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- W2023554297 abstract "Abstract Gas phase standard state (298.15 K, 1 atm) enthalpies (Δ acid H ° (g) ) and free energies (Δ acid G ° (g) ) of acid dissociation were calculated at the Gaussian-4 (G4) and W1BD levels of theory for a range of perproteated, perdeuterated, pertritiated, and partially isotopically labeled main group mono- and polyhydrides, carbon acids, and oxyacids. Excellent agreement was obtained between the available experimental datasets and the theoretical estimates, with effectively equivalent Δ acid H ° (g) /Δ acid G ° (g) prediction accuracy for the G4 and W1BD methods on carbon acids and oxyacids. The W1BD level of theory provided Δ acid H ° (g) /Δ acid G ° (g) errors about one-half those of the G4 method on main group hydrides. G4 and W1BD predicted primary and secondary equilibrium isotope effects (EIEs) on gas phase acidity for deuterium and tritium substitution exhibit periodic trends among the main group hydrides, as well as acid strength and structure–property relationships for some groups of carbon acids and oxyacids. Primary EIEs calculated at the W1BD level for various isotopologues of the H 2 , LiH, CH 4 , NH 3 , SiH 4 , SH 2 , and ClH main group hydrides using the major isotopes for each non-protic element declined in magnitude with increasing atomic number due to decreasing mass differences between the respective isotopologues." @default.
- W2023554297 created "2016-06-24" @default.
- W2023554297 creator A5051836241 @default.
- W2023554297 creator A5056894201 @default.
- W2023554297 date "2010-09-01" @default.
- W2023554297 modified "2023-10-16" @default.
- W2023554297 title "Gas phase acidities and associated equilibrium isotope effects for selected main group mono- and polyhydrides, carbon acids, and oxyacids: A G4 and W1BD study" @default.
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