Heats of Formation of XeF₃⁺, XeF₃⁻, XeF₅⁺, XeF₇⁺, XeF₇⁻,and XeF₈ from High Level Electronic Structure Calculations
Atomization energies at 0 K and heats of formation at 0 and 298 K are predicted for XeF₃⁺, XeF₃⁻, XeF₅⁺, XeF₇⁻, and XeF₈ from coupled cluster theory (CCSD(T)) calculations with effective core potential correlation-consistent basis sets for Xe and including correlation of the nearest core electrons. Additional corrections are included to achieve near chemical accuracy of ±1 kcal/mol. Vibrational zero point energies were computed at the MP2 level of theory. Unlike the other neutral xenon fluorides, XeF₈ is predicted to be thermodynamically unstable with respect to loss of F₂ with the reaction calculated to be exothermic by 22.3 kcal/mol at 0 K. XeF₇⁺ is also predicted to be thermodynamically unstable with respect to the loss of F₂ by 24.1 kcal/mol at 0 K. For XeF₃⁺, XeF₅⁺, XeF₃⁻, XeF₅⁻ and XeF₇⁻, the reactions for loss of F₂ are endothermic by 14.8, 37.8, 38.2, 59.6, and 31.9 kcal/mol at 0 K, respectively. The F⁻ affinities of Xe, XeF₂, XeF₄, and XeF₆ are predicted to be 165.1, 155.3, 172.7, and 132.5 kcal/mol, and the corresponding F⁻ affinities are 6.3, 19.9, 59.1, and 75.0 kcal/mol at 0 K, respectively.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1001469
- Journal Information:
- Inorganic Chemistry, 49(1):261-270, Vol. 49, Issue 1; ISSN 0020-1669
- Country of Publication:
- United States
- Language:
- English
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