
%0 Journal Article
%A Leaver, IH 
%A Ramsay, GC 
%A Suzuki, E 
%T E.S.R. of nitroxide radicals. I. Photolysis of indoles, phenols, disulphides, and thiols
%J Australian Journal of Chemistry
%D 1969/09/01
%V 22
%N 9
%P 1891-1897
%K 
%R https://doi.org/10.1071/CH9691891
%U https://www.publish.csiro.au/paper/CH9691891 
%X The formation of stable nitroxide radicals during the photochemical decomposition of a number of indoles, phenols, disulphides, and thiols in the presence of a nitrosoalkane radical scavenger has been demonstrated. The predominant e.s.r. spectrum obtained with dibutyl disulphide or butane-1-thiol consists of a simple triplet hyperfine splitting with aN 18.5 G and g 2.0071, attributed to the trapping of butane-1-thiyl radicals. Phenol and indole give similar triplet spectra with aN 15.55 G, g 2.0061, and aN 16.26 G, g 2.0060, respectively.     The formation of trichloromethyl radicals during the photolysis of indole in carbon tetrachloride has been confirmed by analysis of the e.s.r. spectrum of the trichloromethyl nitroxide radical using a least- squares curve-fitting procedure. Isotropic hyperfine splitting constants for 14N, 35Cl, and 37Cl have been obtained. 
