The e.s.r. spectrum of a short-lived radical obtained by the ultra-violet photolysis of 2,3,5,6-tetrachloronitrobenzene in various solvents has been attributed to a monohydrogenated species. The hydrogen hyperfine splitting constants range from 0.38 to 0.50 millitesla. A tentative value of 106 M–1 s–1 has been placed on the upper limit of the second-order decay constant.
D. J. Cowley and L. H. Sutcliffe, Trans. Faraday Soc., 1969, 65, 2286 DOI: 10.1039/TF9696502286
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