Electron density and pi bonds

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Jessa Maheras 4F
Posts: 121
Joined: Fri Aug 02, 2019 12:16 am

Electron density and pi bonds

Postby Jessa Maheras 4F » Sun Nov 24, 2019 8:47 pm

What does it mean for electron density to be spread along the nuclear axis rather than on each side of the internuclear axis? Which corresponds to sigma and which to pi bonds?

zachary_nhem_4I
Posts: 57
Joined: Sat Aug 17, 2019 12:18 am

Re: Electron density and pi bonds

Postby zachary_nhem_4I » Sun Nov 24, 2019 9:23 pm

A sigma bond is cylindrically symmetric with no nodal planes and contains an internuclear axis, while a pi bond has a single nodal plane and contains the internuclear axis.

Amy Pham 1D
Posts: 103
Joined: Fri Aug 09, 2019 12:15 am

Re: Electron density and pi bonds

Postby Amy Pham 1D » Mon Nov 25, 2019 1:43 pm

In sigma bonds, the electron density is cylindrically symmetrical around the internuclear axis (the line connecting the nuclei of the atoms in question), resulting in a continuous, even distribution and no nodal planes. In pi bonds, there is a nodal plane at the internuclear axis, meaning that there is no electron density there and that it is on the sides of the internuclear axis rather than spread along it.


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