Synthesis, crystal structure and magnetic behaviour of {[Co(dimb) 2(H2O)2] ·(NO3)2 · (H2O)2}n

Abstract

The title complex {[Co(dimb)2(H2O)2] · (NO3)2 · (H2O)2}n (1) (dimb = 1,3-di(imidazol-1-ylmethyl)-5-methylbenzene) has been hydrothermally synthesized by the reaction of dimb with Co(NO3)2· 6H2O in aqueous solution. The cobalt(II) atoms are linked by bridging dimb ligands to form 2D corrugated and wavy networks containing Co 4(dimb)4 macrocyclic motifs. Two neighboring independent layers interlinked each other in a parallel fashion to construct three-dimensional structure by O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds. Magnetic measurement shows the weak antiferromagnetic interaction with a one-dimensional chain model in the range of 5-300 K, with J of -0.68 cm-1. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.