Electrochemistry of electron transfer probes. Competition between ECE and DISP mechanisms in the reduction of α-aryloxyacetophenones
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The kinetics of the fast unimolecular fragmentation of α-aryloxyacetophenone radical anions in DMF has been analyzed by using a combination of linear sweep voltammetry and independently determined standard potentials or rate constants. The cleavage rates are in the range 3.8 × 105 s-1 to 2.8 × 108 s-1. The mechanism changes from a predominantly DISP mechanism to a predominantly ECE mechanism at fast cleavage rates. It was found that the effect of the heterogeneous electron transfer cannot be neglected when reactions with rate constants above 105 s-1 are studied by linear sweep voltammetry.
Originalsprog | Engelsk |
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Tidsskrift | Journal of Electroanalytical Chemistry |
Vol/bind | 412 |
Udgave nummer | 1-2 |
Sider (fra-til) | 53-58 |
Antal sider | 6 |
ISSN | 1572-6657 |
DOI | |
Status | Udgivet - 29 aug. 1996 |
Bibliografisk note
Funding Information:
We gratefully acknowledge the financial support from the Canadian Wood Pulps Network (D.D.M.W) and the Danish Natural Science Research Council (M.L.A.).
ID: 269748811