MCQ
In which of the following complexes the CFSE, $\Delta_0$ will be equal to zero?
- A$\left[ Fe \left( NH _3\right)_6\right] Br _2$
- B$\left[ Fe ( en )_3\right] Cl _3$
- C$K _4\left[ Fe ( CN )_6\right]$
- ✓$K _3\left[ Fe ( SCN )_6\right]$
✓
Answer
Correct option: D.
$K _3\left[ Fe ( SCN )_6\right]$
(D) $K _3\left[ Fe ( SCN )_6\right]$
Sol. For complex $K _3\left[ Fe ( SCN )_6\right]$
Calculation of CFSE
$
\begin{array}{l}
=(-0.4 \times 3+0.6 \times 2) \Delta_0 \\
=0 \Delta_0
\end{array}
$
Sol. For complex $K _3\left[ Fe ( SCN )_6\right]$
Calculation of CFSE
$
\begin{array}{l}
=(-0.4 \times 3+0.6 \times 2) \Delta_0 \\
=0 \Delta_0
\end{array}
$
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