Organic chemistryLesson 2 of 3 in the course Aromatic compounds

Benzene: Structure, Industrial Chemistry, Reactions, and Toxicology

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

Benzene is a small molecule with an unusually stable ring structure and an important place in organic chemistry. This lesson introduces its formula, geometry, bonding, and classification.

Benzene has the molecular formula C6H6. Its six carbon atoms form a flat, hexagonal ring, and each carbon is attached to one hydrogen atom. Because it contains only carbon and hydrogen, benzene is a hydrocarbon.

All flashcards

What is benzene’s molecular formula?
C6H6: six carbon atoms and six hydrogen atoms.
What does delocalization mean in benzene?
The pi electrons are shared across the ring rather than being confined to particular carbon–carbon bonds.
What does toluene disproportionation produce?
Benzene and xylene.
Which urinary metabolites can be measured to assess benzene exposure?
Muconic acid and phenylmercapturic acid.
Why is benzene a serious health hazard?
It is a known human carcinogen associated with blood and bone-marrow disorders.

Quiz questions

  1. What occurs during catalytic reforming of aliphatic hydrocarbons?Answer: They are converted into aromatic compounds.
  2. What group does Friedel–Crafts acylation introduce onto a benzene ring?Answer: An acyl group
  3. What product forms when benzene is hydrogenated under suitable conditions?Answer: Cyclohexane
  4. What did Kathleen Lonsdale’s 1929 X-ray work establish about benzene?Answer: It has a flat hexagonal arrangement with equal carbon–carbon bonds.
  5. What is OSHA’s permissible benzene exposure limit averaged over an 8-hour workday in the United States?Answer: 1 ppm

Based on the Wikipedia article Benzene, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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