Concept explainers
a)
Interpretation:
The structure of the product obtained by the hydroboration-oxidation of 2-methyl-2-pentene is to be given.
Concept introduction:
The hydroboration reaction takes place with syn stereochemistry and results in a non-Markovnikov addition of water to the double bond in an
To give:
The structure of the product obtained by the hydroboration-oxidation of 2-methyl-2-pentene.
b)
Interpretation:
The structure of the product obtained by the hydroboration-oxidation of the compound is to be given.
Concept introduction:
The hydroboration reaction takes place with syn stereochemistry and results in a non-Markovnikov addition of water to the double bond in the alkene. The resulting product has the hydroxyl group on the less highly substituted carbon.
To give:
The structure of the product obtained by the hydroboration-oxidation of the compound shown.
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Chapter 8 Solutions
Organic Chemistry
- Draw the organic product obtained by hydroboration-oxidation of each of the following alkenes: (a) trans-2-pentene, (b) 2-tert-butyl-3,3-dimethyl-1- butene, and (c) 1-methylcyclohexene. Having done this, draw the product of the acid-catalyzed hydration of these same alkenes. How do the reaction products differ?arrow_forwardYou are required to synthesize 2-bromopentane from the reaction between an alkene with HBr. Which alkene, 1-pentene or 2-pentene, should you react with HBr in order to get 2-bromopentane? Give an explanation.arrow_forwardAlkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product of the reaction is a vinyl alcohol, also called an enol. The enol immediately rearranges to a more stable ketone via tautomerization. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions -X티 Hö: H-O -CH3 -CH3 H30*arrow_forward
- CCH H20, H2SO4 H9SO4 CH3 Alkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product of the reaction is a vinyl alcohol, also called an enol. The enol immediately rearranges to a more stable ketone via tautomerization. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions Hjö: -CH3 -CH3 H3O*arrow_forwardHydroxylation of E-2-pentene with osmium tetroxide yields a different product than the same reaction using the Z configuration. Draw the structures of the alkenes and show the stereochemistry for each product. Explain any differences between them.arrow_forwardSuppose that the alkene in Figure 9 reacts with 1 mole of hydrogen chloride. Predict the structure of the main product of the reaction.arrow_forward
- C=CH H20, H2SO4 H9SO4 CH3 Alkynes do not react directly with aqueous acid as do alkenes, but will do so in the presence of mercury(II) sulfate as a Lewis acid catalyst. The reaction occurs with Markovnikov regiochemistry, so the OH group adds to the more highly substituted carbon and the H adds to the less highly substituted carbon. The initial product of the reaction is a vinyl alcohol, also called an enol. The enol immediately rearranges to a more stable ketone via tautomerization. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions H-OH HO: Hjö: C=CH c=CH Hö Hg Hgarrow_forwardEthers can be prepared by reaction of an alkoxide or phenoxide ion with a primary alkyl halide. Draw the structure of the expected organic product of the reaction of iodomethane with the following alkoxide ion: CH3 H3C O Na You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading. • Do not include counter-ions, e.g., Na", I, in your answer. орy вste ChemDoodlearrow_forwardFor each of the following alkenes, assign the configuration of the double bond as either Z or E:arrow_forward
- Two substitution products result from the reaction between 3-chloro-3-methyl-1- butene with sodium acetate (CH3COO – Na +) in acetic acid under SN1. Identify the products.arrow_forward22. Calculate the percent atom economy for the following hydroboration-oxidation reaction. This is another method of hydration of an alkene. Be careful with stoichiometry! You must multiply molecular weights by their stoichiometric coefficients. ОН 3 3 + BH3 +Na;BO3 + 3 H20 +3 H2O2 +3 NaOHarrow_forwardWrite the structure of the major products in the following reactions and name themarrow_forward
- Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks Cole