Mass Spectrometric Studies of the Ionization and Thermal Decomposition of Tungsten π-Cyclopentadienyl Tricarbonyl Dimer

1975 ◽  
Vol 53 (5) ◽  
pp. 628-632 ◽  
Author(s):  
J. R. Krause ◽  
D. R. Bidinosti
Keyword(s):  
Thermal Decomposition ◽  
High Temperature ◽  
Mass Spectrum ◽  
Temperature Dependence ◽  
Electron Impact ◽  
Enthalpy Change ◽  
Mass Spectrometric ◽  
Molecular Flow ◽  
Electron Impact Mass ◽  
Impact Mass

The ionization and thermal decomposition of tungsten π-cyclopentadienyl tricarbonyl dimer [WC5H5(CO)3]2 was investigated using a mass spectrometer fitted with single and double cell molecular flow inlet systems.The electron impact mass spectrum and appearance potentials for the principle ions in the spectrum have been measured and recorded.The enthalpy change for the dissociation[Formula: see text]obtained from van't Hoff plots of the temperature dependence of the equilibrium constant was found to be 234.4 ± 3.8 kJ/mol. This result was substantiated by an electron impact value of 221.0 ± 20.1 kJ/mol based on an ionization potential for ·WC5H5(CO)3 of 7.66 ± 0.05 eV measured in the high temperature studies.

Electron Impact Mass Spectroscopy for Identification of Phencyclidine

1986 ◽  
Vol 69 (5) ◽  
pp. 814-820
Author(s):  
Charles C Clark
Keyword(s):  
Mass Spectrum ◽  
High Resolution ◽  
Electron Impact ◽  
Mass Spectroscopy ◽  
Phenyl Ring ◽  
Labeled Compounds ◽  
Electron Impact Mass ◽  
High Resolution Mass Spectroscopy ◽  
Impact Mass ◽  
Resolution Mass

Abstract The electron impact mass spectrum of phencyclidine (PCP) was studied using both deuterium-labeled analogs and high-resolution mass spectroscopy. The deuterium-labeled compounds used were d5.PCP having 5 deuterium atoms on the phenyl ring, d10.PCP having 10 deuterium atoms on the cyclohexyl ring, and d15.PCP having deuterium atoms on both the phenyl and cyclohexyl rings. The identities of some major fragments and some possible pathways for their formation are shown. Electron impact mass spectroscopy is shown to be a definitive test for the identification of PCP.

Electron impact mass spectrometric investigation of pyrrole mono-, di- and tri-carboxylic acids

1991 ◽  
Vol 26 (11) ◽  
pp. 972-976 ◽  
Author(s):  
Carlo Costa ◽  
Antonella Bertazzo ◽  
Graziella Allegri ◽  
Silvia Catinella ◽  
Pietro Traldi
Keyword(s):  
Electron Impact ◽  
Carboxylic Acids ◽  
Mass Spectrometric ◽  
Spectrometric Investigation ◽  
Mass Spectrometric Investigation ◽  
Electron Impact Mass ◽  
Impact Mass

Electron Impact Mass Spectrometric Detection of Freon®in Biological Specimens

1977 ◽  
Vol 22 (1) ◽  
pp. 10365J ◽  
Author(s):  
R. W. Urich ◽  
P. H. Wittenberg ◽  
D. L. Bowerman ◽  
J. A. Levisky ◽  
J. L. Pflug
Keyword(s):  
Electron Impact ◽  
Mass Spectrometric ◽  
Mass Spectrometric Detection ◽  
Electron Impact Mass ◽  
Impact Mass
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