We Can Figure This Out.org
Virtual Lab: Nanocarbon - From Graphene to Buckyballs
University of Virginia
             
 
© 2003-Present, John C. Bean
 
If the hydrogen atoms are stripped from a benzene molecule (converting it to a "phenyl group") this unit can be repeatedly bonded together into sheets of "graphene."

The bonding is the same: The first three carbon bonding electrons are tied up in sigma sp2 bonds within the plane. The fourth electron is in a pi configuration perpendicular to the plane. Pi elections on paired carbon atoms then link together to form pi bonds. And as those pairings rapidly change, a continuous moving cloud of pi electrons forms above and below the graphene plane. This movement of pi electrons means that graphene can conduct electrical current.

To show or hide pi bonds, click this button:

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