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diastereomers

On Cats, Part 6: Stereocenters

Let’s recap what we’ve talked about so far. Sawhorse cat and Freaky Sawhorse cat are constitutional isocats. But Freaky Sawhorse Cat has a mirror image of

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The Single Swap Rule

I don’t think there are that many “tricks” to doing well in organic chemistry, but there are a few. I was kind of surprised last

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The Meso Trap

Question: Are these molecules enantiomers, diastereomers, or the same? If you immediately recognized this as a molecule with an internal plane of symmetry (and thus

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Ephedrine and Pseudoephedrine

These molecules make the news quite a bit. Some questions to think about: What’s the (R),(S) designation for the stereocenters of ephedrine and pseudoephedrine, as

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