For 2-bromo-3-chlorobutane: a. Draw the 2-D Lewis structure b. How many stereoisomers are possible for this compound? С. Draw a Fischer projection for each; label enantiomers. Label diastereomers. Label any meso compounds (A meso compound is a compound that contains stereocenters but it is achiral).
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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?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?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.
- III. Consider the compound below. CH, CI- Br но O- H. (Atomic number: H-1, C-6, O-8, CI-17, Br-35) 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?6. For the following molecule a. Provide the R or S stereochemistry for each chiral carbon. b. How many possible isomers can this molecule have? c. Draw 2 different diastereomers and provide their R or S stereochemistry. d. Provide the IUPAC name for the structure. HO, BrHow many stereocenters are in the D-glucose molecule? a b. 2 . C 0 d 1 Clear my choice ROOM How many Rand S stereocenters are there in the 5-a Dihydrotestosterone molecule? a. 45, 38 b. 15, 6R C35, 4R d. 35, 3R e. 65 1R Clear my choice Total number of stereoisomers possible for the following compounds s O FORMIGA 0 270pt. 4: Molecular Models: Stereoisomers me: 4. Using the model of 2-bromobutane representing the R enantiomer from 4., switch any two groups on the chiral carbon. Compare this to your S enantiomer from 4. a. Are they the same or different? b. Are they the same or enantiomers? C. Now switch any pair of groups around the chiral carbon of the "switched" model again! Compare the "double-switched" model with the other unmodified S molecule from 4. Are they enantiomers or are they identical? С. Shown below is the Fisher projection of (R)-2-bromo-(S)-3-chlorobutane. ne mirror image of this stereoisomer and assign the RIS configurations of iral carbons for both isomers. е ll er10. These stereoisomers are; CO₂H H OH -H НО H- a. Identical -OH CH₂OH НО НО НО CO₂H -H H -H CH₂OH b. Enantiomers c. Diastereomers. d. meso isomers5 6 How many stereoisomers of the following molecule are possible in principle? Attachments HO H₂C A. 8 B. 128 C. 64 D. 32 E. 16 CH3 HO What is the relationship between the following two compounds? Attachments HO OH OH moja moja A. They are diastereomers B. They are enantiomers ⒸC. They are mesomers D. None of the above NH₂ OH8. Identify the stereochemical relationship between the structural pairs shown below as (A) identical structures that are not meso; (B) identical structures that ARE meso; (C) structures that are enantiomers; or (D) structures that are diastereomers. a) b) H3C c) CH3 Br H. CH3 Br Br CH3 H. CI Holl H Cill Cl- CH3 Br H. CI CH3 HO. H. H3C Cl H3C- H- H. CH3 Cl a) b) c) 9. Identify the stereochemical relationship between the structural pairs shown below as (A) identical structures that are not meso; (B) identical structures that ARE meso; (C) structures that are enantiomers; or (D) structures that are diastereomers. a) b) c) CH2CH3 NH2 HO CH3 H3C. CH3 Cl HO H;C CH2CH3 F. F H;C. CI H H,N -CH3 CH3 NH2 H3C Br H2N C1 H3C CH3 CH3 H;CH,C- Cl F H. H Br CH,CH3 CH3 a) b) c)Use the skeletal structure provided. CI OH HO .. A. provide the Fischer projections of the skeletal structure shown B. provide the structure (Fischer or skeletal) of a constitutional isomer C. provide the structure (Fischer or skeletal) of the enantiomer isomer H3C CH3 D. provide the structure (Fischer or skeletal) of a diastereomer isomer indicate if the structure can be classified as a meso compound. O Yes, meso O No, not mesoa) Which structures are Enantiomers? b) Which structures are Diastereomers? c) Which structures are meso compounds? Use the letters only for your answers. А. В. H H CI H H Cl C. H H D. H Cl ČI Cl CI HSEE MORE QUESTIONS