Why HCI, CO and NO are IR active, While H2, O2, Cl2 are IR inactive.SpectroscopyPhysical Chemistry

More Questions...
Why diatomic molecules should be considered as anharmonic oscillator.
5387 Views
Why Vibrations in molecule are anharmonic.
4269 Views
Discuss the vibrational spectra of simple diatomic molecules vibrating anharmonically.
13011 Views
Rotational Vibrational Spectra of Diatomic molecules.
5299 Views
What is P and R Branch in Rotational - Vibrational Spectra.
4641 Views

Why HCI, CO and NO are IR active, While H₂, O₂, Cl₂ are IR inactive.
5442 Views

5442 Views

TLC

When two atoms of a diatomic molecule are having different electronegativity they generate a dipole moment. Molecules with dipole moments absorb the radiation from Infra-red region and set the vibrational motion due to fluctuation in the bond. This increases the vibrational energy. Such molecules are IR active. Simple diatomic linear polar molecules have only one mode of vibration i.e. the stretching and contraction of bond. Therefore, hetero nuclear polar molecules like HCI, CO and NO are IR active.

While homo-nuclear non-polar molecules with symmetrical structure like H₂, O₂, Cl₂ does not posses dipole moment and are IR inactive.

Discuss Different types of Vibrations in Polyatomic molecules.
4665 Views
Discuss the Vibrational Spectra of H₂O molecule.
6018 Views
Discuss the Vibrational Spectra of CO₂ molecule.
3993 Views
Explain the Polarisability of molecule?
2833 Views
On the basis of Basic Quantum Theory, explain the mechanism of Raman Spectra
3440 Views
More Questions...

MCQ on Spectroscopy from Physical Chemistry

Write your Comment

Prof. Gianfranco Coletti

Shared publicly - 2019-08-23 00:00:00

Don’t want your columns to simply stack in some grid tiers? Use a combination of different classes for each tier as needed. See the example below for a better idea of how it all works.

Prof. Maheshwar Sharon

Shared publicly - 2019-08-24 00:00:00

For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes. Specify a numbered class when you need a particularly sized column; otherwise, feel free to stick to

sunil

Shared publicly - 2023-02-28 11:09:52

this is

ss

Shared publicly - 2023-02-28 10:48:10

gsgsg

Latest News

Become an Instructor 4 March, 2018
Apply to join the passionate instructors who share their expertise and knowledge with the world. You'll collaborate with some of the industry's best producers, directors, and editors so that your content is presented in the best possible light..