Sigma bond and Pi bonds

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Saima Salam 3J
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

Sigma bond and Pi bonds

Postby Saima Salam 3J » Fri Nov 16, 2018 10:59 pm

What are the significance of sigma and pi bonds and what do they represent? How would we draw sigma and pi bonds?

Tarika Gujral 1K
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

Re: Sigma bond and Pi bonds

Postby Tarika Gujral 1K » Sat Nov 17, 2018 11:43 am

Sigma bonds = overlap of two s orbitals, overlap of s and one lobe of p, overlap of 2 p orbitals (one lobe only)
Pi bonds = both lobes of p orbitals overlap — atoms cannot rotate

Single bonds = sigma bond
Double bond = sigma and pi bond
Triple bond = sigma and 2 pi bonds

Letizia Ye 4F
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

Re: Sigma bond and Pi bonds

Postby Letizia Ye 4F » Sat Nov 17, 2018 1:46 pm

A single bond consists of a sigma bond, a double bond consists of a sigma and pi bond, while a triple bond consists of a sigma and two pi bonds. Sigma bonds are formed in 3 conditions: 2 s-orbitals overlap, 1 s-orbital and 1 lobe of a p-orbital overlap, and when one lobe of each p-orbital overlaps with each other. Pi bonds form when both of the p-orbital lobes overlap.


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