J. U. Skaare, T. Henriksen
Nov 1, 1975
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0
Influential Citations
11
Citations
Journal
Journal of the Science of Food and Agriculture
Abstract
Electron spin resonance (ESR) studies on the antioxidant 6-ethoxy-1, 2-dihydro-2,2,4-trimethylquinoline (ethoxyquin) showed that the compound exists partly in the free radical form. The radical which was found both in solutions of ethoxyquin and in the compound itself, exhibits an ESR signal consisting of six lines which form a triplet of doublets. The hyperfine structure can be ascribed to an interaction of the unpaired electron with a nitrogen and a proton. The ESR data were: g = 2.0050, AN = 10.8 gauss and AH = 3.7 gauss. The responsible radical is presumably formed by a dissociation of a hydrogen atom from the secondary amine. The radical concentration was found to be increased significantly by the presence of u.v. light. The ESR data were supported by some mass spectral data.