title: Diammonium diaqua-bis(malonato-κO,O')cobaltate(II) dihydrate.
abstract: The title complex, (NH(4))(2)[Co(C(3)H(3)O(4))(2)(H(2)O)(2)]·2H(2)O, features a six-coordinate Co atom located on a center of symmetry. The octa-hedral O(6) coordination geometry is defined by two bidentate malonate ligands and two water mol-ecules, with the latter in a trans configuration. The mol-ecules are linked through O-H⋯O and N-H⋯O hydrogen-bonding inter-actions, forming a three-dimensional supra-molecular network.
authors.affiliation: Department of Chemistry, Huainan Normal College, 232001 Huainan, Anhui, People's Republic of China.
authors.forename: Haiyun
authors.initials: H
authors.lastname: Xu
authors.forename: Fengwu
authors.initials: F
authors.lastname: Wang