Kinetics of symmetric proton transfer reactions in alcohols and amines by ion cyclotron resonance spectroscopy. Relaxation mechanisms for epithermal ion energy distributions

1977 ◽  
Vol 81 (7) ◽  
pp. 593-598 ◽  
Author(s):  
T. B. McMahon ◽  
J. L. Beauchamp
Keyword(s):  
Proton Transfer ◽  
Cyclotron Resonance ◽  
Transfer Reactions ◽  
Resonance Spectroscopy ◽  
Ion Cyclotron Resonance ◽  
Energy Distributions ◽  
Ion Energy ◽  
Proton Transfer Reactions ◽  
Ion Energy Distributions ◽  
Kinetics Of

Gas-Phase Basicity of Formaldehyde by the Thermokinetic Method

2000 ◽  
Vol 6 (2) ◽  
pp. 109-112 ◽  
Author(s):  
Guy Bouchoux ◽  
Danielle Leblanc
Keyword(s):  
Fourier Transform ◽  
Proton Transfer ◽  
Equilibrium Constant ◽  
Gas Phase ◽  
Cyclotron Resonance ◽  
Transfer Reactions ◽  
Ion Cyclotron Resonance ◽  
Proton Transfer Reactions ◽  
Ft Icr

A series of proton transfer reactions monitored in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer allows the determination of the gas-phase basicity ( GB) and the proton affinity ( PA) of formaldehyde. The values determined by the thermokinetic method, GB(CH2O) = 681.5 ± 0.7 kJ mol−1 and PA(CH2O) = 711.5 ± 2.1 kJ mol−1 are in excellent agreement with data originating from proton transfer equilibrium constant determinations or from G2 calculations.

Gas phase basicity of dihydropyran and dihydro-1,4-dioxin

1986 ◽  
Vol 64 (7) ◽  
pp. 1295-1297 ◽  
Author(s):  
G. Bouchoux ◽  
I. Hanna ◽  
R. Houriet ◽  
E. Rolli
Keyword(s):  
Double Bond ◽  
Proton Transfer ◽  
Gas Phase ◽  
Molecular Orbital ◽  
Cyclotron Resonance ◽  
Transfer Reactions ◽  
Molecular Orbital Calculations ◽  
Ion Cyclotron Resonance ◽  
Lower Reactivity ◽  
Proton Transfer Reactions

The gas phase basicity (GB) of dihydropyran 1 and dihydro-1,4-dioxin 2 is measured in equilibrium proton transfer reactions conducted in an ion cyclotron resonance spectrometer. GB(1) is found to be greater than GB(2) by 37 kJ mol−1, this difference parallels the lower reactivity of 2 observed in solution under acidic condition. Conclusion as to the favoured protonation of the C—C double bond, giving rise for both 1 and 2 to oxycarbonium cations, is drawn from comparison with analogous compounds and substantiated by molecular orbital calculations (MNDO) on the protonated structures.

Kinetics of Proton-transfer Reactions

Nature ◽  
1967 ◽  
Vol 213 (5071) ◽  
pp. 65-66 ◽  
Author(s):  
G. C. BARKER ◽  
D. C. SAMMON
Keyword(s):  
Proton Transfer ◽  
Transfer Reactions ◽  
Proton Transfer Reactions ◽  
Kinetics Of
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