1. An electrically neutral .sigma.-sulfuranyl radical from the homolysis of a perester with neighboring sulfenyl sulfur: 9-S-3 species
2. (a) For reviews of both theoretical and experimental work, see: : in (eds): NMR Spectroscopy of Nuclei other than Protons, Wiley Interscience, New York, 1974;
3. (c) Carbon-13 NMR Spectroscopy, Academic Press, New York, 1972;
4. (d) : in Annual Reports in NMR Spectroscopy, (ed), Academic Press, New York, vol. 7 (1978).