Evaluation of the cross-termination parameter

Once ri, r2, fij, and 52 are determined, it is then possible to determine 0 by substitution into eqn. (219). Table 24 summarizes some values obtained in the co-oxidation of cumene with various hydrocarbons. The term 0 has been defined such that it is expected to equal 2 because of the statistical advantage of the bimolecular reaction between different species. Thus, in the reaction of cumene with a-methylstyrene, where the selftermination rate coefficients are nearly identical, the value of 0 is 2. However, for the other hydrocarbons, all of which form peroxy radicals that terminate much faster than cumene, 0 is much greater than 2. 

The cross-termination rate coefficients between secondary and tertiary peroxy radicals are expected to approximate the self-termination rate 

Cross-termination parameters, 0, for co-oxidation of hydrocarbons with cumene 

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