Hybrid structures formed by lead 1,3-cyclohexanedicarboxylates

By the employment of hydrothermal methods, four lead 1,3-cyclohexanedicarboxylates with the compositions Pb(1,3-CHDC)(H2O), I, [(Opb(4))(2)(OH)(2)(C2O4)(1,3-CHDC)(4)]center dot H2O, II Pb-2(1,3-CHDC)(2)(H2O), III, and (OPb3)(1,3-CHDC)(2), IV, have been prepared and characterized. Of these, I and II have layered structures while III and IV have three-dimensional structures. I-III are hybrid structures possessing extended inorganic connectivity in one or two-dimensions (I-n, n = 1 or 2) involving infinite Pb-O-Pb linkages along with zero or one-dimensional organic connectivity (O-m, m = 0 or 1). I contains two types of layers with different connectivities ((IO1)-O-1 and (IO0)-O-2). III is a truly 3-D hybrid compound with (IO1)-O-2 type connectivity. IV has three-dimensional organic connectivity (O-3) but no inorganic connectivity (I-0). The conformation of the CHDC anion is e,e in I-III and a,e in IV. In all these compounds, the lead atom has hemi- or holodirected coordination geometry.