Question

The correct IUPAC name of the coordination compound K₃[Fe(CN)₅NO] is:

• A. Potassium pentacyanonitrosylferrate (II)
• B. Potassium pentacyanonitro-N-ferrate (III)
• C. Potassium nitritopentacyanoiron (IV)
• D. Potassium nitritopentacyanoiron (II)

Hint:

When naming coordination compounds, pay attention to the ligands, the central metal, and its oxidation state.

Answer 1

The Correct Option is B

The IUPAC name for this coordination compound follows the naming convention where the ligand is named first, followed by the metal ion and its oxidation state. - The complex has five cyanide (\(CN^-\)) ligands and one nitrosyl (\(NO\)) ligand. The nitrosyl group is attached to the iron as \(NO\) and not as \(NO_2\), and it is named as nitrosyl. - The oxidation state of iron in this complex is +3. Therefore, the IUPAC name is Potassium pentacyanonitro-N-ferrate (III). Thus, the correct answer is Option (B).