The most important thing to consider when applying group theory is finding the molecule’s point group or its particular symmetry operations. In order to identify a molecule’s symmetry operations, one must first find the molecule’s symmetry elements. In other words, the first stage in utilizing group theory with molecular properties is identifying a molecule’s symmetry elements. For most beginners without experience this has proven to be most difficult because it requires the individual to visually identify the elements of symmetry in a 3D object. However, once this is overcome, applying group theory to forefront point groups and symmetry operations becomes second nature.
Part of the book: Symmetry (Group Theory) and Mathematical Treatment in Chemistry