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JEE Main201815 Apr 2018Evening ShiftChemistryCoordination CompoundsActual

The total number of possible isomers for squareplanar [ Pt ( Cl ) ( NO ₂ ) ( NO ₃ )( SCN ) ]²⁻ is:

Options

  1. A16
  2. B12
  3. C8
  4. D24

Correct answer

B. 12

Step-by-step solution

The square planar complex of the type [ Mabcd ]^ n , where all four ligands are different, has 3 geometrical isomers. But if one of the ligands is ambidentate, then 2 3=6 geometrical isomers are possible. But if two ligands are ambidentate, then 4 3= 12 geometrical isomers are possible. In the given example, NO ₂⁻ and SCN ⁻ are ambidentate ligands.

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