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Chemistry Question on Isomerism in Coordination Compounds

Which of the following compound would exhibit co-ordination isomerism?

A

[Cr(en)2] NO2[Cr{{(en)}_{2}}]\,N{{O}_{2}}

B

[Cr(H2O)6] Cl3[Cr{{({{H}_{2}}O)}_{6}}]\,C{{l}_{3}}

C

[Cr(NH3)6]  [Co(CN)6][Cr{{(N{{H}_{3}})}_{6}}]\,\,[Co{{(CN)}_{6}}]

D

None of the above

Answer

[Cr(NH3)6]  [Co(CN)6][Cr{{(N{{H}_{3}})}_{6}}]\,\,[Co{{(CN)}_{6}}]

Explanation

Solution

The isomerism, in which there is an exchange between groups of co-ordination sphere of one complex ion and group of co-ordination sphere of other ion, is called co-ordination isomerism. [Cr(NH3)6]  [Co(CN)6][Cr{{(N{{H}_{3}})}_{6}}]\,\,[Co{{(CN)}_{6}}] and [Co(NH3)6]  [Cr(CN)6][Co{{(N{{H}_{3}})}_{6}}]\,\,[Cr{{(CN)}_{6}}]