Bis(2-methoxybenzylammonium) diaqua-bis(dihydrogen diphosphato-kappa(2) O,O')-manganate(II) dihydrate

The asymmetric unit of the title compound, (C8H12NO)(2-)[Mn(H2P2O7)(2)(H2O)(2)]center dot 2H(2)O, consists of half an Mn-II complex anion, a 2-methoxybenylammonium cation and a solvent water molecule. The Mn-II complex anion lies across an inversion center, and has a slightly distorted octahedral coordination environment for the Mn-II ion, formed by two bidentate dihydrogendiphosphate ligands and two water molecules. In the crystal, the components are linked by O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds, forming layers parallel to (100). An intramolecular N-H center dot center dot center dot O hydrogen bond is also observed.