Consider the following compounds: CO,H СНО ОНС ОНС CO,H H3C H- H H -HO- H;C H. HO H ČO,H O, CH3 A B (a) Label the asymmetric carbons as R or S on each compound (A - C). (b) Which compounds, if any, are enantiomers? diastereomers? identical?
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- 11. Consider the following compounds: ÇO,H CHO ОНС H. ОНС CO,H H3C- -- H. HO- H3C H. O, H ČOH HO, CH3 B (a) Label the asymmetric carbons as R or S on each compound (A - C). (b) Which compounds, if any, are enantiomers? diastereomers? identical?5. Consider the following pairs of structures. Identify the relationship between them (enantiomers, diastereomers, or identical compounds. HOH2C H OH H OH HO H Br H3C Н H H₂CH₂C CI Br H CHO CH3 I CH3 OH OHC Н H OH H OH Bell!! H3C, HO H Н.С H CH₂CH3 CH3 CI HỌ,H CH₂OH Br8. 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)
- Two structures are shown. Identify the asymmetric carbons in each structure, classify as chiral or achiral, and identify the number of stereocenter(s). H. „CH3 H3C CH3 H H. CH3 compound A compound B Which image shows the asymmetric carbon(s) in compound A highlighted in red? CI H H3C CH3 H,C CH3 O Neither. There are no asymmetric carbons in compound A. H. H3C -CH3 C H3C CH3 Compound A is . There are stereocenters in compound A. Which image shows the asymmetric carbon(s) in compound B highlighted in reď? .CH3 H H. CH3 H3C.C H O Neither. There are no asymmetric carbons in compound B. Compound B is There are stercocenters in compound B. *Please explain all the questionsIs the molecules shown below chiral or achiral OH b CH3 c=c=C CO20H ОН CH2OH HO2C CO2H e CH3 CH3Two structures are shown. Identify the asymmetric carbons in each structure, classify as chiral or achiral, and identify the number of stereocenter(s). H. „CH3 H3C CH3 H H. CH3 compound A compound B Which image shows the asymmetric carbon(s) in compound A highlighted in red? CI H H3C CH3 H3C CH3 O Neither. There are no asymmetric carbons in compound A. H3C -CH3 H3C CH3 Compound A is . There are stereocenters in compound A. Which image shows the asymmetric carbon(s) in compound B highlighted in red? CH3 H H. CH3 H3C.C H O Neither. There are no asymmetric carbons in compound B. Compound B is . There are stercocenters in compound B. *Please explain all the questions
- 6) Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound? CO20H CH3 t, H2N . CO2H WH2 CH3 7) Which of the following terms best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound? CH3 H C OH 3. HO4. · For each pair of structures shown below indicate whether the two compounds are constitutional isomers, not isomers, configurational diastereomers or configurational enantiomers of one another, identical compounds (meso), or identical compounds (not meso). and CI .CI "CH3 "CH3 ОН CH3 -CH3 НО and H3C- ОН H- CH3 H OH H Br Br LCH3 CH3 and H H3C" ČI CH3 H3C H. H and H andGiven the following structure and numbering: H CO,H 3 H3C 1 A (a) Label the stereocenters of A as R or S and draw a Fischer Projection of the enantiomer of A with C1 on top and C4 on bottom. (b) Draw a Newman Projection of a diastereomer of 4 looking down the C2-C3 bond with C2 in front.
- 8. Two structures of Lipitor (a drug used to lower cholesterol) are shown below. (a) Determine the absolute configuration of each indicated stereocenter. Fill in the correct circle. (b) Determine if the two structures are the same compound or stereoisomers. Fill in the correct circle. (a) НО. Carbon a HO O OH Carbon a: OR OS Carbon b H N Carbon b: R OS of H Carbon c: OR OS OH OH Carbon c F Carbon d: R OS OH Carbon d (b) The two structures are: O the same compound O stereoisomers(a) assign R or S configuration to each chiral center, (b) Which compound are enantiomers? (c) Which compounds are diastereomers?Following are stereorepresentations for the four stereoisomers of 3-chloro-2-butanol. (a) Assign an R or S configuration to each chiral center. (b) Which compounds are enantiomers? (c) Which compound are diastereomers?