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Question

How many sigma and pi bonds are present in benzene?


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Solution

Sigma and pi bonds:

  1. The sigma bond is the strongest covalent link formed by the head-on overlapping atomic orbitals.
  2. They can be found in alkanes, alkenes, and alkynes.
  3. One sigma and one pi bond combine to produce a double bond.
  4. Pi bonds are covalent chemical bonds that involve the lateral overlapping of two lobes of one atomic orbital with two lobes of another atomic orbital from a different atom.

Benzene:

  1. It is an aromatic compound with a chemical formulaC6H6.
  2. Each carbon in benzene is bonded to another carbon and hydrogen. As a result, each carbon will have two sigma bonds, one with another carbon and the other with hydrogen.
  3. Number of sigma bonds=6×212
  4. To make a pi bond, every two carbons will overlap axially.
  5. Number of pi bonds=6÷23

Therefore, there are 12 sigma bonds and 3 pi bonds in benzene.


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