Structure and magnetism of novel dinuclear cobalt(II) complexes

摘要

Two dinuclear cobalt(II) complexes of the formula [CO2X4(isonia)(4)] have been synthesized and structurally characterized; isonia is unidentate neutral iso-nicotinamide and X are furan-3- or furan-2-carboxylate ligands. The chromophore [CoO4N2} is formed of two iso-nicotinamide ligands and three furancarboxylate ligands where two of them bear a bridging function and one is a terminal-bidentate ligand. The magnetic data confirm a weak exchange interaction (J / hc = -2 cm(-1)) and a high single-ion zero-field splitting (D / hc = 63 and 33 cm(-1), respectively). (C) 2015 Elsevier B.V. All rights reserved.