Molecular structures and redox properties of oxorhenium(V) ‘3+1’ mixed ligand complexes with heterocyclic thiolates containing nitrogen |
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Authors: | Shubhamoy Chowdhury |
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Affiliation: | Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1-N1-34 O-okayama, Meguro-ku, Tokyo 152-8550, Japan |
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Abstract: | Reactions of chloro(3-thiapentane-1,5-dithiolato)oxorhenium(V) [ReO(SSS)Cl] with N-methyl-1H-imidazole-2-thiol (HL1) and 2-pyrimidinethiol (HL2) have been studied to form ‘3+1’ oxorhenium(V) complexes. In the absence of triethylamine, [Re(SSS)(HL1)]Cl (1a) was formed, while in the presence of triethylamine [Re(SSS)L1] (1b) and [Re(SSS)L2] (2) were produced. Molecular structures of complexes 1a and 2 were determined to be distorted square pyramidal by single crystal X-ray analytical method. From cyclic voltammetric studies, furthermore, it was proposed that complexes 1b and 2 are irreversibly oxidized to Re(VI) at around 0.84 and 1.01 V versus Ag/AgNO3, respectively, and are reduced to Re(IV) at −1.55 and −1.51 V with the dissociation of L1 or L2, followed by the quasi-reversible reductions to Re(III) at around −1.69 V, respectively. |
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Keywords: | Rhenium Redox Crystal structure Electrochemistry Mixed ligands |
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