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Updated: Jun 1, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of Phosphorus(I)
Published on: November 22, 2016
1,1,4,4-Tetra-methyl-piperazinediium dibromide
Minna Kärnä1, Manu Lahtinen, Jussi Valkonen
1University of Jyväskylä, Department of Chemistry, PO Box 35, FIN-40014 JY, Finland.
Abstract:
A small quantity of the title compound, C(8)H(20)N(2) (2+)·2Br(-), was formed as a by-product in a reaction between a diamine and an alkyl bromide. The asymmetric unit contains half of a centrosymmetric dication and a bromide anion. In the crystal, weak inter-molecular C-H⋯Br hydrogen bonds consolidate the crystal packing.
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