Chiral Schiff Base Ruthenium(II) Carbonyl Complexes: Synthesis, Characterization, Catalytic and Antibacterial Studies

Abstract

Chiral Schiff base ruthenium(II) carbonyl complexes of the type [Ru(CO)(L′)(B)] (L′= tetradentate Schiff bases; B=PPh₃, pyridine (py), piperidine (pip) or morpholine (morph)) has been synthesised by the reactions of [RuHCl(CO)(PPh₃)₂(B)] (B=PPh₃ or py or pip or morph) with appropriate Schiff bases having the donor groups (O,N) viz., bis[3(1′‐naphthyl)salicylidenecyclohexanediimine] (L1)  or bis[3(1′‐naphthyl)salicylidenepropylenediimine] (L2) or bis[3(1′‐naphthyl)salicylidenediphenyldiimine] (L3) in 1∶1 molar ratio. Complexes have been characterized by elemental analyses and spectral (IR, electronic, ¹H‐ and ³¹P‐NMR) data. An octahedral structure has been tentatively proposed for all the new complexes. The catalytic and antibacterial activities have also been carried out for these new complexes.

Keywords:

• chiral ligand
• ruthenium(II)
• deprotonation
• steric effect
• chelation