Posted on July 21, 2022
Let’s think about two limiting cases. If the concentration of Cldos is low relative to CHcuatro (in other words, Cl2 is our limiting reagent) then the rate of Propagation Step #2 will slow down as its concentration decreases. Without any Cl2 to react with, our •CHstep three radicals can just combine with another free radical (such as •Cl) to give CH3Cl, for example. There is essentially no barrier to this reaction. Note that here the number of free radicals decreases from 2 to zero. This is called termination.
8. Summary: Free-Revolutionary Replacement Responses
The bottom line the following is you to by relying the amount of radicals composed or shed from inside the each step of the process, you might determine if the newest step try initiation, propagation, otherwise termination. (more…)