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Effects of Bending Excitation on the Reaction of Chlorine Atoms with Methane
Author(s) -
Bechtel Hans A.,
Camden Jon P.,
Brown Davida J. Ankeny,
Martin Marion R.,
Zare Richard N.,
Vodopyanov Konstantin
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200462837
Subject(s) - excitation , bent molecular geometry , atomic physics , chemistry , methane , shearing (physics) , chlorine , bending , photochemistry , physics , organic chemistry , thermodynamics , quantum mechanics
Bent up energy : Contrary to intuitive expectations, excitation of the low‐frequency CH 4 (ν 4 =1) bending motion enhances the cross section for reaction with Cl atoms by a factor of two or more. This enhancement, which is constant over the collision energy range 0.12 eV to 0.26 eV, implies that shearing motion, in addition to stretching motion, can facilitate CH bond cleavage in this direct abstraction reaction (see scheme; green Cl, purple C, gray H).