Molecules containing unpaired electrons are fascinating species. Several kinds of persistent and stable radicals have been described in the past, and several more general classes of (poly)radicals have been developed in recent times. As stated recently, “much of the current interest in stable radicals probably arises […] from the fundamental structure and bonding issues that naturally arise with this class of compounds” (R. G. Hicks, Org. Biomol. Chem. 2007, 5, 1321.). Most often, light carbon-based or heteroatom radicals have been studied. Investigations on heavier main group radicals are fewer in number, although the last decades witnessed spectacular discoveries in the chemistry of the heavier main group elements. Apart from the synthesis of yet unknown persistent and stable radicals, our interest in this area focusses on electrochemical and EPR spectroscopic aspects.
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