Dissociative Photoionization of Methoxycarbonylsulfenyl Chloride, CH3OC(O)SCl, Following Sulfur 2p, Chlorine 2p, and Oxygen 1s Excitations

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• 作者：Mauricio F. Erben ; Mariana Geron&eacute ; s ; Rosana M. Romano ; Carlos O. Della V&eacute ; dova
• 刊名：Journal of Physical Chemistry A
• 出版年：2007
• 出版时间：August 23, 2007
• 年：2007
• 卷：111
• 期：33
• 页码：8062 - 8071
• 全文大小：345K
• 年卷期：v.111,no.33(August 23, 2007)
• ISSN：1520-5215

文摘

Total ion yield spectra and photoinduced fragmentations following S 2p, Cl 2p, and O 1s inner shell excitationsof methoxycarbonylsulfenyl chloride, CH₃OC(O)SCl, have been studied in the gaseous phase by usingsynchrotron radiation and multicoincidence techniques, which include photoelectron-photoion coincidence(PEPICO) and photoelectron-photoion-photoion coincidence (PEPIPICO) time-of-flight (TOF) massspectrometry. According to the analysis of the partial ion yield spectra the S⁺ ion signal shows a steepenhancement near the S 2p resonance, which could represent an evidence of state-specific fragmentationspromoted by electronic excitations from the S 2p to vacant orbitals with strong antibonding character mainlylocated at the sulfur atom. The dissociation dynamics for selected PEPIPICO islands have been discussed.Fragmentation channels that involve the extrusion of H⁺ and CH_x⁺ (x = 0, 1, 2, 3) fragments have beenpredominantly observed for dissociation of doubly charged CH₃OC(O)SCl²⁺.