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Updated: May 27, 2026
Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
The relative stabilities of cyclic dicationic derivatives of diphosphanes with three (3P) or four (4P) linked
Rachel Bashforth1, Alice J Boyall, Philippa K Coffer
1Chemistry Department, University of Durham, South Road, Durham, DH1 3LE, UK.
Abstract:
Reaction of a diphosphane with a chlorophosphane in the presence of SnCl(2) or AlCl(3) leads to the formation of dicationic heterocycles with three (3P) or four (4P) linked phosphorus atoms. Some 3P derivatives with small alkyl substituents may also be prepared by direct alkylation of cyclic triphosphenium ions. Several new species were prepared in solution, some of which were isolated and characterised by single-crystal X-ray diffraction. Investigations into the factors favouring formation of 3P or 4P species are described.
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