Being considered just a few decades ago only as fleeting reactive intermediates, silyl, germyl and stannyl radicals, cations and anions now constitute an important class of real, observable and in many cases isolable and fully characterizable compounds. In this symposium, the chemistry of stable free radicals on the heavier group 14 elements (Si, Ge, Sn) will be focused; the first one concerns the chemistry of the stable neutral radical species of cyclic and acyclic radicals, the second one is devoted to the charged radical species, the third one is chemistry of the heavy group 14 centered biradicals with singlet and triplet states. The electronic and crystal structural features of these radicals and ion radicals, both in the solid state and in solution, are compared with each other. The most important parameters affecting the stability, geometry and electronic configuration of the radicals are discussed. The interconversion between the heavy cations�radicals�anions is very important for the development of material science.

Stable radicals of the heavy group 14 elements: From phantom species to isolable compounds and their application

247th National Meeting (2014)

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