Synthesis, Properties, and Structural Characterization of Lead(II) Bis(Disphenylphosphinate), Pb(OP(C6H5)20)2.
Abstract
Pure polymeric Pb(OP(C6H5)2O)2 has been prepared, and its structure has been determined by three-dimensional single-crystal X-ray techniques. The compound crystallizes in the triclinic space group P(1 bar). Least squares refinement of 3737 independent reflections gave a final R factor of 3.5%. The structure consists of polymeric chains of lead atoms linked by double phosphinate bridges. The coordination around each lead atom can be described as a distorted trigonal bipyramid with a lone pair of electrons occupying an equatorial site. Mean equatorial and axial Pb-O distances are 2.233(6) and 2.435(6) A, respectively. The corresponding O-Pb-O angles are 88.2(2) and 167.6(2) degrees. This polymer was found to dissociate in solution, and its infrared spectrum suggests that changes in the mode of coordination of the phosphinate groups take place upon dissolution. Other forms including crystalline and amorphous modifications were found in the solid state.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1975
- Accession Number
- ADA020186
Entities
People
- H. D. Gillman
- P. Colamarino
- P. L. Orioli
- W. D. Benzinger