catena-Poly[[[bis(1,10-phenanthroline)cadmium(II)]-μ-naphthalene-2,6-dicarboxylato] monohydrate]

The title cadmium coordination polymer, {[Cd(C12H6O4)(C12H8N2)2]·H2O}n, has been synthesized and characterized by single-crystal X-ray diffraction. Each CdII cation is coordinated by two carboxyl­ate O atoms belonging to two NDC anions (NDC is naphthalene-2,6-dicarboxyl­ate) and four N atoms from two phen ligands (phen is 1,10-phenanthroline). Each NDC anion bridges two CdII cations through the two terminal carb­oxylate groups in a monodentate fashion to form a zigzag polymeric chain and there are π–π inter­actions between adjacent chains. The title coordination polymer exhibits an extended three-dimensional network feature based on inter­chain hydrogen bonding and and π–π stacking inter­actions.