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- W2020916094 abstract "The proton transfer between the protonated arene (arenium) and the neutral arene rings of protonated tribenzylmethane (8), tetrabenzylmethane (9), several higher triphenylisoalkylalkanes (10–12) as well as of protonated 2-benzylindane (13) and 2,2-dibenzylindane (14) has been studied in detail. In all regimes of the ions’ lifetimes (ion source, first and second field-free region), the interannular proton exchange leads to complete equilibration. As an extreme, 21 protons are randomized in protonated tetrabenzylmethane 9 prior to fragmentation within ∼1 μs. The hydrogens of the aliphatic or alicyclic spacer do not participate in the exchange process. The interannular proton exchange is independent of the fragmentation path; both single and twofold loss of benzene from 8 and protonated tris(β-phenylethyl)methane 12 are preceded by complete proton equilibration between all of the rings. The individual proton transfer rate for 9 is estimated to be >108 s−1, and the readiness of proton equilibration is assigned to the efficient internal solvation, or spectator ring effects, in these large alkylbenzenium ions, possibly giving rise to a merge between the numerous inter- and intra-annular proton transfer steps during the ions’ lifetime." @default.
- W2020916094 created "2016-06-24" @default.
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- W2020916094 date "1998-11-01" @default.
- W2020916094 modified "2023-10-12" @default.
- W2020916094 title "Mobile protons in large gaseous alkylbenzenium ions. The 21-proton equilibration in protonated tetrabenzylmethane and related “proton dances”" @default.
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- W2020916094 doi "https://doi.org/10.1016/s1387-3806(98)14168-4" @default.
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