Identify the coordination complexes in which the central metal ion has $d^4$ configuration. Choose the…

Identify the coordination complexes in which the central metal ion has $d^4$ configuration.

Choose the correct answer from the options given below :
  1. (B), (C) and (D) only
  2. (C) and (E) only
  3. (B) and (D) only
  4. (A), (B) and (E) only

Solution

$\begin{aligned} & \mathrm{Fe}^{+6}=[\mathrm{Ar}] 3 \mathrm{~d}^2 \\ & \mathrm{Mn}^{+3}=[\mathrm{Ar}] 3 \mathrm{~d}^4 \\ & \mathrm{Fe}^{+3}=[\mathrm{Ar}] 3 \mathrm{~d}^5 \\ & \mathrm{Cr}^{+2}=[\mathrm{Ar}] 3 \mathrm{~d}^4 \\ & \mathrm{Ni}^{+4}=[\mathrm{Ar}] 3 \mathrm{~d}^6\end{aligned}$

Asked in: JEE Main 2025 (23 Jan Shift 2)

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