Chemistry - Coordination Chemistry Question with Solution | TestHub

Question Explanation: For unknown octahedral complex ${\mathrm{Fe}}^{+3}$ value of C.F.S.E is, $\mathrm{x}{\Delta }_0$ and magnetic moment is $\sqrt{35}$ B.M. col. X.

Concept: Based on C.F.T.

Solution:

$\mu =\sqrt{35}\Rightarrow \mathrm{n}=5$ (no. of unpaired ${\mathrm{e}}^{-}$)

${\mathrm{Fe}}^{3+}$ in octahedral field (for $\mathrm{n}=5$):

C.F.S.E. $=-0.4{\Delta }_0{\mathrm{n}}_{{\mathrm{t}}_{2\mathrm{g}}}+0.6{\Delta }_0{\mathrm{n}}_{{\mathrm{e}}_{\mathrm{g}}}+\mathrm{mp}$

$=-0.4{\Delta }_0\times 3+0.6{\Delta }_0\times 2+0$

$=0$

Final Answer: (0.00)