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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-(1 H -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-(1 H -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-(1 H -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-(1 H -pyrazol-3-yl)pyridine ligands leads to a three-dimensional network in the crystal structure.

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

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