Research & Teaching Faculty

ORTHO-DIRECTIONAL, META-DIRECTIONAL, PARA-DIRECTIONAL EFFECTS IN MUONIUM ADDITION TO BENZOIC-ACID IN WATER

TitleORTHO-DIRECTIONAL, META-DIRECTIONAL, PARA-DIRECTIONAL EFFECTS IN MUONIUM ADDITION TO BENZOIC-ACID IN WATER
Publication TypeJournal Article
Year of Publication1990
AuthorsStadlbauer, JM, Barnabas, MV, Wu, Z, Walker, DC
JournalHyperfine Interactions
Volume65
Pagination939-943
Type of ArticleProceedings Paper
ISBN Number0304-3843
KeywordsCONSTANTS, CYCLOHEXADIENYL, LEVEL-CROSSING-RESONANCE, LIQUIDS, ORGANIC FREE-RADICALS, radicals
Abstract

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 x 10(9), 0.45 x 10(9) and 0.85 x 10(9) M-1S-1 respectively. Ortho-addition dominates by a large factor, which is in accord with the electron-withdrawing character of the -COOH group.

URL<Go to ISI>://A1990EZ85600023