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Updated: Mar 18, 2026
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
PCl3-C6H6 heterodimers: evidence for Pπ phosphorus bonding at low temperatures
N Ramanathan1, K Sankaran, K Sundararajan
1Chemistry Group, Indira Gandhi Center for Atomic Research, Kalpakkam - 603102, Tamil Nadu, India. sundar@igcar.gov.in.
Abstract:
A phosphorous trichloride (PCl3)-benzene (C6H6) heterodimer was generated in a low temperature N2 matrix and was characterized using infrared spectroscopy. The structure of the heterodimer produced in the matrix isolation experiment was discerned through ab initio computations. Computations disclosed that the experimentally detected dimer is stabilized through strong non-covalent phosphorus bonded Pπ interaction, considered as a class of pnicogen bonding. This experimentally unmapped Pπ interaction so far has been reconnoitered using atoms in molecules and natural bond orbital and energy decomposition analyses. The influence of substitutions on both the PCl3 and C6H6 monomeric units of the heterodimer was subsequently examined to understand the strength of Pπ interaction as a result of these substitutions.
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