3) Assign the stereochemistry of the following chiral compounds as R or S. ОН Br CH2CH3 c) CH,OH H3C a) b) ОН CH,CH3 CH,CI CH,CH,CH3 CO,H d) Cl- e) НО- H. ČH,CH,CH3
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A: The structures of all 12 acyclic (no rings) isomers of formula C4H7Br are shown below.
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A: Yes, the product will have a chiral center.
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- Q2 Give the stereochemical relationships between each pair of structures. Examples are same compound, structural isomers, enantiomers, diastereomers. CH,OH CH,OH (c) ÇH, ÇH, (a) CH, CH, (b) Но HO H H OH HO-H HO H H- ОН НО H OH H- H- HO- H OH HO H H OH CH, CH, CH, CH, CH, CH, onared1. Which of the following is a chiral molecule? Encircle the substituents that make it chiral. H c=c=CCH3 'CO2OH (A) CH2OH CO2H H (B) (C) CH3 CH3 (D) poddnsQ2 Give the stereochemical relationships between each pair of structures. Examples are same compound, structural isomers, enantiomers, diastereomers. (a) CH, CH, CHOH CHOH CH, CH, H OH HO-H H OH HO H H--CH HO- HO H H- OH HO- OH HO H H-OH CH, CH, CH, CH, CH, CH,
- NH2 N CH2 CH2 The stereochemistry around this chiral carbon is: O cannot be determined. O Rand S OR OSDepartment Final EXd Q1: Coibacin B is a natural product that exhibits potent anti-inflammatory activity and potential activity in the treatment of leishmaniasis, a disease caused by certain parasites. HAH H (a) Assign the configuration (R or S) of each chiral center in coibacin B. (b) Identify the number of possible stereoisomers for this compound, assuming that the geometry of the alkenes is fixed.Draw a structural formula of the S configuration of the compound shown below. • Use the wedge /hash bond tools to indicate stereochemistry where it exists. Include H atoms at chiral centers only. • Ifa group is achiral, do not use wedged or hashed bonds on it. CH3 CH3 CH;CHCHCN CH,CH,CH,CHCH,CH, CH2NH2 Draw a structural formula of the RS configuration of the compound shown below. Use the wedge /hash bond tools to indicate stereochemistry where it exists. • Include H atoms at chiral centers only. If a group is achiral, do not use wedged or hashed bonds on it. ÇI
- Q1:- Which of the isomeric alcohols having formula CSH120 are chiral ? Which are achiral? Draw the enantiomers. Q2:- Which of the following compounds are chiral? Draw the stereo structures. a- 1-Chloro-2-bromobutane b- 1,2-Dichloro-3-methyibutane2. Identify the type of stereoisomerism in each of the following molecules and draw the stereoisomer pair. (a) CH;CH=CHCOH (b) CgH;CH2CH(NH2)CH3Q2 Give the stereochemical relationships between each pair of structures. Examples are same compound, structural isomers, enantiomers, diastereomers. markSI CH, CH, (h) CH,OH CHOH CH, CH, (a) (e) OH HO- H OH HO H- -OH HO H H OH HO- HO H H OH OH HO- CH, CH, CH, CH, CH, CH,
- 4. Draw all the stereoisomers of (a) 3-chloro-2-pentanol and (b) 2-bromo-3-hydroxybutane. Give the stereochemistry relationships of stereoisomers (indicate which isomers are enantiomers / diastereomers).3) Draw the most stable conformation of (2Z, 4E)-2,4-hexadiene.5) For the following: a) Draw the "flat" line structure of the following (be sure to indicate stereochemistry) Br OH b) Draw both chair conformations of the following compound. Indicate which form is the most stable H3C°