The Structures of the isomers of a given molecular formula having a boiling points of -23 o C and 78 .5 o C are to be drawn. Concept introduction: An isomer is defined as molecules having a same molecular formula but with a different structural arrangement of atoms within the formula. They do not have similar properties and functional group is also differing in their structures. To determine: The Structures of the isomers of a given molecular formula having a boiling points of -23 o C and 78 .5 o C .

Question

Wintergreen from Aspirin: 1. In isolating the salicylic acid, why is it important to press out as much of the water as possible? 2. Write the mechanism of the esterification reaction you did. 3. What characteristic absorption band changes would you expect in the IR spectrum on going from aspirin to salicyclic acid and then to methyl salicylate as you did in the experiment today? Give approximate wavenumbers associated with each functional group change. 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 22, Problem 115AE

Interpretation Introduction

Interpretation: The Structures of the isomers of a given molecular formula having a boiling points of -23oC and 78.5oC are to be drawn.

Concept introduction: An isomer is defined as molecules having a same molecular formula but with a different structural arrangement of atoms within the formula. They do not have similar properties and functional group is also differing in their structures.

To determine: The Structures of the isomers of a given molecular formula having a boiling points of -23oC and 78.5oC .

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