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Updated: Dec 28, 2025

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
Design of non-ionic carbon superbases: second generation carbodiphosphoranes
Sebastian Ullrich1, Borislav Kovačević2, Björn Koch1
1Fachbereich Chemie , Philipps-University Marburg , Hans-Meerwein-Straße , 35032 Marburg , Germany .
Abstract:
A new generation of carbodiphosphoranes (CDPs), incorporating pyrrolidine, tetramethylguanidine, or tris(dimethylamino)phosphazene as substituents is introduced as the most powerful class of non-ionic carbon superbases on the basicity scale to date. The synthetic approach as well as NMR spectroscopic and structural characteristics in the free and protonated form are described. Investigation of basicity in solution and in the gas phase by experimental and theoretical means provides the to our knowledge first reported pK BH + values for CDPs in the literature and suggest them as upper tier superbases.
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