Dissociative Photoionization of sulfenylcarbonyl -C(O)S- compounds induced by synchrotron radiation

GERONÉS, MARIANA; ERBEN, MAURICIO F.; CORTÉS, EMILIANO; RODRÍGUEZ PIRANI, LUCAS; GE, MAOFA; ROMANO, ROSANA M.; YAO, LI; DELLA VEDOVA, CARLOS O.

REVISTA MEXICANA DE FíSICA

SOC MEXICANA FISICA

Año: 2010 vol. 56 p. 24 - 29

0035-001X

Total ion yield spectra as well as photoinduced fragmetation around the S 2p,Cl 2p, C 1s, O 1s, and F 1s transitions of the carbonylsulfenyl compounds: FC(O)SCl,ClC(O)SCl, CH3C(O)SH and CH3OC(O)SCl, have been measured by using synchrotron radiation in the range of 100-1000 eV and multicoincidence techniques, which include photoelectron-photoion coincidence (PEPICO) and phtotoelectron-photoionphotoion coincidence (PEPIPICO) time-of-flight (TOF) mass spectrometry. Complex electronic processes were observed at resonant energies below the S 2p ionization edge, which appear to be characteristic for -SC(O)-  containing compounds. The dissociation dynamic for the main ion-pair production is discussed. Dissociation channels were studied by evaluating the shape and slope of selected coincidence islands in the PEPIPICO spectra. Two- , three- and four-body processes, were proposed.