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Updated: Jun 2, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)

Published on: November 22, 2016

Tris(4-methyl-phen-yl)phosphine selenide.

Alfred Muller¹

¹Research Centre in Synthesis and Catalysis, Department of Chemistry, University of Johannesburg (APK Campus), PO Box 524, Auckland Park, Johannesburg 2006, South Africa.

Acta Crystallographica. Section E, Structure Reports Online

|April 28, 2011

Summary

This study details the molecular structure of triphenylphosphine selenide (PSe(C(7)H(7))(3)), revealing a distorted tetrahedral geometry around the phosphorus atom. It also describes intermolecular interactions that form zigzag chains in the crystal structure.

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Area of Science:

Organometallic Chemistry
Crystallography
Molecular Structure

Background:

Triphenylphosphine selenide (P(C6H5)3Se) is an organophosphorus compound.
Previous structural data for this molecule was limited.

Purpose of the Study:

To elucidate the detailed molecular and crystal structure of triphenylphosphine selenide.
To characterize the bonding and intermolecular interactions within the crystal lattice.

Main Methods:

Single-crystal X-ray diffraction analysis was employed.
Geometrical parameters including bond lengths and angles were precisely determined.

Main Results:

The phosphorus atom exhibits a distorted tetrahedral PSeC3 environment.
A short P=Se bond length of 2.1119(5) Å was observed.
Intramolecular C-H⋯Se contacts and intermolecular C-H⋯Se interactions forming zigzag double chains were identified.

Conclusions:

The study provides comprehensive geometrical data for triphenylphosphine selenide.
The identified interactions offer insights into the supramolecular assembly of the compound in the solid state.