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Question

Which of the following complex species is not expected to exhibit optical isomerism?

A
[Co(en)2Cl2]+
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B
[Co(NH3)3Cl3]
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C
[Co (en) (NH3)2Cl2]+
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D
[Co(en)3]3+
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Solution

The correct option is B [Co(NH3)3Cl3]
Optical isomerism is exhibited by only those complexes which lack elements of symmetry.

[Co(NH3)3Cl3] shows facial as well as meridional isomerism. But both the forms contain plane of symmetry.

Thus, this complex does not exhibit optical isomerism.

Hence, option B is correct.

100844_31784_ans.PNG

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