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π bondZoomA-Z

Subject - General Chemistry, Quantum Physics

Fig.1

A π bond is a covalent bond with a node along the connecting line between the nuclei of two atoms. The charge density is distributed above and below the node. A π bond is generated by the overlap of p- and d-orbitals with appropriate geometry, i.e. the orbitals have to be vertical to the axis of the molecule, for example py-py, pz-pz, pz-dxz, dxz-dxz. Because of less overlap, π bonds are weaker than σ bonds. Double or triple bonds consist of one σ bond and one or two π bonds, respectively.