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Determining Stereochemical Relationships


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Three-Dimensional Representations: Haworth Projection Examples


Consider the following molecules and determine whether the remaining groups are above or below the ring and whether the main (non-hydrogen) groups are cis or trans to one another. Click on the link below each molecule to check your answer.



The alcohol is oriented up, so the remaining hydrogen on that carbon must be oriented down. The methyl group is oriented down, so the remaining hydrogen on that carbon must be oriented up. Because the alcohol is oriented up and the methyl group is oriented down, the groups are trans to one another.

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