A novel oxalato-bridged dinuclear copper(II) complex with diazamesocyclic terminal ligand: crystal structure, spectroscopy and magnetism

摘要

The synthesis of a new oxalato-bridged dinuclear Cu(II) complex, [Cu-2(DACO)(2)(mu-ox)Br-2].CH3OH (1), where DACO = 1,5-diazacyclooctane, together with its spectral and magnetic characterization, are reported. Crystal structure of I has been determined by X-ray diffraction analysis, which is made up of centrosymmetric dinuclear [Cu-2(DACO)(2)(mu-ox)Br-2] unit and noncoordinated methanol molecule, assembling into a novel two-dimensional step-like extended network through hydrogen bonds. The magnetic susceptibility indicates that complex I is anti-ferromagnetic coupling with 2J= -242 cm(-1). The strength of the exchange interaction is discussed on the basis of the structural feature. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 30]