HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryCoordination compoundsAchiever Section

Which of the following has an optical isomer ?

A.[Co(NH₃)₃Cl]+

B.[Co(en)(NH₃)₂]2+

C.[Co(H₂O)₄(en)]3+

D.[Co(en)₂(NH₃)₂]3+✓ Correct

Explanation

It is an octahedral complexes of the type where the ligand AA is bidendate. The compound is optical isomers, the cis form of is red in color and the trans form of is green in color. Hence, the correct answer is option (d)

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