:0: (а) I or II :ö:0 (b) CH3 II CH3 or (с) CH2 CH2 II or

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
icon
Related questions
Question

Which resonance structure in each of the following pairs is more stable? Why?

The image presents a series of resonance structures for different anionic and cationic species. Each subsection (a, b, and c) illustrates two resonance forms (I and II), which are depicted with arrows showing their reversible nature. Here is a detailed explanation for each section:

### (a) Resonance Structures

- **Structure I**: Depicts a molecule with a negatively charged oxygen atom (indicated by a "−" sign) attached to a two-carbon chain. The charge on the oxygen shows it has three lone pairs of electrons.
  
- **Structure II**: The negative charge is on the oxygen, which is part of a carbon-oxygen double bond. This structure also includes a two-carbon chain joined to the carbon atom of the carbonyl group.

Both structures are interconvertible, as shown by the double-headed resonance arrow.

### (b) Resonance Structures

- **Structure I**: Features a molecule with a positively charged carbon (cationic center) next to a negatively charged oxygen. The carbon is bonded to a methyl group (CH₃) and forms part of a three-carbon chain.

- **Structure II**: Displays the same arrangement where the positive charge is again on a carbon atom linked to the methyl group. The oxygen carries a negative charge and is double-bonded to a carbon atom.

These structures are in resonance equilibrium, as indicated by the double-headed arrow.

### (c) Resonance Structures

- **Structure I**: Shows a molecule with a negative charge on oxygen, represented by three lone pairs around the oxygen atom. There is a double bond with an aliphatic chain that ends with a CH₂⁺ group.
  
- **Structure II**: Illustrates a very similar arrangement but with the carbon-oxygen double bond within the molecule, maintaining the positive charge on a carbon-atom (CH₂⁺) at one end. 

Similar to the previous examples, these two structures are indicated as resonance forms with a double-headed arrow.

Each set of structures highlights the delocalization of electrons in their respective systems. The charges and lone pairs fluctuate between different atoms, leading to more stable resonance hybrids overall.
Transcribed Image Text:The image presents a series of resonance structures for different anionic and cationic species. Each subsection (a, b, and c) illustrates two resonance forms (I and II), which are depicted with arrows showing their reversible nature. Here is a detailed explanation for each section: ### (a) Resonance Structures - **Structure I**: Depicts a molecule with a negatively charged oxygen atom (indicated by a "−" sign) attached to a two-carbon chain. The charge on the oxygen shows it has three lone pairs of electrons. - **Structure II**: The negative charge is on the oxygen, which is part of a carbon-oxygen double bond. This structure also includes a two-carbon chain joined to the carbon atom of the carbonyl group. Both structures are interconvertible, as shown by the double-headed resonance arrow. ### (b) Resonance Structures - **Structure I**: Features a molecule with a positively charged carbon (cationic center) next to a negatively charged oxygen. The carbon is bonded to a methyl group (CH₃) and forms part of a three-carbon chain. - **Structure II**: Displays the same arrangement where the positive charge is again on a carbon atom linked to the methyl group. The oxygen carries a negative charge and is double-bonded to a carbon atom. These structures are in resonance equilibrium, as indicated by the double-headed arrow. ### (c) Resonance Structures - **Structure I**: Shows a molecule with a negative charge on oxygen, represented by three lone pairs around the oxygen atom. There is a double bond with an aliphatic chain that ends with a CH₂⁺ group. - **Structure II**: Illustrates a very similar arrangement but with the carbon-oxygen double bond within the molecule, maintaining the positive charge on a carbon-atom (CH₂⁺) at one end. Similar to the previous examples, these two structures are indicated as resonance forms with a double-headed arrow. Each set of structures highlights the delocalization of electrons in their respective systems. The charges and lone pairs fluctuate between different atoms, leading to more stable resonance hybrids overall.
Expert Solution
Step 1

Resonance structure are the structure of a molecule which are obtained by conjugation of π electrons .

 

steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY