We are asked to identify the stereochemistry configuration of the given Ficher Projection.
We can see that this is a chiral molecule because:
– there is no plane of symmetry present
– there is a chiral center present
Recall that the R/S configuration gives us the absolute stereochemistry of chiral centers. It involves:
Step 1: Determine the priority of groups at the chiral center.
• Priority is determined using atomic mass.
• If the same atom is present, we compare the other atoms it is bonded to.
– Double and triple bonds count twice/thrice.
Step 2: 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)
Alanine is shown below as a Fischer projection. Identify the stereochemistry configuration.
Which Fischer structures below have the same stereochemistry configuration?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the R and S of Fischer Projections concept. You can view video lessons to learn R and S of Fischer Projections. Or if you need more R and S of Fischer Projections practice, you can also practice R and S of Fischer Projections practice problems.
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Based on our data, we think this problem is relevant for Professor Hsu's class at UVA.