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NMR lineshapes of ammonium ions undergoing quantum mechanical tunnelling in the solid state at low temperatures

✍ Scribed by M.B. Dunn; R. Ikeda; C.A. McDowell

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
384 KB
Volume
16
Category
Article
ISSN
0009-2614

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15N NMR chemical shifts of NH-pyrazoles
15N NMR chemical shifts of NH-pyrazoles in the solid state and in solution at low temperature
✍ Francisco Aguilar-Parrilla; Ferdinand Männle; Hans-Heinrich Limbach; José Elguer 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 332 KB

## 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