Given that terminal alkynes react with bromine and water to yield bromoketones. A mechanism for the reaction is to be proposed. To what reaction of alkenes this reaction is analogous is also to be stated. Concept introduction: Addition of bromine to alkynes occurs through the formation of a cyclic bromonium ion intermediate. Water being nucleophilic, if present will attack the bromonium ion to yield an enol. The enol will then tautomerize to a ketone . Thus in thr product a bromine and a hydroxyl group are added to the triple bond. This reaction is similar to the addition of halohydrins to alkenes. To propose: A mechanism for the reaction in which ethynylbenzene reacts with bromine and water to yield a bromoketone is to be proposed. Further to state to what reaction of alkenes this reaction resembles.

Question

Rank the labeled protons (Ha-Hd) in order of increasing acidity, starting with the least acidic. НОН НЬ OHd Онс

Answer 1

Question

Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone

Chapter 9.SE, Problem 29AP

Interpretation Introduction

Interpretation:

Given that terminal alkynes react with bromine and water to yield bromoketones. A mechanism for the reaction is to be proposed. To what reaction of alkenes this reaction is analogous is also to be stated.

Concept introduction:

Addition of bromine to alkynes occurs through the formation of a cyclic bromonium ion intermediate. Water being nucleophilic, if present will attack the bromonium ion to yield an enol. The enol will then tautomerize to a ketone. Thus in thr product a bromine and a hydroxyl group are added to the triple bond. This reaction is similar to the addition of halohydrins to alkenes.

To propose:

A mechanism for the reaction in which ethynylbenzene reacts with bromine and water to yield a bromoketone is to be proposed. Further to state to what reaction of alkenes this reaction resembles.

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Rank the labeled protons (Ha-Hd) in order of increasing acidity, starting with the least acidic. НОН НЬ OHd Онс

Can the target compound at right be efficiently synthesized in good yield from the unsubstituted benzene at left? ? starting material target If so, draw a synthesis below. If no synthesis using reagents ALEKS recognizes is possible, check the box under the drawing area. Be sure you follow the standard ALEKS rules for submitting syntheses. + More... Note for advanced students: you may assume that you are using a large excess of benzene as your starting material. C :0 T Add/Remove step G

The following equations represent the formation of compound MX. What is the AH for the electron affinity of X (g)? X₂ (g) → 2X (g) M (s) → M (g) M (g) M (g) + e- AH = 60 kJ/mol AH = 22 kJ/mol X (g) + e-X (g) M* (g) +X (g) → MX (s) AH = 118 kJ/mol AH = ? AH = -190 kJ/mol AH = -100 kJ/mol a) -80 kJ b) -30 kJ c) -20 kJ d) 20 kJ e) 156 kJ

Answer 2

Question

Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone

Chapter 9.SE, Problem 29AP

Interpretation Introduction

Interpretation:

Given that terminal alkynes react with bromine and water to yield bromoketones. A mechanism for the reaction is to be proposed. To what reaction of alkenes this reaction is analogous is also to be stated.

Concept introduction:

Addition of bromine to alkynes occurs through the formation of a cyclic bromonium ion intermediate. Water being nucleophilic, if present will attack the bromonium ion to yield an enol. The enol will then tautomerize to a ketone. Thus in thr product a bromine and a hydroxyl group are added to the triple bond. This reaction is similar to the addition of halohydrins to alkenes.

To propose:

A mechanism for the reaction in which ethynylbenzene reacts with bromine and water to yield a bromoketone is to be proposed. Further to state to what reaction of alkenes this reaction resembles.

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Answer 3

Question

Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone

Chapter 9.SE, Problem 29AP

Interpretation Introduction

Interpretation:

Given that terminal alkynes react with bromine and water to yield bromoketones. A mechanism for the reaction is to be proposed. To what reaction of alkenes this reaction is analogous is also to be stated.

Concept introduction:

Addition of bromine to alkynes occurs through the formation of a cyclic bromonium ion intermediate. Water being nucleophilic, if present will attack the bromonium ion to yield an enol. The enol will then tautomerize to a ketone. Thus in thr product a bromine and a hydroxyl group are added to the triple bond. This reaction is similar to the addition of halohydrins to alkenes.

To propose:

A mechanism for the reaction in which ethynylbenzene reacts with bromine and water to yield a bromoketone is to be proposed. Further to state to what reaction of alkenes this reaction resembles.

Expert Solution & Answer

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See solution

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Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C = O, as their functional group. The carbonyl group in ketones is placed somewhere in the middle of the molecular structure, which means, the C=O is attached to two alkyl groups or benzene rings. Just like all other homologous series, the naming of ketones is done using a common suffix “-one”. The general molecular formula is C n H 2n O. Functional group of a ketone

Chapter 9.SE, Problem 29AP

Interpretation Introduction