Syntheses, Crystal Structures, and Properties of Two Novel Coordination Polymers: [Zn2(5-iipa)2(bpa)3]n and [Cd(5-iipa)(bpa)(CH3OH)]n

Two novel coordination polymers based on 5-iodo-isophthalic acid (5-iipa) and ancillary nitrogen ligand 1,2-bis(4-pyridyl)athene (bpa), namely [Zn-2(5-iipa)(2)(bpa)(3)](n) (1) and [Cd (5-iipa)(bpa)(CH3OH)](n) (2), have been obtained and characterized by single-crystal X-ray diffraction, elemental analyses and thermal analyses. Compound 1 crystallizes in triclinic, space group P (1) over bar with a = 10.642(2) angstrom, b = 13.693(3) angstrom, c = 18.233(4) angstrom, alpha = 81.69(3)degrees, beta = 82.61(3)degrees, gamma = 76.50(3)degrees, and features an interesting three-fold parallel interpenetrated two-dimensional (2D)-> three-dimensional (3D) network motifs. Compound 2 crystallizes in triclinic, space group P (1) over bar with a = 7.7951(16) angstrom, b = 9.7463(19) angstrom, c = 12.128(2) angstrom, alpha = 97.41(3)degrees, beta = 97.53(3)degrees, gamma = 110.51(3)degrees. In 2, one-dimensional chains are linked by bpa ligands to give a 2D network, and such adjacent layers are united together to yield a 3D supramolecular structure through inter-layer pi center dot center dot center dot pi and weak O center dot center dot center dot I interaction.