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Cisplatin is an anti-cancer drug - AQA - A-Level Chemistry - Question 15 - 2017 - Paper 3
Question 15
Cisplatin is an anti-cancer drug. Which structure represents a stereoisomer of cisplatin? A H gN—Pt—Cl Cl NH g B H gN—Pt—Cl NH g Cl C NH g Pt C... show full transcript
Worked Solution & Example Answer:Cisplatin is an anti-cancer drug - AQA - A-Level Chemistry - Question 15 - 2017 - Paper 3
Step 1
Which structure represents a stereoisomer of cisplatin?
Answer
To identify the stereoisomer of cisplatin, we analyze the structures given in options A, B, C, and D.
Cisplatin has a specific square planar geometry and typically features two chloride (Cl) ligands and two amine (NH a) ligands in a cis arrangement. A stereoisomer will have the same molecular formula but a different spatial arrangement.
- Option A: Contains two amines and two chlorides but has an incorrect arrangement.
- Option B: This option shows the two NH a groups on adjacent sides, maintaining the cis configuration.
- Option C: Represents a trans orientation which is not a stereoisomer.
- Option D: Again does not match the cis geometry required for stereoisomerism.
Thus, the correct structure that represents a stereoisomer of cisplatin is Option B.