It is to be explained why most ketones and aldehydes exist primarily in their keto forms but Propanedial exists primarily (>99%) in its enol form. Concept introduction: As a ketone or aldehyde, the species is called the keto form. In the enol form, the species has a carbon atom that is simultaneously a part of a C = C bond, characteristic of an alkene , and is bonded to OH, characteristic of an alcohol. In the keto form, there is a hydrogen atom on the carbon atom that is adjacent to the C = O group, so called alpha carbon, whereas in the enol form, the hydrogen appears on the oxygen atom instead. In a keto-enol tautomerization, the keto form is in equilibrium with its enol form via proton transfer steps. In general, keto form is more stable than enol because the total bond energy for the keto form is roughly greater than that of the enol form.

Question

Want to see the full answer?

Answer 1

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 7, Problem 7.43P

Interpretation Introduction

Interpretation:

It is to be explained why most ketones and aldehydes exist primarily in their keto forms but Propanedial exists primarily (>99%) in its enol form.

Concept introduction:

As a ketone or aldehyde, the species is called the keto form. In the enol form, the species has a carbon atom that is simultaneously a part of a C = C bond, characteristic of an alkene, and is bonded to OH, characteristic of an alcohol. In the keto form, there is a hydrogen atom on the carbon atom that is adjacent to the C = O group, so called alpha carbon, whereas in the enol form, the hydrogen appears on the oxygen atom instead. In a keto-enol tautomerization, the keto form is in equilibrium with its enol form via proton transfer steps. In general, keto form is more stable than enol because the total bond energy for the keto form is roughly greater than that of the enol form.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Which of the given reactions would form meso product? H₂O, H2SO4 III m CH3 CH₂ONa CH3OH || H₂O, H2SO4 CH3 1. LiAlH4, THF 2. H₂O CH3 IV

What is the major product of the following reaction? O IV III HCI D = III ა IV

The reaction of what nucleophile and substrate is represented by the following transition state? CH3 CH3O -Br อ δ CH3 Methanol with 2-bromopropane Methanol with 1-bromopropane Methoxide with 1-bromopropane Methoxide with 2-bromopropane

Answer 2

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 7, Problem 7.43P

Interpretation Introduction

Interpretation:

It is to be explained why most ketones and aldehydes exist primarily in their keto forms but Propanedial exists primarily (>99%) in its enol form.

Concept introduction:

As a ketone or aldehyde, the species is called the keto form. In the enol form, the species has a carbon atom that is simultaneously a part of a C = C bond, characteristic of an alkene, and is bonded to OH, characteristic of an alcohol. In the keto form, there is a hydrogen atom on the carbon atom that is adjacent to the C = O group, so called alpha carbon, whereas in the enol form, the hydrogen appears on the oxygen atom instead. In a keto-enol tautomerization, the keto form is in equilibrium with its enol form via proton transfer steps. In general, keto form is more stable than enol because the total bond energy for the keto form is roughly greater than that of the enol form.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 7, Problem 7.43P

Interpretation Introduction

Interpretation:

It is to be explained why most ketones and aldehydes exist primarily in their keto forms but Propanedial exists primarily (>99%) in its enol form.

Concept introduction:

As a ketone or aldehyde, the species is called the keto form. In the enol form, the species has a carbon atom that is simultaneously a part of a C = C bond, characteristic of an alkene, and is bonded to OH, characteristic of an alcohol. In the keto form, there is a hydrogen atom on the carbon atom that is adjacent to the C = O group, so called alpha carbon, whereas in the enol form, the hydrogen appears on the oxygen atom instead. In a keto-enol tautomerization, the keto form is in equilibrium with its enol form via proton transfer steps. In general, keto form is more stable than enol because the total bond energy for the keto form is roughly greater than that of the enol form.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 7, Problem 7.43P

Interpretation Introduction