title: Crystal structure of poly[di-aqua-(μ2-benzene-1,4-di-carboxyl-ato-κ(2) O (1):O (4))(μ2-benzene-1,4-di-carboxyl-ato-κ(4) O (1),O (1'):O (4),O (4'))bis-(μ2-3,3',5,5'-tetra-methyl-4,4'-bi-pyrazole-κ(2) N:N')dinickel(II)].
abstract: The asymmetric unit of the polymeric title compound, [Ni(C8H4O4)(C10H14N4)(H2O)] n , contains one Ni(2+) cation, one coordinating water mol-ecule, one 3,3',5,5'-tetra-methyl-4,4'-bi-pyrazole ligand and half each of two benzene-1,4-di-carboxyl-ate anions, the other halves being generated by inversion symmetry. The Ni(2+) cation exhibits an octa-hedral N2O4 coordination sphere defined by the O atoms of the water mol-ecule and two different anions and the N atoms of two symmetry-related N-heterocycles. The N-heterocycles and both anions bridge adjacent Ni(2+) cations into a three-dimensional network structure, with one of the anions in a bis-bidentate and the other in a bis-monodentate bridging mode. N-H⋯O and O-H⋯O hydrogen bonds between the N-heterocycles and water mol-ecules as donor groups and the carboxyl-ate O atoms as acceptor groups consolidate the crystal packing.
authors.affiliation: School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, Guangdong, People's Republic of China.
authors.forename: Chao
authors.initials: C
authors.lastname: Wu
authors.affiliation: School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, Guangdong, People's Republic of China.
authors.forename: Peng
authors.initials: P
authors.lastname: Cao
keywords: coordination polymer; crystal structure; hydrogen bonding; nickel