Choose the molecule that is most likely to produce a spectrum with these IR frequencies: v = 2979, 2869, 1126 cm A) butane B) 1-butene C) diethyl ether D) butanoic acid E) 2-butanone
Choose the molecule that is most likely to produce a spectrum with these IR frequencies: v = 2979, 2869, 1126 cm A) butane B) 1-butene C) diethyl ether D) butanoic acid E) 2-butanone
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:**
Choose the molecule that is most likely to produce a spectrum with these IR frequencies:
ν = 2979, 2860, 1126 cm⁻¹
**Options:**
A) butane
B) 1-butene
C) diethyl ether
D) butanoic acid
E) 2-butanone
*Explanation:*
The question is asking for the identification of a molecule based on its infrared (IR) spectrum frequencies. Various functional groups absorb IR radiation at specific frequencies, allowing for the identification of structural features in a molecule.
1. **ν = 2979 cm⁻¹ and ν = 2860 cm⁻¹**: These frequencies typically indicate C-H stretching, common in alkanes, alkenes, and ethers.
2. **ν = 1126 cm⁻¹**: This frequency often matches C-O stretching, characteristic of ethers or esters.
By comparing these frequencies with the molecular options:
- **Diethyl ether (Option C)****: Contains a C-O bond. The ν = 1126 cm⁻¹ for C-O stretching complements this molecule’s structure.
- **Other Options**: While other molecules have C-H bonds, the 1126 cm⁻¹ frequency is key for identifying diethyl ether due to its specific C-O stretch absorption not typically found in alkanes or alkenes without an ester or ether linkage.
Therefore, the most likely answer is C) diethyl ether.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff65fb7b2-ba85-4e67-8fe1-01f97a564d1e%2Fbec0e8d1-5ee0-44b0-9ec4-74e2c86b4fd8%2Fygmn833_processed.png&w=3840&q=75)
Transcribed Image Text:**Question:**
Choose the molecule that is most likely to produce a spectrum with these IR frequencies:
ν = 2979, 2860, 1126 cm⁻¹
**Options:**
A) butane
B) 1-butene
C) diethyl ether
D) butanoic acid
E) 2-butanone
*Explanation:*
The question is asking for the identification of a molecule based on its infrared (IR) spectrum frequencies. Various functional groups absorb IR radiation at specific frequencies, allowing for the identification of structural features in a molecule.
1. **ν = 2979 cm⁻¹ and ν = 2860 cm⁻¹**: These frequencies typically indicate C-H stretching, common in alkanes, alkenes, and ethers.
2. **ν = 1126 cm⁻¹**: This frequency often matches C-O stretching, characteristic of ethers or esters.
By comparing these frequencies with the molecular options:
- **Diethyl ether (Option C)****: Contains a C-O bond. The ν = 1126 cm⁻¹ for C-O stretching complements this molecule’s structure.
- **Other Options**: While other molecules have C-H bonds, the 1126 cm⁻¹ frequency is key for identifying diethyl ether due to its specific C-O stretch absorption not typically found in alkanes or alkenes without an ester or ether linkage.
Therefore, the most likely answer is C) diethyl ether.
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