Top topic this week
Questions asked by users might not always be phrased in the clearest way.
The formula used to find symmetry vibrations is based on group theory and the concept of normal modes. The number of normal modes (and thus vibrations) for a molecule is equal to its degrees of freedom (3N-6 for nonlinear molecules, 3N-5 for linear molecules, where N is the number of atoms). Determining the symmetry of these vibrations requires analyzing the molecule's point group and using character tables. However, the exact formula varies based on the specific molecule and its symmetry.