Benzene-1,3-diammonium bis-(pyridine-2,6-dicarboxyl-ato-κO,N,O)cobaltate(II) penta-hydrate.

In the title compound, (C(6)H(10)N(2))[Co(C(7)H(3)NO(4))(2)]·5H(2)O, the Co(II) ion is six-coordinated in an N(2)O(4) environment by two pyridine-2,6-dicarboxyl-ate (pydc) ligands, having a distorted octa-hedral geometry. The crystal packing is stabilized by inter-molecular N-H⋯O, O-H⋯O and weak C-H⋯O hydrogen bonds. There are also π-π inter-actions between the pyridine rings of the pydc ligands and between the pydc ligands and the benzene-1,3-diammonium cations, with centroid-centroid distances of 3.4575 (15) and 3.7521 (15) Å.

Benzene-1,3-diammonium bis-(pyridine-2,6-dicarboxyl-ato)nickelate(II) penta-hydrate.

In the title compound, (C(6)H(10)N(2))[Ni(C(7)H(3)NO(4))(2)]·5H(2)O, the Ni(II) ion is six-coordinated by two N and four O atoms from two pyridine-2,6-dicarboxyl-ate ligands in a distorted octa-hedral fashion. The crystal packing is stabilized by inter-molecular O-H⋯O and N-H⋯O and weak C-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid distances = 3.4669 (19) and 3.764 (2) Å].