
TY  - JOUR
A1  - Harland, PW 
A1  - Kim, ND 
A1  - Petrie, SAH 
T1  - Kinetic and Electron Impact Studies of the Hco<sup>+</sup>/COH<sup>+</sup> Isomers
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 989
VL  - 42
IS  - 1
SP  - 9
EP  - 15
KW  - 
UR  - https://doi.org/10.1071/CH9890009 
N2  - The ionization efficiency curve for the CHO+ ion, m/z 29, formed from the near-monochromatic electron impact ionization of CH3OH has been found to exhibit two distinct appearance energies (thresholds) which can be assigned to the formyl, HCO+, and the higher energy isoformyl, COH+, isomers. The energy separation between the appearance energies of 138 kJ mol-1 provides an estimate of the difference between the enthalpies of formation of the formyl-isoformyl isomers. Acetaldehyde undergoes dissociative ionization to yield only the lower energy, formyl, isomer. This has been confirmed from a study of the energetics of the proton transfer reaction of CHO+ on N2O over the centre-of-mass collision energy range 0.3-4 eV measured by using a drift-tube mass spectrometer. 
ER  -

