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- Ketones react with alcohols to yield products called acetals. Why does the all-cis isomer of 4-tert-butyl-1,3-cyclohexanediol react readily with acetone and an acid catalyst to form an acetal, but other stereoisomers do not react? In formulating your answer, draw the more stable chair conformations of all four stereoisomers and the product acetal for each one.What is the absolute stereochemistry at the purple carbons?What is the structures of A-C and what’s the stereochemistry of them.?
- 7. (-)-Menthol is responsible for the characteristic flavor and taste of peppermint. The structure of (-)-menthol is shown below. Use this information to answer the following question. H3C H. H H CHCH3 CH3 On the chair tempiate provided below, draw the two chair conformations that are in equilibrium for (-)-menthol (use the correspondii.g numbers on the menthol ring above to match the same numbers on the template).5.39 What is the stereochemical configuration of the enantiomer of (2S,4R) - 2,4- octanediol? (A diol is a compound with two -OH groups.) 6.21 - Draw an energy diagram for a two-step reaction with K Label the overall AG°, transition states, and intermediate. Is AG° positive or negative? eq > 1. 5.39- What is the stereochemical configuration of the enantiomer of (25,4R)-2,4- octanediol? (A diol is a compound with two -OH groups.) 6.21- Draw an energy diagram for a two-step reaction with Keq > 1. Label the overall AG,transition states, and intermediate. Is AG° negative?Name the following compounds include stereochemistry.
- Dehydrohalogenation of 1-chloro-1-methylcyclopropane affords two alkenes (A and B) as products. Explain why A is the major product despite the fact that it contains the less substituted double bond.Complete the following: Stereochemistry, enantio-, and regioselectivity are important. CrO3, H2SO4 a) OH Bromination of an alcohol (Sn2) type EtO₂C CO₂Et b) b) d) H3CO type NH2 a) b) H3CO type a) b) OH g) type CN CI h) acetone Swern Oxidation type type CO₂H type Доно i) Me3SICI, Imidazole OSiMe3 Et3N, CH2Cl2 Br type a) Mg°, THF Br j) b); H3O+ H2SO4 (H+) MeOH OMe type typeDraw the structures and specify the stereochemistry of compounds A-C.
- Which chair conformation of trans-1-tert-butyl-4-methylcyclohexane is more stable? Clearly explain the reason by discussing both of the possible chair conformations please. Thanks.11. Trans-1-bromo-2-methylcyclohexane will yield a non-Zaitsev elimination product (3- methylcyclohexene) upon reaction with KOH. Show this reaction by drawing the chair conformations of the reactant and product. Include the curved arrows and explain why the product is not a non-Zaitsev product. (Draw the HOMO of the following 5-carbon conjugated pi systems and draw the thermal and photochemical electrocyclic ring closure reaction for each one. Determine whether each ring closure mechanism involves either a conrotatory or a disrotatory motion. 1. H2C=CH-CH=CH-CH2 (+) 2. H2C=CH-CH=CH-CH,-)