Synthesis and Crystal Structures of Two Cd(II) Coordination Polymers Assembled by 4-Carboxymethoxy-3-phenylacrylic Acid Ligands

Two Cd(II) complexes, [Cd(CMOPAA)(Phen)(H2O)](n) (1) and [Cd(CMOPAA)(Bipy)](n) (2), (H(2)CMOPAA = 4-carboxymethoxy-3-phenylacrylic acid, Phen = 1,10-phenanthroline and 2,2'-bipyridine = Bipy) were synthesized with 4-carboxymethoxy-3-phenylacrylic acid ligands by solvothermal condition and structurally characterized by element analysis, IR, TGA and single crystal X-ray diffraction. Complex 1 crystalizes in the monoclinic system, space group C2/c with a = 12.4609 (11) angstrom, b = 18.7973 (16) angstrom, c = 13.4544 (12) angstrom, beta = 99.732 (1)degrees, V = 3106.1 (5) angstrom(3). The asymmetric unit of complex 1 consists of one Cd(II) ion, one CMOPAA(2-) ligand, one Phen ligand and one H2O. Cd(II) ion is an eight-coordinated distorted dodecahedron geometry. Each CMOPAA(2-) ligand coordinates with two adjacent Cd(II) ions to form a one-dimensional chain. Complex 2 crystalizes in the triclinic system, space group P-1 with a = 9.407 (3) angstrom, b = 9.838 (3) angstrom, c = 11.792 (4) angstrom, alpha = 83.974 (4)degrees, beta = 78.392 (3)degrees, gamma = 67.019 (3)degrees, V = 983.7 (5) angstrom(3). The asymmetric unit of complex 2 consists of one Cd(II) ion, one CMOPAA(2-) ligand and one Bipy ligand. Cd(II) ion is a seven-coordinated twisted single-cap triangular prism configuration. The hexadentate bridging CMOPAA(2-) ligands coordinates with four adjacent Cd(II) ions to form a one-dimensional chain. The tetradentate bridging CMOPAA(2-) ligands link the neighboring one-dimensional chains to form a novel two-dimensional network structure. [GRAPHICS] .