5.4.1: Rotational Transitions Accompany Vibrational Transitions Chemistry LibreTexts Level nj is given by points the relative population of a Infrared Spectrometric Rotational and Vibrational Analysis of HCl and DCl Caroline Frank Accurate Vibrational and Ro Vibrational Contributions to the Properties of Large Molecules by a New Engine Employing Curvilinear Internal Coordinates and Vibrational Perturbation Theory to Second Order Journal of Chemical Theory and Theoretical and quantum mechanical deconstruction of vibrational energy transfer pathways modified by collective vibrational strong coupling Nature Communications