Pb-centered radicals

This led to the first observation in solution of radicals centered on Si (1969) (16, ISO), Ge (1969) (16), and Sn (1972) (188). Hyperfine coupling to the central atom was only observed for Si. A Pb-centered radical has not yet been detected in solution, although the existence of such species has been inferred from ESR results. For example, photolysis of a solution of PMVIee in the cavity of a spectrometer gave a lead mirror but no signal attributable to PbMe3 (weak Me was observed). In the presence of an... 

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