a) Interpretation: Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not is to be stated. A mechanism to explain the formation of the ketone is to be proposed. Concept introduction: The decarboxylation of a Î²- keto acid takes place through the formation of a planar enol intermediate which then tautomerizes to the keto form. If the Î²- keto acid is optically active and if the chiral centre is involved in the reaction, the ketone product will be racemic and optically inactive. If the chiral centre is not involved in the reaction then the optical activity is retained in the ketone product. To state: Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not. To propose: A mechanism to explain the formation of the ketone.

Question

An unknown weak acid with a concentration of 0.410 M has a pH of 5.600. What is the Ka of the weak acid?

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 22.SE, Problem 23MP

Interpretation Introduction

a)

Interpretation:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not is to be stated. A mechanism to explain the formation of the ketone is to be proposed.

Concept introduction:

The decarboxylation of a Î²- keto acid takes place through the formation of a planar enol intermediate which then tautomerizes to the keto form. If the Î²- keto acid is optically active and if the chiral centre is involved in the reaction, the ketone product will be racemic and optically inactive. If the chiral centre is not involved in the reaction then the optical activity is retained in the ketone product.

To state:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not.

To propose:

A mechanism to explain the formation of the ketone.

Interpretation Introduction

b)

Interpretation:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not is to be stated. A mechanism to explain the formation of the ketone is to be proposed.

Concept introduction:

The decarboxylation of a Î²- keto acid takes place through the formation of a planar enol intermediate which then tautomerizes to the keto form. If the Î²- keto acid is optically active and if the chiral centre is involved in the reaction, the ketone product will be racemic and optically inactive. If the chiral centre is not involved in the reaction then the optical activity is retained in the ketone product.

To state:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not.

To propose:

A mechanism to explain the formation of the ketone.

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An unknown weak acid with a concentration of 0.410 M has a pH of 5.600. What is the Ka of the weak acid?

(racemic) 19.84 Using your reaction roadmaps as a guide, show how to convert 2-oxepanone and ethanol into 1-cyclopentenecarbaldehyde. You must use 2-oxepanone as the source of all carbon atoms in the target molecule. Show all reagents and all molecules synthesized along the way. & + EtOH H 2-Oxepanone 1-Cyclopentenecarbaldehyde

R₂ R₁ R₁ a R Rg Nu R₂ Rg R₁ R R₁₂ R3 R R Nu enolate forming R₁ R B-Alkylated carbonyl species or amines Cyclic B-Ketoester R₁₁ HOB R R₁B R R₁₂ B-Hydroxy carbonyl R diester R2 R3 R₁ RB OR R₂ 0 aB-Unsaturated carbonyl NaOR Aldol HOR reaction 1) LDA 2) R-X 3) H₂O/H₂O ketone, aldehyde 1) 2°-amine 2) acid chloride 3) H₂O'/H₂O 0 O R₁ R₁ R R₁ R₁₂ Alkylated a-carbon R₁ H.C R₁ H.C Alkylated methyl ketone acetoacetic ester B-Ketoester ester R₁ HO R₂ R B-Dicarbonyl HO Alkylated carboxylic acid malonic ester Write the reagents required to bring about each reaction next to the arrows shown. Next, record any regiochemistry or stereochemistry considerations relevant to the reaction. You should also record any key aspects of the mechanism, such as forma- tion of an important intermediate, as a helpful reminder. You may want to keep track of all reactions that make carbon-carbon bonds, because these help you build large molecules from smaller fragments. This especially applies to the reactions in…

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 22.SE, Problem 23MP

Interpretation Introduction

a)

Interpretation:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not is to be stated. A mechanism to explain the formation of the ketone is to be proposed.

Concept introduction:

The decarboxylation of a Î²- keto acid takes place through the formation of a planar enol intermediate which then tautomerizes to the keto form. If the Î²- keto acid is optically active and if the chiral centre is involved in the reaction, the ketone product will be racemic and optically inactive. If the chiral centre is not involved in the reaction then the optical activity is retained in the ketone product.

To state:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not.

To propose:

A mechanism to explain the formation of the ketone.

Interpretation Introduction

b)

Interpretation:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not is to be stated. A mechanism to explain the formation of the ketone is to be proposed.

Concept introduction:

The decarboxylation of a Î²- keto acid takes place through the formation of a planar enol intermediate which then tautomerizes to the keto form. If the Î²- keto acid is optically active and if the chiral centre is involved in the reaction, the ketone product will be racemic and optically inactive. If the chiral centre is not involved in the reaction then the optical activity is retained in the ketone product.

To state:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not.

To propose:

A mechanism to explain the formation of the ketone.

Expert Solution & Answer

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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 22.SE, Problem 23MP

Interpretation Introduction

a)

Interpretation:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not is to be stated. A mechanism to explain the formation of the ketone is to be proposed.

Concept introduction:

The decarboxylation of a Î²- keto acid takes place through the formation of a planar enol intermediate which then tautomerizes to the keto form. If the Î²- keto acid is optically active and if the chiral centre is involved in the reaction, the ketone product will be racemic and optically inactive. If the chiral centre is not involved in the reaction then the optical activity is retained in the ketone product.

To state:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not.

To propose:

A mechanism to explain the formation of the ketone.

Interpretation Introduction

b)

Interpretation:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not is to be stated. A mechanism to explain the formation of the ketone is to be proposed.

Concept introduction:

The decarboxylation of a Î²- keto acid takes place through the formation of a planar enol intermediate which then tautomerizes to the keto form. If the Î²- keto acid is optically active and if the chiral centre is involved in the reaction, the ketone product will be racemic and optically inactive. If the chiral centre is not involved in the reaction then the optical activity is retained in the ketone product.

To state:

Whether the ketone obtained by the decarboxylation of the optically active Î²- keto acid will be optically active or not.

To propose:

A mechanism to explain the formation of the ketone.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

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 22.SE, Problem 23MP

Interpretation Introduction