Question

IUPAC name of $\left[Fe\right(O_2\left)\right(CN{)}_{4}Cl{]}^{4-}$ is :

• A. Chlorotetracyano dioxoferrate (II) ion
• B. Chlorotetracyano peroxoferrate (II) ion
• C. Chlorotetracyano superoxoferrate (II) ion
• D. Tetracyanochloro superoxoferrate (II) ion

Answer 1

Answer: (C)

Chlorotetracyano superoxoferrate (II) ion

The IUPAC name of $\left[Fe\right(O_2\left)\right(CN{)}_{4}Cl{]}^{4-}$ is Chlorotetracyano superoxoferrate (II) ion.
Chlorine and cyanide ligands are written as chloro and tetrracyano. The prefix tetra indicates four. The ligand $O_2$ is named as superoxo.The iron metal is named ferrate (II) ion as it is a part of anionic complex ion. The oxidation state of iron is written in roman numerals inside parenthesis.