Ion-molecule reactions of formic acid. I. Proton-transfer reactions

1978 ◽  
Vol 31 (10) ◽  
pp. 2157 ◽  
Author(s):  
CG Freeman ◽  
PW Harland ◽  
MJ McEwan
Keyword(s):  
Proton Transfer ◽  
Formic Acid ◽  
General Equation ◽  
Reasonable Agreement ◽  
Transfer Reactions ◽  
Rate Coefficients ◽  
Collision Rate ◽  
Dipole Orientation ◽  
Ion Molecule Reactions ◽  
Proton Transfer Reactions

Rate coefficients are reported for a number of proton-transfer reactions with formic acid. These reactions can be represented by the general equation �������������������������� XH++HCOOH → (HCOOH)H+ +X : (X = CH4, H2O, N2, CO, HCN, HCHO, CH3OH and H2S). Reasonable agreement was obtained between our observed results and predictions based on the average-dipole-orientation (ADO) model except that ADO theory may slightly underestimate the collision rate.

Proton Transfer Reactions between Methanol and Formic Acid Deposited on Free ArN Nanoparticles

2019 ◽  
Vol 123 (33) ◽  
pp. 7201-7209 ◽  
Author(s):  
Andriy Pysanenko ◽  
Francisco Gámez ◽  
Karolína Fárníková ◽  
Eva Pluhařová ◽  
Michal Fárník
Keyword(s):  
Proton Transfer ◽  
Formic Acid ◽  
Transfer Reactions ◽  
Proton Transfer Reactions

Field Induced Ion Molecule Reactions in Adsorbed Layers Studied by Pulsed Field Desorption

1974 ◽  
Vol 29 (2) ◽  
pp. 230-238 ◽  
Author(s):  
F. W. Röllgen ◽  
H. D. Beckey
Keyword(s):  
Proton Transfer ◽  
Ionization Potential ◽  
Chemical Interaction ◽  
Transition Probability ◽  
Transfer Reactions ◽  
Field Desorption ◽  
Pulsed Field ◽  
Ion Molecule Reactions ◽  
Adsorbed Layers ◽  
Proton Transfer Reactions

The formation of ions under field ionization conditions is partly due to ion molecule reactions in adsorbed layers on the emitter surface. In order to study these reactions a pulsed field desorption (PFD) technique was applied, by which ions resulting from these reactions are detected with high relative intensity. The PFD-mass spectra of some small organic molecules are discussed with respect to the principal reaction mechanisms and types of ions formed. It was found that if reactions involving chemical interaction with the surface are left out of consideration only proton transfer reactions are the primary processes. Desorption products resulting from proton transfer reactions are, for example, (M+H)+, (2M+H)+, (3M+H)+, (M+CH3)+ and (2M)+ ions in the case of methanol. The formation of complexes preceeding atom rearrangement reactions are suppressed by the high electric field and consequently could not be detected. Secondary reactions of the (M-H)•-radical lead to the elimination of H- from molecules and in certain cases to the formation of addition complexes. Field induced reactions were found to occur almost adiabatically, i.e. it is not necessary to supply the ionization potential of the proton donor in a proton transfer reaction. Products of reactions with ionization energies above the ionization potential of the molecules involved in the reaction are not observable. To a first approximation the electron transition probability for field reactions seems to be dependent on the energy of formation of the ions and not on the type of reaction.

Concertedness and solvent effects in multiple proton transfer reactions: The formic acid dimer in solution

2000 ◽  
Vol 112 (21) ◽  
pp. 9498-9508 ◽  
Author(s):  
J. Kohanoff ◽  
S. Koval ◽  
D. A. Estrin ◽  
D. Laria ◽  
Y. Abashkin
Keyword(s):  
Proton Transfer ◽  
Formic Acid ◽  
Solvent Effects ◽  
Transfer Reactions ◽  
Proton Transfer Reactions

Ion-molecule reactions of formic acid. II. Rearrangement reactions

1978 ◽  
Vol 31 (12) ◽  
pp. 2593 ◽  
Author(s):  
CG Freeman ◽  
PW Harland ◽  
MJ McEwan
Keyword(s):  
Charge Transfer ◽  
Formic Acid ◽  
General Equation ◽  
Rate Coefficients ◽  
Fragmentation Product ◽  
Ion Molecule Reactions ◽  
Positive Ions ◽  
Rearrangement Reactions

Rate coefficients for a number of rearrangement reactions of positive ions with HCOOH are reported. These reactions may be represented by the general equation �������������������������� Y+ + HCOOH → products Most reactant ions resulted in the fragmentation product HCO+ and five reactant ions, N+, O+, CN+, N2+ and CO+, were observed to have rate coefficients much greater than predicted by the ADO model. An explanation for the high rates observed for these reactant ions is proposed and involves dissociative charge transfer by a non-orbiting electron-jump mechanism.

Electrocatalytic hydrogenation of pyridinium enabled by surface proton transfer reactions

2017 ◽  
Vol 7 (4) ◽  
pp. 831-837 ◽  
Author(s):  
C. X. Kronawitter ◽  
Z. Chen ◽  
P. Zhao ◽  
X. Yang ◽  
B. E. Koel
Keyword(s):  
Carbon Dioxide ◽  
Proton Transfer ◽  
Formic Acid ◽  
Selective Reduction ◽  
Transfer Reactions ◽  
Electrocatalytic Hydrogenation ◽  
Pt Electrodes ◽  
Proton Transfer Reactions ◽  
First Time

It is observed for the first time that pyridinium is hydrogenated at Pt electrodes in electrochemical conditions consistent with those previously shown to yield selective reduction of carbon dioxide to methanol and formic acid.

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