Effect of kinetic and electronic energy on the reactions of Fe/sup +/ with H/sub 2/, HD, and D/sub 2/: state-specific cross sections for Fe/sup +/(/sup 6/D) and Fe/sup +/(/sup 4/F)

Journal Article · Thu Oct 23 04:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100280a054· OSTI ID:6962156

Elkind, J L; Armentrout, P B

Reactions of atomic iron ions with H/sub 2/, HD, and D/sub 2/ have been examined by using guided ion beam mass spectrometry. Individual reaction cross sections for the ground and first excited electronic states of Fe/sup +/ are determined by utilizing three different ion sources. The ground state, Fe/sup +/(/sup 6/D), is found to be relatively unreactive and, in reaction with HD, greatly favors production of FeD/sup +/. In contrast, the first excited state, Fe/sup +/(/sup 4/F), reacts efficiently and forms approx. =4 times as much FeH/sup +/ as FeD/sup +/ in reaction with HD. This disparate behavior is compared with that of their atomic transition-metal ions and is explained by using simple molecular orbital concepts. The results are analyzed to yield a bond dissociation energy at 0 K for FeH/sup +/ of 2.12 +/- 0.06 eV (48.9 +/- 1.4 kcal/mol).

• Research Organization: Univ. of California, Berkeley
• OSTI ID: 6962156
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:22; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
CROSS SECTIONS
DATA
DEUTERIDES
DEUTERIUM COMPOUNDS
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
HYDROGEN DEUTERIDE
INFORMATION
IONS
IRON COMPOUNDS
ISOTOPE EFFECTS
MASS SPECTROSCOPY
NUMERICAL DATA
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS