A pi bond (π bond) is a type of covalent bond that occurs when two atomic orbitals overlap in such a way that there is a region of electron density above and below the axis connecting the two nuclei of the bonding atoms. Pi bonds are typically formed between p orbitals that are aligned parallel to each other. Pi bonds usually occur in conjunction with sigma bonds (σ bonds).

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Pi bond by Ciro Santilli 37 Updated +Created