
(a)
Interpretation:
Major and minor product should be drawn for the given substrates during E2 elimination reaction.
Concept introduction:
- Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base. Elimination reactions are two types, E1 and E2.
- E1 reaction: elimination follows stepwise mechanism.
- E2 reaction: elimination follows concerted pathway of mechanism.
- Elimination of compound in presence of bulky base leads to less substituted
alkene , in presence of strong base (not bulky) leads to more substituted alkene.
(b)
Interpretation:
Major and minor product should be drawn for the given substrates during E2 elimination reaction.
Concept introduction:
- Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base. Elimination reactions are two types, E1 and E2.
- E1 reaction: elimination follows stepwise mechanism.
- E2 reaction: elimination follows concerted pathway of mechanism.
- Elimination of compound in presence of bulky base leads to less substituted alkene, in presence of strong base (not bulky) leads to more substituted alkene.
(c)
Interpretation:
Major and minor product should be drawn for the given substrates during E2 elimination reaction.
Concept introduction:
- Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base. Elimination reactions are two types, E1 and E2.
- E1 reaction: elimination follows stepwise mechanism.
- E2 reaction: elimination follows concerted pathway of mechanism.
- Elimination of compound in presence of bulky base leads to less substituted alkene, in presence of strong base (not bulky) leads to more substituted alkene.
(d)
Interpretation:
Major and minor product should be drawn for the given substrates during E2 elimination reaction.
Concept introduction:
- Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base. Elimination reactions are two types, E1 and E2.
- E1 reaction: elimination follows stepwise mechanism.
- E2 reaction: elimination follows concerted pathway of mechanism.
- Elimination of compound in presence of bulky base leads to less substituted alkene, in presence of strong base (not bulky) leads to more substituted alkene.
(e)
Interpretation:
Major and minor product should be drawn for the given substrates during E2 elimination reaction.
Concept introduction:
- Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base. Elimination reactions are two types, E1 and E2.
- E1 reaction: elimination follows stepwise mechanism.
- E2 reaction: elimination follows concerted pathway of mechanism.
- Elimination of compound in presence of bulky base leads to less substituted alkene, in presence of strong base (not bulky) leads to more substituted alkene.
(f)
Interpretation:
Major and minor product should be drawn for the given substrates during E2 elimination reaction.
Concept introduction:
- Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base. Elimination reactions are two types, E1 and E2.
- E1 reaction: elimination follows stepwise mechanism.
- E2 reaction: elimination follows concerted pathway of mechanism.
- Elimination of compound in presence of bulky base leads to less substituted alkene, in presence of strong base (not bulky) leads to more substituted alkene.

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Chapter 8 Solutions
Organic Chemistry
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