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Choose the molecule that is most likely to produce a spectrum with these IR frequencies: v = 2979, 2869, 1126 cm 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 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
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 19 of 21** Choose the molecule that is most likely to produce a spectrum with these IR frequencies: ν = 2979, 2869, 1126 cm⁻¹ - A) 2-butanone - B) 1-butene - C) diethyl ether - D) butanoic acid - E) 2-butanone (appears again, likely a repetition) **Explanation:** The question provides specific infrared (IR) frequencies and asks you to identify which molecule's IR spectrum would likely exhibit these frequencies. **Analysis of Frequencies:** - **2979 cm⁻¹ and 2869 cm⁻¹:** These frequencies typically indicate C-H stretching vibrations found in alkanes or alkyl groups. - **1126 cm⁻¹:** This frequency is often associated with C-O stretching, particularly in ethers. **Consideration of Molecules:** - **2-butanone:** A ketone that might show C=O stretches around 1700 cm⁻¹, not fitting these given frequencies. - **1-butene:** An alkene with characteristic C=C stretches around 1600 cm⁻¹, not fitting perfectly with those frequencies. - **Diethyl ether:** Contains C-O-C linkages, which can show absorption around 1126 cm⁻¹. It also has alkyl C-H stretches fitting the higher frequencies. - **Butanoic acid:** Would show O-H and C=O stretches outside of the given frequencies, around 2500-3300 cm⁻¹ and 1700 cm⁻¹ respectively. **Conclusion:** Based on the given IR frequencies, **C) diethyl ether** is the most likely candidate to produce a spectrum present with these specific IR peaks.
Transcribed Image Text:**Question 19 of 21** Choose the molecule that is most likely to produce a spectrum with these IR frequencies: ν = 2979, 2869, 1126 cm⁻¹ - A) 2-butanone - B) 1-butene - C) diethyl ether - D) butanoic acid - E) 2-butanone (appears again, likely a repetition) **Explanation:** The question provides specific infrared (IR) frequencies and asks you to identify which molecule's IR spectrum would likely exhibit these frequencies. **Analysis of Frequencies:** - **2979 cm⁻¹ and 2869 cm⁻¹:** These frequencies typically indicate C-H stretching vibrations found in alkanes or alkyl groups. - **1126 cm⁻¹:** This frequency is often associated with C-O stretching, particularly in ethers. **Consideration of Molecules:** - **2-butanone:** A ketone that might show C=O stretches around 1700 cm⁻¹, not fitting these given frequencies. - **1-butene:** An alkene with characteristic C=C stretches around 1600 cm⁻¹, not fitting perfectly with those frequencies. - **Diethyl ether:** Contains C-O-C linkages, which can show absorption around 1126 cm⁻¹. It also has alkyl C-H stretches fitting the higher frequencies. - **Butanoic acid:** Would show O-H and C=O stretches outside of the given frequencies, around 2500-3300 cm⁻¹ and 1700 cm⁻¹ respectively. **Conclusion:** Based on the given IR frequencies, **C) diethyl ether** is the most likely candidate to produce a spectrum present with these specific IR peaks.
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