Electrochemical properties and computations of stable radicals of the heavy group 14 elements (Si, Ge, and Sn).
A series of stable radicals centered on persilyl-substituted heavy Group 14 elements, (tBu(2)MeSi)(3)E(*) (E = Si, Ge, Sn), was studied by cyclic voltammetry in different solvents to determine their first oxidation and reduction potentials and to compare their ease of oxidation and reduction with known experimental and computed ionization energies (E(i)) and electron affinities (E(ea)), respectively. It has been observed that all of the first oxidation and reduction potentials for the three radicals studied are irreversible in o-dichlorobenzene (o-DCB), whereas the reduction waves are quasi-reversible in THF. A good correlation has been found between measured oxidation potentials and ionization energy values, but no correlation between reduction potentials and electron affinity values was found, probably due to kinetic and surface effects.
Becker
James Y
JY
Department of Chemistry, Ben-Gurion University of the Negev, Beer Sheva 84105 (Israel), Fax: (+972)-8-6472943.
Lee
Vladimir Ya
VY
Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571 (Japan), Fax: (+81)-29-853-4314.
Nakamoto
Masaaki
M
Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571 (Japan), Fax: (+81)-29-853-4314.
Sekiguchi
Akira
A
Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571 (Japan), Fax: (+81)-29-853-4314.
Chrostowska
Anna
A
Institut Pluridisciplinaire de Recherche sur l'Environnnement et les Matériaux, UMR 5254, Université de Pau et des Pays de l'Adour, Av. de l'Université, BP 1155, 64 013 Pau Cedex (France), Fax: (+33)-5-59407451.
Dargelos
Alain
A
Institut Pluridisciplinaire de Recherche sur l'Environnnement et les Matériaux, UMR 5254, Université de Pau et des Pays de l'Adour, Av. de l'Université, BP 1155, 64 013 Pau Cedex (France), Fax: (+33)-5-59407451.