How do you determine pi and sigma bonds?

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How do you determine pi and sigma bonds?

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Answer 1 · 2016-04-05T07:31:19

A $sigma$ -bond is the first bond between two atoms, and a $pi$ -bond is any bond in excess to that.

Explanation:

For two atoms to join they have to have at least one bond between them. This is the $sigma$ bond.

Any bonds in excess to the $sigma$ are called $pi$ -bonds. For example, a double bond has one $sigma$ and one $pi$ , while a triple bond has one $sigma$ and two $pi$ . Whatever the bond, it can only ever have one $sigma$

On an $n$ -bond, where $n$ is the number of covalent bonds between two atoms, it is made of

$n -> sigma + (n-1)pi$

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How do you determine pi and sigma bonds?

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