The Synthesis Properties and Reactivity of Lewis Acidic Aminoboranes

16 March 2021, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


The evolution of frustrated Lewis pair chemistry has led to significant research into the development of new Lewis acidic boranes. Much of this has focused on modifying aryl substituents rather than introducing heteroatoms bound to boron. We recently reported unique Lewis acidic behaviour from bis(pentafluorophenyl)phenothiazylborane (1) for the heterolytic dehydrocoupling of stannanes. In this work, we synthesize and characterize a family of Lewis acidic aminoboranes and explored their reactivity with various Lewis bases as well as their efficacy as catalysts for stannane dehydrocoupling and hydrosilylation. Quantum chemical caluclations were undertaken to understand the origins of the Lewis acidity and the most Lewis acidic aminoborane (5) was found to be an effective catalyst even in coordinating solvents such as water or acetonitrile, suggesting the amino substituent provides a level of protection against competing donors.


Lewis acids
Computational Chemistry

Supplementary materials

SI - The Synthesis Properties and Reactivity of Lewis Acidic Aminoboranes


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