The discovery of USS Monitor during the Civil war and the use of sacrificial anode to prevent the corrosion of metal hull of the Monitor is given. The process by which attachment of Zinc to the hull would protect the Monitor from further corrosion is to be stated. Concept introduction: The corrosion is a process that involves the deterioration of metal surface in the process of moisture and oxygen. Applying the coating of more reactive metal over the less reactive metal prevents the metal to undergo corrosion. To determine: The process by which attachment of Zinc to the hull would protect the Monitor from further corrosion.

Question

Synthesis of Ibuprofen-Part 2: 1. Some pain relievers including ibuprofen (MotrinⓇ) and naproxen (Aleve®) are "α-arylpropanoic acids." Look up the structure of naproxen (AleveⓇ), another a-arylpropionic acid. Using the same reactions that we used for making ibuprofen, show how to make naproxen from the compound below. Show all intermediates and reagents in your synthesis. Show how you would prepare ibuprofen starting from p-isobutylbenzene rather than p-isobutylacetophenenone. What reaction steps would need to change/add? 3. What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What other impurities are present in your product and how do you know?

Answer 1

Question

Chapter 18, Problem 120AE

Interpretation Introduction

Interpretation:

The discovery of USS Monitor during the Civil war and the use of sacrificial anode to prevent the corrosion of metal hull of the Monitor is given. The process by which attachment of Zinc to the hull would protect the Monitor from further corrosion is to be stated.

Concept introduction:

The corrosion is a process that involves the deterioration of metal surface in the process of moisture and oxygen. Applying the coating of more reactive metal over the less reactive metal prevents the metal to undergo corrosion.

To determine: The process by which attachment of Zinc to the hull would protect the Monitor from further corrosion.

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Synthesis of Ibuprofen-Part 2: 1. Some pain relievers including ibuprofen (MotrinⓇ) and naproxen (Aleve®) are "α-arylpropanoic acids." Look up the structure of naproxen (AleveⓇ), another a-arylpropionic acid. Using the same reactions that we used for making ibuprofen, show how to make naproxen from the compound below. Show all intermediates and reagents in your synthesis. Show how you would prepare ibuprofen starting from p-isobutylbenzene rather than p-isobutylacetophenenone. What reaction steps would need to change/add? 3. What signals appeared/disappeared/shifted that indicate that you have your intended product and not starting material? What other impurities are present in your product and how do you know?

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