Mass Spectrometric Observation of Electron and Proton Transfer Reactions between Positive Ions and Neutral Molecules. Part II

Journal Article · Tue Jan 01 00:00:00 EST 1963 · Zeitschrift fuer Naturforschung. A: Physical Sciences

DOI:https://doi.org/10.1515/zna-1963-0611· OSTI ID:4647211

Henglein, A.; Muccini, G. A.

The method of Cermak and Herman has been applied to studies of unsymmetrical charge and proton transfer reactions. If the charge is transferred between atoms low cross sections are observed since part of the kinetic energy of the reacting system has to be converted into internal energy of the reactants. Large cross sections, however, have been found for the charge transfer between polyatomic species where apparently no resonance restriction exists. In several instances the unsymmetrical transfer B Kr NO have also been observed. The results indicate that the doubly charged ion generally captures the electron into a high lying orbital. Protonated cyclopropane is shown to be readily formed in ionized cyclopropane. In mixtures of water and methane, proton transfer has been observed in both directions. A large isotope effect on the secondary ion currents resulting from the transfer of a deuteron or a proton has been found in several simple systems. This isotope effect appears only if the secondary ions are observed in the Cermak—Herman method and is not found in the conventional operating of the ion source where reactions of slow ions predominate. This information provides some insite into the mechanistic details of the proton transfer since little isotope effect is expected if the reaction occurs via an inelastic collision complex while an isotope effect of the order of magnitude observed here is predicted by a stripping model.

• Research Organization: Mellon Inst., Pittsburgh; Hahn-Meitner-Institut fur Kernforschung, Berlin
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-034646
• OSTI ID: 4647211
• Report Number(s): RRL-110; 0372-9516
• Journal Information: Zeitschrift fuer Naturforschung. A: Physical Sciences, Vol. 18, Issue 6; Other Information: RRL-110. Orig. Receipt Date: 31-DEC-63; ISSN 0932-0784
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

PHYSICS
ATOMIC MODELS
ATOMS
BINDING ENERGY
CAPTURE
CHEMICAL REACTIONS
CONVERSION
CROSS SECTIONS
CURRENTS
CYCLOALKANES
DEUTERONS
ELECTRIC CHARGES
ELECTRONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
HALF-LIFE
HYDROGEN
INTERACTIONS
ION SOURCES
IONIZATION
IONS
ISOTOPE EFFECTS
KRYPTON
MASS SPECTROMETERS
MEASURED VALUES
METHANE
MIXING
MOLECULES
NITROGEN
NITROGEN OXIDES
OPERATION
ORBITS
OXYGEN
PROPANE
PROTONS
RESONANCE
WATER