Chapter 9.6, Problem 19PTS

(a)

Interpretation Introduction

Interpretation:

Products should be predicted for the given hydroboration reactions of alkenes.

Concept introduction:

• Hydroboration reaction: In this reaction water molecule is added across the double bond of the alkene in syn pathway. In hydroboration reaction, anti-Markovnikov’s product is favorable which means –OH group attached to less substituted carbon end of the alkene.
• Hydroboration reaction takes place in two steps; first step is syn addition of ${\text{BH}}_{\text{3}}$ and second step is attack of nucleophile (hydroxide ion produced from hydrogen peroxide and ${\text{BH}}_{\text{3}}$)

To predict: the product for the given alkene in hydroboration reaction.

(b)

Interpretation Introduction

Interpretation:

Products should be predicted for the given hydroboration reactions of alkenes.

Concept introduction:

• Hydroboration reaction: In this reaction water molecule is added across the double bond of the alkene in syn pathway. In hydroboration reaction, anti-Markovnikov’s product is favorable which means –OH group attached to less substituted carbon end of the alkene.
• Hydroboration reaction takes place in two steps; first step is syn addition of ${\text{BH}}_{\text{3}}$ and second step is attack of nucleophile (hydroxide ion produced from hydrogen peroxide and ${\text{BH}}_{\text{3}}$)

To predict: the product for the given alkene in hydroboration reaction.

(c)

Interpretation Introduction

Interpretation:

Products should be predicted for the given hydroboration reactions of alkenes.

Concept introduction:

• Hydroboration reaction: In this reaction water molecule is added across the double bond of the alkene in syn pathway. In hydroboration reaction, anti-Markovnikov’s product is favorable which means –OH group attached to less substituted carbon end of the alkene.
• Hydroboration reaction takes place in two steps; first step is syn addition of ${\text{BH}}_{\text{3}}$ and second step is attack of nucleophile (hydroxide ion produced from hydrogen peroxide and ${\text{BH}}_{\text{3}}$)

To predict: the product for the given alkene in hydroboration reaction.

(d)

Interpretation Introduction

Interpretation:

Products should be predicted for the given hydroboration reactions of alkenes.

Concept introduction:

• Hydroboration reaction: In this reaction water molecule is added across the double bond of the alkene in syn pathway. In hydroboration reaction, anti-Markovnikov’s product is favorable which means –OH group attached to less substituted carbon end of the alkene.
• Hydroboration reaction takes place in two steps; first step is syn addition of ${\text{BH}}_{\text{3}}$ and second step is attack of nucleophile (hydroxide ion produced from hydrogen peroxide and ${\text{BH}}_{\text{3}}$)

To predict: the product for the given alkene in hydroboration reaction.

(e)

Interpretation Introduction

Interpretation:

Products should be predicted for the given hydroboration reactions of alkenes.

Concept introduction:

• Hydroboration reaction: In this reaction water molecule is added across the double bond of the alkene in syn pathway. In hydroboration reaction, anti-Markovnikov’s product is favorable which means –OH group attached to less substituted carbon end of the alkene.
• Hydroboration reaction takes place in two steps; first step is syn addition of ${\text{BH}}_{\text{3}}$ and second step is attack of nucleophile (hydroxide ion produced from hydrogen peroxide and ${\text{BH}}_{\text{3}}$)

To predict: the product for the given alkene in hydroboration reaction.

(f)

Interpretation Introduction

Interpretation:

Products should be predicted for the given hydroboration reactions of alkenes.

Concept introduction:

• Hydroboration reaction: In this reaction water molecule is added across the double bond of the alkene in syn pathway. In hydroboration reaction, anti-Markovnikov’s product is favorable which means –OH group attached to less substituted carbon end of the alkene.
• Hydroboration reaction takes place in two steps; first step is syn addition of ${\text{BH}}_{\text{3}}$ and second step is attack of nucleophile (hydroxide ion produced from hydrogen peroxide and ${\text{BH}}_{\text{3}}$)

To predict: the product for the given alkene in hydroboration reaction.