Haloalkanes And Haloarenes
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Questions and Answers

What characterizes a retention of configuration during a reaction?

  • The reaction produces a 50:50 mixture of isomers.
  • The product has the same configuration as the reactant. (correct)
  • The product is optically inactive.
  • The configuration has inverted in the product.

    • What outcome is referred to as racemisation?

  • The product formed has an inverted configuration.
  • Formation of two different products from one reactant.
  • The product is optically active with a plus sign.
  • A mixture of equal amounts of two enantiomers is produced. (correct)

    • Which mechanism results in the inverted configuration of the product?

  • SN1 mechanism
  • SN2 mechanism (correct)
  • Radical substitution
  • Nucleophilic addition

    • What happens during SN1 reactions of optically active alkyl halides?

    <p>The product formed displays racemisation.</p> Signup and view all the answers

    Which of the following statements about optical rotation is true?

    <p>The sign of optical rotation can change in the reaction product despite the same configuration.</p> Signup and view all the answers

    In the context of optical activity, what does it mean if a compound is described as levorotatory?

    <p>It rotates plane-polarized light to the left.</p> Signup and view all the answers

    What typically occurs during the replacement of a leaving group at an asymmetric carbon atom?

    <p>Retention, inversion, or racemisation can result.</p> Signup and view all the answers

    Which of the following correctly predicts the order of reactivity for the given isomeric bromobutanes in SN1 reactions?

    <p>CH3CH2CH2CH2Br &lt; (CH3)2CHCH2Br &lt; CH3CH2CH(Br)CH3 &lt; (CH3)3CBr</p> Signup and view all the answers

    When (–)-2-bromooctane reacts with sodium hydroxide, what type of product is formed?

    <p>An optically active product with inverted configuration.</p> Signup and view all the answers

    What is the reason for the higher reactivity of (CH3)2CHCH2Br compared to CH3CH2CH2CH2Br in SN1 reactions?

    <p>The inductive effect of the isopropyl group increases stability.</p> Signup and view all the answers

    For the following compounds, which one is the least reactive in SN2 reactions?

    <p>C6H5C(CH3)(C6H5)Br</p> Signup and view all the answers

    Which compound is expected to react faster in SN1 reactions based on resonance stabilization?

    <p>C6H5CH(C6H5)Br</p> Signup and view all the answers

    Why does CH3CH2CH(Br)CH3 have lower reactivity in SN2 reactions compared to CH3CH2CH2CH2Br?

    <p>It has higher steric hindrance.</p> Signup and view all the answers

    What is a key factor affecting the reactivity of the given compounds in electrophilic substitution reactions?

    <p>Electronic effects due to resonance.</p> Signup and view all the answers

    Which option describes the relationship between steric hindrance and reactivity in SN2 reactions?

    <p>Less steric hindrance allows for better approach to the electrophilic carbon.</p> Signup and view all the answers

    In the context of nucleophilic substitution reactions, what does racemization refer to?

    <p>Conversion of one enantiomer to another.</p> Signup and view all the answers

    What is the primary characteristic of the inversion of configuration at the carbon atom during a reaction?

    <p>The configuration of the carbon atom flips like an umbrella in the wind.</p> Signup and view all the answers

    Which statement correctly describes the transition state of the SN2 reaction?

    <p>The carbon atom is simultaneously bonded to the nucleophile and the leaving group.</p> Signup and view all the answers

    How does the presence of bulky substituents affect the reactivity of alkyl halides in SN2 reactions?

    <p>It decreases the reactivity due to steric hindrance.</p> Signup and view all the answers

    In what order do alkyl halides react in SN2 reactions, based on steric hindrance?

    <p>Primary halide &gt; Secondary halide &gt; Tertiary halide</p> Signup and view all the answers

    What is a key feature of SN1 reactions regarding the type of solvent used?

    <p>Polar protic solvents enhance the stability of the intermediate.</p> Signup and view all the answers

    What is meant by the term 'configuration' in organic chemistry?

    <p>The spacial arrangement of functional groups around a carbon atom.</p> Signup and view all the answers

    Which type of alkyl halide is expected to be the least reactive in SN2 reactions?

    <p>Tertiary halides</p> Signup and view all the answers

    Which statement about resonance structures is true in the context provided?

    <p>Resonance structures represent different configurations of the same molecule.</p> Signup and view all the answers

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