Synthesis, crystal structure and magnetic properties of a new oxalato-bridged binuclear copper(II) complex with a tridentate Schiff base ligand

A new oxalato-bridged binuclear copper(II) complex, [{Cu(L)}(2)OX] (1) (L=2 -N-(2 ' -pyridylimine)benzoic acid) has been synthesised and characterised by ESR and IR spectra and variable temperature magnetic susceptibility meas urements. The single crystal X-ray diffraction reveals that, both the coppe r(II) ions have distorted square pyramidal geometry with the coordination o f the tridentate Schiff base ligand and the oxalate group. The copper(H) ce ntres are separated by 5.4 A and antiferromagnetically coupled with a singl et-triplet separation of -12.4 cm(-1). (C) 2001 Elsevier Science Ltd. All r ights reserved.