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15N NMR chemical shifts of NH-pyrazoles in the solid state and in solution at low temperature

✍ Scribed by Francisco Aguilar-Parrilla; Ferdinand Männle; Hans-Heinrich Limbach; José Elguero; Nadine Jagerovic

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
332 KB
Volume
32
Category
Article
ISSN
0749-1581

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✦ Synopsis

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 the solid state and solution are due to the different intermolecular hydrogen bonds present in the various environments.

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