SC8. Biological Building Blocks: Carbohydrates
- Page ID
- 4133
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SC8. Biological Building Blocks: Carbohydrates
- The naturally-occurring carbohydrates are chiral.
- Glyceraldehyde is the grandmother of carbohydrates.
| | Wire Frame Ball & Stick Spacefilling |
| | Wire Frame Ball & Stick Spacefilling |
- The "last" chiral center in other carbohydrates all have the same configuration as the chiral center in glyceraldehyde.
- Fischer projections are drawings that are sometimes used to show stereochemistry in a different way.
- The groups to left and right of the Fischer projection are coming towards you.
- The groups on top and bottom are going away from you.
- The carbon chain is drawn vertically with attachments at the sides.
- Normally, the chain is oriented so that the "highest priority functional group" on the chain is at or near the top of the chain; that usually means the group with the most bonds to oxygen. In glyceraldehyde, the CH=O group is drawn at the top rather than at the bottom.
Problem SC8.1.
What is the absolute configuration of L-glyceraldehyde? What about D-glyceraldehyde?
Problem SC8.2.
Draw the following molecules as Fischer projections.
Problem SC8.3.
Convert the following Fischer projections into wedge-dash drawings.
