Cerium 3,5-Dinitrobenzoate Dihydrate
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In the crystal structure of the title molecule, catena-poly[[tetraaqua-1 kappa(2) O,2 kappa(2)O-tetrakis(mu-3, 5-dinitrobenzoato-O:O') dicerium]-bis(mu-3,5-dinitrobenzoato-O:O')], [Ce-2(C7H3N2O6)(6)(H2O)(4)], cerium ions are bridged by carboxylate groups to form linear polymeric chains. The coordination around Ce is eightfold involving six O atoms from six carboxylate groups and two water O atoms. Within the polymeric chains, only the bridging type of bonding exists. Ce-O distances vary between 2.400 (5) and 2.661 (5) Angstrom, resulting in a strongly distorted square-antiprism arrangement around Ce.