Synthesis, Properties and Crystal Structure of a Novel Coordinated Polymer:{（H2en）(H3O)[(BiPb（C2O4）4（H2O）2)]·2（H2O）}n

A novel oxalate compound {(H2en)(H3O)[BiPb(C2O4)4(H2O)2]?2(H2O)}n 1 (en = ethylenediamine) containing lead and bismuth has been synthesized by hydrothermal methods, and structurally characterized by X-ray single-crystal diffraction. It crystallizes in monoclinic, space group P21/c with a = 11.6160(1), b = 12.7426(1), c = 15.5683(5) ?, β = 108.442(4)o, BiPbC10N2O21H21, Mr = 921.46, V = 2186.0(4) ?3, Z = 4, Dc = 2.800 g/cm3, F(000) = 1712 and μ(MoKα) = 15.837 mm-1. The final R = 0.0502 and wR = 0.1261 for 3391 observed reflections with I > 2σ(I). The title com- pound consists of 2-D polyanions and protonized organic amine cations, and they are combined to each other by static attractive force and H-bonds to form the so-called organic-inorganic hybrid material.