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Given below are two statements :Statement (I) : A ππ bonding MOMO has lower electron density above and below the inter-nuclear axis.Statement (II) : The π∗π* antibonding MOMO has a node between the nuclei.In light of the above statements, choose the most appropriate answer from the options given below:JEE Main 2024 (01 Feb Shift 2)ABoth Statement I and Statement II are falseBBoth Statement I and Statement II are trueCStatement I is false but Statement II is trueDStatement I is true but Statement II is false

Question

Given below are two statements :Statement (I) : A ππ bonding MOMO has lower electron density above and below the inter-nuclear axis.Statement (II) : The π∗π* antibonding MOMO has a node between the nuclei.In light of the above statements, choose the most appropriate answer from the options given below:JEE Main 2024 (01 Feb Shift 2)ABoth Statement I and Statement II are falseBBoth Statement I and Statement II are trueCStatement I is false but Statement II is trueDStatement I is true but Statement II is false

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Solution

The correct answer is B. Both Statement I and Statement II are true.

Statement I is true because a pi bonding molecular orbital (MOMO) is formed by the side-on overlap of two p orbitals. This results in a region of high electron density above and below the inter-nuclear axis, but not directly on it.

Statement II is also true because a pi* antibonding molecular orbital has a node between the nuclei. This is due to the out-of-phase overlap of the two p orbitals, which results in a region of zero electron density (a node) between the nuclei.

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