Title | INTRAMOLECULAR SELECTIVITY OF MUONIUM TOWARDS CHLORINATED AROMATIC-COMPOUNDS |
Publication Type | Journal Article |
Year of Publication | 1994 |
Authors | Venkateswaran, K, Stadlbauer, JM, Laing, ME, Klugkist, J, Chong, DP, Porter, GB, Walker, DC |
Journal | Hyperfine Interactions |
Volume | 87 |
Pagination | 947-952 |
Type of Article | Proceedings Paper |
ISBN Number | 0304-3843 |
Keywords | ADDITION-REACTIONS, AQUEOUS-SOLUTIONS, BENZOIC-ACID, HYDROGEN ISOTOPES, LEVEL-CROSSING RESONANCE, Pyrazine, WATER |
Abstract | Muon resonance studies show that muonium atoms (Mu) in ethanol add selectively to certain C-sites of aromatic compounds containing -Cl and -OH substituents. The sites chosen seem to be those carrying the lowest electron density. This helps to characterize Mu as a nucleophile in addition reactions and, in this respect, Mu differs from ordinary H-atoms. The study shows no apparent inter-molecular selectivity between a pair of aromatic solutes in an equimolar mixture, but strong intra-molecular selectivity in an ether composed of those two aromatic rings. This difference between intra- and inter-molecular selectivity is interpreted as kinetic in origin - arising from the ’caging effect’ of the solvent and peculiar to reactions close to the diffusion-controlled limit. |
URL | <Go to ISI>://A1994PA11800018 |
![](https://chem.ubc.ca/sites/default/files/styles/header_large_c/public/header_images/ugradlab-header.jpg?itok=-FidXx5L×tamp=1585256910)