JEE MAIN - Chemistry (2025 - 24th January Evening Shift - No. 13)
The conditions and consequence that favours the $t_{2 \mathrm{~g}}{ }^3 \mathrm{e}_{\mathrm{g}}{ }^1$ configuration in a metal complex are :
strong field ligand, low spin complex
strong field ligand, high spin complex
weak field ligand, high spin complex
weak field ligand, low spin complex
Explanation
For $3 d^4$
If ligand is SFL : $\mathrm{t}_{2 \mathrm{~g}}{ }^4 \mathrm{e}_{\mathrm{g}}{ }^0 \quad$ (Low spin)
If ligand is WFL : $\mathrm{t}_{2 \mathrm{~g}}{ }^3 \mathrm{e}_{\mathrm{g}}{ }^1$ (High spin)
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