Draw the enantiomer of the molecule shown below. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable.
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- Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.a model of cyclohexane in a chair conformation, and explain why the names “axial” and“equatorial’ are appropriate.Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of methylcyclohexane in the chair conformation: a. When the methyl group is in an axial or equatorial (circle one) position, the molecule is inits lowest potential energy conformation. b. Label one Newman projection above anti and the other gauche to describe the relationshipbetween the methyl group and C3 of the ring. c. In general, which is a lower PE conformation, anti or gauche? d. Explain how your answer to b and c provide an explanation for why it is more favorable fora large group to be in an equatorial than an axial position.
- Consider the Newman projection below. a. Draw a full Lewis structure of this molecule with R1=Me,R2=Et , and R3=iPr . b. Given the sizes of these R groups (R3R2R1) , does the Newman projection above show thelowest potential energy conformation of this bond? If not, draw a Newman projectionshowing the lowest P.E. conformation (sighting down this same bond). c. To draw a Newman projection in the lowest P.E. conformation, the following rule of thumbusually applies: Place the largest group on the front carbon anti to the largest group on theback carbon. Is your answer to the previous question consistent with this rule of thumb?.....Draw the Newman pr0jecti0ns 0f the three p0ssible staggered c0nf0rmati0ns 0f2,3-dimethylbutane, viewed thr0ugh the C2—C3 b0nd. What are the relativeenergies of each c0nf0rmati0n?to Medical Chemistry II. (BMC1CHEM02) oard / My courses / Introduction to Medical Chemistry II. (BMCICHEM02) / 29/03 2021 Chemistry Electronic te Electronic test in Chemistry n3 Cyclobutane is more stable molecule than cyclopropane, because.... Select one: ut of it has less angle strain. cyclobutane has a cis-trans stereoisomers. cyclobutane is a larger ring. it has more torsional strain. cyclopropane is planar. Next page
- a. b. For the following two pairs of molecules, (1) Draw out the chair conformation for each molecule, flip the ring if it is possible. (2) Compare both molecules to circle out which one is more stable. (3) Identify their relationship as: constitutional isomer, conformational isomer, stereoisomer or identical. (4) Find all the chiral center on each molecule and label them. Br.. Ax < and and H. H H Br H HI believe the first anwer is d and the second is a mixture of enantiomersDrav the most stable compound below. Show chair conforma ton for the BOTH bonds to each Subshituted as axial or substitvents equaterial. Carbon and mark CHz CH; what types of strains mihimized in his of strain that may are conformation? Mark any sarces be present in the con frmer drawn.
- Are the pairs molecules given below (pair a, b, c) related to each other as constitutional isomers, enantiomers, diastereomers, or identical? a Relationships OH Et Et Но- -H- H. .CH3 a: CI CH3 HO `H b: CI H CI c: a Relationships H H. CI-CH2CH3 H H H3CH2C- CI H3CH2C- H -CI a: b: H- -CI -- ČH2CH3 CI C: a Relationships and a: .CI b: c:1) Are the molecules A and B... conformational isomers? Diastereomers? Enantiomers? Position isomers? Non-related? 2) What about the molecules B and C? 3) What about the molecules C and D?Compound 1 Br Bri НІ T ... H The correct IUPAC names are: Compound 2 H Br Br I.. H Br The compounds are diastereomers not isomeric enantiomers identical constitutional isomers Compound 1: (2R, 3R)-1,2,3-tribromobutane, Compound 2: (2S, 3R)-1,2,3-tribromobutane Compound 1: (2R, 3S)-1,2,3-tribromobutane, O Compound 1: (2R,3R)-1,2,3-tribromobutane, Compound 2: (2S,3S)-1,2,3-tribromobutane Compound 2: (2R, 3R)-1,2,3-tribromobutane O Compound 1: (2S,3S)-1,2,3-tribromobutane, Compound 2: (2R,3S)-1,2,3-tribromobutane