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Abstract
Several transition metal chelates with 2-(1-pyridine-2-thionato)benzoxazole (PTBOX) and 2-(1-pyridine-2-thionato) benzothiazole (PTBTH) have been prepared and characterized. The ligands behave as a bidentate donors coordinating through the nitrogen atom of the benzoxazole or benzothiazole group and through the sulphur atom of the pyridine-2-thione moiety. The ligand field spectra and the magnetic moment values suggest an octahedral geometry for the bivalent metal complexes. The Au(III) complex is proposed to have a trigonal bipyramidal stereochemistry. A chlorine-bridged dimeric structure has been suggested for the trivalent metal complexes.