week 2 - unfinished lecture questions

week 2 - unfinished lecture questions - Chemistry S-20ab...

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Roald Hoffmann (who shared the Nobel Prize for frontier molecular orbitals) wrote a wonderful book about chemistry titled The Same and Not The Same . His point was that much of chemistry involves substances that are the same in some respects, and not the same in others. Enantiomers are an excellent example: A pair of enantiomers will generally have identical physical properties : - color, boiling point, melting point, solubility, etc. A pair of enantiomers will generally have different biological properties: - taste, smell, toxicity, therapeutic action, etc. A pair of enantiomers can exhibit the same chemical reactivity OR different chemical reactivity , depending on what they are reacting with (more on this later). For instance: O H O H R -carvone spearmint S -carvone caraway ("rye") As an excercise, can you assign the R and S designations to these enantiomers of carvone? Do you remember the rule for multiple bonds? Chemistry S-20ab
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This note was uploaded on 07/21/2010 for the course CHEM S20ab taught by Professor Mccarty during the Summer '10 term at Harvard.

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week 2 - unfinished lecture questions - Chemistry S-20ab...

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