A novel trinuclear nickel(II) phenanthroline suberato complex: {Ni[Ni(phen)(H2O)(4)](2)L-4/2}L center dot 4H(2)O (H2L = suberic acid)

摘要

The Reaction of freshly precipitated NiCO3 with phenanthroline and suberic acid in CH3OH/H2O at room temperature gave the title complex consisting of polymeric (1)(infinity){Ni[Ni(phen)(H2O)(4)](2)L-4/2}(2+) cationic chains, suberate anions and hydrogen bonded H2O molecules. The cationic chains are generated from bis-monodentate suberato ligands bridging the trinuclear {Ni[Ni(phen)(H2O)(4)](2)}(6+) groups, in which the central Ni atom is, via two mu-H2O molecules, coordinated to two monodentate cationic [Ni(phen)(H2O)(4)](2+) complex ligands at trans positions. The NiO6 octahedral coordination about the central Ni atom is elongated tetragonally distorted with d(Ni-O) = 2.033-2.166 Angstrom and the NiN2O4 octahedra about the side Ni atoms are significantly distorted with d(Ni-N) = 2.089, 2.099 Angstrom, d(Ni-O) = 2.046-2.117 Angstrom. The polymeric cationic chains are assembled via pi-pi stacking interactions into open 2D layers, between which the suberate anions and crystal H2O molecules are sandwiched. Crystal data: triclinic, P (1) over bar (no. 2), a = 11.397(2) Angstrom, b = 11.975(2) Angstrom, c = 12.500(2) Angstrom, alpha = 107.75(1)degrees, beta = 104.50(1)degrees, gamma = 109.68(1)degrees, Z = 1, R = 0.0521, wR(2) = 0.1249 for 3892 out of 6198 reflections with F-o(2) > 2sigma(F-o(2)). [References: 22]