Ortho-m meta-, para-directional effects in muonium addition to benzoic acid in water
| Autor: | John M. Stadlbauer, David C. Walker, WU Zhennan, Mary V. Barnabas |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Nuclear and High Energy Physics
Range (particle radiation) Proton Chemistry Stereochemistry Radical Muonium Condensed Matter Physics Resonance (chemistry) Atomic and Molecular Physics and Optics chemistry.chemical_compound Crystallography Kinetic isotope effect Physical and Theoretical Chemistry Formation rate Benzoic acid |
| Zdroj: | Hyperfine Interactions. 65:939-943 |
| ISSN: | 1572-9540 0304-3843 |
| DOI: | 10.1007/bf02397746 |
| Popis: | Isomeric free radicals formed by Mu adding to o/m/p positions of benzoic acid in water were detected by LCR and the corresponding resonance positions and proton hyperfine coupling constants were obtained. There was an isotope effect of the ‘second kind’ for these Mu-radicals in the range of 1.26–1.32. The ‘fractional’ formation rate constants per site are 2.7×109, 0.45×109 and 0.85×109 M−1s−1 respectively. Ortho-addition dominates by a large factor, which is in accord with the electron-withdrawing character of the −COOH group. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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