ChemInform Abstract: TETRAKIS(TRIFLUOROMETHYL)ETHYLENE ANION‐RADICAL

Electrochemical Behavior and EPR of Radical Anions of Perfluoroalkyl-Substituted Olefins

“…Under the latter conditions, the difference between the anodic (£,») and the cathodic (£pc) peak potentials for the couple Ri/ is close to 60 mV at 25 °C, corresponding to a reversible one-electron transfer,113 to give the corresponding radical anion (RF-) (see eq 1), in agreement with literature data. 5 The analysis of the slope plot116 of the polarographic wave Ri confirms this result.…”

“…(G) = (1/3)£(G>, (5) The contribution to the EPR absorption spectrum of that nuclear configuration is given by the imaginary part of (G). (G)" are given by the solutions of the system of three linear equations of type (G)j = -iulMzr/( 1 + ) + ((G)*+ <G)z)/[2(1+";t)] (6) where = gB\ is the Rabi frequency; Mz is the magnetization along the z axis, which in no-saturation conditions corresponds to the equilibrium value Mo', r is the lifetime of the free radical in a fixed conformation; n¡ = (1/7/) -( + oi¡), with 1/7/ the residual line width due to process other than the exchange among conformers;…”

“…To our best knowledge, the only work dealing with them concerns the electrochemical reduction of tetrakis(trifluoromethyl)ethylene in dimethylformamide solution. 5 The present paper concerns an electrochemical and EPR investigation of radical anions produced by the reduction of some simple perfluoroalkyl-substituted olefins, readily available by anionic oligomerization of tetrafluoroethylene and hexafluoropropene.…”