Poly[[(μ(3)-adamantane-1,3-di-acetato)[μ-N-(pyridin-3-yl)isonicotinamide]-nickel(II)] monohydrate], a layered coordination polymer with triangular (3,6) topology.

The title compound, {[Ni(C(14)H(18)O(4))(C(11)H(9)N(3)O)]·H(2)O}(n), contains octa-hedrally coordinated Ni(II) ions ligated by 1,3-adamantanedi-acetato (ada) ligands and N-(pyridin-3-yl)isonicotinamide (3-pina) ligands, to form coordination polymer layers with a triangular (3,6) grid topology based on [Ni(2)(OCO)(2)] dimeric units. The diperiodic layer motifs stack in an ABAB pattern mediated by C-H⋯O supra-molecular inter-actions between ada ligands and water mol-ecules of crystallization to form the full triperiodic crystal structure of the title compound.