Hydrothermal Synthesis and Crystal Structure of One 3D Coordination Polymer of Cobalt(II) Achieved f

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A new three-dimensional coordination polymer {[Co(BPTC)_(0.5)(bix)]·(H_2O)}_n (1, H4BPTC = 1,1′-biphenyl-2,2′,6,6′-tetracarboxylic acid, bix = 1,3-bis(imidazol-1-ylmethyl)-benzene) has been synthesized by the hydrothermal method and characterized by IR, elemental analysis, and single-crystal X-ray analysis. The crystal is of orthorhombic, space group Pbcn with a = 13.2975(10), b = 13.8424(12), c = 22.6367(17), CoC_(22)H_(19)N_4O_5, M_r = 478.34, V = 4166.7(6) ~3, D_c = 1.525 g/cm~3, F(000) = 1968, μ = 0.867 mm~(-1), S = 1.023 and Z = 8. The final R = 0.0683 and wR = 0.1529 for 3655 observed reflections with I > 2σ(I). In the title complex, the 2D Co-BPTC layer is formed through self-assembly of Co(II) ions and bridging BPTC~(4-) ligands in a molar ratio of 2:1. The metal-organic lattice layers are further united together through the second bridging ligand bix to form a 3D metal-organic framework. The thermal stability of the title complex was studied by thermal gravimetric (TG) and differential thermal analysis (DTA). A new three-dimensional coordination polymer {[Co (BPTC) _ (0.5) (bix)] · (H_2O)} _ n (1, H4BPTC = 1,1’-biphenyl- 2,2 ’, 6,6’-tetracarboxylic acid, bix = 1,3-bis (imidazol-1-ylmethyl) -benzene) has been synthesized by the hydrothermal method and characterized by IR, elemental analysis, and single-crystal X- ray analysis. The crystal is of orthorhombic, space group Pbcn with a = 13.2975 (10) b = 13.8424 (12) c = 22.6367 (17)  CoC 22 H 19 N 4 O 5 M_r = 478.34 V = 4166.7 6 ~ 3 D_c = 1.525 g / cm ~ 3, F (000) = 1968, μ = 0.867 mm -1, S = 1.023 and Z = 8. The final R = 0.0683 and wR = 0.1529 for 3655 at reflections with I> 2σ (I). In the title complex, the 2D Co-BPTC layer is formed through a self-assembly of Co (II) ions and bridging BPTC4- ligands in a molar ratio of 2: layers are further united together through the second bridging ligand bix to form a 3D metal-organic framework. The thermal stability of the title complex was studied by thermal gravimetr ic (TG) and differential thermal analysis (DTA).
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