Question

Select the correct I.U.P.A.C name for $F{e}_4\left[Fe\right(CN{)}_6{]}_3$ :

• A. Iron $\left(III\right)$ hexacyanidoferrate $\left(III\right)$
• B. Iron $\left(III\right)$ hexacyanidoferrate $\left(II\right)$
• C. Iron $\left(III\right)$ hexacyanidoiron $\left(III\right)$
• D. Iron $\left(II\right)$ hexacyanidoiron $\left(II\right)$

Answer 1

Answer: (B)

In the complex, iron outside the sphere is in +3 oxidation state while iron within the coordination sphere is in -2 oxidation state so named ferrate and oxidation states are written in roman letters within the brackets.

Option (A) is correct. The correct I.U.P.A.C name for $F{e}_4\left[Fe\right(CN{)}_6{]}_3$ is iron $\left(III\right)$ hexacyanidoferrate $\left(II\right)$