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Questions and Answers
Which type of substitution reactions do furan, thiophene, and pyrrole undergo?
Which of the following is a basic property of pyrrole?
Which statement about the aromatic character of these five-membered heterocycles is correct?
Which atom in furan and thiophene is sp2 hybridized?
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What is the color of the polymeric product known as pyrrole red?
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Polymeric product known as pyrrole red is formed in __________ solutions
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Pyrrole has a weak __________ property
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Furan, thiophene and pyrrole undergo electrophilic substitution at the 𝛼- (2- ) __________
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The oxygen atom in furan and the sulphur atom in thiophene are __________ hybridized
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Pyrrole in dilute acids forms a trimer and in concentrated solutions it polymerizes to a dark colored polymeric product known as __________
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Study Notes
Heterocycles: Furan, Thiophene, and Pyrrole
- Furan, thiophene, and pyrrole undergo electrophilic substitution reactions.
- Pyrrole has a basic property, which is being weakly basic.
Aromatic Character
- The correct statement about the aromatic character of these five-membered heterocycles is that they exhibit aromatic character.
Hybridization
- In furan and thiophene, the oxygen and sulfur atoms, respectively, are sp2 hybridized.
Pyrrole Red
- Pyrrole red is a dark-colored polymeric product formed in acidic solutions.
- Pyrrole has a weak acidic property.
Substitution Reactions
- Furan, thiophene, and pyrrole undergo electrophilic substitution at the 𝛼- (2-) position.
Acidic Reactions
- Pyrrole in dilute acids forms a trimer and in concentrated solutions, it polymerizes to form pyrrole red.
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Description
Test your knowledge of pharmaceutical organic chemistry with a focus on heterocyclic chemistry. This quiz covers topics relevant to clinical PharmD students at a level 2 proficiency.
