A 193 NM LASER PHOTOFRAGMENTATION TIME-OF-FLIGHT MASS-SPECTROMETRIC STUDY OF CH3CH2SH

The kinetic energy releases of the photodissociation processes, CH3CH2SH + hv (193 nm) --> CH3CH2 + SH, CH3CH2S + H, and CH3 + CH2SH, have been measured by the time-of-flight mass spectrometric method. Based on the thresholds of kinetic energy spectra, the dissociation energies of 72.4 +/- 1.5, 90 +/- 2, and 90 +/- 10 kcal/mol have been obtained for the CH3CH2-SH, CH3CH2SH, and CH3-CH2SH bonds at 0 K.