A novel two-dimensional 4f-3d coordination polymer Ce2Co3(EDTA)(3)(H2O)(11)center dot 12H(2)O

A novel two-dimensional 4f-3d heterometallic coordination polymer Ce2Co3(ED TA)(3) (H2O)(11). 12H(2)O (EDTA = ethylenediamine-N,N,N',N'-tetraacetate) h as been synthesized using complex Na[Ce(EDTA)] as ligand. The complex cryst allines in the space group C2, with lattice parameters a = 15.974(3) Angstr om, b 14.676(3) Angstrom, c = 14.773(3) Angstrom, beta = 116.39(3)degrees V = 3102.4(11) Angstrom (3), D-x = 1.858 g/m(3), Z = 2. It consists of a two -dimensional sheet in which the Ce(III) is ten-coordinated by six carboxyli c O atoms from three EDTA molecules and four O atoms of water molecules, fo rming a distorted bicapped square antiprism, and the Co(II) atom is seven-c oordinated by two N, four O atoms from one EDTA molecule and one O atom fro m the water molecule, giving rise to a monocapped trigonal prism. Each chel ated Co(II) atom is connected to two hydrated Ce(III) atoms through tridend ate bridging carboxylate groups, while each Ce(III) atom has three Co(II) a toms as neighbors. These sheets are linked into a three-dimensional network by the water molecules between layers through rich hydrogen bonds.