Nuclear magnetic resonance investigation of iminium ion intermediates. Part VI. A hydrogen-1 and carbon-13 structural and dynamic study of various substituted iminium salts
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 5,p. 536-541
- https://doi.org/10.1039/p29770000536
Abstract
1 H an 13C chemical shifts and 1J(13C–H) of various substituted iminium salts and parent compounds are presented and correlated with the substituent parameters σI and σR and the energies of electronic transitions λπ→π*. A 13C dynamic study shows that the rotation about the C–N bond is generally slow with respect to the n.m.r. time-scale and T1(13C) measurements are applied to a qualitative description of the molecular motion of iminium salts. The results are discussed in terms of ion-pair constitution.Keywords
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