A Multinuclear Magnetic Resonance Study of Intramolecular Hydrogen Bonding in Some Schiff and Schiff–Mannich Bases in Solution and in the Solid State
✍ Scribed by Wojciech Schilf; Bohdan Kamieñski; Anna Szady-Chelmieniecka; Eugeniusz Grech
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 86 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0926-2040
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## Abstract The proton transfer equilibrium in a series of double Schiff base derivatives of __trans__‐1,2‐diaminocyclohexane in solution and the solid state was studied by means of ^15^N NMR spectroscopy and analysis of the deuterium isotope effect on the chemical shifts Δ^15^N(D). The presence of
## Abstract ^13^C and ^1^H NMR spectra of six Schiff bases formed from 2‐hydroxy‐1‐naphthaldehyde and substituted anilines were measured and assigned in a variety of solvents. Based on the ^13^C chemical shifts and ^3^__J__(CH,NH), the ratio of the keto‐amine and phenol‐imine tautomers was derived