(C2H10N2)[Co(H2O)6](HPO4)2: a supramolecular three-dimensional hydrogen-bonding network

The title compound, ethylenediammonium hexaaquacobalt bis(hydrogenphosphate), consists of [Co(H2O)6]2+ and [enH2]2+ cations (en is ethylenediamine), and [HPO4]2- anions interconnected by an extensive intermolecular three-dimensional hydrogen-bonding network. The [enH2]2+ cations play an important role in the templating effect. Both [Co(H2O)6]2+ cations are situated on inversion centers. The average Co-O and P-O bond distances are 2.075 (6) and 1.54 (2) A, respectively.