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MHT CET Medical202626 April 2026Morning ShiftChemistryCoordination CompoundsActual

What is coordination number of central metal ion in cisplatin ?

Options

  1. A2
  2. B4
  3. C6
  4. D8

Correct answer

B. 4

Step-by-step solution

Cisplatin is cis-diamminedichloridoplatinum(II), with the chemical formula [Pt(NH₃)₂Cl₂] . The central metal ion is Pt²⁺ , which is coordinated to two ammonia ( NH₃ ) ligands and two chloride ( Cl^- ) ligands. Since both NH₃ and Cl^- are monodentate ligands, the total number of coordinate bonds formed with the central metal ion is 2 + 2 = 4 . Thus, the coordination number of the central metal ion in cisplatin is 4 . Answer: 4

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