Verified Solution • 2025–26 Session moderate

QJEEM21Ch4136: JEE Main 2021 Chemistry - Class 12 JEEM21Ch4136 Solution: Which one of the following metal complexes is most stable?

Which one of the following metal complexes is most stable?

Multiple Choice Options

  • A [Co(en)(NH3)4]Cl2
  • B [Co(en)3]Cl2
  • C [Co(en)2(NH3)2]Cl2
  • D [Co(NH3)6]Cl2

Step-by-Step Verified Solution

Complex [Co(en)3]Cl2 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)(NH3)4]Cl2 1 chelate ring

(2) [Co(en)3]Cl2 3 chelate ring

(3) [Co(en)2(NH3)2]Cl2 2 chelate ring

(4) [Co(NH3)6]Cl2 0 chelate ring

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