COMEDK2013ChemistryCoordination Compounds
Pick out the complex compound in which the central metal atom obeys EAN rule strictly.
Options
- AK ₄ [ Fe ( CN )₆ ]
- BK ₃ [ Fe ( CN )₆ ]
- C[ Cr ( H ₂ O )₆ ] Cl ₃
- D[ Cu ( NH ₃ )₄ ] SO ₄
Correct answer
A. K ₄ [ Fe ( CN )₆ ]
Step-by-step solution
In K ₄ [ Fe ( CN )₆ ] , the central metal atom obeys EAN rule. EAN =Z-X+Y=26-2+12=36 where, Z = atomic number X= number of electrons lost, while forming metal ion. Y= number of electron donated by ligands.