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Coordination Compounds — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds1 Mark
MCQ
The neutral complex, diamine dibromo dichloro platinum $(IV)$ is best represented as:
  • ✓
    $ {\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Br}_2 \mathrm{Cl}_2\right]} $
  • B
    $ {\left[\mathrm{PtCl}_2 \mathrm{Br}_2\left(\mathrm{NH}_3\right)_2\right]} $
  • C
    $ {\left[\mathrm{PtBr}_2 \mathrm{Cl}_2\left(\mathrm{NH}_3\right)_2\right]} $
  • D
    $ {\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2 \mathrm{Br}_2\right]}$
✓

Answer

Correct option: A.
$ {\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Br}_2 \mathrm{Cl}_2\right]} $
In a complex compound, the neutral ligand is written first followed by an anionic ligand. But if there are more than one anionic ligand then their name is written in alphabetical order thus bromo is written first then chloro.

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