Question

which of the following structure has decolalised pi electron:
1. Co2
2. HCN
3. O3
4. Co​

Answer 1

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The answer is o3

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Answer 2

Answer:

Ozone (O₃) has delocalized pi electrons.

Therefore, the option (3) is correct.

Explanation:

• Delocalization can be described as the movement of electrons from one place to another within the same molecule to acquire stable positions.
• This movement of electrons is not possible in the bonded state inside a molecule. Delocalization occurs when electrons of pi bond freely move. Delocalized molecule never remain at one place, they tend to rotate. Delocalized electrons formed resonating structures of the molecule. Therefore, system gets extra stability.
• Ozone has delocalized pi electrons. Ozone has bent structure and the bond angle is equal to 118°. Hybridization of ozone is sp² and geometry trigonal planar. The remaining p -orbitals are formed the pi bond by side wise overlapping with either of outer oxygen.
• For the delocalization of electrons the basic condition is the pi orbitals should be in the same plane. Delocalization is possible when the molecule has alternate single or double bonds. For example benzene.