Consider two alternative mechanism for the chlorination of methane. Which step is crucial in deciding which mechanism is not likely to be observed?
Mechanism I Mechanism II
A Cl2⟶2Cl∙
| A Cl2⟶2Cl∙
|
B Cl∙+CH4⟶HCl+∙CH3
| D Cl∙+CH4⟶CH3Cl+H∙
|
C ∙CH3+Cl2⟶CH3Cl+Cl∙
| E H∙+Cl2⟶HCl+Cl∙
|