Question

Among the following complex ions, the species containing $Fe ^{3+}$ in strong ligand field is

• A. $\left[ FeF _{6}\right]^{3-}$
• B. $\left[ Fe \left( NH _{3}\right)_{6}\right]^{3+}$
• C. $\left[ Fe ( CN )_{6}\right]^{3-}$
• D. $\left[ Fe \left( H _{2} O \right)_{6}\right]^{3+}$

Answer 1

Answer: (C)

$CN ^{-}$is a stronger ligand according to spectrochemical series.