Pi bonds

[sylvie_1D]

Hi, do Pi bonds only include the P orbital?

[jadam_1E]

Hi sylvie,
I know that a pi bond could also occur as a result of an overlap between orbitals that includes a hybridized orbital such as sp2 or sp3.

[Chem_Mod]

pi bonds are bonds that are formed by orbital overlap at 2 different nodes. This can be between p and p, sometimes between p and d.

[204765696]

If the atom has more than three valence electrons in its outer shell, three of the electron orbitals hybridize and one of the p orbitals remains unhybridized. It is the unhybridized p orbitals that then form pi bonds for double bonding. Just as with the sp2 hybrids, the unhybridized electrons can then form pi bonds.