ISSN:
0749-1581
Keywords:
NMR
;
1H NMR
;
13C NMR
;
14N NMR
;
15N NMR
;
Mesoionic triazoles
;
Charge delocalization
;
Protonation
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
1H, 13C, 14N and 15N NMR data are reported for a series of mesoinoic 1,3,4-triazoles 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 negative charge occurs on the atoms of the exocyclic groups, which also act as the site of protonation and salt formation. The most important experimental data for these interpretations are found to be the nitrogen shieldings and that for C-5.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260330209
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