title: Diaqua-bis[5-(2-pyrid-yl)-1H-tetra-zolato-κN,N]cobalt(II).
abstract: In the title compound, [Co(C(6)H(4)N(5))(2)(H(2)O)(2)], the Co atom is bonded to two water mol-ecules and two bidentate 5-(2-pyrid-yl)tetra-zolate ligands resulting in a slightly distorted octa-hedral CoN(4)O(2) coordination geometry. The Co(II) cation is situated on a crystallographic center of inversion. The asymmetric unit therefore comprises one-half of the mol-ecule. The four N atoms belonging to two bidentate 5-(2-pyrid-yl)tetra-zolate ligands lie in the equatorial plane and the two associated water mol-ecules are observed in the axial coordination sites. The crystal structure exhibits a three-dimensional supra-molecular network assembled by inter-molecular O-H⋯N hydrogen bonds.
authors.affiliation: School of Chemistry and Life Sciences, Harbin University, Harbin 150080, People's Republic of China.
authors.forename: Zhen-Hai
authors.initials: ZH
authors.lastname: Sun
authors.forename: Ling-Bo
authors.initials: LB
authors.lastname: Meng
authors.forename: Hua
authors.initials: H
authors.lastname: Lin