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Q: a. Which of these two can exist as a pair of enantiomers? b. Draw the pair of enantiomers using…
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Q: 2. Mark any chirality centers (asymmetric carbons) with a *. How many stereoisomers are possible? Br
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For the following molecules:
a. How many stereogenic centers are present?
b. How many stereoisomers are possible for these molecules?
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- How 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 2705. different compounds b) that are not isolielss bicucional isomers! a) How many stereocenters does this compound have? How many stereoisomers are possible for this compound? Write most under the memb NH₂ most stable. each trio which is least stable. NH₂2. For each pair of structures shown, indicate whether the two species are constitutional isomers, enantiomers, diastereomers of one another, or identical molecules. For each structure draw Fisher projection. b) c) d) f) H₂CO H₂CO Br 'H H Br *6 = 96 # ~*=~= # H₂CO H₂CO H₂CO H₂CO *=*= H₂CO H₂CO H H H H H₂CO ~*=*= H₂CO Br Br Br Br Lonty H =j= H₂CO Br K‡ H= H8. 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)C. IDENTIFYING STEREOISOMERS: Label each pair of molecules below as enantiomers, diastereomers or identical CO₂H HO HC но-- н H -.Н CH3 OH CH₂OH HO™ H₂OC H₂C Н-- HO Н CH3 OHH CH₂OH HOC-... HOCH₂. H OH H OH HO H CHO COzH ОНС но с HO H COzH Н ОН НО Н CH₂OHCopy the structure and mark all stereocenters in each molecule and tell how many stereoisomers are possible for each Letter d, e and f only.pt. 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 er3. Complete the following 3 tasks for each molecule a-f. i. Label each molecule as chiral, achiral, optically active, ii. iii. optically inactive, and/or meso. Label any stereocenters found in each molecule as R or S. Identify the relationship between the molecule in the box and molecules a-f. Are they identical molecules, resonance structures, enantiomers, diastereomers, constitutional isomers, or molecules with different molecular formulas? A molecular model kit may help you compare structures. a. C. e. :O: d. .N. :O: بعد ہم f. :O: :0 N.capacity. How many stereocentres does the molecule contain? H .N. *H,N N. Select one: O a. one O b. two O c. three O d. four O e. noneOn the molecule below, highlight all R stereocenters in red and all S stereocenters in blue. If it doesn't conta box under the drawing area. No stereocenters H₂N XHO CH3 a. Label with asterisks (*) all of the stereocentres in the molecule shown above. b. How many stereoisomers are possible? c. Draw the structures of one pair of enantiomers for the above molecule. (Hint: You should draw two structures using wedge and dashed wedge bonds.)On the molecule below, highlight all R stereocenters in red and all S stereocenters in blue. If it doesn't contain any stereocenters, check the "No Stereocenters" box under the drawing area. H ŚSEE MORE QUESTIONS