𝔖 Bobbio Scriptorium
✦   LIBER   ✦

1H and 13C NMR study of the prototropic tautomerism of 4(5)-vinyl-1,2,3-triazole in dimethylformamide as solvent

✍ Scribed by S. Toppet; G. Wouters; G. Smets

Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
162 KB
Volume
11
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Carbon‐13 NMR study of 4(5)‐vinyl‐1,2,3‐triazole in dimethylformamide at −55°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.

📜 SIMILAR VOLUMES

On the Tautomeric Structure of 5-hydroxy
On the Tautomeric Structure of 5-hydroxy- and 5-mercapto-1H-1,2,3-triazoles: −13C NMR analysis
✍ Gerrit L'abbé; Pieter Delbeke; Gonda van Essche; Ingrid Luyten; Karin Vercautere 📂 Article 📅 2010 🏛 Wiley (John Wiley & Sons) ⚖ 176 KB 👁 1 views

## Dedicated to Professor G. Smets on the occasion of his 75th birthday The title compounds have been analyzed by 13C NMR spectroscopy and compared with the N-3 methyl and O/S alkyl derivatives. The mesoionic structures 2a,b are rejected in favour of la,b on the basis of the 2Jc5 = CH coupling con

1H and 13C NMR study of novel fused 1,2,
1H and 13C NMR study of novel fused 1,2,4-triazole heterocycles
✍ Zoltán Szabó; Ferenc Kóródi; Gyula Batta 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 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

The tautomerism of Omeprazole in solutio
The tautomerism of Omeprazole in solution: a 1H and 13C NMR study
✍ Rosa M. Claramunt; Concepción López; Ibon Alkorta; José Elguero; Rong Yang; Stev 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 90 KB 👁 2 views

## Abstract The tautomerism of 5(6)‐methoxy‐2‐{[(4‐methoxy‐3,5‐dimethyl‐2‐pyridinyl)methyl] sulfinyl}‐1__H__‐benzimidazole (omeprazole) was determined in solution, __K__~__T__~ = 0.59 in THF at 195 K, in favor of the 6‐methoxy tautomer. The assignment of the signals was made by comparison with its

Studies of tautomerism and protonation i
Studies of tautomerism and protonation in 2-aryl-1H-imidazo[1,2-a]imidazole derivatives using 1H and 13C NMR
✍ Maili Liu; R. Duncan Farrant; Robert C. Glen; John C. Lindon; Paul Barraclough; 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 459 KB

## Abstract The tautomerism and protonation of the putative inotropic 2‐(2′,4′‐dimethoxy)phenyl‐1__H__‐imidazo[1,2‐__a__]imidazole (2) has been studied in several solvents by comparing its ^1^H and ^13^C chemical shifts with those of its 1‐ and 7‐methyl derivatives 3 and 4, respectively, and acid s

1H and 13C NMR study of 5-substituted-4-
1H and 13C NMR study of 5-substituted-4- (arylidene)amino-2,4-dihydro-3H-1,2,4-triazole-3-thiones and 6-aryl-3-(D-gluco- pentitol-1-yl)-7H-1,2,4-triazolo[3,4-b] [1,3,4]thiadiazines
✍ Anjiang Zhang; Lixue Zhang; Xinxiang Lei 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 95 KB

## Abstract Five 5‐substituted‐4‐(arylidene)amino‐2,4‐dihydro‐3__H__‐1, 2,4‐triazole‐3‐thiones (2a–2e) and seven 6‐aryl‐3‐(D‐gluco‐pentitol‐1‐yl)‐7__H__‐1,2,4‐triazolo[3,4‐b][1,3,4]thiadiazines (3a–3g) were synthesized. The complete ^1^H and ^13^C NMR chemical shift assignments were analyzed on one

Temperature and solvent variation of the
Temperature and solvent variation of the 13C and 1H NMR spectra of r-1,t-2,c-3,t-4-tetrachlorotetralin
✍ Graham A. Bowmaker; David J. Calvert; Peter B. D. de la Mare; Alan J. Jones 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 310 KB

## Abstract Vicinal coupling constants in the ^1^H and ^13^C NMR spectra of __r__‐1,__t__‐2,__c__‐3,__t__‐4‐tetrachlorotetralin change with temperature and solvent in a manner better explained by conformational equilibration than by intramolecular or solvent‐determined distortions.