Lecture-7-Chirality.pdf - CHEM 8A Lectures 6 7 CHIRALITY...

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CHEM 8A Lectures 6 & 7 CHIRALITY Stereoisomers or not? If so, what kind? **Assign R/S configurations for each stereocenter in the following compounds** OH OH OH HO HO OH OH OH OH OH HO OH A B C D E F Here’s a trick: the normal way of assigning R/S requires the 4 th priority to be behind the page. If the 4 th priority is drawn in front of the page with a wedge, the configuration you assign is the opposite of how it looks. For example, if it looks like an R center with the 4 th priority wedged, it is actually an S configuration. Indicate whether the following pairs are enantiomers, diastereomers, constitutional isomers, the same compound, or not isomers. You’ve already done the hard part by assigning R/S. For a given pair below, number the carbons, name the compounds, and write the formula. o Constitutional isomers – same molecular formula, and the name differs by more than the R/S designation. o Not isomers – different molecular formula.
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