COMEDK2021ChemistryCoordination Compounds
The correct IUPAC name of the coordination compound K ₃[ Fe ( CN )₅ NO ₂] is
Options
- Apotassium pentacyanonitrosylferrate (II)
- Bpotassium pentacyanonitro-N-ferrate (III)
- Cpotassium nitritopentacyanoferrate (IV)
- Dpotassium nitritopentacyanoiron (II)
Correct answer
B. potassium pentacyanonitro-N-ferrate (III)
Step-by-step solution
Complex anion: [Fe(CN)₅NO₂]³⁻ . Let x be the oxidation state of Fe. x + 5(-1) + 1(-1) = -3 x = +3 Naming the ligands: 5 CN^- ligands pentacyano; 1 NO₂^- ligand coordinating through N nitro-N (alphabetically, cyano comes before nitro). Since the complex ion is an anion, Fe takes the suffix "-ate" ferrate(III). IUPAC name: potassium pentacyanonitro-N-ferrate(III)