(i) Cross Aldol Condensation : When aldol condensation is carried out between two different aldehydes and (or) ketones, it is called cross aldol condensation.
→ If both the reactants contain α–hydrogen atoms, it gives a mixture of four products.
Ketones can also be used as one component in the cross aldol reactions
1, 3 – Diphenylprop–2–en–1–one (Benzalacetophenone)
(ii) Decarboxylation : Carboxylic acids lose carbon dioxide molecule to produce hydrocarbons on heating their sodium salts with sodalime (a mixutre of NaOH & CaO in ratio 3 : 1)
→ This reaction is called decarboxylation
