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3.11. What is the importance of 3000 cm-1? a. This is the frequency of the natural harmonic of the mysterious musical note B# and is also the genesis of the name of André 3000. b. This is the wavenumber on an IR spectra that indicates the presence of a terminal alkyne C-H stretch. c. This is the wavenumber on an IR spectra that divides C-H bonds from sp3 carbons versus those from sp/sp? carbons. d. This is the narrow frequency of C=O bond stretching in molecules at room temperature. e. This is the single wavelength of a C-H bond stretch in an IR spectra.

3.11. What is the importance of 3000 cm-1? a. This is the frequency of the natural harmonic of the mysterious musical note B# and is also the genesis of the name of André 3000. b. This is the wavenumber on an IR spectra that indicates the presence of a terminal alkyne C-H stretch. c. This is the wavenumber on an IR spectra that divides C-H bonds from sp3 carbons versus those from sp/sp? carbons. d. This is the narrow frequency of C=O bond stretching in molecules at room temperature. e. This is the single wavelength of a C-H bond stretch in an IR spectra.

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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3.11. What is the importance of 3000 cm-1? This is the frequency of the natural harmonic of the mysterious musical note B# and is also the genesis of the name of André 3000. b. This is the wavenumber on an IR spectra that indicates the presence of a terminal alkyne C-H stretch. This is the wavenumber on an IR spectra that divides C-H bonds from sp3 carbons versus those from splsp? carbons. d. This is the narrow frequency of C=O bond stretching in molecules at room temperature. This is the single wavelength of a C-H bond stretch in an IR spectra. a. с. е.
Transcribed Image Text:3.11. What is the importance of 3000 cm-1? This is the frequency of the natural harmonic of the mysterious musical note B# and is also the genesis of the name of André 3000. b. This is the wavenumber on an IR spectra that indicates the presence of a terminal alkyne C-H stretch. This is the wavenumber on an IR spectra that divides C-H bonds from sp3 carbons versus those from splsp? carbons. d. This is the narrow frequency of C=O bond stretching in molecules at room temperature. This is the single wavelength of a C-H bond stretch in an IR spectra. a. с. е.
3.12. Which functional group(s) would you confidently predict in a pure sample of an organic molecule that produces the following IR bands (cm-1): 2923, 1667, 1245, 1054? a. alcohol, aldehyde, alkane b. aldehyde, benzene, ester c. aldehyde, ketone, ether d. carboxylic acid, alcohol, alkane e. carbonyl, ester, alkane
Transcribed Image Text:3.12. Which functional group(s) would you confidently predict in a pure sample of an organic molecule that produces the following IR bands (cm-1): 2923, 1667, 1245, 1054? a. alcohol, aldehyde, alkane b. aldehyde, benzene, ester c. aldehyde, ketone, ether d. carboxylic acid, alcohol, alkane e. carbonyl, ester, alkane
Expert Solution
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For question 1

Option 3 is correct as medium appearance at 3000 to 3100cm-1 indicates the alkene C-H stretching.

Little higher to that like 3300 will show C-H stretching for alkynes.

But for alkane C-H stretching can be visible at 3000-2800cm-1

 

3000cm-1 differentiates the alkanes with saturated C-H stretching.

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