The magnetic exchange interaction via N-H···O-bonding in copper(II) complex with 1-phenyl-3-methyl-4-formylpyrazol-5-one 2-quinolylhydrazone

Abstract

The mononuclear copper(II) complex [CuL(CH3COO)], where L is monoanion of 1-phenyl-3-methyl-4-formylpyrazol-5-one 2-quinolylhydrazone has been synthesized. The weak intermolecular antiferromagnetic exchange interaction between copper(II) ions has been determined with the data of ESR spectroscopy and cryomagnetic measurements (2J = -3.25 cm 1). XRD data in combination with DFT calculations of exchange parameter within broken symmetry approach indicates that intermolecular exchange coupling is going through NH ··· O hydrogen bonds in centrosymmetric H-bonded dimers. © 2013 Elsevier B.V. All rights reserved.