a27 - two different kinds of molecular bonds called...

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Hybridization Involving Multiple Bonds Only a maximum of two electrons can occupy any orbital whether it is an atomic orbital or a molecular orbital due to electron-electron repulsion. When we draw a double or a triple-bond between two atoms, we imply that either four or six electrons are directly between these two atoms. Since this is impossible, we must have these extra electrons off to the side in what we refer to as pi bonds. Therefore, all multiple bonds are composed of
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Unformatted text preview: two different kinds of molecular bonds called pi-bonds and sigma-bonds. The sigma-bond is defined as the linear overlap of atomic orbitals (hybrids except for hydrogen) in which two electrons are directly between the two bonded nuclei. Pi-bonds are defined as the parallel overlap of p-orbitals. A double bond has one sigma-bond and one pi-bond. A triple bond thus consists of a sigma-bond and two pi-bonds with the pi-bonds in different planes....
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This note was uploaded on 04/28/2010 for the course ENGN 45 taught by Professor Wendy during the Fall '09 term at City College of San Francisco.

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