title: Bis(3-amino-pyrazine-2-carboxyl-ato-κN,O)diaqua-manganese(II).
abstract: The Mn(II) atom in the title compound, [Mn(C(5)H(4)N(3)O(2))(2)(H(2)O)(2)], exhibits an octa-hedral geometry comprising the two O atoms and two N atoms from two 3-amino-pyrazine-2-carboxyl-ate ligands, which act as chelating ligands, and two water mol-ecules. An intra-molecular N-H⋯O hydrogen bond occurs. In the crystal, N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds link adjacent mol-ecules into a three-dimensional network. The mol-ecule lies on a twofold rotation axis.
authors.affiliation: College of Chemistry & Chemical Engineering, Xianyang Normal University, Xianyang 712000, Shaanxi, People's Republic of China.
authors.forename: Min-Yan
authors.initials: MY
authors.lastname: Zheng
authors.forename: Yong-Sheng
authors.initials: YS
authors.lastname: Wei
authors.forename: Wei
authors.initials: W
authors.lastname: Geng
authors.forename: Guang
authors.initials: G
authors.lastname: Fan