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sigma and pi bonds

Posted: Sun Nov 25, 2018 9:04 pm
by 505095793
Why can sigma bonds rotate, but not pi bonds?

Re: sigma and pi bonds

Posted: Sun Nov 25, 2018 9:14 pm
by Hanlin Zhu 4G
A sigma bond is in direction along the bond axis, like a stick connecting two balls, so atoms can rotate freely. The pi bonds is formed above and below the sigma bond, so it is only stable in one orientation and cannot rotate.

Re: sigma and pi bonds

Posted: Mon Nov 26, 2018 4:33 pm
by Noh_Jasmine_1J
sigma bonds are located on the axis and so they are able to rotate around it, but pi bonds are located above and below the axis and therefore cannot rotate

Re: sigma and pi bonds

Posted: Tue Nov 27, 2018 9:12 am
by daniella_knight1I
A pi bond is a nodal plane in the internuclear axis, therefore, it cannot rotate because it is holding together at two points in the nucleus.

Re: sigma and pi bonds

Posted: Thu Nov 29, 2018 10:57 pm
by Carlos De La Torre 2L
a sigma bond can rotate because it is connected at one point so the atoms can rotate freely, in a double or triple bond (containing a sigma and pi bonds) there are connections at either 3 or 5 points and so if it was to rotate, it would need to break the bonds at those points and reform them at the new points, which is just not going to happen by itself.