Types of Organic Reactions
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Questions and Answers

Which reaction type involves the breaking of a carbon-hydrogen bond and the formation of a carbon-oxygen bond?

  • Reduction
  • Oxidation (correct)
  • Electrophilic addition
  • Nucleophilic substitution

Which reaction type involves the formation of a new carbon-carbon bond?

  • Elimination
  • Nucleophilic addition (correct)
  • Rearrangement
  • Electrophilic substitution

Which reaction type does NOT involve a change in the number of carbon atoms in the molecule?

  • Substitution (correct)
  • Elimination
  • Addition
  • Rearrangement

Which reaction type is characterized by the formation of a cyclic intermediate?

<p>Pericyclic Reaction (B)</p> Signup and view all the answers

Which of the following reactions is an example of electrophilic substitution?

<p>Nitration of benzene (D)</p> Signup and view all the answers

The reaction of an alkene with bromine in the presence of light is an example of what type of reaction?

<p>Free Radical Addition (C)</p> Signup and view all the answers

Which reaction type is most closely related to the concept of Markovnikov's rule?

<p>Electrophilic Addition (D)</p> Signup and view all the answers

Which reaction type is often used in the synthesis of polymers?

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

Which of these reactions involves the breaking of a bond in a molecule due to the reaction with water?

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

Which of these processes results in the formation of a larger molecule from two smaller molecules, often with the loss of a small molecule like water?

<p>Condensation Reaction (B)</p> Signup and view all the answers

Which type of reaction involves the addition of atoms to an alkene or alkyne?

<p>Electrophilic Addition (B)</p> Signup and view all the answers

Which of these reactions involves the transfer of electrons, leading to oxidation or reduction?

<p>Redox Reaction (B)</p> Signup and view all the answers

Which of these reactions involve free radicals as intermediates?

<p>Radical Reactions (D)</p> Signup and view all the answers

Which type of polymerization involves the combination of monomers without any by-products?

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

Which of the following is NOT a type of substitution reaction?

<p>Free Radical Substitution (B)</p> Signup and view all the answers

Which of these reactions involves the rearrangement of atoms within a molecule to form a structural isomer?

<p>Rearrangement Reaction (B)</p> Signup and view all the answers

What is the primary difference between an SN1 and an SN2 reaction?

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

What is a common example of an electrophilic addition reaction?

<p>Hydrohalogenation of an alkene (A)</p> Signup and view all the answers

Flashcards

Substitution Reaction

A reaction where one atom or group is replaced by another.

Nucleophilic Substitution

A reaction where a nucleophile (electron-rich species) attacks an electrophile (electron-deficient species), replacing a leaving group.

Sâ‚™2 Reaction

A reaction where a nucleophile attacks a carbon atom with a leaving group, proceeding in one step. The reaction is favored by primary and secondary haloalkanes.

Sâ‚™1 Reaction

A reaction where a nucleophile attacks a carbon atom with a leaving group, proceeding in two steps. The reaction is favored by tertiary haloalkanes.

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Electrophilic Substitution

A reaction where an electrophile (electron-deficient species) attacks a molecule with a pi bond, replacing a leaving group or adding to the molecule.

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Addition Reaction

A reaction where atoms or groups are added across a double or triple bond.

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Electrophilic Addition

A reaction where an electrophile (electron-deficient species) attacks a pi bond, adding to the molecule.

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Elimination Reaction

A reaction where a molecule loses an atom or group, forming a new double or triple bond.

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SN1 Reaction

A nucleophilic substitution reaction with one step. It involves the formation of a carbocation intermediate.

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SN2 Reaction

A nucleophilic substitution reaction with two steps. The nucleophile attacks the substrate directly.

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E1 reaction

An elimination reaction with one step, involving the formation of a carbocation intermediate.

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E2 reaction

An elimination reaction with two steps where the base removes a proton and a leaving group in a single step.

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Rearrangement Reactions

Reactions where atoms or groups within a molecule rearrange to produce structural isomers.

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Study Notes

Types of Organic Reactions

  • Substitution Reactions: One atom or group is replaced by another.

    • Nucleophilic Substitution: Nucleophile replaces a leaving group.
      • SN1 (Unimolecular): Single step, rate depends on substrate concentration.
      • SN2 (Bimolecular): Concerted reaction, rate depends on substrate and nucleophile concentrations.
    • Electrophilic Substitution: Electrophile replaces a group, common in aromatic compounds.
  • Addition Reactions: Addition of atoms/groups to a multiple bond (double or triple).

    • Electrophilic Addition: Electrophiles added, to alkenes/alkynes.
    • Nucleophilic Addition: Nucleophiles added to compounds like carbonyls.
    • Free Radical Addition: Free radicals add.
  • Elimination Reactions: Atoms or groups removed, forming a multiple bond.

  • Rearrangement Reactions: Internal atom reorganization into isomers.

  • Redox Reactions: Electrons transferred causing oxidation (increase in oxidation state) or reduction (decrease).

  • Condensation Reactions: Two molecules combine to make a larger molecule, eliminating a small molecule like water.

  • Pericyclic Reactions: Reactions proceed via a cyclic transition state. (e.g., Diels-Alder reaction).

  • Radical Reactions: Reactions involving free radicals (unpaired electrons). (e.g., halogenation of alkanes).

  • Polymerization Reactions: Monomers combine to form polymers.

  • Addition Polymerization: No small molecules are produced.

  • Condensation Polymerization: Small molecules (like water) are produced.

  • Hydrolysis Reactions: Breakdown of a molecule by reacting with water.

  • Combustion Reactions: Organic compounds react with oxygen to produce carbon dioxide, water and energy.

  • Isomerization Reactions: Molecules transform to structural isomers (same formula, different structure)

  • Carbenoid Reactions: Involve carbene or carbene-like intermediates.

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Description

This quiz covers the various types of organic reactions including substitution, addition, elimination, rearrangement, and redox reactions. You will explore specific mechanisms such as nucleophilic and electrophilic reactions. Test your knowledge and understanding of these core concepts in organic chemistry.

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