Using the molecular model of α-pinene , the reason behind ‘ α-pinene , on catalytic hydrogenation, gives compound A as the only product’ is to be explained. Concept introduction: Alkenes , upon catalytic hydrogenation, gives corresponding alkanes . Catalytic hydrogenation is a stereospecific syn addition. The major product is the one in which the alkene is less hindered and better able to contact the catalyst surface. In catalytic hydrogenation, the stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to the double bond. The stereoisomer in which the bulky substituents occupy maximum equatorial sites is less stable.

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Answer 1

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Chapter 8.2, Problem 3P

Interpretation Introduction

Interpretation:

Using the molecular model of α-pinene, the reason behind ‘α-pinene, on catalytic hydrogenation, gives compound A as the only product’ is to be explained.

Concept introduction:

Alkenes, upon catalytic hydrogenation, gives corresponding alkanes.

Catalytic hydrogenation is a stereospecific syn addition.

The major product is the one in which the alkene is less hindered and better able to contact the catalyst surface.

In catalytic hydrogenation, the stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to the double bond.

The stereoisomer in which the bulky substituents occupy maximum equatorial sites is less stable.

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Answer 2

Question

Chapter 8.2, Problem 3P

Interpretation Introduction

Interpretation:

Using the molecular model of α-pinene, the reason behind ‘α-pinene, on catalytic hydrogenation, gives compound A as the only product’ is to be explained.

Concept introduction:

Alkenes, upon catalytic hydrogenation, gives corresponding alkanes.

Catalytic hydrogenation is a stereospecific syn addition.

The major product is the one in which the alkene is less hindered and better able to contact the catalyst surface.

In catalytic hydrogenation, the stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to the double bond.

The stereoisomer in which the bulky substituents occupy maximum equatorial sites is less stable.

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Answer 3

Question

Chapter 8.2, Problem 3P

Interpretation Introduction

Interpretation:

Using the molecular model of α-pinene, the reason behind ‘α-pinene, on catalytic hydrogenation, gives compound A as the only product’ is to be explained.

Concept introduction:

Alkenes, upon catalytic hydrogenation, gives corresponding alkanes.

Catalytic hydrogenation is a stereospecific syn addition.

The major product is the one in which the alkene is less hindered and better able to contact the catalyst surface.

In catalytic hydrogenation, the stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to the double bond.

The stereoisomer in which the bulky substituents occupy maximum equatorial sites is less stable.

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Answer 4

Question

Chapter 8.2, Problem 3P

Interpretation Introduction

Interpretation:

Using the molecular model of α-pinene, the reason behind ‘α-pinene, on catalytic hydrogenation, gives compound A as the only product’ is to be explained.

Concept introduction:

Alkenes, upon catalytic hydrogenation, gives corresponding alkanes.

Catalytic hydrogenation is a stereospecific syn addition.

The major product is the one in which the alkene is less hindered and better able to contact the catalyst surface.

In catalytic hydrogenation, the stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to the double bond.

The stereoisomer in which the bulky substituents occupy maximum equatorial sites is less stable.

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Answer 5

Chapter 8.2, Problem 3P

Interpretation Introduction

Interpretation:

Using the molecular model of α-pinene, the reason behind ‘α-pinene, on catalytic hydrogenation, gives compound A as the only product’ is to be explained.

Concept introduction:

Alkenes, upon catalytic hydrogenation, gives corresponding alkanes.

Catalytic hydrogenation is a stereospecific syn addition.

The major product is the one in which the alkene is less hindered and better able to contact the catalyst surface.

In catalytic hydrogenation, the stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to the double bond.

The stereoisomer in which the bulky substituents occupy maximum equatorial sites is less stable.

Answer 6

Chapter 8.2, Problem 3P

Interpretation Introduction

Interpretation:

Using the molecular model of α-pinene, the reason behind ‘α-pinene, on catalytic hydrogenation, gives compound A as the only product’ is to be explained.

Concept introduction:

Alkenes, upon catalytic hydrogenation, gives corresponding alkanes.

Catalytic hydrogenation is a stereospecific syn addition.

The major product is the one in which the alkene is less hindered and better able to contact the catalyst surface.

In catalytic hydrogenation, the stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to the double bond.

The stereoisomer in which the bulky substituents occupy maximum equatorial sites is less stable.

Answer 7

Chapter 8.2, Problem 3P

Interpretation Introduction

Interpretation:

Using the molecular model of α-pinene, the reason behind ‘α-pinene, on catalytic hydrogenation, gives compound A as the only product’ is to be explained.

Concept introduction:

Alkenes, upon catalytic hydrogenation, gives corresponding alkanes.

Catalytic hydrogenation is a stereospecific syn addition.

The major product is the one in which the alkene is less hindered and better able to contact the catalyst surface.

In catalytic hydrogenation, the stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to the double bond.

The stereoisomer in which the bulky substituents occupy maximum equatorial sites is less stable.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 8.1 - What three alkenes yield 2-methylbutane on...Ch. 8.2 - Prob. 2P Ch. 8.2 - Prob. 3P Ch. 8.3 - Prob. 4P Ch. 8.4 - Prob. 5P Ch. 8.4 - Give a structural formula for the carbocation...Ch. 8.5 - Prob. 7P Ch. 8.6 - Instead of the three-step process of Mechanism...Ch. 8.6 - The rates of hydration of the two alkenes shown...Ch. 8.6 - Is the electrophilic addition of hydrogen chloride...

Solution Summary: The author explains that the catalytic hydrogenation of -pinene yields only compound A. The stereo selectivity depends on the direction from which hydrogen atoms are transferred from the catalyst to

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