Substituent effects in unimolecular ion decompositions. VIII. Rearrangement ions in the mass spectra of substituted phenyl methyl ethers

1968 ◽  
Vol 33 (1) ◽  
pp. 124-127 ◽  
Author(s):  
Fred W. McLafferty ◽  
Maurice M. Bursey
Keyword(s):  
Mass Spectra ◽  
Substituent Effects

Substituent effects in mass spectra of monosubstituted benzils

1975 ◽  
Vol 10 (4) ◽  
pp. 295-312 ◽  
Author(s):  
Kenneth E. Richards ◽  
Blair N. McMaster ◽  
Graeme J. Wright
Keyword(s):  
Mass Spectra ◽  
Substituent Effects

Substituent effects in the mass spectra of diethyl phenyl phosphates

1989 ◽  
Vol 24 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Concetta Kascheres ◽  
Mirtes Sintoni
Keyword(s):  
Mass Spectra ◽  
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.

Benzo[c]cinnoline derivatives. IV. Substituent effects in the mass spectra of substituted Benzo[c]cinnolines

1968 ◽  
Vol 21 (5) ◽  
pp. 1233 ◽  
Author(s):  
JH Bowie ◽  
GE Lewis ◽  
JA Reiss
Keyword(s):  
Mass Spectra ◽  
Substituent Effects ◽  
Molecular Ions ◽  
Proximity Effects ◽  
Skeletal Rearrangement ◽  
Fragmentation Processes

The mass spectra of a series of benzo[c]cinnoline derivatives are reported and discussed. The spectra are useful for analytical purposes, as all compounds give pronounced molecular ions, and the fragmentation processes generally occur without skeletal-rearrangement. Many benzo[c]cinnolines which are substituted in the 4-position may be differentiated from other isomers by the presence of "proximity- effects" in their mass spectra.

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