title: Tetra-aqua-bis[4-(4-pyrid-yl)pyrimidine-2-sulfonato]copper(II) dihydrate.
abstract: In the title complex, [Cu(C(9)H(6)N(3)O(3)S)(2)(H(2)O)(4)]·2H(2)O, the Cu(II) atom lies on an inversion centre and is coordinated by four water mol-ecules in equatorial positions and two N atoms from two 4-(4-pyrid-yl)pyrimidine-2-sulfonate ligands in apical positions. The asymmetric unit contains half of the complex and one free water mol-ecule. The water mol-ecules, including the uncoordinated water mol-ecules, and sulfonate O atoms are involved in O-H⋯O and O-H⋯N hydrogen-bonding inter-actions.
authors.affiliation: School of Chemistry and Chemical Engineering, Southeast University, Nanjing, People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Gang
authors.initials: G
authors.lastname: Xu
authors.forename: Hai-Bin
authors.initials: HB
authors.lastname: Zhu