Define each stereocenter as either (R) or (S). If the molecule does not have a stereocenter select "achiral". OH H. CH2CH3 H3CH HO CH2CH3 CH3 H3CH2C' `CH3 ОН ČH2CH3
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- Define each stereocenter as either (R) or (S). If the molecule does not have a stereocenter select "achiral". A E G H H OH H H3C FOH H3C CH3 H3C Но -CH3 H- -OH Но- -CH3 но- CH3 H3C- ČH3 H OH В F HDefine each stereocenter as either (R) or (S). If the molecule does not have a stereocenter select "achiral". CH3 CI H CI CI CH3 H3C H3C., H 'CH3 Br H, Br Br Br8. 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
- 2. Label any stereocenters in the following molecule as (R) or (S): ОН H. .CH3 `CH3 ОНa. Draw the 14 constitutional isomers of molecular formula C8H9Cl that contain a benzene ring.b. Name all compounds that contain a trisubstituted benzene ring.c. For which compound(s) are stereoisomers possible? Draw all possible stereoisomers.a. Draw the 14 constitutional isomers of molecular formula C8H9Cl that contain a benzene ring. b.Name all compounds that contain a trisubstituted benzene ring. c.For which compound(s) are stereoisomers possible? Draw all possible stereoisomers.
- Which of the following is a pair of stereoisomer? H3C(H3C)HC CH3 HỌ CH3 HO- CH(CH3)CH3 H3CH2C´ H3CH2C A В OH CH(CH3)CH3 ICH(CH3)CH3 CH2CH3 ICH3 H3C H3CH2C OH D O a. A& B O b. A& D B&C5. Give the stereochemical relationship between each pair of isomers. Examples are same compound (meso), constitutional isomers, enantiomers, and diastereomers. H3C CH3 HO OH lll a. Но OH H Br CH3 b. C/ H3C CI H. ICH3 CH3 с. CH3 H. CH3 d. Но. H3C OH CH2OH Ho CH2OH Br e. Br H3C f. H CH3 H3C CH3Indicate whether the pair of structures shown represent stereoisomers, constitutional isomers, different conformations of the same compound, or the same conformation of a compound viewed from a different perspective. Note that cis, trans isomers are an example of stereoisomers. CH₂CH3 -CH₂CH3 H₂N. CH₂CH3 -NH₂ CH₂CH3 H₂N- NH₂
- 2. The following molecule is one enantiomer of methylenedioxymethamphetamine (MDMA). 2a. Circle all of the stereocenters in MDMA 2b. Assign the absolute stereochemistry (R or S) for each stereocenter .CH3 HN H H *CH3Part D. Do the two structures A and B of each pair drawn below represent the same molecule, constitutional isomers, or stereoisomers? If A and B are stereoisomers, further classify them as enantiomers or diastereomers. H3C Structure A H3C HO H3C H3C Br T H H3C H HO H3CC H C Br HC H H H H CH₂Br CH₂CH3 H CH₂CH3 CH₂OH OH H HO G G H HO H HO G CH3 CH3 CH3 Br Hallo H H3C H Structure B H3C CH3 Br WING H Br HOCH₂ CH3 CH3 HO H CH₂OH H CH₂CH3 H CH₂CH3 H H H H H H Gim CH3 H OH "H ·GII. CH3 HO. OH OH CH3 CH3 OH Relationship of A and B6. For each pair of compounds below determine whether they represent the same molecule, enantiomers, or diastereomers. CH H₂N H CH J OllinO 2||2 COOH C OH CH₂ OH NH₂ CH, COOH CH3 HO H₂N CH₂4 CH CCC COOH OH NH₂ NIIIIIC CH₂ H CH3 CH3 H₂N HO H₂N COOH CH OH 5- O J CH3 COOH O H CH₂ H COOH HO CH CH₂4 HOOC COOH ........ OH JCC H NH₂ NH₂ CH₂