The complex with highest magnitude of crystal field splitting energy () is (A) [Mn(OH2)6]3+ (B) [Fe( — JEE Mains Chemistry Past Papers Chemistry Question
Question
The complex with highest magnitude of crystal field splitting energy () is (A) [Mn(OH2)6]3+ (B) [Fe(OH2)6]3+ (C) [Cr(OH2)6]3+ (D) [Ti(OH2)6]3+
Answer: C
💡 Solution & Explanation
In 3d series as M3+ ion size decreases, change density increase, so attraction b/w M3+ and ligand increase so 0 increase. Ti+3 = 67 pm , Cr+3 = 62 pm, Mn+3 = 65 pm, Fe+3 = 65 pm. So Cr+3 = 62 pm has highest tendency to attract ligand. Hence 0 is more for Cr+3 complex.
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