Consider CH3-CH(OH)-CH(OH)(Br). a.How many stereogeniccenters are in the molecule? b.How many stereoisomers are there for the compound? c.Draw the Fischer projection for each of the stereoisomer. Label each using I, II, etc. d.Which pairs are enantiomers? Which are diastereomers?
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Consider CH3-CH(OH)-CH(OH)(Br).
a.How many stereogeniccenters are in the molecule?
b.How many stereoisomers are there for the compound?
c.Draw the Fischer projection for each of the stereoisomer. Label each using I, II, etc.
d.Which pairs are enantiomers? Which are diastereomers?
e.Determine the absolute configuration of each chiral center in one pair of diastereomer.
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- III. Consider the compound below. H. F HO- HO -HO- (Atomic number: H-1, C-6, O-8, F-9) a. How many chiral centers are in the molecule? b. How many stereoisomers are there for the compound? c. Draw the Fischer projection for each of the stereoisomer and determine the absolute configuration (R or S). Label each using I, II, etc. d. Which pairs are enantiomers? Which are diastereomers?2. Draw the optical isomers of CH3-CHOH-CHOH-CH3 . INDICATE the absolute configuration of each chiral center. Which are enantiomers? Which are diastereomers? Is there any meso compound present? Identify if yes.1. Draw all possible stereoisomers for the following molecule. Once drawn, assign the configuration at each chiral center as R or S. Give the relationship between each stereoisomer that was drawn as enantiomers, diastereomers, or meso compound. You may build a table to give the relationship between each stereoisomer. ОН NH2
- Considerthe image below. a. Draw the mirror image of structure I and label it as structure II.b. Are I and II chiral?c. What kind of stereocenters do they represent?1. Below is the Fischer projection of a molecule. Is this the (R) or (S) enantiomer? 2. If you swap the positions of the H and the Cl, does this represent the same enantiomer or the opposite one? 3. Having swapped the positions of the H and CI, if you then swap the Cl and methyl group, what happens to the stereochemistry of the chiral center? CH3 H- CI CH,CH34. 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
- ball & stick + labels stereoisomer(s) e. Are the two molecules enantiomers? yes no ball & stick a. How many chiral carbons are there in the molecule on the left? chiral carbon(s) b. What is the total number of stereoisomers in the group that includes the molecule on the left? stereoisomer(s) c. How many chiral carbons are there in the molecule on the right? chiral carbon(s) d. What is the total number of stereoisomers in the group that includes the molecule on the right? + labels Previous Next Save and ExitIX. Assign R, S configurations to each indicated chirality center in the molecules below. HO. HO 16. OH Ye H HO₂C H 14. HO CO₂H OH The configuration of carbon 14 is The configuration of carbon 16 is The configuration of carbon 18 is H CH,NH, H 15. H₂N CH3CH₂ 17. COOH ----CH3 H CH3 The configuration of carbon 15 is The configuration of carbon 17 is 18.1a. How many stereogenic centers are present 1c. Draw a three-dimensional structure of a in the structure below? Indicate them with asterisk(s). How many stereoisomers stereoisomers are possible? chiral compound with the molecular formula of C4H4Cl₂ that does not have a stereogenic carbon. In addition, draw the enantiomer of this compound. Number of stereogenic centers: Number of stereoisomers possible: 1b. Draw one of the two most stable stereoisomers of the compound in 1a using a planar structure with wedges and dashes. Now draw it in its preferred chair conformation. 1d. Draw two meso compounds with the molecular formula of C7H14.
- 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 H b. NH₂ 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). d. Br Br OH door OH Br b. CH3 HC OH H-C O Br $R= C. OH Br Br OH Br 15. Assign R and S to each chiral center. Br H. CI NH2 H, OH H... OCH3 CH3 H. NC A A [ [ Choose ] [ Choose ] [ Choose ] C [ [ Choose ] DFor molecule CH3CH2CH(OH)CH3 I. Identify chiral centre II. Draw a pair of enantiomers using 3-dimensional structure