Rotation

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Jedrick Zablan 3L
Posts: 68
Joined: Sat Aug 17, 2019 12:17 am

Rotation

Postby Jedrick Zablan 3L » Sun Nov 24, 2019 2:44 am

Why can sigma bonds rotate but pi bonds can't?

Hannah Pham
Posts: 104
Joined: Fri Aug 09, 2019 12:17 am

Re: Rotation

Postby Hannah Pham » Sun Nov 24, 2019 2:46 am

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.

WesleyWu_1C
Posts: 117
Joined: Thu Jul 25, 2019 12:16 am

Re: Rotation

Postby WesleyWu_1C » Sun Nov 24, 2019 2:52 am

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.

Haley Pham 4I
Posts: 51
Joined: Fri Aug 09, 2019 12:16 am

Re: Rotation

Postby Haley Pham 4I » Sun Nov 24, 2019 3:10 am

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.


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