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Sigma and pi

Posted: Wed Nov 15, 2017 12:50 pm
by Adam Enomoto 1L
In every double bond, is it always 1 sigma and 1 pi bond?

Re: Sigma and pi

Posted: Wed Nov 15, 2017 12:54 pm
by Alex Nechaev 1I
Yes. A single bond such as (C-H) has one sigma bond whereas a double (C=C) and triple (C≡C) bond has one sigma bond with remaining being pi bonds.

Re: Sigma and pi

Posted: Wed Nov 15, 2017 2:09 pm
by Mitch Mologne 1A
Yes and this is due to the molecule having a non-hybrid p orbital.

Re: Sigma and pi

Posted: Sun Nov 26, 2017 10:18 pm
by Erik Khong 2E
Yes because the first bond is always a sigma bond and any other subsequent bonds are pi bonds.

Re: Sigma and pi

Posted: Tue Nov 28, 2017 6:30 pm
by Lorie Seuylemezian-2K
Is the single sigma bond always the "center" bond?

Re: Sigma and pi

Posted: Wed Nov 29, 2017 7:09 pm
by Sophie 1I
Sigma bonds are always the first bonds to form and are single bonds and the remaining bonds are pi bonds. In an example of N2, the 2 pi bonds will appear to surround the single sigma bond when the electron densities of the pi bonds combine.

Re: Sigma and pi

Posted: Sat Dec 02, 2017 10:12 pm
by DAllaf
Yes, every double bond has 1 sigma and 1 pi bond. The first bond is always sigma and then subsequently they are pi bonds. So single bonds have 1 sigma bond, double bonds have 1 sigma and 1 pi, and tripe bonds have 1 sigma and 2 pi bonds.

Re: Sigma and pi

Posted: Sun Dec 03, 2017 10:28 am
by Jesus Rodriguez 1J
Yes, every first bond is a sigma bond and the rest of the bond that follow(like the 2nd bond in a double bond) are pi bonds.

Re: Sigma and pi

Posted: Thu Dec 07, 2017 11:46 pm
by Troy Tavangar 1I
Yes, the first bond is always a sigma bond and each additional bond is a pi bond. For example, a triple bond would contain 1 sigma bond and 2 pi bonds.

Re: Sigma and pi

Posted: Sun May 27, 2018 6:05 pm
by QuincyH1G
Why do they form in that order?

Re: Sigma and pi

Posted: Sun May 27, 2018 7:08 pm
by Amanda 1A
sigma bonds result from the formation of a molecular orbital by the head-to-head overlap of atomic orbitals, and pi bonds result by side-to-side overlap (with p orbitals). pi bonds can only happen when the head to head overlapping of orbitals has also already occurred. however, a sigma bond can happen without side-to-side overlap.

Re: Sigma and pi

Posted: Sun May 27, 2018 8:31 pm
by princessturner1G
Yes, a double bond is one sigma plus one pi bond. While a triple bond is a sigma bond plus two pi bonds.

Re: Sigma and pi

Posted: Sun May 27, 2018 9:20 pm
by Anthony Mercado 1K
If every double bond is one sigma and one pie bond, why not simply denote double bonds as such since the beginning? Or is this statement not reversible, in which a sigma and pie bond together do not always make a double bond?