Organic Chemistry: A Guided Inquiry
Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN: 9780618974122
Author: Andrei Straumanis
Publisher: Cengage Learning
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Chapter 5, Problem 21CTQ

(a)

Interpretation Introduction

Interpretation: The missing resonance structures for anion shown below should be determined.

  Organic Chemistry: A Guided Inquiry, Chapter 5, Problem 21CTQ , additional homework tip  1

Concept introduction:When one single structure is unable to describe all the properties of single molecule, a phenomenon called resonance comes into play. This arises when two or more than two Lewis structures are possible for one molecule. All such structures are called resonating structures and have same placement of atoms in them but these have different locations of bond pairs and lone pairs. The resonating structures are inter-convertible with each other. The resultant of all the resonating or contributing structures is called the resonance hybrid.

Rules to form resonance structure are as follows:

1. Use arrow types 1 and 2 for resonance structure of anions in movement of negative charge.

2. Use only arrow type 3 to move a positive charge for resonance structure of cations.

3. The sigma bond should not be broken. Any atom must not move from its place and total number of electrons must be same in all resonance structures.

(b)

Interpretation Introduction

Interpretation: The missing resonance structures for anion shown below should be determined.

  Organic Chemistry: A Guided Inquiry, Chapter 5, Problem 21CTQ , additional homework tip  2

Concept introduction: When one single structure is unable to describe all the properties of single molecule, a phenomenon called resonance comes into play. This arises when two or more than two Lewis structures are possible for one molecule. All such structures are called resonating structures and have same placement of atoms in them but these have different locations of bond pairs and lone pairs. The resonating structures are inter-convertible with each other. The resultant of all the resonating or contributing structures is called the resonance hybrid.

Rules to form resonance structure are as follows:

1. Use arrow types 1 and 2 for resonance structure of anions in movement of negative charge.

2. Use only arrow type 3 to move a positive charge for resonance structure of cations.

3. The sigma bond should not be broken. Any atom must not move from its place and total number of electrons must be same in all resonance structures.

(c)

Interpretation Introduction

Interpretation: The missing resonance structures for anion shown below should be determined.

  Organic Chemistry: A Guided Inquiry, Chapter 5, Problem 21CTQ , additional homework tip  3

Concept introduction: When one single structure is unable to describe all the properties of single molecule, a phenomenon called resonance comes into play. This arises when two or more than two Lewis structures are possible for one molecule. All such structures are called resonating structures and have same placement of atoms in them but these have different locations of bond pairs and lone pairs. The resonating structures are inter-convertible with each other. The resultant of all the resonating or contributing structures is called the resonance hybrid.

Rules to form resonance structure are as follows:

1. Use arrow types 1 and 2 for resonance structure of anions in movement of negative charge.

2. Use only arrow type 3 to move a positive charge for resonance structure of cations.

3. The sigma bond should not be broken. Any atom must not move from its place and total number of electrons must be same in all resonance structures.

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Students have asked these similar questions
Circle the most basic atom or group of atoms in each of the following molecules:
Each of the following molecules has one additional resonance form. Draw the additional resonance form and then fill out the table for each labelled atom.
Draw three additional resonance structures for the anion shown below.

Chapter 5 Solutions

Organic Chemistry: A Guided Inquiry

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