## Pi bonds and Sigma bonds

$sp, sp^{2}, sp^{3}, dsp^{3}, d^{2}sp^{3}$

Akshay Anand
Posts: 20
Joined: Fri Sep 29, 2017 7:07 am

### Pi bonds and Sigma bonds

What hybrid orbitals bond together in a linear molecule of ethyne? (H-C---C-H). The three dashes between carbons represent a triple bond. How exactly do each hybrid orbital bond to form sigma and pi bonds?

miznaakbar
Posts: 55
Joined: Thu Jul 13, 2017 3:00 am
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### Re: Pi bonds and Sigma bonds

For ethyne, each carbon is bonded to two atoms, therefore it will have two hybridized orbitals. This will lead to the formation of two sp hybridized orbitals and leaves 2 regular p orbitals. Now when we draw the orbitals, we will have two sp orbitals sticking out of the sides of each C atom. Both the C atoms also have 2 p orbitals each. Where the two sp orbitals of the C atoms overlap, a sigma bond forms. Where the H atoms' s orbitals overlap with both the C atoms' other sp orbital, there is another two sigma bonds. Now where the p orbitals of both the C atoms overlap, there are two pi bonds. This explanation is probably pretty difficult to visualize, so here is a great khan academy video that pretty much explains all of this for the ethyne molecule, hope it helps! https://www.khanacademy.org/science/org ... -jay-final