15N chemical shifts as a conformational probe in enaminones A variable temperature study at natural isotope abundance
- 1 December 1981
- journal article
- other
- Published by Wiley in Magnetic Resonance in Chemistry
- Vol. 17 (4) , 306-310
- https://doi.org/10.1002/mrc.1270170418
Abstract
The high sensitivity of 15N shielding to the displacement of the lone pair electrons makes it a useful conformational probe for remote parts of a conjugated molecule. Thus, the chemical shifts are observed for different rotamers of enaminones in the slow exchange limit. The interpretation of the 15N chemical shifts in terms of the non‐planarity of the E, s‐E rotamers is in accord with 13C chemical shifts and 1J(CH) coupling constants.Keywords
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