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Digitale Medien

Multinuclear magnetic resonance study of some mesoionic 1,3,4-triazoles (1995)

Bocian, Wojciech ; Jaźwiński, Jaroslaw ; Stefaniak, Lech ; [weitere]

Chichester : Wiley-Blackwell

Organic Magnetic Resonance 33 (1995), S. 134-137

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ISSN: 0749-1581

Schlagwort(e): NMR ; 1H NMR ; 13C NMR ; 14N NMR ; 15N NMR ; Mesoionic triazoles ; Charge delocalization ; Protonation ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: 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.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/mrc.1260330209

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