Question

Identify the ligands present in cisplatin.

• A. $\text{Cl}^-$ and $\text{CN}^-$
• B. $\text{NH}_3$ and $\text{Cl}^-$
• C. $\text{NH}_3$ and $\text{H}_2\text{O}$
• D. $\text{Cl}^-$ and $\text{H}_2\text{O}$

Hint:

Cisplatin = cis-diamminedichloroplatinum(II). The name itself tells you the ligands: ammine ($\text{NH}_3$) and dichloro ($\text{Cl}^-$).

Answer 1

The Correct Option is B

Step 1: Concept
Cisplatin is a well-known chemotherapy drug used to treat various types of cancers. It is a coordination compound of platinum.

Step 2: Meaning
Ligands are ions or molecules that bind to a central metal atom to form a coordination complex.

Step 3: Analysis
The chemical formula for cisplatin is $cis-[\text{Pt}(\text{NH}_3)_2\text{Cl}_2]$. It contains two ammonia molecules and two chloride ions acting as ligands in a square planar geometry, with like ligands on the same side.

Step 4: Conclusion
The ligands are ammonia ($\text{NH}_3$) and chloride ($\text{Cl}^-$). Final Answer: (B)