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Rotation

Posted: Sun Nov 24, 2019 2:44 am
by Jedrick Zablan 3L
Why can sigma bonds rotate but pi bonds can't?

Re: Rotation

Posted: Sun Nov 24, 2019 2:46 am
by Hannah Pham
Sigma bonds have their electron density along the bond axis, while pi bonds have their electron density above and below the bond axis. Therefore, the pi bonds cannot rotate like the sigma bonds because rotating would break the pi bond.

Re: Rotation

Posted: Sun Nov 24, 2019 2:52 am
by WesleyWu_1C
Pi bonds interact side to side, so when molecules rotate, the p-orbitals would no longer be side to side, which would break the pi bonds.

Re: Rotation

Posted: Sun Nov 24, 2019 3:10 am
by Haley Pham 4I
Pi bonds consist of orbitals that are aligned side-by-side, in which one of the two orbitals cannot align in a different position to make the bond. Sigma bonds consist of orbitals that are aligned end-to-end, which allow them to rotate.