“…1H-Pyrazole and its 3,5-substituted derivatives have been widely used as bridging ligands in molecular magnetism and supramolecular chemistry for obtaining discrete oligonuclear complexes of high nuclearity and coordination polymers (Abdeljalil et al, 2006;Raptis et al, 1999;Warda, 1998). On the other hand, oxalate is an important polynucleative ligand as it can exhibit various bridging modes, which, together with the varied coordination preferences of metal ions, can result in the formation of oligonuclear species or compounds containing one-, two-and three-dimensional coordination polymers and frameworks (Castillo et al, 2001;Naumov et al, 1995;Bataille & Louër, 1999;Strotmeyer et al, 2003;Tomyn et al, 2007).…”