The structural formula for the given compound A has to be proposed along with the mechanism for the formation of the given tricyclic product. Concept Introduction: Diazotisation: It is the formation of diazonium salt from the reaction between a secondary amine such as aniline and sodium nitrite in acidic medium. Diels-Alder reaction: It is the reaction of conjugated dienes with double or triple bonded compounds which are known as “dienophiles” . The reaction is a 4 + 2 cycloaddition reaction that results in the formation of a six membered cyclic product which is known as “adduct” . Example: Diels-Alder reaction to form bicyclic system: The Diels-Alder adduct formed in the Diels-Alder reaction can also be a bicyclic system which will be obtained when cylopentadiene is used as the diene as shown here: In this reaction, the cylopentadiene acts as both diene and dienophile and formed a bicyclic system. When it is heated to 170 o C , a reverse Diels-Alder reaction takes place in which the bicyclic system will be decomposed and gives back the cylopentadiene.

Question

The U. S. Environmental Protection Agency (EPA) sets limits on healthful levels of air pollutants. The maximum level that the EPA considers safe for lead air pollution is 1.5 μg/m³ Part A If your lungs were filled with air containing this level of lead, how many lead atoms would be in your lungs? (Assume a total lung volume of 5.40 L.) ΜΕ ΑΣΦ = 2.35 1013 ? atoms ! Check your rounding. Your final answer should be rounded to 2 significant figures in the last step. No credit lost. Try again.

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Question

Chapter 20, Problem 20.43P

Interpretation Introduction

Interpretation:

The structural formula for the given compound A has to be proposed along with the mechanism for the formation of the given tricyclic product.

Concept Introduction:

Diazotisation:

It is the formation of diazonium salt from the reaction between a secondary amine such as aniline and sodium nitrite in acidic medium.

Diels-Alder reaction:

It is the reaction of conjugated dienes with double or triple bonded compounds which are known as “dienophiles”. The reaction is a 4+2 cycloaddition reaction that results in the formation of a six membered cyclic product which is known as “adduct”.

Example:

Diels-Alder reaction to form bicyclic system:

The Diels-Alder adduct formed in the Diels-Alder reaction can also be a bicyclic system which will be obtained when cylopentadiene is used as the diene as shown here:

In this reaction, the cylopentadiene acts as both diene and dienophile and formed a bicyclic system. When it is heated to 170o C, a reverse Diels-Alder reaction takes place in which the bicyclic system will be decomposed and gives back the cylopentadiene.

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