Introduction into the
Symmetry of Molecules

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Step: 122

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According to the type of the available axis of rotation the following organization of the point groups results:
Type of the axis of proper rotation point group
one (linear molecules) D h, v
several C n (n > of 3, cubic molecules) I h, O h, T d
a C n (n > 2) S 2n , D nh , D nd , D n , C nv , C nh , C n
no C n (n > 2) C i , C S , C 1

Compare this table with the regulation algorithm ! By consideration of further symmetry elements (see algorithm!) taken place then the determination of the point groups. Which symmetry elements are that?

Continue now with training step 123 !