Thermal, structural and solution studies of a new lead(II) coordination polymer with η4 Pb–C interactions

A new Pb(II) one-dimensional coordination polymer {[Pb(PAA)2]n (1), PAA− = phenylacetate} was synthesized by the reaction of Pb(CH3COO)2 · 3H2O and ligand phenyl acetic acid. Compound 1 was structurally characterized by single-crystal X-ray diffraction. The crystal structure of this compound consists of one-dimensional polymeric units of [Pb(PAA)2] and the coordination number of PbII ions is six. The lead atoms have irregular coordination sphere containing stereo-chemically active lone pair and tetra-hapto (η4) interactions, thus attaining a total hapticity of 10 with environment C4O6Pb. The thermal stability of compound 1 was studied by thermal gravimetric (TG) and differential thermal analyses (DTA). The results of studies of the stoichiometry and formation of complex 1 in methanol, ethanol and acetonitrile solutions were found to be in support of their solid state stoichiometry.