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sigma and pi bonds

Posted: Sun Nov 18, 2018 11:35 pm
by Josephine Lu 4L
what is the difference between a sigma and pi bond?

Re: sigma and pi bonds

Posted: Sun Nov 18, 2018 11:41 pm
by Zenita Leang 2K
Sigma bonds allow bound atoms to rotate, meaning the electron density has cylindrical symmetry around the axis. Pi bonds do not allow bound atoms to rotate and thus the electron density is on each side of the internuclear axis. Sigma bonds also interact from one bond to the other while pi bonds overlap each other side by side.

Re: sigma and pi bonds

Posted: Sun Nov 18, 2018 11:43 pm
by jessicahe4Elavelle
A σ bond has cylindrical symmetry while a π bond has a nodal plane that includes the bond axis.