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Updated: Jun 1, 2026
08:46
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
N,N-Bis(diphenyl-phosphino)ethyl-amine.
Summary
Structural analysis of a novel organophosphorus compound reveals specific steric arrangements. The nitrogen atom adopts a planar geometry due to bulky phenyl and alkyl groups, influencing molecular conformation.
Area of Science:
- Organometallic Chemistry
- Crystallography
Background:
- Understanding the structure-property relationships in organophosphorus compounds is crucial for developing new materials and catalysts.
- The coordination environment around nitrogen atoms in phosphine ligands can significantly influence molecular geometry and reactivity.
Purpose of the Study:
- To elucidate the detailed molecular structure of the title compound, C(26)H(25)NP(2).
- To investigate the impact of steric and electronic factors on the geometry around the nitrogen and phosphorus atoms.
Main Methods:
- Single-crystal X-ray diffraction analysis was employed to determine the three-dimensional structure of the compound.
- Analysis of bond lengths, bond angles, and torsional angles provided insights into the molecular geometry.
Main Results:
- The diphenyl-phosphino groups exhibit a staggered conformation relative to the PNP backbone.
- The nitrogen atom displays an almost planar geometry, deviating from typical trigonal-pyramidal geometry, due to steric hindrance from phenyl and ethyl substituents.
- Bond angles around the nitrogen atom range from 114.0(1)° to 123.7(1)°, indicating significant distortion.
- No classical intermolecular interactions were observed in the crystal lattice.
Conclusions:
- The observed planarization of the nitrogen atom is a direct consequence of accommodating steric bulk within the molecule.
- The structural findings provide valuable data for computational modeling and understanding the reactivity of related organophosphorus compounds.
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