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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
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
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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.
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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