title: Tetra-aqua-bis-[2-(pyridin-4-yl-κN)pyrimidine-5-carboxyl-ato]zinc.
abstract: In the title complex, [Zn(C(10)H(6)N(3)O(2))(2)(H(2)O)(4)], the Zn(II) ion lies on an inversion center and is coordinated in a slightly distorted octa-hedral geometry by two N atoms from two 2-(pyridin-4-yl)pyrimidine-5-carboxyl-ate ligands and four water mol-ecules. In the symmetry-unique part of the mol-ecule, the pyridine and pyrimidine rings form a dihedral angle of 7.0 (1)°. In the crystal, the coordinating water mol-ecules act as donor groups and carboxyl-ate O atoms act as acceptors in O-H⋯O hydrogen bonds, forming a three-dimensional network.
authors.affiliation: Department of Chemistry, CICECO, University of Aveiro, 3810-193  Portugal.
authors.forename: Rupam
authors.initials: R
authors.lastname: Sen
authors.forename: Dasarath
authors.initials: D
authors.lastname: Mal
authors.forename: Paula
authors.initials: P
authors.lastname: Brandao
authors.forename: Zhi
authors.initials: Z
authors.lastname: Lin