Question

Select the IUPAC name for $F{e_4}{[Fe{(CN)_6}]_3}$
A. $Iron(III)hexacyanido\,ferrate(II)$
B. $Iron(III)hexacyanido\,ferrate(III)$
C. $Iron(III)hexacyanidoironferrate(III)$
D. $Iron(II)hexacyanidoiron\,ferrate(II)$

Answer 1

Hint: We are discussing here about coordination compound .Coordination compounds are molecules that possess one or multiple metal centres that are bound to ligands (atoms, ions, or molecules that donate electrons to the metal).
And also learn about the IUPAC nomenclature of coordination compounds.

Complete step by step answer:
Coordination compounds are molecules that possess one or multiple metal centres that are bound to ligands.
These complexes can be neutral or charged. When the complex is charged, it is stabilized by neighbouring counter-ions.
The molecules or ions surrounding the central metal ion are called ligands.
Rules for naming of the coordination compounds:
Cations are written first , then ligands are listed in alphabetical order , then metal ions are written .
Negative ligands ending with ide , remove the last e and add o , so it becomes ido .
When a ligand is simple , we use di , tri , penta to specify their number but when the ligand is complex then for 2 we write bis , for 3 tris , for 4 tetrakis and so on .
Oxidation number of the central atom is indicated by roman numerals after the name of the metal .
If complex ion is a cation , the metal is named the same as the element but if complex ion is an anion , the name of the metal ends with ate .
We don't write the number of atoms or molecules which are present outside the coordination sphere .
In the given coordination compound, Fe is the iron metal, CN is the ligand named as cyano. Iron exists in two different oxidation states in this compound , that is +2 and +3 . So , the iron which is inside the coordination sphere is named as ferrate .
So , the IUPAC name of $F{e_4}[Fe{(CN)_6}]$ is $Iron(III)hexacyanido\,ferrate(II)$
So, Option (A) is Correct.

Note: Nomenclature rules of coordinate compounds are different from organic compounds. So we should be very careful while naming the compounds . We should not get confused between the two.