Aqua(4-nitrophthalato-κO1)bis[2-(1H-pyrazol-3-yl-κN2)pyridine-κN]manganese(II) hemihydrate

In the title compound, [Mn(C8H3NO6)(C8H7N3)2(H2O)]·0.5H2O, the Mn2+ 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 MnN4O2 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