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Types of Reactions
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Types of Reactions

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Questions and Answers

What is the first step in an electrophilic addition mechanism?

  • The alkene is converted into a carbocation
  • The electrophile attracts the loosely held electrons from the pi bond of an alkene (correct)
  • The carbocation reacts with a nucleophile to form a sigma bond
  • The pi bond of the alkene is broken

    • What is the result of the electrophile's attraction of the pi bond electrons?

  • The pi bond is strengthened
  • The nucleophile is formed
  • The alkene is converted into a carbocation
  • The electrophile forms a sigma bond to one of the carbons (correct)

    • What is the role of the carbocation in an electrophilic addition mechanism?

  • It breaks the pi bond
  • It acts as an electrophile (correct)
  • It acts as a nucleophile
  • It donates electrons to the alkene

    • What is the rate-determining step in an electrophilic addition mechanism?

    <p>The electrophile's attraction of the pi bond electrons</p> Signup and view all the answers

    What is required for an electrophilic addition mechanism to occur?

    <p>An acidic, electron-seeking reagent</p> Signup and view all the answers

    What is the electrophile in an electrophilic addition mechanism?

    <p>A Lewis acid</p> Signup and view all the answers

    What is a characteristic of the electrophile in an electrophilic addition mechanism?

    <p>It is electron-deficient</p> Signup and view all the answers

    What is the result of the reaction between the carbocation and the nucleophile?

    <p>A sigma bond is formed</p> Signup and view all the answers

    Why is electrophilic addition mechanism consistent with the occurrence of rearrangements?

    <p>Because the reaction involves a carbocation intermediate</p> Signup and view all the answers

    What is the general term for the type of reagent that is involved in an electrophilic addition mechanism?

    <p>Electrophile</p> Signup and view all the answers

    In electrophilic addition, the electrophile forms a sigma bond to both carbons of the former double bond.

    <p>False</p> Signup and view all the answers

    The electrophile is a strong nucleophile.

    <p>False</p> Signup and view all the answers

    Electrophilic addition involves a single step.

    <p>False</p> Signup and view all the answers

    The carbocation is a weak electrophile.

    <p>False</p> Signup and view all the answers

    The rate of electrophilic addition is entirely controlled by the second step.

    <p>False</p> Signup and view all the answers

    Electrophilic addition can only occur with Lowry-Bronsted acids.

    <p>False</p> Signup and view all the answers

    The electrophile attracts the tightly held electrons from the pi bond of an alkene.

    <p>False</p> Signup and view all the answers

    The nucleophile is a strong electrophile.

    <p>False</p> Signup and view all the answers

    Electrophilic addition is a type of nucleophilic addition.

    <p>False</p> Signup and view all the answers

    The reaction between the carbocation and the nucleophile results in a pi bond.

    <p>False</p> Signup and view all the answers

    When naming cycloalkenes, the double bond is always between C1 and C3.

    <p>False</p> Signup and view all the answers

    Alicyclic hydrocarbons are prepared from other cyclic compounds.

    <p>True</p> Signup and view all the answers

    Cycloalkanes undergo mainly addition reactions.

    <p>False</p> Signup and view all the answers

    The position of the double bond in the name of a cycloalkene needs to be indicated.

    <p>False</p> Signup and view all the answers

    Cycloalkanes undergo the same reactions as their open-chain analogs, with some exceptions.

    <p>True</p> Signup and view all the answers

    Cycloalkenes can undergo cleavage reactions.

    <p>True</p> Signup and view all the answers

    Alicyclic hydrocarbons are prepared from open-chain compounds.

    <p>False</p> Signup and view all the answers

    Cycloalkanes undergo electrophilic addition reactions.

    <p>False</p> Signup and view all the answers

    Cycloalkenes undergo free-radical substitution reactions.

    <p>True</p> Signup and view all the answers

    The first substituent in a cycloalkene has as high a number as possible.

    <p>False</p> Signup and view all the answers

    How are cycloalkenes named?

    <p>By numbering the cycloalkene so that the double bond is between C1 and C2</p> Signup and view all the answers

    What type of reactions do cycloalkanes undergo chiefly?

    <p>Free-radical substitution reactions</p> Signup and view all the answers

    How are alicyclic hydrocarbons prepared?

    <p>From other cyclic compounds</p> Signup and view all the answers

    What type of reactions do cycloalkenes undergo?

    <p>Addition reactions, both electrophilic and free radical</p> Signup and view all the answers

    What is a characteristic of naming cycloalkenes?

    <p>The first substituent has as low a number as possible</p> Signup and view all the answers

    How do cycloalkanes react with other compounds?

    <p>They undergo the same reactions as their open-chain analogs, with some exceptions</p> Signup and view all the answers

    What is the similarity between naming cycloalkenes and alkenes?

    <p>They are named similarly, but the double bond is between C1 and C2</p> Signup and view all the answers

    What is the exception to the rule that cycloalkanes undergo the same reactions as their open-chain analogs?

    <p>Some cycloalkanes undergo certain very important and interesting reactions</p> Signup and view all the answers

    What determines the numbering of the cycloalkene?

    <p>The first substituent</p> Signup and view all the answers

    What is the result of naming cycloalkenes?

    <p>The double bond is between C1 and C2, and the first substituent has as low a number as possible</p> Signup and view all the answers

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