Given below are two statements: Statement I: N(CH3)3 and P(CH3)3 can act as ligands to form transition metal complexes.…
Chemical Bonding · Class 11 · JEE Main Previous Year Question
Given below are two statements:
Statement I: and can act as ligands to form transition metal complexes.
Statement II: As N and P are from the same group, the nature of bonding of and is always the same with transition metals.
Choose the most appropriate answer:
- a✓
Statement I is correct but Statement II is incorrect
- b
Statement I is incorrect but Statement II is correct
- c
Both Statement I and Statement II are correct
- d
Both Statement I and Statement II are incorrect
Statement I is correct but Statement II is incorrect
🧠 Both N and P are in Group 15 and have lone pairs — both can act as σ-donor ligands. However, their bonding behaviour with transition metals differs.
Statement I — Correct: and both donate their lone pair to a metal centre → both can act as ligands. ✓
Statement II — Incorrect: Despite being in the same group, their bonding is not identical. uses empty 3d orbitals for -backbonding with the metal (p→d), making it a stronger field ligand than . has no available d orbitals (2p only), so it can only σ-donate. The nature of bonding is fundamentally different. ✗
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