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JEE Main202125 Jul 2021Evening ShiftChemistryCoordination CompoundsActual

Which one of the following metal complexes is most stable?

Options

  1. ACo ( en ) NH 3 4 Cl 2
  2. BCo ( en ) 3 Cl 2
  3. CCo ( en ) 2 NH 3 2 Cl 2
  4. DCo NH 3 6 Cl 2

Correct answer

B. Co ( en ) 3 Cl 2

Step-by-step solution

Complex Co ( en ) 3 Cl 2 is most stable complex among the given complex compounds because more number of chelate rings are present in this complex as compare to others. 1 Co ( en ) NH 3 4 Cl 2    1 chelate ring 2 Co ( en ) 3 Cl 2    3 chelate ring 3 Co ( en ) 2 NH 3 2 Cl 2    2 chelate ring (4) Co NH 3 6 Cl 2     0 chelate ring

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