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From Gas‐Phase to Liquid‐Water Chemical Reactions: The Fluorine Atom Plus Water Trimer System
Author(s) -
Li Guoliang,
Li QianShu,
Xie Yaoming,
Schaefer Henry F.
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201505075
Subject(s) - chemistry , trimer , tetramer , fluorine , chemical reaction , gas phase , crystallography , dimer , organic chemistry , enzyme
The potential energy profile for the F+(H 2 O) 3 →HF+(H 2 O) 2 OH reaction has been investigated using the “gold standard” CCSD(T) method with correlation‐consistent basis sets up to cc‐pVQZ. Four different reaction pathways have been found and these are related, both geometrically and energetically. The entrance complexes F⋅⋅⋅(H 2 O) 3 for all four reaction pathways are found lying ca. 7 kcal mol −1 below the separated reactants F+(H 2 O) 3 . The four reaction barriers on their respective reaction coordinates lie ca. 4 kcal mol −1 below the reactants. There are also corresponding exit complexes HF⋅⋅⋅(H 2 O) 2 OH, lying about 13 kcal mol −1 below the separated products HF+(H 2 O) 2 OH. Compared with analogous F+(H 2 O) 2 and F+H 2 O reactions, the F+(H 2 O) 3 reaction is somewhat similar to the former but qualitatively different from the latter. It may be reasonable to predict that the reactions between atomic fluorine and water tetramer (or even larger water clusters) may be similar to the F+(H 2 O) 3 reaction.