aldolisation

Traductions

• anglais

  Date : 1983

  Définition

  A reaction between two aldehyde molecules or between one aldehyde and one ketone molecule in which the position of one of the hydrogen atoms is changed so as to form a single molecule having one hydroxyl and one carbonyl group. Since such a molecule is partly an alcohol (CO group) and represents a union of two smaller molecules, the reaction is called an ald-ol condensation. It can be repeated to form molecules of increasing molecular weight. The condensation of formaldehyde to sugars in plants, which on repetition builds up the more complex carbohydrate structures such as starch and cellulose, is thought to be a reaction of this type. It occurs most effectively in an alkaline medium.

  Terme :

  1. aldol condensation