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Which of

Which of

Chemistry
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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**Question:** Which of the four compounds is best represented by the infrared spectrum shown below? **Infrared Spectrum Analysis:** The infrared spectrum displays several important peaks: - A broad peak around 3400 cm⁻¹ suggests the presence of an O-H group. - A strong sharp peak near 1700 cm⁻¹ indicates a C=O (carbonyl) group. **Compounds for Consideration:** - **Compound A**: Phenol with an OH group attached to a benzene ring. - **Compound B**: An unsaturated aldehyde with a carbonyl group. - **Compound C**: A cyclic ketone with a carbonyl group. - **Compound D**: A cyclic ether. **Explanation:** Based on the spectrum data: - The broad peak around 3400 cm⁻¹ aligns with an OH group, indicating an alcohol. - The strong peak at 1700 cm⁻¹ is consistent with a C=O bond, typical for carbonyl compounds. **Conclusion:** The spectrum suggests that the best match, considering both the OH and C=O peaks, is **Compound A** (phenol with an OH group). This compound's structure includes both an OH group and can account for the observed infrared features.
Transcribed Image Text:**Question:** Which of the four compounds is best represented by the infrared spectrum shown below? **Infrared Spectrum Analysis:** The infrared spectrum displays several important peaks: - A broad peak around 3400 cm⁻¹ suggests the presence of an O-H group. - A strong sharp peak near 1700 cm⁻¹ indicates a C=O (carbonyl) group. **Compounds for Consideration:** - **Compound A**: Phenol with an OH group attached to a benzene ring. - **Compound B**: An unsaturated aldehyde with a carbonyl group. - **Compound C**: A cyclic ketone with a carbonyl group. - **Compound D**: A cyclic ether. **Explanation:** Based on the spectrum data: - The broad peak around 3400 cm⁻¹ aligns with an OH group, indicating an alcohol. - The strong peak at 1700 cm⁻¹ is consistent with a C=O bond, typical for carbonyl compounds. **Conclusion:** The spectrum suggests that the best match, considering both the OH and C=O peaks, is **Compound A** (phenol with an OH group). This compound's structure includes both an OH group and can account for the observed infrared features.
Expert Solution
Step 1 IR spectroscopy

 

  • It is used to identify functional groups present in organic compounds
  • IR functional group frequency range 667-4000 cm-1
  • Finger print frequency range 910-1430 cm-1
  • Types of IR vibrations     

           a. Stretching vibration 

           b. bending vibrations

 

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