Chemistry Letters, Vol.47, No.6, 773-775, 2018
Self-organized Tetranickel(II) Molecular Square with Imidazolinyl-imidazole Bridging Ligand
A novel square-planar cyclic tetranuclear nickel(II) complex coordinated by im-H(2)bizn(-) ligand (Him-H(2)bizn = 4,5-bis(4,5-dihydro-1H-imidazol-2-yl)imidazole), [Ni-4(II)(im-H(2)bizn)(4)(MeOH)(4)(PY)(4)](ClO4)(4)center dot 2ether (py = pyridine), has been synthesized. The tetranickel(II) complex crystallized in C2/m space group and exhibited antiferromagnetic intramolecular coupling with J = -24 K. The complex arrests ClO4- ion by moderate O-H center dot center dot center dot O and weak multipoint C-H center dot center dot center dot O hydrogen bonds.