Dolbier HW Solutions 621

Dolbier HW Solutions 621 - 715 CARBOHYDRATES 25.21 Begin...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
25.21 Begin the problem by converting the Fischer projection of D -ribose to a perspective view. Remem- ber that the horizontal lines of a Fischer projection represent bonds coming toward you, and the ver- tical lines are going away from you. Rank the groups attached to each stereogenic center. Identify each stereogenic center as either R or S according to the methods described in Chapter 7. Remember that the proper orientation of the low- est ranked group (usually H) is away from you. Molecular models will be helpful here. Each of the stereogenic centers in D -ribose has the R con f guration. The IUPAC name of D -ribose is (2 R ,3 R ,4 R )- 2,3,4,5-tetrahydroxypentanal. 25.22 ( a ) The L sugars have the hydroxyl group to the left at the highest numbered stereogenic center in
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online