Heats of formation of alkyl radicals from appearance energies

1988 ◽  
Vol 110 (22) ◽  
pp. 7339-7342 ◽  
Author(s):  
John L. Holmes ◽  
F. P. Lossing ◽  
Allan. Maccoll
Keyword(s):  
Heats Of Formation ◽  
Alkyl Radicals

ChemInform Abstract: Heats of Formation of Alkyl Radicals from Appearance Energies

ChemInform ◽  
1989 ◽  
Vol 20 (7) ◽  
Author(s):  
J. L. HOLMES ◽  
F. P. LOSSING ◽  
A. MACCOLL
Keyword(s):  
Heats Of Formation ◽  
Alkyl Radicals

Free radicals by mass spectrometry. XLIL Ionization potentials and ionic heats of formation for C1—C4 alkyl radicals

1970 ◽  
Vol 48 (6) ◽  
pp. 955-965 ◽  
Author(s):  
F. P. Lossing ◽  
G. P. Semeluk
Keyword(s):  
Free Radicals ◽  
Excited States ◽  
Kinetic Data ◽  
Ionization Potentials ◽  
Heats Of Formation ◽  
Alkyl Radicals ◽  
Fragment Ions ◽  
Vibrational Levels ◽  
Upward Curvature ◽  
Linear Sections

Ionization potentials for C1—C4 alkyl free radicals have been re-measured by electron impact, using an energy-resolved electron beam from a double-hemispherical electrostatic monochromator. From these values and kinetic data for heats of formation of the radicals, ionic heats of formation for C1—C4 alkyl ions have been calculated. New values for the four isomeric butyl ions are given. The ionization efficiency curves for the simpler radicals show linear sections corresponding to excitation of vibrational levels; for larger radicals these segments are not resolved and only a smooth upward curvature is seen. In disagreement with earlier results, no evidence for formation of low-lying excited states of the ions could be found, either for parent or fragment ions.

Free radicals by mass spectrometry, XLVII. lonization potentials and ionic heats of formation of C5–C7 alkyl radicals

1976 ◽  
Vol 54 (6) ◽  
pp. 990-992 ◽  
Author(s):  
F. P. Lossing ◽  
Allan Maccoll
Keyword(s):  
Mass Spectrometry ◽  
Electron Beam ◽  
Free Radicals ◽  
Ionization Potentials ◽  
Heats Of Formation ◽  
Alkyl Radicals ◽  
Hydride Ion

Using an energy-resolved electron beam, ionization potentials have been measured for a number of C5–C7 isomeric alkyl radicals, produced by pyrolysis of nitrite intermediates. Values for primary radicals, which could not be produced in sufficient yield, are estimated by extrapolation from lower members of the series. Ionic heats of formation and hydride ion affinities are reported.

Heats of formation of some simple alkyl radicals

1982 ◽  
Vol 104 (13) ◽  
pp. 3655-3659 ◽  
Author(s):  
A. L. Castelhano ◽  
D. Griller
Keyword(s):  
Heats Of Formation ◽  
Alkyl Radicals
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