5. Textbook question 4.11: Why don\'t aromatic gases (e.g. toluene), emitted int

Question

5. Textbook question 4.11: Why don't aromatic gases (e.g. toluene), emitted into urban air, reach the stratosphere to produce ozone?(' 6. The oxidation of hydrocarbons, specifically saturated hydrocarbons such as alkanes, proceeds in a general fashion I outlined in class, and showed exemplary for methane and ethane. Produce an analogous series of reactions (aka the reaction mechanism) for the atmospheric oxidation of n-butane. What dominant (first non-radical) product do you expect to be formed? What is the net reaction?

Explanation / Answer

1.Aromatic gases have low toxicity and are easily dispersed in air.

They are emitted in low concentrations.

Hence they are unable to keep their true form in order to reach Stratosphere.

2. C4H10 + O2 --> C4H9 + H2O

  C4H10 + OH -->  C4H9 + H2O

  C4H9  + O2 --> C4H9O2 (First dominant non radical product)

  C4H8+ O2 --> C4H7 + H2O

These reactions will go on in this manner. The number of combinations are more.

The net reaction will cancel out most of the terms and we will be getting CO2 + CO + H2O

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