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Consider the two statements below. Statement-1: The pi(b) bonding and pi*(b) antibonding molecular orbitals formed from a pair of 2p atomic orbitals lie in the same plane. Statement-2: Bonding molecular orbitals arise from constructive (additive) overlap of atomic orbitals, whereas antibonding molecular orbitals arise from destructive (subtractive) overlap. Choose the correct option.

1. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
2. Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1
3. Statement-1 is true, statement-2 is false.
4. Statement-1 is false, statement-2 is true.

Correct answer: Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1

Solution

Both statements are individually correct, but the constructive/destructive overlap idea does not explain why the pi and pi* orbitals are coplanar (that follows from the common axis of the parent p orbitals).

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