Chapter 9.3, Problem 4ATS

(a)

Interpretation Introduction

Interpretation:

Intermediate carbocation should be drawn for the given substrate while reacting with $\text{HBr}$.

Concept introduction:

• Hydro halogenation reaction: In hydro halogenation reaction hydrogen halide added across the unsaturated bond (alkene). In this addition reaction chloride ion added to the most substituted carbon position of the alkene, which follows the Markovnikov’s rule.
• Markovnikov’s rule: In addition reactions negatively addendum goes to most substituted carbon position in alkene.

To draw: Intermediate for the given substrate in hydro halogenation reaction.

(b)

Interpretation Introduction

Interpretation:

Intermediate carbocation should be drawn for the given substrate while reacting with $\text{HBr}$.

Concept introduction:

• Hydro halogenation reaction: In hydro halogenation reaction hydrogen halide added across the unsaturated bond (alkene). In this addition reaction chloride ion added to the most substituted carbon position of the alkene, which follows the Markovnikov’s rule.
• Markovnikov’s rule: In addition reactions negatively addendum goes to most substituted carbon position in alkene.

To draw: Intermediate for the given substrate in hydro halogenation reaction.

(c)

Interpretation Introduction

Interpretation:

Intermediate carbocation should be drawn for the given substrate while reacting with $\text{HBr}$.

Concept introduction:

• Hydro halogenation reaction: In hydro halogenation reaction hydrogen halide added across the unsaturated bond (alkene). In this addition reaction chloride ion added to the most substituted carbon position of the alkene, which follows the Markovnikov’s rule.
• Markovnikov’s rule: In addition reactions negatively addendum goes to most substituted carbon position in alkene.

To draw: Intermediate for the given substrate in hydro halogenation reaction.

(d)

Interpretation Introduction

Interpretation:

Intermediate carbocation should be drawn for the given substrate while reacting with $\text{HBr}$.

Concept introduction:

• Hydro halogenation reaction: In hydro halogenation reaction hydrogen halide added across the unsaturated bond (alkene). In this addition reaction chloride ion added to the most substituted carbon position of the alkene, which follows the Markovnikov’s rule.
• Markovnikov’s rule: In addition reactions negatively addendum goes to most substituted carbon position in alkene.

To draw: Intermediate for the given substrate in hydro halogenation reaction.