5.3 Draw the mirror image of each compound. Label each molecule as chiral or achiral. H Br CH3 CH3 a. CH3 Br b. BriC H CI C. O CH3 CH3 d. F CH₂CH3
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5.3 ONLY (ALL)
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- Examine the models for the presence of a plane of symmetry. Present or Not present? NH2 CH, CH3 CH, H;C -CH3 H,N NH2 H,C--NH, H,C- OH CH, PH2 PH2 CH, C. D. Which are superimposable on their mirror image? A, B, Cand/or D? Which model represents a chiral molecule?A. B. Cond/or D?4. For each of the following molecules, label each stereocenter as R or S. Label the molecules appropriately as chiral or meso. a. b. methionine NH₂ H d. но. OH c. D = 2H, T = ³H, isotopes of hydrogen. f.T. OH OH CI Y ОН1. Locate/Label the chirality center of the given molecules. a. OH H2N C H CH3 CH3 SH b. OH HO CH2NHC(CH3)3 HOCH2
- How many chirality centers does the following molecule contain? (Hint: Look at the entire group attached to each C, not just the directly attached atom) Select one: A. 2 CH3-CH₂-C-CH₂-C-CH-CH₂-C-CC13 B. 1 CI O C. O O D. 3 CI CH₂CH3 NH₂ CH₂CH3A. В. H. H | H3C' C~cCl3 H H3CC- Br ĊCH3 Br Br Br H2N NH2 CH3 CH3 Он: НО,, CI-C.CH3 H2C=C" H. c=CH2 HO OH С. D. Identify the pair(s) of enantiomers. Choose one or more: В. C. D.Label each molecule with chiral centers (R) and (S). Which ones have more than one?
- Which Fischer projection (A-D) correctly represents the bondline structure below? OH А. Н- Н О А CH3 H -OH OH Н В. НО- Н CH3 .... OH -H OH – НО Н С. CH3 Н -H OH D. НО- НО- CH3 Н H -H5. For the following: Answer I, II, III and/or IV CH3 ÇH3 ÇH3 CH3 но- HO-- но- - H HO- H- HO- но- H. HO- но H- H- C2H5 C2H5 C2H5 C2H5 III IV ... a. Which structure is an enantiomer of I? b. Which structure is an enantiomer of III? c. What two structures are diasteriomers of II?1. Label the following as a: diasteriomer, enantiomer or neither (different compound) CHO CHO a. H OH -HO- a. HO H and H OH HO- H OH CH,OH ČHHOH b. СНО СНО H OH HO H b. H OH HO H and H OH HO H H OH HO H ČH2OH 2. Indicate whether each of the following molecules are chiral or achiral. Circle the chiral carbon(s) if present in the structure. HOHO CH 3 H C=C%3DC%3DC BICH 2 C-CH 2CH 3 H3C CH3 H. b. а. C.
- 4. For each of the following molecules: H₂C H₂C Me a) Label each chiral atom with its R or S configuration b) Label each molecule as chiral or achiral c) For each chiral molecule, draw its enantiomer NH₂ H RICE H CH, Br H Me4. Draw the compound, 2-pentanol, shown on the PubChem website. Label any stereocenter(s) as to their absolute configuration, e.g. R or S. 5. Is there a plane of symmetry in 2-pentanol, yes or no? 6. Is 2-pentanol chiral or achiral?The following compound possesses a plane of symmetry. Choose the structure that correctly shows the plane of symmetry in the compound. You may need to rotate a single bond to place the molecule into a conformation where you can more readily see the plane of symmetry. H3C H3C Br H3C Bri H3C Н Н Br ... H Н HI CH3 H Br CH3 Br CH3 Br Bri Н Br ...IH CH3 II S