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  4. Which one of the following compound is not a planar?

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Q. Which one of the following compound is not a planar?

NTA AbhyasNTA Abhyas 2020

Solution:

Solution

Here hybridisation of oxygen is $sp^{3}$ . so it cannot be a planar molecule. In it lone pair of oxygen does not involve in delocalisation, otherwise it will become antiaromatic compound. Rest other are planar as they have only $sp^{2}$ hybridisation.