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- Title
Lithium Salts of 2,4,6-Triaryl-λ<sup>4</sup>-phosphinine Anions - A Comparison Study.
- Authors
Bruce, Marlene; Meissner, Gisa; Weber, Manuela; Wiecko, Jelena; Müller, Christian
- Abstract
The λ3-phosphinine derivatives 2,6-diphenyl-4-( p-tolyl)phosphinine and 2-(2′-pyridyl)-4,6-diphenylphosphinine were quantitatively converted into the corresponding λ4-phosphinine anions by reaction with phenyllithium. Systematic hydrolysis experiments with H2O and MeOH show that a subtle interplay between the p Ka values of the generated 1,2-dihydrophosphinine derivatives and the p Kb value of the formed bases, LiOH and LiOCH3, respectively, leads either to the kinetic or thermodynamic product. The coordination chemistry of the λ4-phosphinine anions towards RhI was further investigated, and the anions based on 2,6-diphenyl-4-( p-tolyl)-phosphinine and 2-(2′-pyridyl)-4,6-diphenylphosphinine demonstrate different coordination modes. Whereas the former coordinates in an η5 fashion towards the RhI atom, the latter acts as a bidentate chelating ligand with an η1 coordination to the metal center through the phosphorus lone pair.
- Subjects
PHOSPHORINE; ANIONS; ATOMS; LIGANDS (Chemistry); METALS
- Publication
European Journal of Inorganic Chemistry, 2014, Vol 2014, Issue 10, p1719
- ISSN
1434-1948
- Publication type
Article
- DOI
10.1002/ejic.201301259