Which of the following transition metal ions in an octahedral weak crystal field will have the greatest crystal field stabilization energy (CFSE)?

Answer and explanation

Correct answer: B.

  1. Step 1: Calculate CFSE for each configuration in an octahedral field.
  2. Step 2: For (): electrons fill , giving .
  3. Step 3: For high-spin and (): , giving . For (): . Thus has the largest stabilization magnitude.
Answer
().
Why not the others: ( high-spin) has ; ( high-spin) has ; () has .

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