Which of the following complex ions obeys Sidgwick’s effective atomic number (EAN) rule?

Chemistry · JEE Main · NTA Exams — Coordination Compounds

1. [Fe(CN)₆]^3–
2. [Fe(CN)₆]^4–
   
3. [Cr(NH₃)₆]³⁺
4. [Ni(en)₃]^2+`

Answer

(B) [Fe(CN) 6 ] 4–

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