Syntheses and crystal structures of two new complexes with 5-bromoisophthalate and bis(imidazole) ligands

Article abstract of DOI:10.1080/15533174.2011.609219

Two new complexes, [Cu(5-Br-ip)(biim-5)]_n (1) and [Ni(5-Brip)₂(biim-4)]_n (2) [ 5-Br-H₂ip=5- bromoisophthalate; biim-4=1,4- bis(imidazol)butane; biim-5 = 1,5-bis(imidazole)pentane], have been synthesized via hydrothermal reactions and characterized by elemental analysis and single-crystal x-ray analysis. Complex 1 belongs to the monoclinic system, P2(1)/c space group, a = 7.6055(19) A, b=25.860(6) A, c=10.075(3) A, β =96.585(3)°, F (000)=1028, R₁ = 0.0327, _wR₂ = 0.0820; Complex 2 belongs to the triclinic system, P-1 space group, a = 9.4766(12) A, b = 11.5781(14) A, c = 14.1063(17) A, a = 73.5900(10)°, β = 71.8470(10)°, ? = 74.337(2)°, F (000) = 736, R₁ = 0.0662,_wR₂ = 0.1626. In complex 1, the 5-Br-ip ligand takes the bidentate-bridging and bidentate-chelatingmodes to bridge the neighboring Cu(II) ions to yield a one-dimensional (1D) double chain with dinuclear Cu units. However, the 5-Br-ip ligand takes the bidentate- bridgingmodes to bridge the neighbouring Ni(II) ions to yield a 1D chain in complex 2. Both 1D chains in 1 and 2 are connected by biim-5 or biim-4 to form an infinite two-dimensional (2D) layer. Copyright Taylor & Francis Group, LLC.