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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(09-10) [September-October 2011] >
| Title: | Synthesis, structure and electrochemical properties of some thiosemicarbazone complexes of ruthenium |
| Authors: | Datta, Sayanti
Drew, Michael G B
Bhattacharya, Samaresh |
| Keywords: | Coordination chemistry
Coordination modes
Thiosemicarbazones
Ruthenium |
| Issue Date: | Sep-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Reaction of salicylaldehyde
thiosemicarbazone (L1), 2-hydroxyacetophenone thiosemicarbazone (L2)
and 2-hydroxynapthaldehyde thiosemicarbazone (L3) with [Ru(dmso)4Cl2]
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. |
| Page(s): | 1403-1409 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.50A(09-10) [September-October 2011]
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