Returns a list of vibration in energy units eV.

        Returns
        -------
        vibs : list of vibrations in eV

def get_vib_energies(self):
        """Returns a list of vibration in energy units eV.

        Returns
        -------
        vibs : list of vibrations in eV
        """
        vibs = self.molecule_dict[self.name]['vibrations']
        vibs = np.array(vibs) * cm2ev
        return (vibs)