One novel Cu(II)-amino acid Schiff base complex derived from salicylaldehyde and L-serine:: Identification of unusual monodentate 4,4′-bipyridine

One novel copper(II) complex [Cu(L)(4,4'-bipy)](ClO4) (1), (where L: tridentate Schiff base derived from salicylaldehyde and L-serine) has been synthesised and characterised by spectroscopic and electrochemical studies. The single-crystal structure of the complex was determined. The crystal structure features the presence of [Cu(L)(4,4'-bipy)](+) cations and ClO4- anions aggregated by hydrogen bonding. Here, 4,4'-bipyridine functions as a monodentate ligand, which appears to be an unusual phenomenon.