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- W2040602666 abstract "Collision-induced dissociation (CID) of the radical cation H2SO 4 + gives the product pairs H2O++SO3 and HO+HSO 3 + with a 1:3 ratio that is essentially independent of collision energy. Statistical analysis of the two channels indicates that the proton affinity of HO is 3±4 kJ/mol lower than that of SO3. This can be used to derive PA(SO3)=591±4 kJ/mol at 0 K and 596±4 kJ/mol at 298 K. Previously, Munson and Smith bracketed the proton affinity as PA(HBr)=584 kJ/mol<PA(SO3)<PA(CO)=594 kJ/mol. The threshold of 152±16 kJ/mol for formation of H2O++SO3 indicates that the barrier to CID is small or nonexistent, in contrast to the substantial barriers to decomposition for H3SO 4 + and H2SO4." @default.
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- W2040602666 date "1999-09-01" @default.
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- W2040602666 title "Proton affinity of SO3" @default.
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- W2040602666 doi "https://doi.org/10.1016/s1044-0305(99)00055-0" @default.
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