Condensation with an Aldehyde or Ketone OH ROH RO enolate ketone addition product Copyright 2010 Pearson Prentice Hall,Inc The enolate ion attacks the carbonyl group to form an alkoxide. Protonation of the alkoxide gives the addition product:a B-hydroxy carbonyl compound. Chapter 22 3Chapter 22 3 Condensation with an Aldehyde or Ketone ▪ The enolate ion attacks the carbonyl group to form an alkoxide. ▪ Protonation of the alkoxide gives the addition product: a b-hydroxy carbonyl compound