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- W2078587976 abstract "Abstract The hydration energies of four basic ions Sc + , ScO + , ScOH + and Sc(OH) 2 + , and proton affinities for various neutral Sc species, which might exist in flames doped with Sc, were studied with density functional methods. Two functionals, B3LYP and BP86, equipped with two basis sets, TZVP and 6-311++G(3df,3pd), were employed. The geometries and frequencies from the four methods are very similar. The hydration energies from the four methods differ by 0–13 kcal/mol because the functional effect and the basis set effect behave very differently for H 2 O and the Sc species. With our preferred A2 method B3LYP/6-311++G(3df,3pd), the theoretical hydration energy is ∼37 kcal/mol for monohydrates, ∼68 kcal/mol for dihydrates and ∼101 kcal/mol for trihydrates at 298.15 K. The proton affinities for most scandium species (200–250 kcal/mol) such as Sc, ScO, ScOH, HScO, OScO, OScOH, Sc(OH) 2 and Sc(OH) 3 are much higher than the proton affinity of H 2 O (165.2 kcal/mol). These results indicate that chemical ionisation by proton transfer may play an important role for ionisation in flames doped with Sc." @default.
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- W2078587976 date "2001-08-01" @default.
- W2078587976 modified "2023-09-24" @default.
- W2078587976 title "A density functional study of the hydration energies and proton affinities of some scandium compounds with hydrogen and oxygen" @default.
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- W2078587976 doi "https://doi.org/10.1016/s0166-1280(01)00563-2" @default.
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