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A new heteropolyoxotungstate [(C2H4N2)4(P4Co3W4O28H6)(H2C2O4)]n with a three-dimensional framework was hydrothermally synthesized.The compound crystallizes in a tetragonal system,space group I41/a with a = 17.1006(17),b = 17.1006(7),c = 10.7525(5),V = 3144.2(2)3,Z = 4,Dc = 3.795 g·cm-3,F(000) = 3300,MoKα(λ = 0.71073 ),μ = 16.460 mm-1,the final R = 0.0335 and wR = 0.0776.In the heteropolyoxotungstate,tungsten-oxygen octahedra are linked by sharing two cis-vertexes into an infinite helical chain extending along the c axis.Cobalt atoms in the octahedral geometry act as the linkers of these chains,forming a three-dimensional framework.The cobalt and phosphorus atoms in the tetrahedral geometry play a role in stabilizing the three-dimensional framework.Ethylenediamine molecules are polymerized into organic chains which locate in the interspaces of the framework in the way of interwinding with the W-O chains.
A new heteropolyoxotungstate [(C2H4N2) 4 (P4Co3W4O28H6) (H2C2O4)] n with a three-dimensional framework was hydrothermally synthesized. The compound crystallizes in a tetragonal system, space group I41 / a with a = 17.1006 (17), b = 17.1006 V = 3144.2 (2) 3, Z = 4, Dc = 3.795 g · cm-3, F (000) = 3300, MoKα (λ = 0.71073 ), μ = 16.460 mm-1, the final R = 0.0335 and wR = 0.0776.In the heteropolyoxotungstate, tungsten-oxygen octahedra are linked by sharing two cis-vertexes into an infinite helical chain extending along the c axis. Cobalt atoms in the octahedral geometry act as the linkers of these chains, forming a three-dimensional framework.The cobalt and phosphorus atoms in the tetrahedral geometry play a role in stabilizing the three-dimensional framework. Ethylenediamine molecules are polymerized into organic chains which locate in the interspaces of the framework in the way of interwinding with the WO chains