Rotation occurs freely around what hybridization?

1 Answer
Apr 16, 2017

Any and all hybridizations.

All hybrid orbitals can only make #sigma# bonds (i.e. a single bond, or the first bond in a double or triple bond). These #sigma# bonds are formed from atomic orbitals that are infinitely symmetric about the internuclear axis. That means a rotation about the internuclear axis by an infinitely small angle returns the same molecule back.

Therefore, any #sigma# bond can rotate without breaking the symmetry of the molecule (the symmetry must be maintained in order for the bond to stay intact).

Hence, any bonds made with a hybrid orbital can rotate freely.