Pyridine: Physical Properties & Structure
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Questions and Answers

What is the physical state of pyridine?

  • Colorless gas
  • Colorless liquid
  • Red solid
  • Reddish brown liquid (correct)

    • How many π electrons contribute to the delocalized system in pyridine?

  • 10
  • 4
  • 8
  • 6 (correct)

    • Which orbital does the unshared electron pair on nitrogen in pyridine occupy?

  • $d$ orbital
  • $sp^2$ orbital (correct)
  • $sp^3$ orbital
  • $sp$ orbital

    • What effect does the nitrogen atom in pyridine have via σ bond and π bond?

    <p>+I effect via σ bond and -M effect via π bond</p> Signup and view all the answers

    What is the product of the classical Hantzsch synthesis?

    <p>$1,4$-dihydropyridine</p> Signup and view all the answers

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