Hybridization of Orbitals

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Pi () bonds exist in the region above and below a line drawn between two bonded atoms.

Slide 19

Sigma and Pi Bonds

Single Bonds

Ethane

1  bond

Slide 20

Sigma and Pi Bonds: Double bonds

Ethene

1  bond

1  bond

Slide 21

Sigma and Pi Bonds Triple Bonds

Ethyne

1  bond

1  bond

1  bond

Slide 22

The De-Localized Electron Model

Pi bonds () contribute to the delocalized model of electrons in bonding, and help explain resonance

Electron density from  bonds can be distributed symmetrically all around the ring, above and below the plane.