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NEET CHEMISTRYCoordination CompoundsMedium

Question

Number of isomers of [Pt(NH3)4][CuCl4][Pt(NH_3)_4][CuCl_4] complex are:

A

2

B

3

C

4

D

5

Step-by-Step Solution

The given complex [Pt(NH3)4][CuCl4][Pt(NH_3)_4][CuCl_4] consists of a complex cation and a complex anion. Such complexes exhibit coordination isomerism, which arises due to the interchange of ligands between the cationic and anionic entities of the different metal ions. The possible coordination isomers (which are ionic in nature) are:

  1. [Pt(NH3)4]2+[CuCl4]2−[Pt(NH_3)_4]^{2+}[CuCl_4]^{2-}
  2. [Pt(NH3)3Cl]+[Cu(NH3)Cl3]−[Pt(NH_3)_3Cl]^{+}[Cu(NH_3)Cl_3]^{-}
  3. [Cu(NH3)4]2+[PtCl4]2−[Cu(NH_3)_4]^{2+}[PtCl_4]^{2-}
  4. [Cu(NH3)3Cl]+[Pt(NH3)Cl3]−[Cu(NH_3)_3Cl]^{+}[Pt(NH_3)Cl_3]^{-}

Note: The combination where two ligands are exchanged, i.e., [Pt(NH3)2Cl2][Pt(NH_3)_2Cl_2] and [Cu(NH3)2Cl2][Cu(NH_3)_2Cl_2], results in neutral molecules rather than a complex salt, and is therefore not counted as a coordination isomer of the given salt. Thus, there are 4 isomers.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Coordination Compounds. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYCoordination Compoundsnumberisomersptnhcuclcomplex

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The complex, $[\text{Pt}(\text{Py})(\text{NH}_3)\text{BrCl}]$ will have how many geometrical isomers?

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