Q. What is the correct electronic configuration of the central atom in $K_4[Fe(CN)_6]$ based on crystal field theory ?
A) $t_{2g}^4e_g^2$
B) $t_{2g}^6e_g^0$
C) $e^3t_2^3$
D) $e^4t_2^2$
Explanation
[Solution] $Fe^{2+}$ ($3d^6$) with strong-field $CN^-$ pairs up fully: $t_{2g}^6e_g^0$. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.