Gas-phase ion chemistry of titanium tetrachloride and methyltitanium chloride (CH3TiCl3). Reaction of CH3TiCl2+ with ethylene
作者:Jack S. Uppal、Douglas E. Johnson、Ralph H. Staley
DOI:10.1021/ja00393a005
日期:1981.2
Matrix‐Isolation Study of the Vacuum‐Ultraviolet Photolysis of Chloroform. Infrared Spectra of the CCl<sub>3</sub><sup>+</sup>, HCCl<sub>2</sub><sup>+</sup>, and HCCl<sub>2</sub><sup>−</sup> Molecular Ions
作者:Marilyn E. Jacox、Dolphus E. Milligan
DOI:10.1063/1.1675449
日期:1971.5
Photolysis of samples of HCCl3 isolated in an argon matrix at 14°K using 1216-Å radiation leads not only to the isolation of a high yield of CCl3, but also to the photoionization of CCl3, resulting in the stabilization of a sufficient concentration of CCl3+ for direct infrared spectroscopic identification. The assignment of still other infrared absorptions which appear in this system to negatively charged species has been confirmed by experiments in which a small concentration of an alkali metal atom is also present in the matrix, providing a photoelectron source. When matrix-isolated HCCl3 is subjected to photolysis by 1067-Å argon resonance radiation, very little CCl3 is produced, but HCCl2, HCCl2+, and the same negatively charged species are stabilized in significant concentration. Studies of chloroform samples enriched in carbon-13 and of DCCl3 samples have provided support for these identifications and have yielded data necessary for obtaining several of the force constants of these species. The infrared spectrum of the negatively charged species can most satisfactorily be explained by postulating that dissociative electron attachment to chloroform occurs, resulting in the stabilization of HCCl2− in the matrix environment.
Lossing, F. P., Bulletin des Societes Chimiques Belges, 1972, vol. 81, p. 125 - 134
作者:Lossing, F. P.
DOI:——
日期:——
An Electron-Impact Study of Ionization and Dissociation in Methoxy- and Halogen-Substituted Methanes<sup>1</sup>
作者:R. H. Martin、F. W. Lampe、R. W. Taft
DOI:10.1021/ja00959a004
日期:1966.4
Chemical ionization mass spectrometry of halomethanes with tetramethylsilane as reagent gas
作者:Oleg S. Chizhov、Valentin I. Kadentsev、Andrei A. Stomakhin
DOI:10.1002/oms.1210270610
日期:1992.6
AbstractChemical ionization mass spectra of halomethanes measured using tetramethylsilane as reagent gas exhibit three major peaks corresponding to [M + SiMe3]+, [M − X]+ and (MeSi)2X+ ions (X = Cl, Br or I). Dihalomethanes CH2X2 form the most stable silylated molecular ions, whereas in the mass spectra of tetrahalomethanes (CX4) these ions have not been detected and the ions CX3+ are the most abundant. Production of bistrimethylsilyl‐halonium ions is the most pronounced process for haloforms (CHX3).