(a) Interpretation: The active or inactive state of the molecule CH 3 − CH 3 with C − C stretching vibration in the IR spectrum is to be stated. Concept introduction: A molecule is active in the infrared spectrum if it has the net dipole moment. The vibrations are classified into the two categories. The stretching vibration (In this vibration the interatomic distance is changes continuously along with bond axis). The bending vibration (In the vibration the change in the angle between the two bonds take place). The bending vibrations are further classified into four categories. The wagging vibration. The twisting vibration. The rocking vibration. The scissoring vibration.

BuyFind

Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213
BuyFind

Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213

Solutions

Chapter 16, Problem 16.8QAP
Interpretation Introduction

(a)

Interpretation:

The active or inactive state of the molecule CH3CH3 with CC stretching vibration in the IR spectrum is to be stated.

Concept introduction:

A molecule is active in the infrared spectrum if it has the net dipole moment.

The vibrations are classified into the two categories.

  1. The stretching vibration (In this vibration the interatomic distance is changes continuously along with bond axis).
  2. The bending vibration (In the vibration the change in the angle between the two bonds take place).

The bending vibrations are further classified into four categories.

  1. The wagging vibration.
  2. The twisting vibration.
  3. The rocking vibration.
  4. The scissoring vibration.

Interpretation Introduction

(b)

Interpretation:

The active or inactive state of the molecule CH3CCl3 with CC stretching vibration in the IR spectrum is to be stated.

Concept introduction:

A molecule is active in the infrared spectrum if it has the net dipole moment.

The vibrations are classified into the two categories.

  1. The stretching vibration (In this vibration the interatomic distance is changes continuously along with bond axis).
  2. The bending vibration (In the vibration the change in the angle between the two bonds take place).

The bending vibrations are further classified into four categories.

  1. The wagging vibration.
  2. The twisting vibration.
  3. The rocking vibration.
  4. The scissoring vibration.

Interpretation Introduction

(c)

Interpretation:

The active or inactive state of the molecule SO2 with symmetric stretching vibration in the IR spectrum is to be stated.

Concept introduction:

A molecule is active in the infrared spectrum if it has the net dipole moment.

The vibrations are classified into the two categories.

  1. The stretching vibration (In this vibration the interatomic distance is changes continuously along with bond axis).
  2. The bending vibration (In the vibration the change in the angle between the two bonds take place).

The bending vibrations are further classified into four categories.

  1. The wagging vibration.
  2. The twisting vibration.
  3. The rocking vibration.
  4. The scissoring vibration.

Interpretation Introduction

(d)

Interpretation:

The active or inactive state of the molecule CH2=CH2 with CH stretching vibration in the IR spectrum is to be stated.

Concept introduction:

A molecule is active in the infrared spectrum if it has the net dipole moment.

The vibrations are classified into the two categories.

  1. The stretching vibration (In this vibration the interatomic distance is changes continuously along with bond axis).
  2. The bending vibration (In the vibration the change in the angle between the two bonds take place).

The bending vibrations are further classified into four categories.

  1. The wagging vibration.
  2. The twisting vibration.
  3. The rocking vibration.
  4. The scissoring vibration.

Interpretation Introduction

(e)

Interpretation:

The active or inactive state of the molecule CH2=CH2 with CH stretching vibration in the IR spectrum is to be stated.

Concept introduction:

A molecule is active in the infrared spectrum if it has the net dipole moment.

The vibrations are classified into the two categories.

  1. The stretching vibration (In this vibration the interatomic distance is changes continuously along with bond axis).
  2. The bending vibration (In the vibration the change in the angle between the two bonds take place).

The bending vibrations are further classified into four categories.

  1. The wagging vibration.
  2. The twisting vibration.
  3. The rocking vibration.
  4. The scissoring vibration.

Interpretation Introduction

(f)

Interpretation:

The active or inactive state of the molecule CH2=CH2 with CH2 wagging vibration in the IR spectrum is to be stated.

Concept introduction:

A molecule is active in the infrared spectrum if it has the net dipole moment.

The vibrations are classified into the two categories.

  1. The stretching vibration (In this vibration the interatomic distance is changes continuously along with bond axis).
  2. The bending vibration (In the vibration the change in the angle between the two bonds take place).

The bending vibrations are further classified into four categories.

  1. The wagging vibration.
  2. The twisting vibration.
  3. The rocking vibration.
  4. The scissoring vibration.

Interpretation Introduction

(g)

Interpretation:

The active or inactive state of the molecule CH2=CH2 with CH2 twisting vibration in the IR spectrum is to be stated.

Concept introduction:

A molecule is active in the infrared spectrum if it has the net dipole moment.

The vibrations are classified into the two categories.

  1. The stretching vibration (In this vibration the interatomic distance is changes continuously along with bond axis).
  2. The bending vibration (In the vibration the change in the angle between the two bonds take place).

The bending vibrations are further classified into four categories.

  1. The wagging vibration.
  2. The twisting vibration.
  3. The rocking vibration.
  4. The scissoring vibration.

Want to see the full answer?

Check out a sample textbook solution.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.