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Coordination Compounds

Question
CBSEENCH12011299
Wired Faculty App

which of the following does not show optical isomerism?  (en = ethylenediamine)

  • [Co(en)2Cl2]+

  • [Co(NH3)3Cl3]0

  • [Co(en)Cl2(NH3)2]+

  • [Co(en)3]3+

Solution

B.

[Co(NH3)3Cl3]0

optical isomerism is exhibited by only those complexes in which elements of symmetry are absent. Octahedral complexes of the types [M(aa)3], [M(aa)x2,y2] and [M(aa)2x2] have an absence of elements of symmetry, thus exhibit optical isomerism. Here, aa represents bidentate ligand, x or y represent monodentate ligand and M represent central metal ion.
Hence, [Co(NH3)3Cl3]o due to the presence of symmetry elements does not exhibit optical isomerism.

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