It is to be explained why the equilibrium percentage of the first given molecule in its keto form is lower than that of the second given molecule, referring to Table 7-1. Concept introduction: In aqueous basic or acidic conditions, ketones and aldehydes exist in rapid equilibrium with a rearranged form called enol form. 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, which is a characteristic of alkenes , and is bonded to OH , which is a characteristic of alcohol. These two forms are always in equilibrium with each other, and this is called keto-enol tautomerization. For cyclic aldehydes and ketones, the percentage of keto form increases as the ring size increases. This is because the angle strain increases in small cyclic rings. The bond angle for a sp 2 hybridized carbon atom is larger than it is for a sp 3 hybridized carbon atom.

Question

Rank each of the following substituted benzene molecules in order of which will react fastest (1) to slowest (4) by electrophilic aromatic substitution. Explanation Check CF3 (Choose one) OH (Choose one) H (Choose one) (Choose one) © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy

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 7.42P

Interpretation Introduction

Interpretation:

It is to be explained why the equilibrium percentage of the first given molecule in its keto form is lower than that of the second given molecule, referring to Table 7-1.

Concept introduction:

In aqueous basic or acidic conditions, ketones and aldehydes exist in rapid equilibrium with a rearranged form called enol form. 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, which is a characteristic of alkenes, and is bonded to OH, which is a characteristic of alcohol. These two forms are always in equilibrium with each other, and this is called keto-enol tautomerization. For cyclic aldehydes and ketones, the percentage of keto form increases as the ring size increases. This is because the angle strain increases in small cyclic rings. The bond angle for a sp2 hybridized carbon atom is larger than it is for a sp3 hybridized carbon atom.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

Rank each of the following substituted benzene molecules in order of which will react fastest (1) to slowest (4) by electrophilic aromatic substitution. Explanation Check CF3 (Choose one) OH (Choose one) H (Choose one) (Choose one) © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy

Identifying electron-donating and electron-withdrawing effects For each of the substituted benzene molecules below, determine the inductive and resonance effects the substituent will have on the benzene ring, as well as the overall electron-density of the ring compared to unsubstituted benzene. Molecule Inductive Effects Resonance Effects Overall Electron-Density CF3 O donating O donating O electron-rich O withdrawing withdrawing O no inductive effects O no resonance effects O electron-deficient O similar to benzene OCH3 Explanation Check O donating O donating ○ withdrawing withdrawing O no inductive effects no resonance effects electron-rich electron-deficient O similar to benzene Х © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center

The acid-base chemistry of both EDTA and EBT are important to ensuring that the reactions proceed as desired, thus the pH is controlled using a buffer. What percent of the EBT indicator will be in the desired HIn2- state at pH = 10.5. pKa1 = 6.2 and pKa2 = 11.6 of EBT

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 7.42P

Interpretation Introduction

Interpretation:

It is to be explained why the equilibrium percentage of the first given molecule in its keto form is lower than that of the second given molecule, referring to Table 7-1.

Concept introduction:

In aqueous basic or acidic conditions, ketones and aldehydes exist in rapid equilibrium with a rearranged form called enol form. 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, which is a characteristic of alkenes, and is bonded to OH, which is a characteristic of alcohol. These two forms are always in equilibrium with each other, and this is called keto-enol tautomerization. For cyclic aldehydes and ketones, the percentage of keto form increases as the ring size increases. This is because the angle strain increases in small cyclic rings. The bond angle for a sp2 hybridized carbon atom is larger than it is for a sp3 hybridized carbon atom.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook 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 7.42P

Interpretation Introduction

Interpretation:

It is to be explained why the equilibrium percentage of the first given molecule in its keto form is lower than that of the second given molecule, referring to Table 7-1.

Concept introduction:

In aqueous basic or acidic conditions, ketones and aldehydes exist in rapid equilibrium with a rearranged form called enol form. 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, which is a characteristic of alkenes, and is bonded to OH, which is a characteristic of alcohol. These two forms are always in equilibrium with each other, and this is called keto-enol tautomerization. For cyclic aldehydes and ketones, the percentage of keto form increases as the ring size increases. This is because the angle strain increases in small cyclic rings. The bond angle for a sp2 hybridized carbon atom is larger than it is for a sp3 hybridized carbon atom.

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 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 7.42P

Interpretation Introduction