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Chemistry Question on Isomerism in Coordination Compounds

The complex cation which has two isomers is :

A

[Co(H2O)6]3+\left[ Co \left( H _2 O \right)_6\right]^{3+}

B

[Co(NH3)5Cl]+\left[ Co \left( NH _3\right)_5 Cl \right]^{+}

C

[Co(NH3)5NO2]2+\left[ Co \left( NH _3\right)_5 NO _2\right]^{2+}

D

[Co(NH3)5Cl]2+\left[ Co \left( NH _3\right)_5 Cl \right]^{2+}

Answer

[Co(NH3)5NO2]2+\left[ Co \left( NH _3\right)_5 NO _2\right]^{2+}

Explanation

Solution

[CoNH3​)5​NO2​]2+
Two linkage isomers possible
NO2​→ Ambidentate ligand