Hybrid structures formed by lead 1,3-cyclohexanedicarboxylates

Abstract

By the employment of hydrothermal methods, four lead 1,3-cyclohexanedicarboxylates with the compositions Pb(1,3-CHDC)(H₂O), I, [(OPb₄)₂(OH)₂(C₂O₄)(1,3-CHDC)₄]·H₂O, II, Pb₂(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 (Iⁿ, 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 (I¹O¹ and I²O⁰). III is a truly 3-D hybrid compound with I²O¹ type connectivity. IV has three-dimensional organic connectivity (O³) but no inorganic connectivity (I⁰). 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.