Synthesis, structure and electrochemical properties of some thiosemicarbazone complexes of ruthenium

Datta, S., Drew, M. G. B. and Bhattacharya, S. (2011) Synthesis, structure and electrochemical properties of some thiosemicarbazone complexes of ruthenium. Indian Journal of Chemistry Section A, 50 (9-10). pp. 1403-1409. ISSN 0975-0975

Abstract/Summary

Reaction of salicylaldehyde thiosemicarbazone (L-1), 2-hydroxyacetophenone thiosemicarbazone (L-2) and 2-hydroxynapthaldehyde thiosemicarbazone (L-3) with [Ru(dmso)(4)Cl-2] affords a family of three dimeric complexes (1), (2) and (3) respectively. Crystal structure of the complex (3) has been determined. In these complexes, each monomeric unit consists of one ruthenium center and two thiosemicarbazone ligands, one of which is coordinated to ruthenium as O,N,S-donor and the other as N,S-donor forming a five-membered chelate ring. Two such monomeric units remain bridged by the sulfur atoms of the O,N,S-coordinated thiosemicarbazones. Due to this sulfur bridging, the two ruthenium centers become so close to each other, that a ruthenium-ruthenium single bond is also formed. All the complexes are diamagnetic in the solid state and in dimethylsulfoxide solution show intense absorptions in the visible and ultraviolet region. Origin of these spectral transitions has been established from DFT calculations. Cyclic voltammetry on the complexes shows two irreversible ligand oxidations on the positive side of SCE and two irreversible ligand reductions on the negative side.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/30426
Item Type	Article
Refereed	Yes
Divisions	Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Uncontrolled Keywords	Coordination chemistry; Coordination modes; Thiosemicarbazones; Ruthenium
Publisher	National Institute of Science Communication and Information Resources, CSIR
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