ELECTRON AND ORGANIC RADICAL ANION SOLVATION. PULSE RADIOLYSIS OF TETRAHYDROFURAN AND ITS SOLUTIONS OF N-METHYLACETAMIDE OR PYRROLIDONE

The competition between electron solvation and presolvated electron capture by an amide solute (linear or cyclic), N-methylacetamide (NMA) or pyrrolidone (Pyr), was studied in tetrahydrofuran (THF) by using the pulse radiolysis technique. A simple competition law was found, (OD/sub es/-)/sup -1/ being proportional to the scavenger concentration for both NMA and Pyr. Evidence of dry organic anion formation was shown, but stabilization occurred only for NMA- giving rise to a transient absorbing solvated species, NMA/sub s//sup -/. A relationship between (OD/sub NMAs/-)/sup -1/ and (OD/sub es/-)/sup -1/ was established, which takes into account both the competition between electron solvation and presolvated electron capture by NMA, and the competition between NMA- solvation and its reaction with NMA. A mechanistic scheme of the electron attachment process in the liquid phase is discussed and compared with that in the dense gas phase.