Spectrometric Characterization of Metribuzin and its Metabolites
| Autor: | O. Hernandez, G. D. Marbury, F. T. Corbin, P. W. Albro, Carol E. Parker |
|---|---|
| Rok vydání: | 1984 |
| Předmět: |
0106 biological sciences
Metabolite Dimer Protonation 04 agricultural and veterinary sciences 01 natural sciences Tautomer Enol NMR spectra database 010602 entomology chemistry.chemical_compound chemistry Metribuzin 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Organic chemistry Titration Instrumentation Spectroscopy |
| Zdroj: | Applied Spectroscopy. 38:556-562 |
| ISSN: | 1943-3530 0003-7028 |
| DOI: | 10.1366/0003702844555098 |
| Popis: | Metribuzin and its three major plant metabolites have been characterized by ultraviolet, infrared, and proton NMR spectroscopy and mass spectrometry. The reported structures for these compounds have been confirmed, except that deaminated Metribuzin (DA) exists mainly in the enol form rather than the keto form usually reported. Evidence is presented concerning the most probable sites of protonation during titration of these compounds. Whereas diketo Metribuzin (DK) does undergo protonation of the amino group, Metribuzin itself apparently does not. Keto/enol tautomerism as a function of pH greatly complicates interpretation of the spectra. Metribuzin appears to form a poorly soluble, hydrogen-bonded dimer (or polymer) when titrated from basic to acidic pH. |
| Databáze: | OpenAIRE |
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