Next: O Has Symmetry
Group theory is a very powerful tool in quantum chemistry. By analyzing
the symmetry properties of molecules, we can easily make predictions
such as whether a given electronic transition should be allowed or
forbidden, whether a molecule should have dipole moment, whether a
given vibrational mode should be visible in the infrared or not, etc.
Here we will assume a basic familiarity with point groups and
discuss how group theory can be used to determine the symmetry properties
of molecular vibrations.