Abstract

The vacuum ultraviolet (VUV) pulsed field ionization photoelectron (PFI-PE) spectra for CH3SH and CH3CH2SH have been obtained near their ionization thresholds. Using a semiempirical simulation scheme, we have obtained satisfactory fits to fine structures resolved in the VUV-PFI-PE spectra, yielding accurate ionization energies of 76 256.3±2.9 cm−1 (9.454 58±0.000 36 eV) and 74 948.7±2.9 cm−1 (9.292 46±0.000 36 eV) for CH3SH and CH3CH2SH, respectively.

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