Generation and chemistry of fluorinated acetoxyl and oxyallyl biradical anions (distonic radical anions) in the gas phase

TitleGeneration and chemistry of fluorinated acetoxyl and oxyallyl biradical anions (distonic radical anions) in the gas phase
Publication TypeJournal Article
Year of Publication1996
AuthorsM.L. Zhong, M.L. Chabinyc, and J.I. Brauman
JournalJOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume118
Pagination12432-12436
Date PublishedDEC 11
ISSN0002-7863
Abstract

Electron impact on fluorinated acetyl compounds RCOF(3) (R=OH, OSi(CH3)(3), OCH3, CF3COCH2, CH3COCH2, CH3, 3,5-(CF3)(2)C6H3CH2) in an FT-ICR spectrometer yields ionic products of m/z=[M-HF]. These products are proposed to arise via a two-step mechanism: upon electron impact the neutral precursor gives a fluoride ion-neutral radical complex followed by a secondary reaction of the fluoride anion with the neutral radical, either nucleophilic substitution or proton transfer, to yield a biradical anion (distonic radical anion). These radical anions were isolated and their chemical properties were studied. They undergo reactions characteristic of closed-shell anions, e.g. proton transfer, or characteristic of open-shell species, e.g. radical addition-elimination reactions.

DOI10.1021/ja960832q