Hydrogen-atom and charge transfer reactions within acetylene/methanol and ethylene/methanol heteroclusters

Reactions that proceed within mixed acetylene-methanol and ethylene-methanol cluster ions were studied using an electron-impact time-of-flight mass spectrometer. When acetylene and methanol seeded in helium are expanded and ionized by electron impact, the ion abundance ratio, [CH3OH+]/[CH2OH+], shows a propensity to increase as the acetylene/methanol mixing ratio increases, indicating that the initially ionized acetylene ion transfers its charge to adjacent methanol molecules within the clusters. Investigations on the relative cluster ion intensity distributions of [CH3OH2+]/[CH3OH+] and [(CH3OHH+]/[CH3OH . CH2OH+] under various experimental conditions suggest that hydrogen-atom abstraction reaction of acetylene molecule with CH3OH ion is responsible for the effective formation of CH2OH ion. In ethylene/methanol clusters, the intensity ratio of [CH3OH2]/[CH3OH] increases linearly as the relative concentration of methanol decreases. The prominent ion intensities of (CH3OH)mH over (CH3OH)(m-1)CH2OH ions (m=1, 2, and 3) at all mixing ratios are also interpreted as a consequence of hydrogen atom transfer reaction between C2H4 and CH3OH to produce the protonated methanol cluster ions.
Publisher
KOREAN CHEMICAL SOC
Issue Date
1996-10
Language
ENG
Keywords

ELECTRON-IMPACT IONIZATION; ION-MOLECULE REACTIONS; ETHYLENE METHANOL HETEROCLUSTERS; PROTON-TRANSFER REACTIONS; CLUSTER IONS; SOLVATION; THERMOCHEMISTRY; DISSOCIATION; DYNAMICS; WATER

Citation

BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.17, no.10, pp.939 - 943

ISSN
0253-2964
URI
http://hdl.handle.net/10203/73249
Appears in Collection
CH-Journal Papers(저널논문)
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