Pi Bond
| Formula / Notation | π bond: sideways p-p orbital overlap; present in double and triple bonds |
|---|---|
| Also Known As | Pi bond, π bond, lateral overlap bond, pi-electron bond |
What is Pi Bond?
A covalent bond formed by sideways overlap of p orbitals, creating regions of electron density above and below the internuclear axis. Pi bonds are weaker than sigma bonds and cannot rotate freely. They are found in double bonds (one π bond) and triple bonds (two π bonds).
Formula & Notation
Other Names / Synonyms: Pi bond, π bond, lateral overlap bond, pi-electron bond
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A covalent bond formed by sideways overlap of p orbitals, creating regions of electron density above and below the internuclear axis. Pi bonds are weaker than sigma bonds and cannot rotate freely. They are found in double bonds (one π bond) and triple bonds (two π bonds).
Pi bonds are central to: organic chemistry (alkene and alkyne reactions: electrophilic addition, cycloaddition), aromatic chemistry (delocalised π systems in benzene), conjugation and chromophore design (dye and drug chromophores depend on π→π* transitions), organometallic chemistry (η² to η⁶ ligand…
Compounds with reactive π bonds (strained alkenes, alkynes, cumulenes) can react explosively or rapidly under the right conditions. Acrolein (CH₂=CHCHO) is a bis-electrophilic toxic compound due to its conjugated π system. Allylic and vinylic radicals from π bond homolysis are reactive species.
The formula or notation for Pi Bond is: π bond: sideways p-p orbital overlap; present in double and triple bonds