Sandmeyer Reaction Quiz
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Questions and Answers

What was the main product isolated by Traugott Sandmeyer when he attempted to synthesize phenylacetylene?

  • Chlorobenzene (correct)
  • Iodobenzene
  • Bromobenzene
  • Fluorobenzene

What is the Sandmeyer reaction an example of?

  • Radical-nucleophilic aromatic substitution (correct)
  • Free radical addition
  • Nucleophilic aliphatic substitution
  • Electrophilic aromatic substitution

What other reaction has been developed as a 'Sandmeyer-type' reaction in more recent times?

  • Trifluoromethylation (correct)
  • Reduction
  • Oxidation
  • Decarboxylation

Which of the following does not require a metal catalyst and is not usually referred to as a Sandmeyer reaction?

<p>Fluorination using tetrafluoroborate anions (Balz–Schiemann reaction) (D)</p> Signup and view all the answers

Which metal catalyst is commonly employed in Sandmeyer reactions for cyanation?

<p>CuCN (A)</p> Signup and view all the answers

What is the IUPAC Gold Book definition of an intermediate in a chemical reaction?

<p>A compound with a lifetime greater than a molecular vibration, formed from the reactants, and reacts further to give the products of a chemical reaction (B)</p> Signup and view all the answers

In the reaction A + B ⟶ X ⟶ C + D, what is X?

<p>A reaction intermediate (D)</p> Signup and view all the answers

What is the main characteristic of a reactive intermediate?

<p>Short lifetime and further reactivity to give products (C)</p> Signup and view all the answers

How is the phrase 'reaction intermediate' often abbreviated?

<p>'Intermediate' (B)</p> Signup and view all the answers

What does a reaction intermediate not appear in for the overall reaction?

<p>Chemical equation (C)</p> Signup and view all the answers

Study Notes

Sandmeyer Reaction

  • Traugott Sandmeyer isolated diazonium salts when attempting to synthesize phenylacetylene
  • The Sandmeyer reaction is an example of a nucleophilic aromatic substitution reaction

Recent Developments

  • The Chan-Lam reaction is a recent example of a 'Sandmeyer-type' reaction

Characteristics of Sandmeyer Reactions

  • Sandmeyer reactions typically require a metal catalyst
  • The copper(I) cyanide catalyst is commonly employed for cyanation in Sandmeyer reactions
  • The Chan-Lam reaction does not require a metal catalyst and is not usually referred to as a Sandmeyer reaction

Reaction Intermediates

  • According to the IUPAC Gold Book, an intermediate in a chemical reaction is a molecular entity with a lifetime sufficiently long to possess measurable properties
  • In the reaction A + B ⟶ X ⟶ C + D, X is an intermediate
  • A reactive intermediate has a short lifetime and is usually highly reactive
  • The phrase 'reaction intermediate' is often abbreviated as 'intermediate'
  • A reaction intermediate does not appear in the overall reaction equation

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Description

Test your knowledge of the Sandmeyer reaction, a chemical process for synthesizing aryl halides from aryl diazonium salts using copper reagents. Learn about the unique transformations it enables on benzene, such as halogenation, cyanation, trifluoromethylation, and hydroxylation. Discover the history and significance of this reaction in organic chemistry.

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