Auxiliary Ligand Oriented Cd-II-flexible Dicarboxylic Acid Coordination Frameworks: Syntheses, Structures and Properties

Two different Cd-II coordination frameworks [Cd(L1)(L2)](infinity), (1) and [Cd(L1)(L3)(H2O)](infinity), (2) based on a flexible dicarboxylic acid ligand were obtained by introducing two different nitrogen heterocyclic auxiliary ligands (L1 = 3,3'-[1,3-benzenebis(carbonylimino)]bi(benzoate), L2 = 1,3-bi(4-pyridyl)propane, L3 = 4,4'-bipyridine). Complex 1 crystallizes in triclinic, space group P (1) over bar with a = 8.7415(5), b = 12.2247(7), c =16.2415(10) angstrom, beta = 95.6790(10)degrees, V = 1525.11(16) angstrom(3), D-c= 1.553 mg.m(-3), C35H28CdN4O6, M-r = 713.02, F(000) = 724, mu(MoK alpha) = 0.770 mm(-1), Z = 2, R/wR (I > 2 sigma(I))(alpha) = 0.0302/0.0773. However, complex 2 crystallizes in monoclinic, space group P2(1)/n with a = 11.4986(7), b = 23.0911(14), c = 11.9943(8) angstrom, beta = 115.9500(10)degrees, V = 2863.6(3) angstrom(3), D-c = 1.598 mg.m(-3), C32H24CdN4O7, Mr = 688.96, F(000) = 1392, mu(MoK alpha) = 0.820 mm(-1), Z = 4, R/wR (I > 2 sigma(I))(alpha) = 0.0283/0.0631. The structures of two complexes were characterized. Complexes 1 and 2 have different one-dimensional (1D) chain structures. In addition, we have also made a preliminary study on the properties of the two complexes.