Sigma/Pi Bonds


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Jessica Helfond 2F
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Sigma/Pi Bonds

Postby Jessica Helfond 2F » Sat Nov 24, 2018 8:11 pm

Could someone explain how we know how many sigma/pi bonds there are within a molecule?

Joon Chang 2F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: Sigma/Pi Bonds

Postby Joon Chang 2F » Sat Nov 24, 2018 8:15 pm

First draw the Lewis structure. Then determine what bonds there are according to the types of bonds. A single bond is a sigma, double bond has one sigma and one pi, triple bond has one sigma and two pi.

Raymond Ko 1H
Posts: 29
Joined: Fri Sep 28, 2018 12:19 am

Re: Sigma/Pi Bonds

Postby Raymond Ko 1H » Sat Nov 24, 2018 8:16 pm

When you draw the lewis structure for a molecule, all of the single bonds are sigma bonds. When you see a double bond or triple bond, the bond consists of a single bond and a pi bond for every additional bond required for the molecule to form. For example, a C2H4 molecule has 5 sigma bonds and 1 pi bond.

shouse1f
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: Sigma/Pi Bonds

Postby shouse1f » Sat Nov 24, 2018 8:41 pm

what is the significance of sigma/pi bonds?

Hanniel U 2B
Posts: 76
Joined: Fri Sep 28, 2018 12:16 am

Re: Sigma/Pi Bonds

Postby Hanniel U 2B » Sat Nov 24, 2018 8:46 pm

Sigma and pi bonds are chemical covalent bonds. Sigma bond has been referred to as the strongest type of covalent bond.

Mhun-Jeong Isaac Lee 1B
Posts: 54
Joined: Fri Sep 28, 2018 12:17 am

Re: Sigma/Pi Bonds

Postby Mhun-Jeong Isaac Lee 1B » Sat Nov 24, 2018 11:49 pm

Single bonds involve one sigma bond and double bonds involve one sigma and one pi bond. The importance of a pi bond is that it restricts rotation while sigma bonds do not.


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