Exam

JEE Main

Year

2025

Date

2 April

Shift

Evening Shift

Subject

Chemistry

Chapter

Coordination Compounds

JEE Main 2025 · 2 April · Evening Shift · Chemistry · Coordination Compounds

The d-orbital electronic configuration of the complex among...

The d-orbital electronic configuration of the complex among $\quad\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}, \quad\left[\mathrm{CoF}_6\right]^{3-}$, \left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+} and \left[\mathrm{Zn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+} that has the highest CFSE is :

Step-by-step solution

In $\left[\mathrm{Co}(\mathrm{en})_3\right]^{+3}$ S.F.L. is present and hence highest value of CFSE
In rest all complexes WFL is present hence CFSE will be low.
$\left[\mathrm{Co}(\mathrm{en})_3\right]^{+3} \Rightarrow \mathrm{Co}^{+3}$ and en (SFL)
$\mathrm{Co}^{+3} \Rightarrow[\mathrm{Ar}] 3 \mathrm{~d}^6$