## Abstract The ^15^N chemical shifts of thirteen NH‐pyrazoles in the solid state and of seven NH‐pyrazoles in [^2^H~8~] THF solution at 170–175 K (with frozen annular tautomerism) are reported. The solid‐state values are discussed using an additive model. The differences in chemical shifts between
13C and 15N NMR chemical shifts of 1-(2′,4′-dinitrophenyl) and 1-(2′,4′,6′-trinitrophenyl) pyrazoles in the solid state and in solution
✍ Scribed by M. Ángeles García; Rosa M. Claramunt; José Elguero
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 107 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.2219
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✦ Synopsis
Abstract
The ^13^C and ^15^N CPMAS NMR spectra of 18 pyrazoles substituted at position 1 by dinitrophenyl and trinitrophenyl (picryl) groups have been recorded. To help in the assignments, some of these compounds were studied in DMSO‐d~6~ solution. Phenomena such as the conformation of the N‐aryl groups and broadening of splittings due to quadrupolar nuclei are discussed. Copyright © 2008 John Wiley & Sons, Ltd.
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