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The cisplatin example in class discussed the difference between cis-diamine-dichloro-platinum(II) and trans-diamine-dichloro-platinum(II). The cisplatin has two cl's on the left of the central atom (Pt) and two NH3's on the right of the central atom. The Transplatin (not exactly sure if that is how you say it) had the Cl's diagonal from one another and the NH3's also diagonal from one another. Cisplatin is used as a chemotherapy drug to stop cell division. Its shape is able to help it do this because the two Cl's on the same side can attach to DNA and inhibit it from replicating. The Transplatin can not do this because its Cl's are on opposite sides.
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