title: A new cobalt(II) complex with 5-(4-pyrid-yl)tetra-zole ligands.
abstract: A new mononuclear cobalt(II) complex, tetra-aqua-bis[5-(4-pyrid-yl)tetra-zolido-κN(5)]cobalt(II) dihydrate, [Co(C(6)H(4)N(5))(2)(H(2)O)(4)]·2H(2)O, has been synthesized and structurally characterized. The Co(II) atom is coordinated by two N atoms from 5-(4-pyrid-yl)tetra-zole ligands (L), as well as four O atoms from coordinated water mol-ecules. The mol-ecule is centrosymmetric, with pairs of equivalent ligands lying trans to each other in a slightly distorted octa-hedral coordination geometry. A prominent feature of the complex is the formation of a three-dimensional supra-molecular network via O-H⋯O and O-H⋯N hydrogen bonds.
authors.forename: Wei-Feng
authors.initials: WF
authors.lastname: Zhu
authors.forename: Xing-Fen
authors.initials: XF
authors.lastname: Zhou