15N NMR investigation of the tautomeric equilibria of some 1,2,4-triazoles and related compounds
✍ Scribed by Elzbieta Bojarska-Olejnik; Lech Stefaniak; Michal Witanowski; Graham A. Webb
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 489 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
MN NMR shielding data for some 3-methoxy-1,2,4-triazoles and related triazolones are reported.
Assignments are given with the assistance of some INDOlS parameterized SOS Shielding calculations. From the ' ' N NMR shielding results it is possible to give a quantitative account of some potential prototropic tautomeric equilibria.
📜 SIMILAR VOLUMES
## Abstract The ^13^C, ^15^N and ^77^Se NMR data (chemical shifts and coupling constants) of some cycloakeno‐1,2,3‐selenadiazoles are presented. Extremely large ^77^Se chemical shifts are found. ^15^N, ^77^Se coupling constants, obtained at natural abundance, are reported for the first time. Strong
## Abstract 5‐Substituted 1,3,4‐thiadiazol‐2(3__H__)‐ones were shown to exist almost exclusively in the oxo tautomeric form with the aid of proton‐coupled ^15^N‐NMR spectra using the corresponding 3‐methyl‐1,3,4‐thiadiazol‐2(3__H__)‐ones and 5‐substituted‐2‐methoxy‐1,3,4‐thiadiazoles as reference c
## Abstract ^1^H, ^13^C and ^15^N NMR measurements (1D and 2D including ^1^H^15^N gs‐HMBC) have been carried out on 3‐amino‐1, 2,4‐benzotriazine and a series of __N__‐oxides and complete assignments established. __N__‐Oxidation at any position resulted in large upfield shifts of the corresponding
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v