Donor Properties of a Free-Radical Base

Yau Yan Lim, Russell S. Drago

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)


Enthalpies of adduct formation of 2,2,6,6-tetramethylpiperidine-N-oxyl have been investigated with various hydrogen-bonding acids. The enthalpies and frequency shifts are compared with results from previously reported correlations. The nitrogen hyperfine coupling constant is found to increase regularly with the enthalpy of adduct formation. The donor orbital in the molecule is identified and a model is proposed to account for the increase in AN with-ΔH. The nmr isotropic shift of the alcohol proton is measured. The difficulties associated with interpreting this shift are presented.

Original languageEnglish
Pages (from-to)891-894
Number of pages4
JournalJournal of the American Chemical Society
Issue number4
Publication statusPublished - 1 Feb 1971
Externally publishedYes

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