Dissociative Photoionization of Methyl Thiochloroformate, ClC(O)SCH sub(3), Following Sulfur 2p, Chlorine 2p, Carbon 1s, and Oxygen 1s Excitations

The electronic transitions and the dissociative ionic photoionization mechanisms of gaseous ClC(O)SCH sub(3) have been investigated at the VUV and soft X-ray energy regions of S 2p, Cl 2p, C 1s, and O 1s core edges using tunable synchrotron radiation and time-of-flight mass spectrometry. The relative abundances of the ionic fragments were obtained from both PEPICO (photoelectron photoion coincidence) and PEPIPICO (photoelectron photoion photoion coincidence) spectra. The presence of a moderate site- and element-specific fragmentation effects and its implication regarding chemical reactions were analyzed. The relationship of the current results with the interstellar chemistry is also a goal of this piece of work.