R and S Configuration Video Lessons

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Concept:

Problem: Click on all structures that are identical to the first (leftmost). If no structure qualifies, submit your answer without selecting any structure.

FREE Expert Solution

 To determine the R/S configuration of the chiral center:

• If the lowest priority is on a dashed line: trace a path from 1 to 3

– If the order is clockwise → R (rectus or right)

– If the order is counterclockwise → S (sinister or left)


• If the lowest priority is not on a dashed line: swap with the group on a dashed line

– Trace a path from 1 to 3:

– Clockwise → R becomes S because of the swap

– Counterclockwise → S becomes R because of the swap


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Problem Details

Click on all structures that are identical to the first (leftmost). If no structure qualifies, submit your answer without selecting any structure.

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