Thermochemistry of uranium halide ions. Reactions of U/sup +/ with CH/sub 3/F, SiF/sub 4/, CH/sub 3/Cl, and CCl/sub 4/

Journal Article · Thu Dec 24 04:00:00 EST 1981 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150626a030· OSTI ID:6786068

Armentrout, P B; Beauchamp, J L

An ion beam apparatus was used to examine the reactions of U/sup +/ with CH/sub 3/F, SiF/sub 4/, CH/sub 3/Cl, and CCl/sub 4/. Reaction with the methyl halides to yield UX/sup +/ is exothermic for both X = F and Cl. Reaction with the tetrahalides yields both UX/sup +/ and UX/sub 2//sup +/. With CCl/sub 4/, these processes are exothermic while with SiF/sub 4/, they are endothermic. Interpretation of the threshold for UF/sup +/ formation from SiF/sub 4/ allows the values D/sup 0/(U/sup +/-F) = 113 +/- 12 kcal/mol and ..delta..H/sub f//sup 0/(UF/sup +/) = 177 +/- 13 kcal/mol to be derived. When an estimate of 6.7 +/- 1 eV is used for the ionization potential of uranium monofluoride, ..delta..H/sub f//sup 0/(UF) = 22 +/- 27 kcal/mol and D/sup 0/(U-F) = 125 +/- 27 kcal/mol are also derived.

• Research Organization: California Inst. of Tech., Pasadena
• OSTI ID: 6786068
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 85:26; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
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ACTINIDE COMPOUNDS
BINDING ENERGY
CARBON TETRACHLORIDE
CHEMICAL REACTIONS
CHLORINATED ALIPHATIC HYDROCARBONS
CORRELATION FUNCTIONS
CROSS SECTIONS
DATA
ENERGY
ENERGY RANGE
EQUATIONS
EV RANGE
EXPERIMENTAL DATA
FLUORIDES
FLUORINATED ALIPHATIC HYDROCARBONS
FLUORINE COMPOUNDS
FUNCTIONS
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
INFORMATION
IONIZATION POTENTIAL
KINETICS
LANGEVIN EQUATION
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
SILICON COMPOUNDS
SILICON FLUORIDES
THERMODYNAMICS
THRESHOLD ENERGY
URANIUM COMPOUNDS