Bis(2,5-dihydroxy­benzoato-κO)bis­(1,10-phenathroline-κ(2) N,N′)cadmium(II) 1.25-hydrate

In the crystal structure of the title compound, [Cd(C(7)H(5)O(4))(2)(C(12)H(8)N(2))(2)]·1.25H(2)O, the Cd(2+) cation is coordinated by two phenanthroline (phen) mol­ecules and two 2,5-dihydroxy­benzoate (dhba) anions in a distorted octa­hedral geometry. The centroid–centroid distances of 3.809 (2) and 3.680 (2) Å between nearly parallel pyridine rings of the phen ligands and the benzene rings of dhba anions indicate that the dhba anions are involved in π–π stacking in the crystal structure. The face-to-face separation of 3.35 (3) Å between parallel phen ring systems also suggests π–π stacking between adjacent complex mol­ecules. The crystal structure contains extensive O—H⋯O and C—H⋯O hydrogen bonding.