Electron paramagnetic and nuclear magnetic resonance spectra of di-tert-butyliminoxy and di(1-adamantyl)iminoxy

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DOIResolve DOI: http://doi.org/10.1021/ja00840a036
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TypeArticle
Journal titleJournal of the American Chemical Society
ISSN0002-7863
Volume97
Issue7
Pages18171818; # of pages: 2
AbstractThe NMR spectrum of di-tert-butyliminoxy shows that all 18 protons are magnetically equivalent and yields +0.61 G for the electron-proton hyperfine coupling, aH. Positive spin density at the tert-butyl protons contrasts with the negative spin density found in di-tert-butyl nitroxide. The EPR spectrum of the iminoxy at temperatures of -50° and below can be analyzed in terms of two groups of nine protons having aH = +0.481 (probably the anti tert-butyl protons) and +0.772 G (probably the syn protons). At a temperature of 70°, the EPR spectrum can be analyzed in terms of 18 equivalent protons. At intermediate temperatures, theoretical EPR spectra calculated for mutual exchange of syn and anti tert-butyl groups did not fit the experimental spectra. The EPR and NMR spectra of di-(1-adamantyl)iminoxy are also reported.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21276694
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Record identifier2692a7c5-20bd-4ef5-a630-1e487e41d820
Record created2015-10-13
Record modified2016-05-09
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