Determination of proton affinity from the kinetics of proton transfer reactions. III. The measurement of the equilibrium constant at various temperatures

1973 ◽  
Vol 59 (1) ◽  
pp. 61-69 ◽  
Author(s):  
R. S. Hemsworth ◽  
H. W. Rundle ◽  
D. K. Bohme ◽  
H. I. Schiff ◽  
D. B. Dunkin ◽  
...  
Keyword(s):  
Proton Transfer ◽  
Equilibrium Constant ◽  
Proton Affinity ◽  
Transfer Reactions ◽  
Proton Transfer Reactions ◽  
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.

A room-temperature study of the kinetics and energetics for the protonation of ethane

1981 ◽  
Vol 59 (12) ◽  
pp. 1771-1778 ◽  
Author(s):  
G. I. Mackay ◽  
H. I. Schiff ◽  
D. K. Bohme
Keyword(s):  
Proton Transfer ◽  
Proton Affinity ◽  
Room Temperature ◽  
Equilibrium Constants ◽  
Transfer Reactions ◽  
Ion Flow ◽  
Proton Transfer Reactions ◽  
Selected Ion Flow Tube ◽  
Reaction Channels ◽  
Kinetics Of

The flowing afterglow and selected-ion flow tube (SIFT) techniques have been applied in room-temperature measurements of the kinetics for proton-transfer reactions of ethane with HeH+, H3+, N2H+, CH5+, N2OH+, and HCO+. The fragmentation of C2H7+ was followed over a range in excess energy of l00 kcal mol−1. Equilibrium constants were measured at low excess energies for the proton-transfer reactions with HCO+ and N2OH+. The latter provided values for the proton affinity of ethane and ΔHf0(C2H7+) and, indirectly, values for the proton affinity of ethylene and ΔHf0 (C2H5+). Additional measurements of the kinetics of the reactions of C2H6 with H+ itself, O+, OH+, and H2O+ provided insight into the competition between proton-transfer and other reaction channels and the fragmentation associated with the C2H6+ ion.

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