Why does the melting point (70-71) above match neither the enantiomers’ nor the racemate’s? Does it mean that the substance is impure, or perhaps isn’t even ibuprofen at all? (Racemic mixture:75-77C, Enantiomer:52-53C)
Why does the melting point (70-71) above match neither the enantiomers’ nor the racemate’s? Does it mean that the substance is impure, or perhaps isn’t even ibuprofen at all? (Racemic mixture:75-77C, Enantiomer:52-53C)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Why does the melting point (70-71) above match neither the enantiomers’ nor the racemate’s? Does it mean that the substance is impure, or perhaps isn’t even ibuprofen at all? (Racemic mixture:75-77C, Enantiomer:52-53C)
Transcribed Image Text:The image shows the chemical structure of Ibuprofen.
### Structural Description:
- **Benzene Ring:** The central feature of the structure is a benzene ring, which is a six-carbon ring with alternating double bonds, indicating aromaticity.
- **Isobutyl Group:** Attached to the benzene ring is an isobutyl group (a three-carbon chain with the formula CH(CH3)2), connected through a single bond.
- **Propionic Acid Group:** On the opposite side of the benzene ring, another side chain is attached, which includes a propionic acid moiety:
- **Methine (CH):** The first carbon of this chain is a methine group (CH connected to CH3).
- **Carboxylic Acid Group:** This is represented as -COOH, indicating a carbon double-bonded to an oxygen (C=O) and single-bonded to a hydroxyl group (OH).
### Notations:
- **CH3:** Methyl group.
- **OH:** Hydroxyl group.
- **O:** Oxygen in the carboxylic acid group.
This structure represents the active ingredient in many over-the-counter pain relief medications known as Ibuprofen, commonly used for reducing pain, fever, and inflammation.
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