Dimeric Rhenium(I) Carbonyl Complexes with Thiosemicarbazone Backbone |
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Authors: | G Pereiras-Gabián E M Vázquez-López U Abram Prof Dr |
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Institution: | 1. Vigo/Spain, Institute of Inorganic Chemistry of the University;2. Freie Universität Berlin, Institut für Chemie, Fabeckstraße 34-36, D-14195 Berlin |
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Abstract: | Dimeric, neutral rhenium(I) complexes of the composition Re2(CO)6X(LR)] (X = Cl or Br) are formed when NEt4]2Re(CO)3Br3] or Re(CO)3Cl(CH3CN)2] react with 2, 2′-dipyridylketone thiosemicarbazones (HLR, R = H, Ph). The thiosemicarbazones deprotonate during the reaction and connect two tricarbonylrhenium(I) units as formally pentadentate bridging ligands. This results in an extremely rare coordination mode, in which the two nitrogen atoms of the hydrazone unit bind to each one of the rhenium atoms. The bond lengths inside the thiosemicarbazonato backbone reflect a large degree of delocalization of electron density. |
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Keywords: | Rhenium Carbonyls Thiosemicarbazones Structure analysis |
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