Cis-diamminedichloroplatinum (II) or “cisplatin” is a square planar complex with the formula [Pt(NH3)2Cl2]. Cisplatin is an anticancer drug that works by bonding to two adjacent guanine bases on the same strand of DNA, creating a kink which disrupts DNA replication. Each bond to a guanine base is formed by displacing one Cl ligand on cisplatin. The closely related complex trans-diamminedichloroplatinum (II) is completely ineffective as an anticancer agent. Explain why

Chemistry & Chemical Reactivity
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Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
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Chapter22: The Chemistry Of The Transistion Elements
Section: Chapter Questions
Problem 72GQ: The square-planar complex Pt(en)Cl2 has chloride ligands in a cis configuration. No trans isomer is...
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Cis-diamminedichloroplatinum (II) or “cisplatin” is a square planar complex with the formula [Pt(NH3)2Cl2]. Cisplatin is an anticancer drug that works by bonding to two adjacent guanine bases on the same strand of DNA, creating a kink which disrupts DNA replication. Each bond to a guanine base is formed by displacing one Cl ligand on cisplatin. The closely related complex trans-diamminedichloroplatinum (II) is completely ineffective as an anticancer agent. Explain why.

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