The synthesis and characterization of several Hexa -coordinated Ru(III) complexes of the type [RuCl(CO) (EPh 3 ) 2 (L)] (E = P or As ; L = monobasic bidentate anion) were reported. FTIR, Electronic, EPR, electrochemistry and catalytic activity of the complexes were discussed. An octahedral geometry has been tentatively proposed for all these complexes. The new complexes have been subjected to antimicrobial investigations are also discussed.