CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Unidad Ejecutora - UE
Dissociative Photoionization of Methoxycarbonylsulfenyl Chloride, CH3OC(O)SCl, Following Sulfur 2p, Chloride 2p, and Oxygen 1s Excitations
ERBEN, MAURICIO FEDERICO; GERONÉS, MARIANA,; ROMANO, ROSANA MARIEL; DELLA VÉDOVA, CARLOS OMAR
JOURNAL OF PHYSICAL CHEMISTRY A
American Chemical Society
Año: 2007 vol. 111 p. 8062 - 8062
Total ion yield spectra and photoinduced fragmentations following S 2p, Cl 2p, and O 1s inner shell excitations of methoxycarbonylsulfenyl chloride, CH3OC(O)SCl, have been studied in the gaseous phase by using synchrotron radiation and multicoincidence techniques, which include photoelectron-photoion coincidence (PEPICO) and photoelectron-photoion-photoion coincidence (PEPIPICO) time-of-flight (TOF) mass spectrometry. According to the analysis of the partial ion yield spectra the S+ ion signal shows a steep enhancement near the S 2p resonance, which could represent an evidence of state-specific fragmentations promoted by electronic excitations from the S 2p to vacant orbitals with strong antibonding character mainly located at the sulfur atom. The dissociation dynamics for selected PEPIPICO islands have been discussed. Fragmentation channels that involve the extrusion of H+ and CHx + (x ) 0, 1, 2, 3) fragments have been predominantly observed for dissociation of doubly charged CH3OC(O)SCl2+.