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Chemistry Question on Coordination chemistry

Which of the following complex is homoleptic?

A

[Ni(CN)4]2−[ \text{Ni(CN)}_4 ]^{2-}

B

[Ni(NH3)2Cl2][ \text{Ni(NH}_3)_2\text{Cl}_2 ]

C

[Fe(NH3)4Cl2]+[ \text{Fe(NH}_3)_4\text{Cl}_2 ]^{+}

D

[Co(NH3)4Cl2]+[ \text{Co(NH}_3)_4\text{Cl}_2 ]^{+}

Answer

[Ni(CN)4]2−[ \text{Ni(CN)}_4 ]^{2-}

Explanation

Solution

A homoleptic complex has all ligands identical. In [Ni(CN)4]2−, all ligands are cyanide ions, making it homoleptic.