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JEE Main202227 Jun 2022Morning ShiftChemistryCoordination CompoundsActual

Which of the following will have maximum stabilization due to crystal field?

Options

  1. ATi H 2 O 6 3 +
  2. BCo H 2 O 6 2 +
  3. CCo CN 6 3 -
  4. DCu NH 3 4 2 +

Correct answer

C. Co CN 6 3 -

Step-by-step solution

Co H 2 O 6 2 + ;   t 2 g 6 e g 0 ; CFSE = - 0 . 4 × 6 + 0 . 6 × 1 Δ o + 2 P = − 1 . 8 Δ o + 2 P Co CN 6 3 - ;   t 2 g 6 e g 0 ; CFSE = - 0 . 4 × 6 + 0 . 6 × 0 Δ o + 2 P = − 2 .4 Δ o + 2 P Since CN - 1 is a strong field ligand, Δ o of this complex will be higher than that of Co H 2 O 6 3 +

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