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Transition metal complex with highest value of crystal field splitting Δ 0 will be

Options

  1. AMo H 2 O 6 3 +
  2. BCr H 2 O 6 3 +
  3. COs H 2 O 6 3 +
  4. DFe H 2 O 6 3 +

Correct answer

C. Os H 2 O 6 3 +

Step-by-step solution

H 2 O is a weak field ligand. Crystal field stabilisation energy is maximum for d 3 and d 8 cases with weak field ligands among the 3d-series elements.But CFSE increases from 3d to 5d series elements due to the increase in nuclear charge. Hence, Os H 2 O 6 3 + complex case, the CFSE is maximum.

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