Ruhr-Universität Bochum, Lehrstuhl Für Anorganische Chemie II D-4630 Bochum, FRG
Abstract:
The Bis (trifluormethylmercapto) amino radical (CF3S)2N· has been prepared by oxidation of Bis (trifluormethylmercapto) amine, (CF3S)2NH with activated lead diooxide in CCl3F solution at room temperature. The 10?5 – 10?6 molar solution of the radical shows in the ESR- spectrum a triplett of septetts with a isotropic nitrogen hyperfine splitting constant a(14N) = 13,2 G, a(19F) = 1.95 G, indicating that the radical is a planar sp2 species where the unpaired electron is located predominantly in the nitrogen 2p orbital. It is suggested that in solution an thermal equilibrium exists between the (CF3S)2 N radical and its dimer Tetrakis (trifluormethylmercapto)-hydrazine: Aspects of preparation as well as thermodynamic and kinetic details of the hydrazine (NN bond strength 7 kcal/mol?1) and the equilibrium, which can be followed by ESR-spectroscopy will be given.