Aqua­(4-nitro­phthalato-κO (1))bis­[2-(1H-pyrazol-3-yl-κN (2))pyridine-κN]­mangan­ese(II) hemihydrate

In the title compound, [Mn(C(8)H(3)NO(6))(C(8)H(7)N(3))(2)(H(2)O)]·0.5H(2)O, the Mn(2+) ion is octa­hedrally coordinated by two 2-(1H-pyrazol-3-yl)pyridine ligands, one 4-nitro­phthalate ligand and one coordinated water mol­ecule leading to an overall MnN(4)O(2) coordination environment. The two 2-(1H-pyrazol-3-yl)pyridine ligands, which deviate from planarity by 0.0187 (2) and 0.0601 (2) Å, make a dihedral angle of 81.90 (6)°. An intra­molecular N—H⋯O hydrogen bond occurs. Inter­molecular π–π stacking inter­actions with a face-to-face separation of 3.61 (1) Å between the 2-(1H-pyrazol-3-yl)pyridine ligands is observed. Additionally, O—H⋯O hydrogen bonding involving the uncoordinated water (which is situated on an inversion center), coordinated water mol­ecules and 2-(1H-pyrazol-3-yl)pyridine ligands leads to a three-dimensional network in the crystal structure.