sentence: Pi bonds happen when two atomic orbitals are in contact through two areas of overlap.
sentences_after: Pi-bonds are more spread out bonds than the sigma bonds. Electrons in pi bonds are sometimes called 'pi electrons'. Molecular fragments joined by a pi bond cannot rotate about that bond without breaking the pi bond. The rotation destroys the parallel paths of the two p orbitals.
concept_name: pi bond
headings: Pi bond
categories: Chemical bonding