Comparative Details Of E1 And E2 Reactions
Alkyl and Aryl Halides of Class 12
| E1 reaction | E2 reaction | |
| (a) Steps |
(i)
(ii) |
 |
| (b) Transition state |
(i)
(ii) |
 |
| (c) Kinetics | First order, unimolecular Rate = k1[RX of ionization | Second−order, bimolecular Rate = k2[RX][:B&m/p> |
| (d) Driving force | Ionization of R − X | Attack by B:− on H |
| (e) Stere− ospecifici | Non−stereospecific | Anti elimination |
| (f) Effect of R | Stability of R+ 3° > 2gt; 1° RX | Alkene stability (Saytzeff Rule) |
| (g) Rearr− angeme | Common | None |
| (h) Regios− electivity | Saytzeff | Usually, Saytzeff but Hofmann with bulky bases (Me3CO−) |
| (i) Alkyl group | 3° > 2° > 1° | 3° > 2° > 1° |
| (j) Base strength | Weak | Strong |
| (k) Leaving group | Weak base favours reaction I− > Br− − > F− | Weak base favoures reaction I− > Br− − > F− |
| (l) Catalysis | Ag+, AlCl3 | No specific catalyst |
- Alkyl Halides
- Methods Of Preparation Of Alkyl Halides
- General Physical Properties Of The Alkyl Halides
- General Chemical Properties Of The Alkyl Halides For Class 12
- Aliphatic Nucleophilic Substitution
- Comparative Details Of E1 And E2 Reactions
- Comparartive Details Of E2 And SN2 Reactions
- Comparative Details Of E2 And SN1 Reactions
- Aryl Halides
- Preparartion Of Aryl Halides
- General Chemical Properties Of The Aryl Halides
- Exercise 1
- Exercise 2
- Exercise 3
