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6868235
Hydroxynitrile
Descrição
Aqa
Sem etiquetas
aqa
chemistry
a level
chemistry
a level
Mapa Mental por
Grace Hyett
, atualizado more than 1 year ago
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Criado por
Grace Hyett
aproximadamente 8 anos atrás
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Resumo de Recurso
Hydroxynitrile
Production
3. A pair of electrons from the C=O double bond is pushed onto the oxygen
1. Potassium cyanide is an ionic compound.
It dissociates in water to form K+ ions and CN- ions
2. The CN- ion from the KCN attacks the partially positive carbon atom and donates a pair of electrons, forming a bond
4. The oxygen bonds to a H+ ion to form the hydroxyl group and a hydroxynitrile is produced
Racemic
Double bonds are planar, nucleophiles can attack from both sides of the double bond
The nucleophilic attack of cyanide ions in aldehydes or unsymmetrical ketones can lead to a racemic mixture of hydroxynitriles
This is because nucleophilic attack of the slightly positive carbon can occur from either above or below the plane
Different enantiomers form, so a racemic mixture is made
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