Click the Symmetry Operations above to view them in 3D
Water contains one C2 rotation and 2σv planes.
An H2O molecule may be rotated through any angle about the bisector of the HOH bond angle, but only a rotation of 180° (the C2 operation) leaves it apparently unchanged. The two vertical mirror planes σv and σ′v in H2O and the corresponding operations. Both planes cut through the C2 axis.