Type of rotational axis |
other symmetry elements |
point group |
|
S2n |
n senkrecht zu Cn |
sh |
sv,sd |
|
one (linear molecules) |
with |
|
D h |
without |
|
v |
any Cn with n > 3 (cubic molecules*) |
Ih |
Oh |
Td |
one Cn with n > 2 |
S2n colinear zu Cn; no other symmetry elements |
S2n |
|
n perpendicular to Cn |
withsh |
Dnh |
without sh |
with sd |
Dnd |
without sd |
Dn |
no n perpendicular to Cn |
with sh |
|
Cnh |
without sh |
with sv |
Cnv |
without sv |
Cn |
|
with S2 = i |
Ci = S2 |
without S2 = i |
with s |
|
Cs = C1h |
no symmetry elemts other than E |
C1 |
*The use of "cubic" is restricted to molecules with four three-fold axes
|