Some Low-valent Organometallic Complexes of Palladium(o), Platinum(o) and Rhodium(I)

P. G. Centre of Chemistry (M. U.), College of Commerce, Patna-800 020

Manuscript received 19 January 1992, revised 6 July 1992, accepted 25 August 1992

Some low-valent organometallic complexes of Pd⁰, Pt⁰ and Rh^I have been prepared and their tentative structure are assigned using various physicochemical data All Pd^O and Pt^O compounds are tetrahedral but compounds of Int have square planar configuration. Oxidation state of metals in these compounds are determined iodometrically. The ligand 3-(4 pyridyl) 4-phenyl-1,2,4-triazole-5-thione interacts with its thione tautomeric form with Pd^O and Pt^O, but both thione and thiol tautomeric form reacts with Rh¹ depending on the experimental conditions of the reaction. Metal-ligand vibrations in the far-infrared spectra of complexes have been reasonably assigned.