alcohols are polar molecules and readily add to ketones select the product of
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Which of these pair of reactants compounds may be used to make this given acetal?
Aldehydes and ketones undergo acid-catalyzed reaction with alcohols to yield hemiacetals, compounds that have one alcohol-like oxygen and one ether-like oxygen bonded to the same carbon. Further reaction of a hemiacetal with alcohol then yields an acetal, a compound that has two ether-like oxygens bonded to the same carbon. (EQUATION CAN'T COPY) (a) Show the structures of the hemiacetal and acetal you would obtain by reaction of cyclohexanone with ethanol. (b) Propose a mechanism for the conversion of a hemiacetal into an acetal.
Acetylide ions react with aldehydes and ketones to give alcohol addition products. In the box below draw the structure of the aldehyde/ketone and the acetylide ion used to prepare this compound: You do not have to consider stereochemistry. Separate multiple reactants using the + sign from the drop-down menu. Do not include counter-ions, e.g., Na+, I-, in your answer.
Adi S.
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