1. In the structure provided choose the option YES or NO to indicate if the carbon atoms are chiral. H 2. Assign the absolute configuration of the asymmetric/chiral centers in the provided structures a, b and c. a. a. C-H HO-CH3 b. C. f jou d. 3. For the following two structures compared in parts A and B, determine whether they are enantiomers OR diastereomers OR the same structure drawn differently (non-bonding electrons not included for clarity). Br Br Br OH b. Br NH₂ CH3 I HOH H-C O Br Be OH Br Br Br OH

Identify the chiral centers (mark with *) of the molecule below and assign the absolute configuration of the chiral centers.

Which of the following statements is/are correct? Br Br Br Br CI 'P' 'R' 'S' .D. A. P and Q are non-superimposable mirror images of each other. B. R and S are non-superimposable images of each other. C. Q and R are same compound. D. Q and S are enantiomers. E. statements A and B are correct.

2. Mark any chirality centers (asymmetric carbons) with a *. How many stereoisomers are possible? Br

3. State whether the pairs of molecules are enantiomers, diastereomers, identical, or different compounds a. b. c. H3C. H F. H H CH3 ного/. H *** Et ļ. H CH₂F CO₂H Me

4. For each pair of molecules, assign the configuration at each chiral center as R or S. Give the relationship between the pair of molecules as no relation, constitutional isomers, same molecule but not meso, same molecule and meso, enantiomers, or diastereomers. There should only be one possible answer. a. OH OH b. Br Br с. NH2 NH2 NH2 NH2 d. HO НО

Question 21

What is the configuration of the chiral center in the structure below? R OS