Stretching modes of SF₆

6 Stretching modes in total, 1 A_1g, 2 E_g, 3 T_1u

E_g and T_1u are degenerate.

The A_1g, E_g, and T_1u M–L stretching modes of an octahedral ML₆ complex. The motion of the central metal atom M, which preserves the centre of mass of the molecule, is not shown (it is stationary in both the A_1g and E_g modes).

Vibrations of Distorted Polyhedra | Vibrations of PdCl₂(NH₃)₂