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

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

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 energiesbelow 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.