Nucleophilic Addition–Elimination (AQA A-Level Chemistry): Quizzes

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Nucleophilic Addition–Elimination
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Why are acyl chlorides more reactive than acid anhydrides?

ClCl is more electronegative than OO

What intermediate forms when a nucleophile attacks the carbonyl carbon?

Tetrahedral intermediate

What are the products when ammonia reacts with an acyl chloride?

Non-substituted amide and NH4ClNH_4Cl

What by-product forms when ammonia reacts with an acid anhydride?

Carboxylic acid (RCOOHRCOOH)

What leaving group is eliminated from acid anhydrides in the mechanism?

Carboxylate ion (RCOORCOO^-)

What observation occurs when ammonia reacts with an acyl chloride?

White fumes of NH4ClNH_4Cl

Why is reacting ammonia with haloalkanes not generally used to prepare primary amines?

Produces mixture of amine classifications

What conditions are needed to reduce nitriles to primary amines?

H2H_2 with Ni catalyst, high temp & pressure

What type of amines are prepared by reduction of nitriles?

Aliphatic amines

How many moles of H2H_2 are needed to reduce one mole of nitro compound (RNO2R-NO_2)?

3 moles

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