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Cross‐reaction and cross‐combination ratios
Author(s) -
Arthur Neville L.,
Christie John R.
Publication year - 1987
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550190309
Subject(s) - radical , chemistry , collision , mass ratio , computational chemistry , organic chemistry , physics , computer security , astrophysics , computer science
A simple collision theory model for reaction between two different radicals shows that the cross‐reaction ratio, ϕ*, is 2 only if the masses and collision diameters of the radicals are identical; for all other combinations of mass and size, ϕ* is greater than 2. The value of ϕ* is shown to depend simply on the ratios of the masses and diameters of the two radicals: which of the two is the heavier or larger is unimportant. Calculated and experimental values of ϕ* are compared for several systems involving small alkyl and fluoroalkyl radicals, and the relationship between ϕ* and ϕ, the cross‐combination ratio, is discussed.