## Abstract The ^13^C n.m.r. spectra of 18 derivatives of the tricyclo[3.2.1.0^2,4^]octanes have been determined. This series includes methyl, hydroxyl and oxo substituted examples to compare the effects of these substituents on the skeletal carbon shieldings with those observed for the correspondi
N.m.r. studies in the heterocyclic series: XVII—carbon-13 spectra of indazole derivatives
✍ Scribed by Philippe Bouchet; Alain Fruchier; Gérard Joncheray; Jose Elguero
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 230 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The ^13^C chemical shifts of 17 indazole derivatives are discussed as a function of substituent effects and the N‐1—H or N‐2—H structure of indazole. The presence in solution of the N‐1—H tautomer is confirmed.
📜 SIMILAR VOLUMES
## Abstract The ^15^N chemical shifts and ^1^H^15^N and ^13^C^15^N coupling constants of nine monolabelled indazoles were measured and assigned. The experimental values are discussed in terms of the indazolic and iso‐indazolic structures, and compared with literature data for other related hetero
## Abstract The 1‐NH structure for 3‐azidoindazole has been demonstrated by the observation of ^1^H^1^H and ^13^C^1^H couplings involving the hydrogen atom attached to nitrogen. A comparison between 3‐azidoindazole and indazole shows that both compounds have the same tautomeric structure.
A comparative study of the 13C chemical shifts and the 'H-13C and 19F-13C coupling constants of N-arylpyrazoles, pyrazolium salts and 2-methyl-and 2-vinylpyrazolium quaternary salts has been carried out. The effect of introducing a substituent at positions 2 and 5 of the pyrazole ring on the conjuga
## Abstract Assignment of the carbon resonances in nine derivatives of __N__‐hydroxybenzotriazole has been carried out. The ^13^C NMR method enables tautomeric __N__‐hydroxy and __N__‐oxide and isomeric __O__‐ and __N__‐acyl structures to be identified. In DMSO, the predominant tautomer of __N__‐hy