What are the Chiral centers' absolute configurations (R or S) for the following molecule. Hint (Number 2 is next to CO2H) O A A. 2S, 3R B. 2R, 3R C. 2S, 3S D.2R, 3S E. One of carbons is not chiral OB HO₂C H F OC OD Ο Ε H H3C CH₂CH3 Il Proctorio is sharing your screen. Stop sharing Hide

5

! ( ans 4 with explanation )

NOTE: I is r, II is R (First option) is the incorrect answer

4. For each of the following structures:a. Identify Chiral Centersb. Identify the chiral carbon configuration as R or Sc. Identify internal symmetry centers if they existd. Identify whether the structure is chiral or achirale. Identify mesostructures from existing

Specify the configurations (R or S) at ALL chiral centers in the molecules below. Please note that some molecules below may have more than 1 chiral centers, and you are responsible to find all the chiral centers.

1. Determine R or S configuration for each chiral center in the following two molecules O O O Ο Ο O ACO H O

CH3 CH3 CH3 CH3 CH3 H Br H Br H Br- H H. H. H 'H. H3C CH3 ČH3 Br 2-bromobutane a b The wedge-dash representation of 2-bromobutane is shown. What is the orientation of the chiral center(s)? Write the orientation as in the following examples, (2S) or (2R,3S), not 2s or 2R,3S. Be sure to include the parentheses and the number, and comma as necessary. Which of the Newman structures is equivalent to the wedge-dash structure? Note that the equivalent Newman structure will not necessarily have the same conformation as the wedge-dash structure.

How many asymmetric centers are in the molecule on the right?

which pair is (2R,3S) and (2S, 3R) and which pair is the (2S, 3S) and (2R, 3R)? please point to the stereocenters to answer Ph S Br LOH S Br A. Br Ph S R Br C. OH C 0 Ph R Br Br OH R B. Ph fo Br OH ི་ R Br S D. S