Mass spectrometry. XXX. Substituent effects of mass spectrometry. Comparison of change localization and quasi-equilibrium theories

1968 ◽  
Vol 90 (20) ◽  
pp. 5461-5465 ◽  
Author(s):  
Ian. Howe ◽  
Dudley H. Williams
Keyword(s):  
Mass Spectrometry ◽  
Substituent Effects ◽  
Quasi Equilibrium

Electronic substituent effects in the electron impact mass spectrometry of 2-(arylazo)-4-phenylphenols

2005 ◽  
Vol 19 (18) ◽  
pp. 2563-2568 ◽  
Author(s):  
Guadalupe Pérez-Caballero ◽  
Federico Jiménez-Cruz ◽  
Pablo Hernández Matamoros ◽  
José Guadalupe García ◽  
Fernando Cortés-Guzmán ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Electron Impact ◽  
Substituent Effects ◽  
Electron Impact Mass Spectrometry ◽  
Electron Impact Mass ◽  
Impact Mass

Substituent effects in mass spectrometry

1968 ◽  
pp. 837 ◽  
Author(s):  
R. Graham Cooks ◽  
Robert S. Ward ◽  
Ian Howe ◽  
Dudley H. Williams
Keyword(s):  
Mass Spectrometry ◽  
Substituent Effects

ortho-Effects in Mass Spectra. Alteration of the Molecular-Ion Energy Distribution in Disubstituted Acetanilides

1972 ◽  
Vol 27 (4) ◽  
pp. 670-677 ◽  
Author(s):  
Steven Benezra ◽  
Maurice Bursey
Keyword(s):  
Excited State ◽  
Mass Spectra ◽  
Transition Probability ◽  
Substituent Effects ◽  
Quasi Equilibrium ◽  
Ion Energy ◽  
Ion Energy Distribution ◽  
Molecular Ion ◽  
Equilibrium Calculations ◽  
Excitation Probability

Abstract Simplified quasi-equilibrium calculations performed on the mass spectra of dihalosubstituted phenyl acetates and acetanilides again uncover the same substituent effects on the rise of K with E for the loss of ketene from phenyl acetates as was determined for the monosubstituted phenyl acetates. However, a new effect is found for the disubstituted acetanilides, removal of excitation probability for low-lying energy states of the molecular ion. This effect parallels the removal of transition probability for the lowest excited state of the neutral molecule.

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