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Chemistry Question on Isomerism in Coordination Compounds

Which of the following has an optical isomer ?

A

[Co(NH3)3Cl]+\left[Co\left(NH_{3}\right)_{3}Cl\right]^{+}

B

[Co(en)(NH3)2]2+\left[Co\left(en\right)\left(NH_{3}\right)_{2}\right]^{2+}

C

[Co(H2O)4(en)]3+\left[Co\left(H_{2}O\right)_{4}\left(en\right)\right]^{3+}

D

[Co(en)2(NH3)2]3+\left[Co\left(en\right)_{2}\left(NH_{3}\right)_{2}\right]^{3+}

Answer

[Co(en)2(NH3)2]3+\left[Co\left(en\right)_{2}\left(NH_{3}\right)_{2}\right]^{3+}

Explanation

Solution

It is an octahedral complex of the type [M(AA)2 X2]\left[M\left(AA\right)_{2}\,X_{2}\right] Where AA is bidentate ligand.