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Updated: Apr 11, 2026
08:46
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
8.3K
Lead(II) nitrate and hexafluorosilicate complexes with neutral diphosphine coordination
Jennifer Burt1, William Grantham, William Levason
1School of Chemistry, University of Southampton, Southampton SO17 1BJ, UK. wxl@soton.ac.uk.
Dalton Transactions (Cambridge, England : 2003)
|June 3, 2015
Summary
This study reports new lead(II) phosphine complexes, detailing their structures and coordination chemistry. Researchers synthesized and characterized novel compounds, expanding the known examples of these rare lead complexes.
Area of Science:
- Coordination Chemistry
- Organometallic Chemistry
- Materials Science
Background:
- Lead(II) complexes with phosphine ligands are rare in scientific literature.
- Understanding the coordination behavior of lead(II) is crucial for developing new materials and catalysts.
- Diphosphine ligands offer unique chelating possibilities, influencing metal center geometry and reactivity.
Purpose of the Study:
- To synthesize and characterize novel phosphine complexes of lead(II).
- To elucidate the coordination modes and structural features of these complexes using X-ray crystallography.
- To explore the influence of different lead(II) salts and phosphine ligands on the resulting complex structures.
Main Methods:
- Synthesis of lead(II) complexes by reacting lead(II) salts (e.g., lead nitrate, lead hexafluorosilicate) with various diphosphine ligands (L-L) in aqueous/acetonitrile solutions.
- Isolation and purification of solid complexes.
- Structural determination of key complexes using X-ray diffraction analysis.
Main Results:
- Successfully synthesized and structurally characterized several rare lead(II) phosphine complexes, including [Pb(L-L)(NO3)2] and [Pb{o-C6H4(PMe2)2}(H2O)(SiF6)]·H2O.
- X-ray structures reveal diverse coordination geometries around the lead(II) center, ranging from eight-coordinate to ten-coordinate, influenced by chelating diphosphines, nitrate, hexafluorosilicate, and water ligands.
- Oxidation of phosphine ligands to phosphine dioxides led to the formation of polymeric structures and dimers with bridging ligands, altering the coordination environment.
Conclusions:
- This work significantly expands the known examples of lead(II) phosphine complexes.
- The coordination chemistry of lead(II) is highly adaptable, accommodating various ligands and forming diverse structural motifs, including polymers and dimers.
- The study highlights the importance of ligand structure and counterions in dictating the final coordination geometry and supramolecular assembly of lead(II) complexes.
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