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)(H(2)O), I, [(OPb(4))(2)(OH)(2)(C(2)O(4))(1,3-CHDC)(4)].H(2)O, II, Pb(2)(1,3-CHDC)(2)(H(2)O), III, and (OPb(3))(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 (I(1)O(1) and I(2)O(0). III is a truly 3-D hybrid compound with I(2)O(1) 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.