
A linear molecule with an inversion center.
Example: H2



A linear molecule that does not have an inversion center.
Example: HCN



A nonlinear molecule that has 2 or more C_{n} symmetries (where n>2), an inversion center, and a C_{5} symmetry.
This is a high symmetry molecule.
Example: A buckey ball (C_{60})



A nonlinear molecule that has 2 or more C_{n} symmetries (where n>2), an inversion center, and does not have a C_{5} symmetry.
This is a cubic group.
This is a high symmetry molecule.
Example: SF_{6}



A nonlinear molecule that has 2 or more C_{n} symmetries (where n>2) but does not have an inversion center.
This is a cubic group.
This is a high symmetry group.
Example: CH_{4}



A nonlinear molecule that does not have 2 or more C_{n} symmetries (where n>2), but does have a C_{n} group. It has n C_{2} perpendicular to its C_{n} group and it has a ?_{h} plane.
This is a common point group.
Example: C_{2}H_{4} is ___2___



A nonlinear molecule that does not have 2 or more C_{n} symmetries (where n>2), but does have a C_{n} group. It has n C_{2} perpendicular to its C_{n} group. It does not have a ?_{h} plane, but it has n ?_{v} planes.
Example: C_{3}H_{4} is ___2____



A nonlinear molecule that does not have 2 or more C_{n} symmetries (where n>2), but does have a C_{n} group. It has n C_{2} perpendicular to its C_{n} group. It does not have a ?_{h} plane or a ?_{v} plane.
Example: [Co(en)3]3+ is ____3



A nonlinear molecule that does not have 2 or more C_{n} symmetries (where n>2), but does have a C_{n} group. It does not have n C_{2} perpendicular to its C_{n} group. It has a ?_{h} plane.
Example: B(OH)3 is ___3___



A nonlinear molecule that does not have 2 or more Cn symmetries (where n>2), but does have a C_{n} group. It does not have n C_{2} perpendicular to its C_{n} group. It does not have a ?_{h} plane, but it has n ?_{v} planes.
Example: Water is ___2___



A nonlinear molecule that does not have 2 or more Cn symmetries (where n>2), but does have a Cn group. It does not have n C_{2} perpendicular to its C_{n} group. It does not have a ?_{h} plane or n ?_{v} planes. It has S_{2N} symmetry.
This is not a common point group.
Example: 1,3,5,7 tetrafluoracyclooctatetrane is ___4



A nonlinear molecule that only has C_{n} function groups.
Example: C_{2}H_{4}Cl_{2}



A nonlinear molecule with two symmetry operations: E and ?_{h}
Example: CH_{2}BrCl



A nonlinear molecule with two symmetry operations: E and i.
Example: C_{2}H_{2}F_{2}Cl_{2}



A non linear molecule whose only symmetry is E.
Example: HCFBrCl

