The product of each reaction should be drawn and identified why different products are obtained. Concept Introduction: Heck reaction: It describes the coupling reaction between aryl, vinyl or benzyl halide and alkene in presence of P d catalyst. Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide. The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes. If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer. Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition. Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

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Answer 1

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Chapter 23, Problem 42PP

Interpretation Introduction

Interpretation:

The product of each reaction should be drawn and identified why different products are obtained.

Concept Introduction:

Heck reaction: It describes the coupling reaction between aryl, vinyl or benzyl halide and alkene in presence of Pd catalyst.

Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.

The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.

If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

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4. Provide a clear arrow-pushing mechanism for each of the following reactions. Do not skip proton transfers, do not combine steps, and make sure your arrows are clear enough to be interpreted without ambiguity. a. 2. 1. LDA 3. H3O+ HO

b. H3C CH3 H3O+ ✓ H OH

2. Provide reagents/conditions to accomplish the following syntheses. More than one step is required in some cases. a. CH3

Answer 2

Question

Chapter 23, Problem 42PP

Interpretation Introduction

Interpretation:

The product of each reaction should be drawn and identified why different products are obtained.

Concept Introduction:

Heck reaction: It describes the coupling reaction between aryl, vinyl or benzyl halide and alkene in presence of Pd catalyst.

Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.

The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.

If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

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Answer 3

Question

Chapter 23, Problem 42PP

Interpretation Introduction

Interpretation:

The product of each reaction should be drawn and identified why different products are obtained.

Concept Introduction:

Heck reaction: It describes the coupling reaction between aryl, vinyl or benzyl halide and alkene in presence of Pd catalyst.

Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.

The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.

If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

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Answer 4

Question

Chapter 23, Problem 42PP

Interpretation Introduction

Interpretation:

The product of each reaction should be drawn and identified why different products are obtained.

Concept Introduction:

Heck reaction: It describes the coupling reaction between aryl, vinyl or benzyl halide and alkene in presence of Pd catalyst.

Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.

The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.

If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

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Answer 5

Chapter 23, Problem 42PP

Interpretation Introduction

Interpretation:

The product of each reaction should be drawn and identified why different products are obtained.

Concept Introduction:

Heck reaction: It describes the coupling reaction between aryl, vinyl or benzyl halide and alkene in presence of Pd catalyst.

Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.

The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.

If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

Answer 6

Chapter 23, Problem 42PP

Interpretation Introduction

Interpretation:

The product of each reaction should be drawn and identified why different products are obtained.

Concept Introduction:

Heck reaction: It describes the coupling reaction between aryl, vinyl or benzyl halide and alkene in presence of Pd catalyst.

Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.

The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.

If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

Answer 7

Chapter 23, Problem 42PP

Interpretation Introduction

Interpretation:

The product of each reaction should be drawn and identified why different products are obtained.

Concept Introduction:

Heck reaction: It describes the coupling reaction between aryl, vinyl or benzyl halide and alkene in presence of Pd catalyst.

Consider elimination reaction where alkenes are formed when alkyl halides are treated with bases via eliminating one β-proton and one α-halo group of the alkyl halide.

The product of the elimination reaction is depends upon the β-positions of alkyl halide. If the β-positions are identical and the products formed are also identical. If the β-positions are different and the products formed are also different. This means the double bond can form in two different regions so this type of reaction is called regioselective and the products are called as regiochemical outcomes.

If there are two different β-protons at a β-position of alkyl halide, then on the basis of stereoselectivity the trans-isomer is favored over cis-isomer.

Syn addition: When two substituents are added over double or triple bond on same side of the compound simultaneously is called syn addition.

Syn elimination: When two substituents bonded in same side of a compound gets cleaved from the substance simultaneously then the elimination is called syn elimination.

Answer 8

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Answer 10

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Answer 11

Ch. 23.1 - Identify which of the following reagents is...Ch. 23.2 - Prob. 2CC Ch. 23.2 - Prob. 3CC Ch. 23.2 - Prob. 4CC Ch. 23.2 - Prob. 5CC Ch. 23.2 - Prob. 6CC Ch. 23.3 - Show how you would prepare 1-butylcyclopentene...Ch. 23.3 - Prob. 7PTS Ch. 23.3 - Using any two organohalides of your choice...Ch. 23.3 - Prob. 9ATS

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