Chapter 8.10, Problem 34PTS

(a)

Interpretation Introduction

Interpretation:

Mechanism pathway should be predicted and mechanism should be drawn for the given elimination reaction.

Concept introduction:

• Mechanism: mechanism describes the reaction path and process. In reaction mechanism, curved arrows are used to show the electron transfer from one group to another.
• Curved arrow direction should be from lone pair electrons to electron deficient species such as carbocation etc.
• Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base.
• 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.
• Dehydration and dehydro halogenation process takes place in presence of acid then gentle heat applied to the substrate.

(b)

Interpretation Introduction

Interpretation:

Mechanism pathway should be predicted and mechanism should be drawn for the given elimination reaction.

Concept introduction:

• Mechanism: mechanism describes the reaction path and process. In reaction mechanism, curved arrows are used to show the electron transfer from one group to another.
• Curved arrow direction should be from lone pair electrons to electron deficient species such as carbocation etc.
• Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base.
• 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.
• Dehydration and dehydro halogenation process takes place in presence of acid then gentle heat applied to the substrate.

(c)

Interpretation Introduction

Interpretation:

Mechanism pathway should be predicted and mechanism should be drawn for the given elimination reaction.

Concept introduction:

• Mechanism: mechanism describes the reaction path and process. In reaction mechanism, curved arrows are used to show the electron transfer from one group to another.
• Curved arrow direction should be from lone pair electrons to electron deficient species such as carbocation etc.
• Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base.
• 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.
• Dehydration and dehydro halogenation process takes place in presence of acid then gentle heat applied to the substrate.

(d)

Interpretation Introduction

Interpretation:

Mechanism pathway should be predicted and mechanism should be drawn for the given elimination reaction.

Concept introduction:

• Mechanism: mechanism describes the reaction path and process. In reaction mechanism, curved arrows are used to show the electron transfer from one group to another.
• Curved arrow direction should be from lone pair electrons to electron deficient species such as carbocation etc.
• Elimination reaction: In elimination reaction, two substituents are removed from the substrate to give the product in presence of base.
• 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.
• Dehydration and dehydro halogenation process takes place in presence of acid then gentle heat applied to the substrate.