## Abstract ^13^C chemical shifts for 16 derivatives of furo[3,2โ__b__] pyrrole substituted at positions 2, 4 and 5 are reported. The __J__(CH) values were determined for some derivatives. Heterocorrelated 2D ^1^Hโ^13^C NMR spectra, selective heteronuclear decoupling and selective INEPT experiments
13C NMR spectra of some mesoionic 1,2,3-triazoles
โ Scribed by C. A. Tsoleridis; N. E. Alexandrou
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 187 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0749-1581
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โฆ Synopsis
The uC NMR spectra of three mesoionic 1,2,3-triazol-4-ylacetamides and two 1,2,3-triazol-4-ones were determined, and an evaluation of the shifts in relation to their mesoionic structure was made. A h e a r correlation between the I3C resonances and net charge densities, calculated by the CNDO/% method, was obtained.
๐ SIMILAR VOLUMES
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.
## Abstract ^1^H, ^13^C, ^14^N and ^15^N NMR data are reported for a series of mesoinoic 1,3,4โtriazoles and some of their salts. The results obtained show that the molecules studied exist in the cyclic mesoionic form with delocalization of the positive charge over the ring atoms. The corresponding
## Abstract Chemical shifts and substituent chemical shift (SCS) effects are reported for 21 monosubstituted isoโquinolines, carrying a halogeno, amino, piperidino or ethoxy group in position 1, 3 or 4. In some cases, assignments of ^13^C resonances were based on the spectra of the corresponding 5โ
## Abstract The ^13^C NMR spectra of some monoโ and geminal disubstituted protoadamantanes have been assigned with the aid of shift reagents.