It is to be shown how pent-2-yne can be made from two different alkyl bromides. Concept introduction: Alkynide anions ( RC ≡ C − ) can behave as strong nucleophiles. They are formed when terminal alkynes are treated with a strong base such as sodium hydride. In an acid-base reaction, the weakly held hydrogen atom attached to the terminal carbon atom of the alkyne is abstracted by a strong base. When alkynide anions are treated with alkyl halides , a new carbon-carbon bond is formed. An unsymmetrical internal alkyne can be made using two different alkynide anions and two different alkyl halides.

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Answer 1

Question

Chapter 9, Problem 9.46P

Interpretation Introduction

Interpretation:

It is to be shown how pent-2-yne can be made from two different alkyl bromides.

Concept introduction:

Alkynide anions (RC≡C−) can behave as strong nucleophiles. They are formed when terminal alkynes are treated with a strong base such as sodium hydride. In an acid-base reaction, the weakly held hydrogen atom attached to the terminal carbon atom of the alkyne is abstracted by a strong base. When alkynide anions are treated with alkyl halides, a new carbon-carbon bond is formed. An unsymmetrical internal alkyne can be made using two different alkynide anions and two different alkyl halides.

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Show how each alkene can be synthesized by a Wittig reaction

Show how pent-2-yne can be made from two different alkyl bromides using two necleophilic subsitutions.

Show how the following compound can be synthesized (made) using two different alkenes (two different reactions).

Answer 2

Question

Chapter 9, Problem 9.46P

Interpretation Introduction

Interpretation:

It is to be shown how pent-2-yne can be made from two different alkyl bromides.

Concept introduction:

Alkynide anions (RC≡C−) can behave as strong nucleophiles. They are formed when terminal alkynes are treated with a strong base such as sodium hydride. In an acid-base reaction, the weakly held hydrogen atom attached to the terminal carbon atom of the alkyne is abstracted by a strong base. When alkynide anions are treated with alkyl halides, a new carbon-carbon bond is formed. An unsymmetrical internal alkyne can be made using two different alkynide anions and two different alkyl halides.

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Answer 3

Question

Chapter 9, Problem 9.46P

Interpretation Introduction

Interpretation:

It is to be shown how pent-2-yne can be made from two different alkyl bromides.

Concept introduction:

Alkynide anions (RC≡C−) can behave as strong nucleophiles. They are formed when terminal alkynes are treated with a strong base such as sodium hydride. In an acid-base reaction, the weakly held hydrogen atom attached to the terminal carbon atom of the alkyne is abstracted by a strong base. When alkynide anions are treated with alkyl halides, a new carbon-carbon bond is formed. An unsymmetrical internal alkyne can be made using two different alkynide anions and two different alkyl halides.

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Answer 4

Question

Chapter 9, Problem 9.46P

Interpretation Introduction

Interpretation:

It is to be shown how pent-2-yne can be made from two different alkyl bromides.

Concept introduction:

Alkynide anions (RC≡C−) can behave as strong nucleophiles. They are formed when terminal alkynes are treated with a strong base such as sodium hydride. In an acid-base reaction, the weakly held hydrogen atom attached to the terminal carbon atom of the alkyne is abstracted by a strong base. When alkynide anions are treated with alkyl halides, a new carbon-carbon bond is formed. An unsymmetrical internal alkyne can be made using two different alkynide anions and two different alkyl halides.

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Answer 5

Chapter 9, Problem 9.46P

Interpretation Introduction

Interpretation:

It is to be shown how pent-2-yne can be made from two different alkyl bromides.

Concept introduction:

Alkynide anions (RC≡C−) can behave as strong nucleophiles. They are formed when terminal alkynes are treated with a strong base such as sodium hydride. In an acid-base reaction, the weakly held hydrogen atom attached to the terminal carbon atom of the alkyne is abstracted by a strong base. When alkynide anions are treated with alkyl halides, a new carbon-carbon bond is formed. An unsymmetrical internal alkyne can be made using two different alkynide anions and two different alkyl halides.

Answer 6

Chapter 9, Problem 9.46P

Interpretation Introduction

Interpretation:

It is to be shown how pent-2-yne can be made from two different alkyl bromides.

Concept introduction:

Alkynide anions (RC≡C−) can behave as strong nucleophiles. They are formed when terminal alkynes are treated with a strong base such as sodium hydride. In an acid-base reaction, the weakly held hydrogen atom attached to the terminal carbon atom of the alkyne is abstracted by a strong base. When alkynide anions are treated with alkyl halides, a new carbon-carbon bond is formed. An unsymmetrical internal alkyne can be made using two different alkynide anions and two different alkyl halides.

Answer 7

Chapter 9, Problem 9.46P

Interpretation Introduction

Interpretation:

It is to be shown how pent-2-yne can be made from two different alkyl bromides.

Concept introduction:

Alkynide anions (RC≡C−) can behave as strong nucleophiles. They are formed when terminal alkynes are treated with a strong base such as sodium hydride. In an acid-base reaction, the weakly held hydrogen atom attached to the terminal carbon atom of the alkyne is abstracted by a strong base. When alkynide anions are treated with alkyl halides, a new carbon-carbon bond is formed. An unsymmetrical internal alkyne can be made using two different alkynide anions and two different alkyl halides.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 9 - Prob. 9.1P Ch. 9 - Prob. 9.2P Ch. 9 - Prob. 9.3P Ch. 9 - Prob. 9.4P Ch. 9 - Prob. 9.5P Ch. 9 - Prob. 9.6P Ch. 9 - Prob. 9.7P Ch. 9 - Prob. 9.8P Ch. 9 - Prob. 9.9P Ch. 9 - Prob. 9.10P

Solution Summary: The author explains how pent-2-yne can be synthesized from two different alkyl bromides.

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Chapter 9 Solutions