Journal
INORGANICA CHIMICA ACTA
Volume 335, Issue -, Pages 1-6Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0020-1693(02)00753-3
Keywords
heterometallic complexes; crystal structures; magnetic properties; gadolinium-copper complexes
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A Cu(II)-Gd(III) heteronuclear complex with N,N'-ethylene-bis-5-methoxy salicylaldiimine (ems) as ligand has been synthesized. The complex crystallizes in the monoclinic system C2/c space group. The structure consists of two different discrete molecules: a mononuclear unit containing a single Cu(II) center, and a dinuclear one containing both a nine coordinated Gd(III) plus a four coordinated Cu(II) cation [CuGd(H2O)(NO3)(ems)]. The complex was characterized by magnetic susceptibility and electron paramagnetic resonance. The Cu(II)-Gd(III) complex presents a ferromagnetic interaction (J = 1.88 cm(-1)); its effective magnetic moment was found to increase with decreasing temperature. Both electronic and structural parameters are shown to influence the magnitude of the magnetic interaction. (C) 2002 Elsevier Science B.V. All rights reserved.
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