The correct IUPAC name of $\left[\mathrm{PtBr}_{2}\left(\mathrm{PMe}_{3}\right)_{2}\right]$ is:

(C) dibromobis(trimethylphosphine)platinum(II)

(A) bis(trimethylphosphine)dibromoplatinum(II)

(B) bis[bromo(trimethylphosphine)]platinum(II)

(D) dibromodi(trimethylphosphine)platinum(II)

JEE Main · 2024 · 06 Apr 2024 · Shift 2 · Coordination Compounds

The correct IUPAC name of

[PtBr_{2} (PMe_{3})_{2}]

is:

(A)bis(trimethylphosphine)dibromoplatinum(II)
(B)bis[bromo(trimethylphosphine)]platinum(II)
(C)dibromobis(trimethylphosphine)platinum(II)✓ Correct
(D)dibromodi(trimethylphosphine)platinum(II)

Answer: (C)

Solution

Ligands are cited alphabetically; because "trimethylphosphine" already carries its own multiplying prefix (tri-), the enclosing multiplier for two such ligands is "bis", while two bromo ligands take the simple prefix "di". Alphabetically bromo precedes phosphine, giving dibromobis(trimethylphosphine)platinum(II).

JEE Main · 2024 · 06 Apr 2024 · Shift 2 · Single correct option

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