Ion-beam studies of reactions of atomic transition metal ions with alkanes and other molecules

Miscellaneous · Fri Jan 01 00:00:00 EST 1988

OSTI ID:7006409

Georgiadis, R M

Guided ion beam mass spectrometry is used to investigated the kinetic energy dependence of a number of reactions of atomic transition metal ions with a variety of alkanes and other molecules. The reaction of ground state Co{sup +}, Ni{sup +}, Cu{sup +} and Zn{sup +} with a series of alkanes studied. Thermodynamic information is derived for ionic and neutral M-CH{sub 3} and M-H bond dissociation energies. Periodic trends in the thermochemical results are used to assess the effect of orbital occupation and electronic charge of the metal as well as the nature and polarizability of the ligand on transition metal bonding. The isotopic effects of the reactions of ground state Ca{sup +} and Zn{sup +} with H{sub 2}, HD and D{sub 2} are examined. Ca{sup +} is found to react by a direct mechanism while Zn{sup +} via a pairwise interaction. These results clearly demonstrate the effect of occupation and relative energy of the 4s and 3d orbitals in determining ion reactivity and can be understood and predicted using molecular orbital concepts. The electronic state dependence of the reaction of Cr{sup +} with methane is studied.

• Research Organization: California Univ., Berkeley, CA (USA)
• OSTI ID: 7006409
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
COBALT IONS
THERMOCHEMICAL PROCESSES
COPPER IONS
NICKEL IONS
TRANSITION ELEMENTS
CHEMICAL REACTION KINETICS
ZINC IONS
ALKANES
CALCULATION METHODS
DATA ANALYSIS
DISSOCIATION ENERGY
EXPERIMENTAL DATA
ION BEAMS
MASS SPECTROSCOPY
MEASURING INSTRUMENTS
MEASURING METHODS
BEAMS
CHARGED PARTICLES
DATA
ELEMENTS
ENERGY
HYDROCARBONS
INFORMATION
IONS
KINETICS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
REACTION KINETICS
SPECTROSCOPY
400202* - Isotope Effects
Isotope Exchange
& Isotope Separation
360104 - Metals & Alloys- Physical Properties