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Tricarbonylrhenium(I) Complexes with N ‐Heterocyclic Thiones and Selenols
Author(s) -
Meltzer Antje,
Cargnelutti Roberta,
Hagenbach Adelheid,
Schulz Lang Ernesto,
Abram Ulrich
Publication year - 2015
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.201500646
Subject(s) - chemistry , diselenide , rhenium , pyridine , sulfur , selenium , medicinal chemistry , base (topology) , stereochemistry , inorganic chemistry , organic chemistry , mathematical analysis , mathematics
Reactions of (NEt 4 ) 2 [Re(CO) 3 Br 3 ] with N ‐heterocyclic thiols such as 2‐mercaptobenzimidazole (H 2 Sbenzim), 2‐mercaptothiazoline (HSthiaz), or 5‐mercapto‐1‐methyltetrazole (HSmetetraz) give rhenium(I) complexes of various compositions: (NEt 4 )[Re(CO) 3 Br 2 (H 2 Sbenzim)], [Re(CO) 3 (HSthiaz) 3 ]Br, and (NEt 4 )[Re 2 (CO) 6 (μ‐ S ‐Smetetraz‐κ S )(μ‐ N,S ‐Smetetraz‐κ S,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) 5 Br] reacts with HSpy and (Sepy) 2 with formation of [Re(CO) 3 (HSpy) 3 ]Br and [Re 2 (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 μ S ‐bridging coordination mode in (NEt 4 )[Re 2 (CO) 6 (μ‐ S ‐Smetetraz‐κ S )(μ‐ N,S ‐Smetetraz‐κ S,N ) 2 ], which can be regarded as thiolate. The bonding mode of the selenium containing ligands in the dimeric compound [Re 2 (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.