Abstract
A novel series of Ru(III) complexes with 5(-4′-derivatives phenyldiazo)-3-phenyl-2-thioxo-4-thiazolidinone (HL n) have been prepared. The ligands and structural composition of complexes were confirmed and characterized by various physico–chemical techniques. The spectral data were utilized to compute the important ligand field parameters B, β and Dq. The effect of Hamett's constant on the ligand field parameters is also discussed. The spectral and magnetic results commensurate an octahedral environment around the Ru(III) ion. The B-values suggest a strong covalency in the metal–ligand σ-bond and the Dq-values indicate a medium–strong ligand-field. IR spectra show that the ligand is neutral bidentate forming thereby a six-membered chelating ring and concomitant formation of an intramolecular hydrogen bond. The ligands are present in associated form in solution via intermolecular hydrogen bond and act as neutral bidentate coordinated to ruthenium(III).
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