title: Tetra-aqua-bis(3-carboxyl-atopyridine N-oxide-κO)cadmium(II).
abstract: In the title complex, [Cd(C(6)H(4)NO(3))(2)(H(2)O)(4)], the Cd(II) atom is situated on a crystallographic centre of inversion. The Cd(II) atom shows a slightly distorted octa-hedral geometry and is coordinated by four O atoms from water mol-ecules and two O atoms from deprotonated carboxyl groups of nicotinic acid N-oxide ligands. The mononuclear complex mol-ecules are linked by O-H⋯O hydrogen bonds, forming a three-dimensional network structure.
authors.affiliation: College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, People's Republic of China.
authors.forename: Chao-Yan
authors.initials: CY
authors.lastname: Zhang
authors.forename: Qian
authors.initials: Q
authors.lastname: Gao
authors.forename: Yue
authors.initials: Y
authors.lastname: Cui
authors.forename: Ya-Bo
authors.initials: YB
authors.lastname: Xie