E1 vs. E2 Elimination Reactions
|
S. No. |
E1 elimination Reaction |
E2 elimination Reaction |
| 1. | Unimolecular (Rate of reaction depends on one molecule that is alkyl halide) | Bimolecular (Rate of reaction depends on two molecules that is alkyl halide and base) |
| 2. | First order of reaction | Second order of reaction |
| 3. | Two step reaction | One step reaction |
| 4. | Involves weak base like n-BuOH | Involves strong base like C2H5O– |
| 5. | Rearrangement of intermediate carbocation possible | Rearrangement of carbocation is not possible (Single step reaction) |
| 6. | Order of alkyl halide reactivity 3o>2o>1o | Order of alkyl halide reactivity 3o>2o>1o7 |
| 7. | Specific stereochemistry not required | Leaving group must be anti to hydrogen removed |
