Which of the following statements about the IR activity is true? A linear diatomic molecule composed of two identical atoms has a reduced mass of zero resulting in an infinitely high natural frequency of vibration.A linear diatomic molecule composed of different atoms will not have any IR active stretching mode.Degenerate IR active modes have the same natural frequencies of vibrationA non-linear molecule composed of 17 atoms will have 45 active IR vibrational modes.IR vibrational modes typically correspond to a change in a dipole moment that is perpendicular to one of the molecules mirror planes.

the true statement about IR is :- A linear diatomic molecule composed of different atoms will not…

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Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter15: Introduction To Electronic Spectroscopy And Structure

Section: Chapter Questions

Problem 15.69E

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Which of the following statements about the IR activity is true?

A linear diatomic molecule composed of two identical atoms has a reduced mass of zero resulting in an infinitely high natural frequency of vibration.
A linear diatomic molecule composed of different atoms will not have any IR active stretching mode.
Degenerate IR active modes have the same natural frequencies of vibration
A non-linear molecule composed of 17 atoms will have 45 active IR vibrational modes.
IR vibrational modes typically correspond to a change in a dipole moment that is perpendicular to one of the molecules mirror planes.

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