𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C NMR spectra of 1,3,4-thiadiazole/thiadiazoline isomeric pairs

✍ Scribed by David M. Rackham; Sarah E. Morgan; W. R. Nigel Williamson

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
181 KB
Volume
14
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The ^13^C NMR spectra of four pairs of 1,3,4‐thiadiazole/thiadiazoline isomers have been recorded using broad band and off‐resonance proton decoupling techniques and in the coupled mode. Differences in the chemical shifts of the heterocyclic ring and the carbonyl carbons allow identification of the isomer present. Their IR and UV spectra are in agreement with literature reports for azole/azoline analogues.

📜 SIMILAR VOLUMES

1H and 13C NMR spectra and isomerism of
1H and 13C NMR spectra and isomerism of 3-aminoacroleins
✍ Antonio Gómez-Sánchez; Rocío Paredes-León; Juan Cámpora 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 248 KB 👁 2 views

A set of 3-alkylaminoacroleins (R1NHCHxCHCHxO, R1 \ alkyl) were studied by 13C and 1H NMR spectroscopy in solutions of di †erent solvents and, for the simplest representative of the series, 3methylaminoacrolein, at di †erent temperatures. The equilibrium solutions of these compounds consists of mixt

IR, 1H NMR and 13C NMR spectra of isomer
IR, 1H NMR and 13C NMR spectra of isomeric 1-aryl-4-methyl-3- and-5-pyrazolecarboxylic esters
✍ Pál Sohár; Ödön Fehér; Endre Tihanyi 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 371 KB

## Abstract The IR, ^1^H and ^13^C NMR spectra of six esters of 1‐aryl‐4‐methyl‐3‐ and 5‐pyrazolecarboxylic acids are reported. On the basis of their spectra the 3‐ or 5‐position of the substituent in such structural isomeric pairs can be established without recourse to the spectrum of the other me

1H and 13C NMR spectra of 3-substituted
1H and 13C NMR spectra of 3-substituted 4-quinolones
✍ Ľubomír Zalibera; Viktor Milata; Dušan Ilavský 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 180 KB 👁 2 views

A series of 14 3-substituted 4-oxoquinolones with or without a substituent (methyl, ethyl) in position 1 were prepared. Literature and measured data were used to study the inÑuence of the substituent on the shifts of carbon atoms of these compounds, which are model compounds for antibacterial drugs

13C NMR study of some derivatives of 1,3
13C NMR study of some derivatives of 1,3,4-oxadiazoles, 1,3,4-thiadiazoles and isosydnones
✍ Gérard Aranda; Michèle Dessolin; Michel Golfier; Marie-George Guillerez 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 493 KB

## Abstract The assignment of all ring carbons of 37 derivatives of 1,3,4‐oxa‐ or thiadiazoles and of seven isosydnones is described. In some cases, ^13^C‐labelled compounds were used. The analysis of substituent effects and the calculation of charge densities of some of the derivatives suggest tha

Total assignment of 1H and 13C NMR spect
Total assignment of 1H and 13C NMR spectra of two isomeric triterpenoids
✍ F. J. Q. Monte; J. P. Kintzinger; R. Braz-Filho 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 204 KB 👁 2 views

The complete 1H and 13C assignment of two closely related isomeric triterpenoid derivatives (methyl 2a,3b-di-Oacetylolean-12-en-28-oate and methyl 2a,3a-di-O-acetylurs-12-en-28-oate) is described. In addition to 1D NMR methods, 2D shift-correlated NMR techniques (COSY, NOESY, HMBC and HMQC) were use