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Organic Lab Reactions 100

Organic Lab Reactions 100 - INTRODUCTION 95 though this...

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INTRODUCTION 95 though this name has been applied at various times to the reactions brought about by a variety of agents, it will be restricted, in the present discussion, to the dismutation of two similar aldehyde groups into the corresponding alcohol and carboxylic salt functions by means of aqueous or alcoholic alkali. The conversion of benzaldehyde into a mixture of benzyl alcohol and sodium benzoate is an example. CHO + NaOH - Dismutations of the same type, but involving two unlike aldehyde mole- cules, will be classed as "crossed" Cannizzaro reactions. The reduction of benzaldehyde to benzyl alcohol by means of formaldehyde and alkali is an example. H 2 CO - ^ - > II r — - - + HCO 2 Na The most commonly employed procedure for carrying out the reaction consists in shaking or stirring the aldehyde with strong (50%) alkali, in aqueous or alcoholic solution, without heating. Other reagents which can be employed to bring about the dismutation include alkali amides in
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