 | Pi bond | Sigma bond |
|---|---|---|
| Introduction (from Wikipedia) | In chemistry, pi bonds are covalent chemical bonds where two lobes of one involved atomic orbital overlap two lobes of the other involved atomic orbital. | In chemistry, sigma bonds are the strongest type of covalent chemical bond. They are formed by head-on overlapping between atomic orbitals. Sigma bonding is most clearly defined for diatomic molecules using the language and tools of symmetry groups. |
| strength of bond | it is a weak bond | it is a strong bond |
| rotation of atoms | free rotation of atoms about the bond is not possible | free rotation of atoms about the bond is possible |
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