| Abstract: | Two coordination polymers, namely, two-dimensional complex 1 {[Cu(μ-L)1.5(ClO4)2(H2O)]·(H2O)0.5}n (L = pyrazine-1,4-dioxide) and one-dimensional complex 2[Co(μ-L)Br2(H2O)2]n, have been synthesized with pyrazine-1,4-dioxide as bridging ligands, and their crystal structures were determined by X-ray crystallography. Crystal data for complex 1:monoclinic system, space group C2/c, with a = 23.310(3), b = 12.2338(17), c = 10.6075(15) (A),β=110.487(2)°, V = 2833.6(7)(A)3, Z = 8, C6H9Cl2CuN3O12.5, Mr = 457.60, Dc = 2.145 g/cm3, F(000) =1832 and μ= 1.998 mm-1; and those for 2: monoclinic system, space group C2/c, with a =11.012(3), b = 7.483(2), c = 11.451(3) (A), β = 101.654(4)°, V = 924.2(4) (A)3, Z = 4,C4H8Br2CoN2O4, Mr = 366.87, Dc = 2.637 g/cm3, F(000) = 700 and μ = 10.487 mm-1. 1 shows a two-dimensional sheet structure on the ac plane through the coordination of μ-L bridging ligands with Cu(Ⅱ) ions, while 2 displays a zigzag one-dimensional chain along the c axis via the coordination of μ-L bridging ligand with Co(Ⅱ) ions. Hydrogen bonds in 1 and 2 make the sheets (or chains) connect each other to form a three-dimensional structure. |
