Synthesis, crystal structures and magnetic studies of terephthalato- and fumarato-bridged dinickel(II) complexes with tripodal poly-benzimidazole ligand

Two novel dinuclear nickel(II) complexes [Ni2(ntb)2(μ-tp)(H2O)1.61(CH3OH)0.39](NO3)2·5.13CH3OH·2.25H2O (1) and [Ni2(ntb)2(μ-fum)(H2O)(CH3OH)](NO3)2·6CH3OH·H2O (2) were synthesized and characterized. Very weak antiferromagnetic interactions between the nickel(II) ions can be observed in the two complexes.