Question

what is the IUPAC name of fe4(fe(cn)6)3

Answer 1

Iron(III) hexacyanido ferrate 

Answer 2

Answer : The IUPAC name of $Fe_4[Fe(CN)_6)]_3$ is, Iron(III)hexacyanoferrate(II)

Explanation :

Rules for naming of the coordination compounds :

• The ligand named first then metal.
• The charge of metal indicated with the Roman numerals and enclosed in the parenthesis after metal name.
• The ligands are named in alphabetical order before the metal ion.
• Ligands that include a numerical prefix in the name use the prefixes bis for 2, tris for 3, or tetrakis for 4 to indicate their number.
• If the complex ion is an anion, we drop the ending of the metal name and add –ate.

In the given coordination compound, Fe is the iron metal, CN is the ligand named as cyano. The oxidation state of iron which are present outside the bracket is, (+3) and the oxidation state of iron which are present inside the bracket is, (+2).

Hence, the IUPAC name of $Fe_4[Fe(CN)_6)]_3$ is, Iron(III)hexacyanoferrate(II)