How are sigma and pi bonds form?

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How are sigma and pi bonds form?

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Answer 1 · 2016-12-06T07:14:31

They form from orbital overlap. Sigma bonds will form for single bonds between species and pi bonds form when the bond order is 2 or greater.

Explanation:

For a bonding species, the formation of a $σ$ $sigma$ bond is denoted by a single bond between the species and $π$ $pi$ bonds form for the double and triple bonds that occur within the bonding species thereafter.

Consider the molecular orbital manifold shown below:
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How are sigma and pi bonds form?

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