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 Molecular vibrations and rotations Book chapter IOPscience 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 High Resolution Ro Vibrational and Rotational Spectroscopy of the Open Shell, Linear CCH+ Ion (3) The Journal of Physical Chemistry A Level nj is given by points the relative population of a Representative one bond spin spin coupling constants measured in the Download Table