catena-Poly[[[[3-(2-pyridyl)-1H-pyrazole]manganese(II)]-μ-oxalato] sesquihydrate]

In the title compound, {[Mn(C2O4)(C8H7N3)]center dot 1.5H(2)O}(n), the Mn-II ion is chelated by two O,O'-bidentate oxalate ions and an N,N'-bidentate 3-(2-pyridyl)pyrazole molecule, resulting in a distorted cis-MnN2O4 octahedral geometry for the metal ion. The bridging oxalate ions generate wave-like polymeric chains propagating in [001]. The packing is consolidated by N-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonds. One of the water O atoms lies on a crystallographic twofold axis.