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MHT CET202519 Apr 2025Morning ShiftChemistryCoordination CompoundsActual

Which from following coordinate complexes contains the ligand en ?

Options

  1. ATetraamminecopper (II) ion
  2. BBis(ethylenediamine)dithiocyanatoplatinum (IV)
  3. CPentacarbonyliron (o)
  4. DTetracyanonickelate (II)

Correct answer

B. Bis(ethylenediamine)dithiocyanatoplatinum (IV)

Step-by-step solution

The ligand 'en' denotes ethylenediamine ( NH₂ CH₂ CH₂ NH₂ ) . Analyzing the complexes: Tetraamminecopper(II) ion contains only ammine ligands [ Cu(NH₃)₄ ]²⁺ . Bis(ethylenediamine)dithiocyanatoplatinum(IV) explicitly contains two ethylenediamine ligands [ Pt(en)₂(SCN)₂ ]²⁺ . Pentacarbonyliron(0) features carbonyl ligands [ Fe(CO)₅ ] . Tetracyanonickelate(II) consists of cyano ligands [ Ni(CN)₄ ]²⁻ . Only the bis(ethylenediamine) complex contains the 'en' ligand. Final answer: B

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