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Home Questions CWTZN97W2J
Target Exam

CUET

Subject

Chemistry

Chapter

Inorganic: Coordination Compounds

Question:

Which complex ion has cis and trans isomer?

Options:

[PdCl3NH3]-

[Pd(CN)5NH3]-

[PtCl2(CN)2]2-

[Pt(C2O4)2]2-

Correct Answer:

[PtCl2(CN)2]2-

Explanation:

The correct answer is option 3. \([PtCl_2(CN)_2]^{2-}\).

The complex ion that can exhibit cis and trans isomers is \([PtCl_2(CN)_2]^{2-}\).

In this complex, there are two chloride ions \((Cl^-)\) and two cyanide ions \((CN^-)\) as ligands. The two chloride ions can either be adjacent to each other (cis configuration) or on opposite sides of the central platinum ion (trans configuration). Similarly, the two cyanide ions can also adopt cis or trans configurations with respect to each other.

So, the complex \([PtCl_2(CN)_2]^{2-}\) can have both cis and trans isomers.

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