Answer to Question #82199 in Inorganic Chemistry for Vikas

Question #82199
Which of the following molecules exhibit rotational and or vibrational spectra
H2, HF, CO, NO
1
Expert's answer
2018-10-23T09:46:08-0400

In the IR absorption spectrum of diatomic molecules vibrate. frequencies are observed only in heteronuclear molecules (HF, NO, CO, etc.), and the selection rules are determined by the change in their electric. dipole moment with fluctuations.

Linear rotors: 1 moment of inertia (molecular axis) equal to zero : HF, CO, NO.

Rotationally inactive molecules: non-polar, homonuclear diatomic, symmetrical linear, spherical rotors (unless distorted by rotation) H2.

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