Mechanisms
• The next 2 examples of substitution rxns proceed by different mechanisms.
• These mechanisms were determined by looking at the observed products and studying the reaction kinetics.
eg1
CH4 +
Cl-Cl (hu) ® CH3Cl
+ HCl
eg2 CH3CH2Cl + Na+I- ® CH3CH2I + Na+Cl-
To
describe the differences between such mechanisms we will need some new terminology.