HETEROMETALLIC COMPLEXES OF MACROCYCLIC OXAMIDE WITH POLYCARBOXYLATES: SYNTHESES, CRYSTAL STRUCTURES, AND MAGNETIC PROPERTIES

摘要

Three complexes with the formula [Co(Ip)(CuL)(H_2O)_2] · H_2O (I), [Co(Ip)(NiL)(H_2O)_2] · H_2O (II), [Co(CuL)_2(Hbtc)(H_2O)](III), (H_2Ip = m-isophthalic acid; H_2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien; H_3Btc = 1,3,5-benzenetricarboxylic acid) were synthesized and structurally characterized by elemental analysis, IR and UV spectroscopy. Single-crystal X-ray analyses reveal that the complexes I and II contain neutral heterometallic binuclear CoM (for I and II, M = Cu, Ni, respectively) moieties, and complex III contains discrete neutral trinuclear CoCu_2 moieties. The structures of I-III consist of two-dimensional supramolecular architecture formed by strong O-H···O intermolecular hydrogen bonds. Furthermore, the magnetic properties of complex I were investigated and discussed in detail.