59301-38-1Relevant academic research and scientific papers
The Formation, Stability and Decomposition of + (X=NH2, SH, OH and Cl) Ions During Hydrogen Chemical Ionization Mass Spectrometry
Colosimo, Marcello,Brancaleoni, Enzo
, p. 286 - 294 (1982)
The relevant peaks of the H2 chemical ionization mass spectra of C1-C4 amines, thiols, alcohols and chloroalkanes are reported.The stability of alkylonium ions is discussed on the basis of the proton affinity of the starting neutrals, the substituent alkyl group, and the functional group.The main decomposition paths of + ions are described, and the formation of significant ions is discussed.
Dissociative photoionization of CH3SSCH3 in the region of ～8-25 eV
Chiang, Su-Yu
, p. 9056 - 9063 (2007/10/03)
The dissociative photoionization of CH3SSCH3 has been investigated in the photon energy range of ～8-25 eV with a molecular beam/photoionization mass spectrometry/threshold photoelectron spectrometry system using synchrotron radiation as an ionization source. For dissociation above photon energy of 11.5 eV, six fragment ions of CH3+, C2H3+, SH3+, HCS+, S2+, and CH2S2+ were reported for the first time. The photoionization efficiency spectra for the parent ion and for 12 observed fragment ions, CH3+, C2H3+, SH3+, HCS+, CH2S+, CH2SH+, CH3SH+, CH3SH2+, CH3SCH2+, S2+, CH2S2+, and CH2S2H+, were measured; their branching ratios as a function of photon energy were derived. Ionization energy of 8.20±0.04eV for CH3SSCH3 and the appearance energy for each fragment ion were determined from the onsets of the photoionization efficiency spectra. Based on the appearance energy and existing thermochemical data, plausible structures of the fragment ions and their neutral counterparts are proposed. Fragmentation mechanisms that involve H migration and structural rearrangement in the dissociative photoionization processes are discussed.
