The IUPAC name of $\mathrm{K}_{3}[\mathrm{Co}(\mathrm{C}_{2}\mathrm{O}_{4})_{3}]$ is :-

(A) Potassium trioxalatocobaltate(III)

(B) Potassium tris(oxalato)cobalt(III)

(C) Potassium tris(oxalato)cobaltate(III)

(D) Potassium trioxalatocobalt(III)

JEE Main · 2023 · 06 Apr 2023 · Shift 2 · Coordination Compounds

The IUPAC name of

K_{3} [Co (C_{2} O_{4})_{3}]

is :-

(A)Potassium trioxalatocobaltate(III)✓ Correct
(B)Potassium tris(oxalato)cobalt(III)
(C)Potassium tris(oxalato)cobaltate(III)
(D)Potassium trioxalatocobalt(III)

Answer: (A)

Solution

In IUPAC nomenclature of coordination compounds, when three identical bidentate ligands are present, the prefix 'tri' is used directly with the ligand name. Since the complex is anionic, the metal name ends with '-ate'. The oxidation state of Co is +3. Therefore, the correct name is Potassium trioxalatocobaltate(III).

JEE Main · 2023 · 06 Apr 2023 · Shift 2 · Single correct option

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