Question

5. For the following set of Fischer projections answer each of the questions below by circling the appropriate letter(s) or letter combination(s). Hint: Redraw the Fischer projections with the longest carbon chain in the vertical direction and having similar atoms in the top and bottom portion. Classify all chiral centers in the first structure as R or S absolute configuration. (X pts) a. Which are optically active? b. Which are meso? c. Which is not an isomer with the others? d. Which pairs are enantiomers? e. Which pairs are identical? f. Which pairs are diastereomers? E. Which pairs, when mixed in equal amounts AB AC AD AE BC BD BE CD CE DE AB AC AD AE BC BD BE CD CE DE AB AC AD AE BC BD BE CD CE DE AB AC AD AE BC BD BE CD CE DE will not rotate plane polarized light? h. Draw any stereoisomers, which are not shown above, as Fischer projections. If there are none, indicate this i. In the most recent Organic Leters, 2018, 20, 28-31, three new sulfur compounds were isolated from welsh onion plant grown in Kyoto, Japan (only Kujounin Aj is shown). Circle all of the chiral centers. How many stereoisomers are possible? Show work Kujounin Ai has anti-cancer activity. Hy

Answer 1