𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Study of the rotational isomerism of 1-vinyl-1,2,4-triazoles by1H and13C NMR spectroscopy

✍ Scribed by A. V. Afonin; B. V. Trzhtsinskaya; E. V. Apakina

Publisher
Springer US
Year
1991
Tongue
English
Weight
397 KB
Volume
27
Category
Article
ISSN
0009-3122

No coin nor oath required. For personal study only.

✦ Synopsis

Quantitative evaluations of the percentages of rotational isomers in 1-vinyl-l, Z 4-triazoles were obtained. The population of the s.cis(N(2)) form in 1-vinyl-l,2,4-triazole is greater by a factor of two than in the s-trans form.

Quantitative evaluations of the percentages of the rotational isomers

[s-cis(N 25 ) and s-trans(N 23 )] in 1-vinyl ( ) ( ) pyrazoles and 1-vinylimidazoles [1], as well as in 1-and 2-vinyltetrazoles [2], have been previously obtained. Qualitative predominance of the s-cis conformation was established for 1-vinyl-l,2,4-triazoles from PMR data, while indications of the percentage of the s-trans conformation were not observed [3]. In the present research we made a quantitative evaluation of the populations of the rotational isomers in 1-vinyl-l,2,4-triazoles by 1H and 13C NMR spectroscopy.

πŸ“œ SIMILAR VOLUMES

1H and 13C NMR spectroscopy of substitut
1H and 13C NMR spectroscopy of substituted 1,2,3-triazoles
✍ Xiao-Wen Sun; Peng-Fei Xu; Zi-Yi Zhang πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 153 KB πŸ‘ 1 views

1-Aryl-4-carboxy-5-methyl-1,2,3-triazoles were prepared by the condensation of aryl azides with ethyl acetoacetate. The structures of these compounds were characterized by MS, IR and 1H and 13C NMR spectroscopy. The measured and calculated 13C chemical shifts of the aromatic carbons were compared.

1H and 13C NMR study of novel fused 1,2,
1H and 13C NMR study of novel fused 1,2,4-triazole heterocycles
✍ ZoltΓ‘n SzabΓ³; Ferenc KΓ³rΓ³di; Gyula Batta πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 449 KB

## Abstract The ^1^H and ^13^C NMR spectra of some novel 1,2,4‐triazolo [1,3] thiazinoquinoline isomeric pairs are interpreted in terms of structural assignments. The structure of most compounds has been confirmed by NOE difference spectroscopy. Characteristic differences have been observed in both

1H and 13C NMR study of the prototropic
1H and 13C NMR study of the prototropic tautomerism of 4(5)-vinyl-1,2,3-triazole in dimethylformamide as solvent
✍ S. Toppet; G. Wouters; G. Smets πŸ“‚ Article πŸ“… 1978 πŸ› John Wiley and Sons 🌐 English βš– 162 KB

## Abstract Carbon‐13 NMR study of 4(5)‐vinyl‐1,2,3‐triazole in dimethylformamide at βˆ’55Β°C 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.