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Halogenated triarylboranes: synthesis, properties and applications in catalysis
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Abstract
This review aims to look past tris(pentafluorophenyl)borane to its halogenated triarylborane siblings, to give a greater understanding as to how modification to their aryl rings can lead to improved reactivity.
Abstract
Halogenated triarylboranes (BAr 3) have been known for decades, however it has only been since the surge of interest in main group catalysis that their application as strong Lewis acid catalysts has been recognised. This review aims to look past the popular tris(pentafluorophenyl)borane [B(C 6F 5) 3] to the other halogenated triarylboranes, to give a greater breadth of understanding as to how tuning the Lewis acidity of BAr 3 by modifications of the aryl rings can lead to improved reactivity. In this review, a discussion on Lewis acidity determination of boranes is given, the synthesis of these boranes is discussed, and examples of how they are being used for catalysis and frustrated Lewis pair (FLP) chemistry are explained.
