Among the following complexes,the one which s | vedclass

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(B) $H_2O$ is a weak field ligand,hence $\Delta_o < $ pairing energy.
$CFSE = (-0.4x + 0.6y) \Delta_o$
where $x$ and $y$ are the number of electr

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$[Fe(H_2O)_6]^{3+}$

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(B) $H_2O$ is a weak field ligand,hence $\Delta_o < $ pairing energy.
$CFSE = (-0.4x + 0.6y) \Delta_o$
where $x$ and $y$ are the number of electrons occupying $t_{2g}$ and $e_g$ orbitals respectively.
For $[Fe(H_2O)_6]^{3+}$ complex ion:
$Fe^{3+}$ is a $3d^5$ system. In a weak field,the configuration is $t_{2g}^3 e_g^2$.
$CFSE = (-0.4 	imes 3) + (0.6 	imes 2) = -1.2 + 1.2 = 0 \Delta_o$.

Among the following complexes,the one which shows zero crystal field stabilization energy $(CFSE)$ is

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