Sigma and Pi Bonds


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Juliet Stephenson 4E
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Joined: Wed Sep 18, 2019 12:21 am

Sigma and Pi Bonds

Postby Juliet Stephenson 4E » Sun Nov 24, 2019 11:42 pm

I am confused about how we can identify sigma and pi bonds in a molecule. Will someone please explain? Thank you!

Charisse Vu 1H
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Joined: Thu Jul 25, 2019 12:17 am

Re: Sigma and Pi Bonds

Postby Charisse Vu 1H » Sun Nov 24, 2019 11:44 pm

In a molecule, you can identify sigma and pi bonds by counting the number of single, double, and triole bonds it has. Every single bond is a sigma bond, every double bond has 1 sigma bond and 1 pi bond, and every triple bond has 1 sigma bond and 2 pi bonds.

Alfred Barrion 2H
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Joined: Sat Jul 20, 2019 12:16 am

Re: Sigma and Pi Bonds

Postby Alfred Barrion 2H » Sun Nov 24, 2019 11:44 pm

Usually a sigma bond occurs in single bonds, double bonds and triple bonds.
pi bonds are found in double and triple bond.
Each bond type has a sigma bond
Ex. Double bond=one sigma, one pi
Triple bond: one sigma, two pi

505306205
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Joined: Thu Jul 25, 2019 12:15 am

Re: Sigma and Pi Bonds

Postby 505306205 » Sun Nov 24, 2019 11:47 pm

All single bonds are sigma bonds. In double or triple bonds, there is one sigma bond and the rest are pi.

Naji Sarsam 1F
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Re: Sigma and Pi Bonds

Postby Naji Sarsam 1F » Sun Nov 24, 2019 11:48 pm

There are two characteristics of bonds that we need to know: the number of bonds and the type of bonds.

The number of bonds refers to whether it is a single, double, or triple bond.

The type of bond refers to whether the bond is a sigma or pi bond. A sigma bond is one where the electron clouds overlap head-on. Every single bond is a sigma bond. A pi bond is one where the electron clouds overlap side by side. Every extra bond after the single bond is a pi bond. So in every double bond, one of the bonds is a sigma bond and the other is a pi bond. In every triple bond, one bond is a sigma bond, the other two are pi bonds.

nicole-2B
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Re: Sigma and Pi Bonds

Postby nicole-2B » Mon Nov 25, 2019 5:33 pm

a single bond has one sigma bond, a double bond has one sigma and one pi bond, and a triple bond has one sigma and two pi bonds

Cooper Baddley 1F
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Re: Sigma and Pi Bonds

Postby Cooper Baddley 1F » Mon Nov 25, 2019 5:50 pm

Pi bonds only occur as the other bonds in double and triple bonds. For example, a double has one sigma and one pi bond and a triple bond has one sigma and two pi bonds.

Kylie Lim 4G
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Re: Sigma and Pi Bonds

Postby Kylie Lim 4G » Mon Nov 25, 2019 6:21 pm

A single bond has a sigma bond, a double is one sigma and one pi, and a triple is one sigma and two pi. I think this is something that is best to just memorize.

Mariepahos4D
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Re: Sigma and Pi Bonds

Postby Mariepahos4D » Mon Nov 25, 2019 6:29 pm

a single bond is always a sigma bond and a double bond is always one sigma and one pi bond. A triple bond would be one sigma and 2 pi bonds

Alexis Robles 2k
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Re: Sigma and Pi Bonds

Postby Alexis Robles 2k » Mon Nov 25, 2019 6:59 pm

A single bond is always a pi bond, a double bond is one sigma and one pi bond. A triple bond is two pi bonds on the outsides and a sigma bond in the middle.

Megan Jung 3A
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Joined: Thu Jul 11, 2019 12:17 am

Re: Sigma and Pi Bonds

Postby Megan Jung 3A » Tue Nov 26, 2019 9:38 pm

single bonds = sigma bond
double bonds = sigma bond and pi bond
triple bonds= sigma bond and 2 pi bonds

Emily_4B
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Joined: Wed Sep 18, 2019 12:21 am

Re: Sigma and Pi Bonds

Postby Emily_4B » Wed Nov 27, 2019 12:16 am

All single bonds are sigma bonds and while double bonds have 1 pi bond and triple bonds have 2 pi bonds

Shrayes Raman
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Re: Sigma and Pi Bonds

Postby Shrayes Raman » Wed Nov 27, 2019 2:28 am

Sigma bonds allow rotation as they have one axis of connection whereas pi bonds have two.

Natalie Nartz 4F
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Re: Sigma and Pi Bonds

Postby Natalie Nartz 4F » Wed Nov 27, 2019 5:41 pm

Every bond has a sigma bond. A single bond has one sigma bond. A double bond has one sigma bond and one pi bond. A triple bond has one sigma bond and two pi bonds.

Nuoya Jiang
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Joined: Sat Sep 14, 2019 12:17 am

Re: Sigma and Pi Bonds

Postby Nuoya Jiang » Wed Nov 27, 2019 6:41 pm

Single bond: sigma bond
Double bond: one sigma bond+one pi bond
Triple bond: one sigma bond+two pi bonds

AGulati_4A
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Re: Sigma and Pi Bonds

Postby AGulati_4A » Wed Nov 27, 2019 7:25 pm

Single = Sigma, Double = Sigma +Pi

Eunice Nguyen 4I
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Joined: Sat Aug 17, 2019 12:17 am

Re: Sigma and Pi Bonds

Postby Eunice Nguyen 4I » Wed Nov 27, 2019 8:57 pm

Single bonds are sigma bond, all double bonds have 1 sigma bond and 1 pi bond, and every triple bond has 1 sigma bond and 2 pi bonds.

Adrianh72
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Joined: Sat Aug 17, 2019 12:16 am

Re: Sigma and Pi Bonds

Postby Adrianh72 » Wed Nov 27, 2019 11:21 pm

The way I go about this (specifically on Test #2) is I label one bond as a sigma bond in each bond and then go back and fill the rest in with pi bonds.

Kevin Liu 1J
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Joined: Thu Jul 25, 2019 12:16 am

Re: Sigma and Pi Bonds

Postby Kevin Liu 1J » Wed Nov 27, 2019 11:25 pm

In terms of bonds, the simples way to remember sigma and pi bonds is to differentiate by bond length:
single bond = 1 sigma bond
double bond = 1 sigma bond, 1 pi bond
triple bond = 1 sigma bond, 2 pi bonds

KMenjivar_3A
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Joined: Mon Jan 07, 2019 8:05 am

Re: Sigma and Pi Bonds

Postby KMenjivar_3A » Wed Nov 27, 2019 11:40 pm

Sigma bonds are single bonds
Double bonds contain on sigma bond plus another bond which is a pi bind.
Triple binds contain one sigma bond and two pi bonds.

Joelle 3L
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Re: Sigma and Pi Bonds

Postby Joelle 3L » Thu Nov 28, 2019 3:28 pm

Every single bond will be a sigma bonds. Every double bond would have one sigma bond then a pi bond. Triple bonds include one sigma bond and two pi bonds.

ranqiao1e
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Re: Sigma and Pi Bonds

Postby ranqiao1e » Fri Nov 29, 2019 9:34 pm

All single covalent bonds have one and only one sigma bond, while double bonds and triple bonds have multiple pi bonds


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