Potential tridentate salicylaldehyde hydrazone of arylalkanoic acid coordinate to copper(II) acting as dinegative tetradentate ligands

Abstract

A chiral Schiff base N-( S)-2-(6-methoxylnaphthyl)-propanoyl- N′-(2-hydroxylbenzylidene)hydrazine ( H 2 L) has been synthesized. Reaction of H 2 L with Cu(OAc) 2 · H 2O led to the formation of a metal complex {[Cu L] · H 2O · 2DMF} ∞ ( 1). In complex 1, the potential dinegative tridentate L 2− ligand acting as tetradentate bridging ligand coordinate to two metal ions so as to form a novel infinite metal–organic coordination chain structure. The enantiomerically pure ligand H 2 L presents two different sets of signals in the 1H NMR spectrum either in chloroform solution or in dimethylsulfoxide solution, showing the presence of both ( E) and ( Z) isomers. The X-ray structural investigations of H 2 L revealed that it is the fully extended E-configuration in the solid state.