24. Enolate Chemistry: Reactions at the Alpha-Carbon

Which of the following represents the most favored enol tautomer of ${\mathrm{CH}}_3\mathrm{COCH}{3}_{}$ (acetone)?

Which of the following structures represents the enol form that is a tautomer of the aldehyde ${\mathrm{CH}}_3\mathrm{CHO}$ (acetaldehyde)?

Which of the following represents the enol form of ${\mathrm{CH}}_3\mathrm{COCH}{3}_{}$ (acetone)?

Which of the following best describes what happens when a tautomeric shift occurs?

Which of the following best represents the enol tautomer of ${\mathrm{CH}}_3{\mathrm{CO}}_2\mathrm{CH}{3}_2$ (acetone)?

Draw the enol tautomer for cyclopentanone

Which of the following pairs are keto–enol tautomers?

d.

e.