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Coordination Compounds — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds1 Mark
MCQ
Complex species that exhibits isomerism is:
  • A
    $ {\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}} $
  • ✓
    $ {\left[\mathrm{Co}\left(\mathrm{NO}_2\right)\left(\mathrm{NH}_3\right)_5\right]^{2+}} $
  • C
    $ {\left[\mathrm{PtCl}_2(\mathrm{en})\right]} $
  • D
    $ {\left[\mathrm{CoCl}\left(\mathrm{NH}_3\right)_5\right]^{2+}} $
✓

Answer

Correct option: B.
$ {\left[\mathrm{Co}\left(\mathrm{NO}_2\right)\left(\mathrm{NH}_3\right)_5\right]^{2+}} $
None of the given complexes can exhibit either geometrical or optical isomerism. But the complex ${\left[\mathrm{Co}\left(\mathrm{NO}_2\right)\left(\mathrm{NH}_3\right)_5\right]^{2+}} $
shows linkage isomerism as it contains nitro group which is ambidentate ligand and can be attached through either $N$ atom or $O$ atom.

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