Organic Chemistry Chapter on Effects and Acidity
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Organic Chemistry Chapter on Effects and Acidity

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Questions and Answers

Which functional group is known to show the -I effect?

  • -CH2R
  • -COOH (correct)
  • -CHR2
  • -C2H5
  • What is the phenomenon called when electrons of a multiple bond are displaced by a reagent?

  • M effect
  • E effect
  • I effect (correct)
  • R effect
  • Which compound listed is considered the strongest acid?

  • BrCH2COOH
  • FCH2COOH (correct)
  • CICH2COOH
  • ICH2COOH
  • What type of species is formed from the homolytic fission of a C-C bond?

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    Which of the following is NOT correct regarding the -M and -I effects?

    <p>-M effect is always operational in aromatic compounds.</p> Signup and view all the answers

    Study Notes

    I Effect and Electron Displacement

    • The -I (inductive) effect results from the electron-withdrawing nature of substituents, which stabilize negative charges in a molecule.
    • The substituent -COOH shows the -I effect due to its electronegative characteristics.
    • Other groups such as -C2H5, -CHR2, and -CH2R exhibit weaker or no -I effects.

    Displacement of Electrons

    • The displacement of electrons from a multiple bond when influenced by a reagent is known as the -M (mesomeric) effect.
    • Understanding the types of effects (I, M, E, R) is crucial in predicting molecular behaviors and stability.

    Strength of Acids

    • Among the compounds listed (CICH2COOH, FCH2COOH, BrCH2COOH, ICH2COOH), the strongest acid is typically characterized by the most electronegative substituent, which enhances the acidity through stronger electron withdrawal.
    • The presence of fluorine in FCH2COOH makes it a significantly stronger acid compared to the others.

    Homolytic Fission of C-C Bonds

    • Homolytic fission refers to the breaking of a bond where each atom retains one of the bonded electrons, resulting in free radical formation.
    • When C-C bonds undergo homolytic fission, it leads predominantly to the generation of free radicals, impacting the reactivity and stability of the given compounds.

    Key Concepts in Organic Chemistry

    • Recognizing the inductive and mesomeric effects is essential for predicting how different groups influence reactivity and acidity in organic compounds.
    • The understanding of radical formation from bond fission is fundamental in organic reaction mechanisms.

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    Description

    This quiz covers key concepts in organic chemistry, focusing on the inductive and mesomeric effects in molecular stability and behavior. It analyzes how different substituents influence acidity and electron displacement. Test your understanding of acid strength and electron effects in various compounds.

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