Pi and sigma bonds  [ENDORSED]

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CalebBurns3L
Posts: 47
Joined: Fri Sep 29, 2017 7:07 am

Pi and sigma bonds

Postby CalebBurns3L » Wed Nov 29, 2017 11:59 pm

Is the only difference between Pi and Sigma bonds that Pi bonds can rotate?

Nehal Banik
Posts: 64
Joined: Thu Jul 13, 2017 3:00 am

Re: Pi and sigma bonds

Postby Nehal Banik » Thu Nov 30, 2017 12:04 am

Sigma bonds can rotate, however Pi bonds cannot rotate because there are two distinct sigma bonds there, therefore forming a pi bond. If you attempted to rotate the compound, then the Pi bond would therefore break. Sigma Bonds are formed when the electron density is at the center of the bond, and it bonds ends to end with two 2pz1 orbitals, whereas a pi bond forms with two neighboring 2p orbitals and it forms side to side, therefore the electron density is not located between the bonds.

Manasvi Paudel 1A
Posts: 50
Joined: Sat Jul 22, 2017 3:00 am

Re: Pi and sigma bonds

Postby Manasvi Paudel 1A » Sun Dec 03, 2017 4:13 pm

I think the most important thing to know about pi and sigma bonds is that a single bond is a sigma bond and a double bond is a sigma and a pi bond. Pi bonds don't allow rotation.

diangelosoriano
Posts: 49
Joined: Fri Sep 29, 2017 7:07 am

Re: Pi and sigma bonds

Postby diangelosoriano » Mon Dec 04, 2017 10:20 am

Can anyone explain how pi and sigma bonds change with resonance structures?

Gurpreet Khamba 1J
Posts: 18
Joined: Fri Sep 29, 2017 7:04 am

Re: Pi and sigma bonds

Postby Gurpreet Khamba 1J » Mon Dec 04, 2017 10:27 am

Pi and Sigma bonds don't change with resonance structures. As you create the lewis structures, you understand that the representations do not accurately represent the molecule.

PranithaPrasad
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Re: Pi and sigma bonds

Postby PranithaPrasad » Mon Dec 04, 2017 11:34 am

If there's resonance, do the sigma and pi bonds become delocalized?

Chem_Mod
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Re: Pi and sigma bonds  [ENDORSED]

Postby Chem_Mod » Mon Dec 04, 2017 2:06 pm

Resonance delocalizes pi, but not sigma bonds.

Alex Nechaev 1I
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: Pi and sigma bonds

Postby Alex Nechaev 1I » Tue Dec 05, 2017 5:21 pm

If there's a resonance structure, the pi bonds will be delocalized. Sigma bonds don't become delocalized, so resonance has no effect on them.


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