridine (HSpy) and bis(2‐pyridine)diselenide (Sepy)2] did not give defined products in reasonable yields, whereas Re(CO)5Br] reacts with HSpy and (Sepy)2 with formation of Re(CO)3(HSpy)3]Br and Re2(CO)6(Sepy)2], respectively. All reactions were performed without the addition of a supporting base and the sulfur‐containing organic ligands are coordinated in their thione forms with the exception of Smetetraz– in its μS‐bridging coordination mode in (NEt4)Re2(CO)6(μ‐S‐Smetetraz‐κS)(μ‐N,S‐Smetetraz‐κS,N)2], which can be regarded as thiolate. The bonding mode of the selenium containing ligands in the dimeric compound Re2(CO)6(Sepy)2] (C–Se distance: 1.93 Å) can also best be described as selenolate. The products are stable on air at an ambient temperature. They were studied spectroscopically and by X‐ray diffraction. |
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| Keywords: | N‐Heterocyclic thiones Rhenium 2‐Pyridineselenolate Carbonyl complexes X‐ray structure |
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