Synthesis and Crystal Structure of A New Co(II) Coordination Polymer With a Rare Two-Fold bbg Topology

A new Co (II) coordination polymer with 1,3-di(3,5-dicarboxylphenyl) benzene (H(4)ddb) and 1,4-bis(imidazol-1-yl) benzene (bib) has been prepared by hydrothermal synthesis and characterized by single-crystal X-ray diffraction, IR, and EA. Complex, [Co-2(ddb) (bib)(2) (H2O)(2)](n) (1), is monoclinic, space group C2/c with a = 25.903 (5), b = 10.316 (5), c = 19.680 (5) angstrom, beta = 128.191(5)degrees, V = 4133 (2) angstrom(3), Z = 8, Mr = 487.33, D-c = 1.566 g/cm(3), F(000) = 1992, and mu = 0.88 mm(1). The final refinement gave R = 0.0326 and wR = 0.0781 for 3716 reflections with I > 2 sigma(I). X-ray diffraction analysis reveals that the complex 1 displays a two-fold three-dimensional structure with (4,4)-connected bbg topology.