Abstract
The electron photodetachment spectra for the enolate anions of acetaldehyde and acetaldehyde-d3 have been measured using an ion cyclotron resonance spectrometer in conjunction with a tunable dye laser. Sharp resonances at threshold are observed for both anions, and are attributed to a low-lying excited electronic state of the anion, which we relate to postulated ’’dipole-supported’’ states of electron–polar molecule systems. The electron affinity of the neutral enolate radicals CH2CHO and CD2CDO are found to be 1.824±0.005 and 1.819±0.005 eV, respectively.
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