Generation and structure of unique boriranyl radicals

John C. Walton*, Timothy R. McFadden, Dennis P. Curran*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
2 Downloads (Pure)

Abstract

Three-member ring boracyclopropanes (boriranes) with N-heterocyclic carbene substituents were prepared by a recently discovered route. H atoms were selectively abstracted from the boron atoms by t-butoxyl radicals and this enabled boriranyl radicals to be detected and characterized by EPR spectroscopy for the first time. Their EPR parameters indicated they had planar π-character. From competition experiments, the rate constant for H atom abstraction was determined and found to be about 2 orders of magnitude less than for NHC-boranes. The B–H BDE of an NHC-borirane was estimated to be about 95 kcal mol–1.
Original languageEnglish
Pages (from-to)16514-16517
JournalJournal of the American Chemical Society
Volume139
Issue number46
Early online date3 Nov 2017
DOIs
Publication statusPublished - 22 Nov 2017

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