The mechanism for the given reaction has to be identified. Concept introduction: The lone pair on sulfur attacks on the triple bond to form cumulated double bond intermediate. The base abstracts proton from alpha carbon to form enolate ion, which further attacks on carbonyl carbon to form a cyclic ring.

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Chapter 18, Problem 84P

Interpretation Introduction

Interpretation: The mechanism for the given reaction has to be identified.

Concept introduction: The lone pair on sulfur attacks on the triple bond to form cumulated double bond intermediate. The base abstracts proton from alpha carbon to form enolate ion, which further attacks on carbonyl carbon to form a cyclic ring.

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Where are the chiral centers in this molecule? Also is this compound meso yes or no?

Answer 2

Question

Chapter 18, Problem 84P

Interpretation Introduction

Interpretation: The mechanism for the given reaction has to be identified.

Concept introduction: The lone pair on sulfur attacks on the triple bond to form cumulated double bond intermediate. The base abstracts proton from alpha carbon to form enolate ion, which further attacks on carbonyl carbon to form a cyclic ring.

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Answer 3

Question

Chapter 18, Problem 84P

Interpretation Introduction

Interpretation: The mechanism for the given reaction has to be identified.

Concept introduction: The lone pair on sulfur attacks on the triple bond to form cumulated double bond intermediate. The base abstracts proton from alpha carbon to form enolate ion, which further attacks on carbonyl carbon to form a cyclic ring.

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Answer 4

Question

Chapter 18, Problem 84P

Interpretation Introduction

Interpretation: The mechanism for the given reaction has to be identified.

Concept introduction: The lone pair on sulfur attacks on the triple bond to form cumulated double bond intermediate. The base abstracts proton from alpha carbon to form enolate ion, which further attacks on carbonyl carbon to form a cyclic ring.

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Answer 5

Chapter 18, Problem 84P

Interpretation Introduction

Interpretation: The mechanism for the given reaction has to be identified.

Concept introduction: The lone pair on sulfur attacks on the triple bond to form cumulated double bond intermediate. The base abstracts proton from alpha carbon to form enolate ion, which further attacks on carbonyl carbon to form a cyclic ring.

Answer 6

Chapter 18, Problem 84P

Interpretation Introduction

Interpretation: The mechanism for the given reaction has to be identified.

Concept introduction: The lone pair on sulfur attacks on the triple bond to form cumulated double bond intermediate. The base abstracts proton from alpha carbon to form enolate ion, which further attacks on carbonyl carbon to form a cyclic ring.

Answer 7

Chapter 18, Problem 84P

Interpretation Introduction

Interpretation: The mechanism for the given reaction has to be identified.

Concept introduction: The lone pair on sulfur attacks on the triple bond to form cumulated double bond intermediate. The base abstracts proton from alpha carbon to form enolate ion, which further attacks on carbonyl carbon to form a cyclic ring.

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Answer 11

Ch. 18.1 - Prob. 1P Ch. 18.1 - Prob. 2P Ch. 18.1 - Prob. 3P Ch. 18.1 - Prob. 4P Ch. 18.1 - PROBLEM 5♦ List the compounds in each of the...Ch. 18.2 - Explain why 92% of 2,4-pemtanedione exists as the...Ch. 18.3 - Draw the enol tautomers for each of the following...Ch. 18.3 - Prob. 8P Ch. 18.4 - Prob. 9P Ch. 18.4 - Prob. 10P

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Chapter 18 Solutions