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Updated: Jan 11, 2026

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI
Published on: November 22, 2016
Ga/P-Based Ambiphilic Chelates and Their Reactivities with Main Group Elements
Qiannan Wu1, Ludwig Zapf1, Michael J Ferguson1
1Department of Chemistry, University of Alberta, 11227 Saskatchewan Dr., Edmonton, Alberta T6G 2G2, Canada.
None:
The synthesis of two ambiphilic Ga/P-containing frustrated Lewis pairs (FLPs) [iPr2P(C6H4)GaMes2] (PGaMes2, 1, Mes = 2,4,6-Me3C6H2) and [{iPr2P(C6H4)}2GaMes] (P2GaMes, 2) is reported. Motivated by the possibly higher degrees of Lewis acidity at the Ga centers in 1 and 2 compared to known-boron based chelates, these new Ga/P FLPs were reacted with soft main group elements, such as Te, as well as exploration of their ability to coordinate the parent aminoborane H2B-NH2 (generated via the dehydrogenation of H3B·NH3). In contrast to the known/stable chelate [iPr2P(C6H4)BCy2{H2BNH2}] (Cy = cyclohexyl), the corresponding Ga/P adduct [P2GaMes{H2BNH2}] (8) is unstable and releases B-N units such as borazine [HBNH]3 over time, which is partially attributed to a hard-soft acid-base mismatch between N and Ga.
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