## Abstract PE spectral comparisons of the title compounds with the corresponding __O__โ and __N__โmethyl fixed derivatives show that both 2โ and 4โquinolone exist as the NH forms in the vapour phase: none of the OH tautomers could be detected.
A photoelectron study (HeI, HeII) of the tautomeric equilibrium of chloro- and bromo-1,2,4-triazoles
โ Scribed by C. Guimon; G. Pfister-Guillouzo; A. Bernardini; P. Viallefont
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- French
- Weight
- 536 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0040-4020
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๐ SIMILAR VOLUMES
## Abstract Carbonโ13 NMR study of 4(5)โvinylโ1,2,3โtriazole in dimethylformamide at โ55ยฐC allows direct observation of the three separate tautomers. The ^13^C chemical shift values of the three forms, as well as their percentages in the tautomeric mixture, are given.
## Abstract The tautomerism of pyridones and 1,2,4โtriazoles related to two crown ethers and two crown esters derived from these heterocycles was studied theoretically. For the four macrocycles, Bradshaw identified a single tautomer by __X__โray crystallography. To rationalize these findings, a ser
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