N-Aminoazoles. Part 3. Molecular structure and multinuclear NMR study of 1,3-diaminobenzimidazolium chloride hydrate and 1-amino-3-methylbenzimidazolium iodide
✍ Scribed by Pozharskii, Alexander F.; Kuz'menko, Valery V.; Foces-Foces, Concepci�n; Llamas-Saiz, Antonio L.; Claramunt, Rosa M.; Sanz, Dionisia; Elguero, Jos�
- Book ID
- 121318115
- Publisher
- Royal Society of Chemistry
- Year
- 1994
- Tongue
- English
- Weight
- 617 KB
- Volume
- 4
- Category
- Article
- ISSN
- 1472-779X
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## Abstract Seventeen __N__‐substituted 3,4‐dihydro‐2__H__‐1,3‐benzoxazines [__N__‐substituent = Et, Pr^__i__^, Bu^__t__^, CH~2~C~6~H~5~ or CH(CH~3~)C~6~H~5~] were prepared and their structures studied in the light of ^13^C chemical shifts. The γ effects caused by C(α)‐methyl or C(α)‐phenyl substit
## Benzimidazole -and benzotriazole-amino derivatives of prog2enoic acid were studied by 'H NMR spectroscopy in the liquid state and by "C NMR spectroscopy in the liquid and solid states. The spectra shows tautomerism of the benzimidazole and benzotriazole rings, E-2 isomerism of the double bond o