COOH CCH3 COOH COOH COOH COOH H- CH3 H3C- H C CH2OH NH2 NH2 NH2 NH2 NH2 CAT BAT MAT RAT PAT 1. An optically inactive compound Answer: 2. An R-enantiomer Answer: 3. A Flying-wedge representation of BAT Answer:
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- For the following molecules: a. How many stereogenic centers are present? b. How many stereoisomers are possible for these molecules?Indicate the relationship between each pair. Choose from: configurational stereoisomers,conformers, constitutional isomers, or different formulas (Each term is used at least twice.)Lithocholic acid is an A–B cis steroid found in human bile. Draw lithocholic acid showing chair conformations, as in Figure 27-11, and tell whether the hydroxyl group at C3 is axial or equatorial.
- a model of cyclohexane in a chair conformation, and explain why the names “axial” and“equatorial’ are appropriate.Using molecular models as well as structural drawings, explain why trans-decalin is rigid and cannot ring-flip whereas cis-decalin can easily ring-flip.cis-1,2-Dimethylcyclohexane is optically inactive even though it has two chirality centers. Explain.
- Draw all possible configurational stereoisomers for the given molecule below. Designate the R/S on the stereogenic centers and E/Z on the C=CHow is compound A related to compounds B–E? Choose fromenantiomers, diastereomers, constitutional isomers, or identicalmolecules.Rank the following groups in order of decreasing priority. −CH=CH2, −CH3, −C≡CH, −H
- Optical active compound 1-chloro-3-methylcyclopentane was reacting withpotassium t-butoxide in t-butanol. Two alkene products were obtained. Themain product was optically active, and the secondary product was notoptically active. What are the two products?pls show the the isomers of butane-2,3-diol. Which pairs are enantiomers? diastereomers? mesomers? pls explain why for eachConstruct models of 1,2-dibromocyclopentaneand draw all the possible stereoisomers. Label each chirality centre with an*,andan Ror S. Indicate clearly which pairs are relatedasenantiomers and which as diastereoisomersor meso.