The additivity relationship and substituent effects studied by EPR and multiresonance spectroscopy
| Autor: | Reijo Mäkelä, Heikki Joela |
|---|---|
| Rok vydání: | 1989 |
| Předmět: |
Coupling constant
Chemistry Stereochemistry General Engineering Substituent Electron donor Resonance (chemistry) Acceptor law.invention chemistry.chemical_compound law Physics::Atomic and Molecular Clusters Physical chemistry Molecule Physics::Chemical Physics Electron paramagnetic resonance Spectroscopy |
| Zdroj: | Journal of Magnetic Resonance (1969). 84:236-246 |
| ISSN: | 0022-2364 |
| DOI: | 10.1016/0022-2364(89)90367-3 |
| Popis: | The additivity relationship is studied for anion radicals of substituted benzenes using EPR spectroscopy. Additivity parameters were calculated separately for the symmetrical and antisymmetrical states of the degenerate parent molecule. It is shown that the additivity relationship gives better results when the signs of the coupling constants are taken into account. Hyperfine coupling constants, with their signs, were measured by ENDOR and TRIPLE resonance spectroscopy for two anion radicals of substituted benzene: cyanobenzene and m -dinitrobenzene. In addition a theory is developed for the electron donor and acceptor property of a substituent. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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