![]() 1To determine the symmetry point group of a molecule is very important, because all symmetry related properties are dependent on the symmetry point group of the molecule. According to the symmetry of molecules, they can be classified as symmetry point groups. Second reason is that all the symmetry operations are related to a fixed point in the molecule, which is not necessarily to be an atom of the molecule. ![]() First reason is that this group have all the properties of a group. It is called point group for two reasons. This group is called symmetry point group. As what mentioned above, all the symmetry operations of a molecule as a group can be written in the form of group multiplication table and they obey all the properties of a group.
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