Question

The $IUPAC$ name of the compound $K\left[SbC{l}_{5}Ph\right]$ is

• A. Potassium chlorophenylantimonate(V)
• B. Potassium pentachloro(phenyl) antimonate(V)
• C. Potassium phenylpentachloroantimonate(V)
• D. None of the above

Answer 1

The correct option is B Potassium pentachloro(phenyl) antimonate(V)

IUPAC naming of coordination compound:

The names of coordination compounds are derived by the following principles of nomenclature,
1. The cation is named first in both positively and negatively charged coordination entities.
2. The ligands are named in an alphabetical order before the name of the central atom/ion.
3. When coordination entity is anionic, the name of central metal atom end with 'ate' followed by its oxidation number in roman numericals.

In given compound, the charge on coordination entity is -1.
$C{l}^{-}$ and phenyl are monodentate anionic ligand.
Thus, the oxidation state of $Sb$ is +5.
Hence, the $IUPAC$ name of the compound $K\left[SbC{l}_{5}Ph\right]$ is Potassium pentachloro(phenyl)antimonate$\left(V\right)$