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  4. The crystal Field stabilization Energy (CFSE) of [ CoF 3( H 2 O )3](Δ0< P ) is :-

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Q. The crystal Field stabilization Energy $(CFSE)$ of $\left[ CoF _{3}\left( H _{2} O \right)_{3}\right]\left(\Delta_{0}< P \right)$ is :-

JEE MainJEE Main 2020Coordination Compounds

Solution:

$\left[ CoF _{3}\left( H _{2} O \right)_{3}\right] \,\,\,\, \Delta_{0}< P$

Means all ligands behaves as weak field ligands

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$=[-0.4 \times 4+0.6 \times 2] \Delta_{0}$

$=[-1.6+1.2] \Delta_{0}$

$=\left[-0.4 \Delta_{0}\right]$