Hyperfine coupling constants and angles of twist of phenyl and pentafluorophenyl substituted methyl radicals
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 70, 892-894
- https://doi.org/10.1039/f29747000892
Abstract
The ring proton hyperfine coupling constants of the benzyl, diphenylmethyl and triphenylmethyl radicals are compared with fluorine splittings in the corresponding perfluorophenyl radicals. Trends in the ratio of aF/aH are rationalised in terms of twisting of the phenyl rings; INDO calculations on model systems support this interpretation and suggest that a comparison of ring proton and fluorine hyperfine interactions, particularly at the meta positions, can provide useful stereochemical information.Keywords
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