RUTHENIUM(II) CARBONYL-COMPLEXES CONTAINING TETRADENTATE SCHIFF-BASES

Ruthenium(II) carbonyl complexes of general formula [Ru(CO)(B)(L)] [wh ere B = PPh3, pyridine (py), piperidine (pip); L the dianionic tetrade ntate Schiff bases derived from the condensation of acetylacetone or b enzoylacetone with ethylenediamine, propylenediamine or trimethylenedi amine] have been synthesised by reacting [RuHCl(CO)(PPh3)(2)(B)] (B = PPh3, py or pip) with bis(acetylacetone)ethylenediimine, bis(acetylace tone)propylenediimine, bis(acetylacetone)trimethylenediimine, bis(benz oylacetone)ethylenediimine, bis(benzoylacetone)propylenediimine or bis (benzoylacetone)trimethylenediimine. The complexes were characterised on the basis of elemental analyses, i.r., electronic and H-1- and P-31 {H-1}-n.m.r. spectral studies.