Q. Pick out the complex compound in which the central metal atom obeys EAN rule strictly
A) $K_{4}\lbrack Fe(CN)_{6}\rbrack$
B) $K_{3}\lbrack Fe(CN)_{6}\rbrack$
C) $\left\lbrack Cr\left( H_{2}O \right)_{6} \right\rbrack{Cl}_{3}$
D) $\left\lbrack Cu\left( {NH}_{3} \right)_{4} \right\rbrack{SO}_{4}$
Explanation
(a)
For $K_{4}\lbrack Fe(CN)_{6}\rbrack$, the EAN of ${Fe}^{2 +}$ ion =(26$-$2+12) =36 .
Hence it follows EAN rule, as its EAN is equal to number of electrons of Kr (inert gas), i.e., 36.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.