Abstract
The title com-pound, {[Ni(C(12)H(14)O(4))(C(11)H(9)N(3)O)(H(2)O)]·H(2)O}(n), contains octa-hedrally coordinated Ni(II) ions ligated by adamantane-1,3-di-carboxyl-ate (adc) and N-(pyridin-3-yl)isonicotinamide (3-pina) ligands forming coordination polymer layers with a (4,4) grid topology. These diperiodic layer motifs aggregate in an AAA pattern mediated by supra-molecular C-H⋯O inter-actions to form the full triperiodic crystal structure of the title com-pound.