The vibrational modes and rotational constants of NH 3 (Herzberg 1991). Download Table ROTATIONAL VIBRATIONAL COUPLING Introduction to vibrational spectroscopies ChemTexts Springer Nature Link 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 Rotational vibrational spectroscopy: Solved] Assuming no interaction between vibrational and rotational e