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Questions and Answers
Which molecule exhibits IR stretches at 2700 and 2800 cm-1?
Which molecule exhibits IR stretches at 2700 and 2800 cm-1?
c) CH3CH2CO2CH3
What type of species is produced when a high energy electron impacts molecule M in the ionization chamber?
What type of species is produced when a high energy electron impacts molecule M in the ionization chamber?
D) radical cation
Among the given compounds, which exhibits a carbonyl bond absorption at the lowest frequency?
Among the given compounds, which exhibits a carbonyl bond absorption at the lowest frequency?
1
Which compound shows characteristic IR stretches at 3300 and 2200 cm-1?
Which compound shows characteristic IR stretches at 3300 and 2200 cm-1?
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Identify the compound that does not have broad absorption centered at 3300 cm-1.
Identify the compound that does not have broad absorption centered at 3300 cm-1.
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Which compound is expected to show intense IR absorption at 1680 cm-1?
Which compound is expected to show intense IR absorption at 1680 cm-1?
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Which structure corresponds with the provided IR spectra?
Which structure corresponds with the provided IR spectra?
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Which molecule is expected to have the lowest frequency carbonyl stretch?
Which molecule is expected to have the lowest frequency carbonyl stretch?
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Study Notes
Quiz on Chapter 12 - Infrared Spectroscopy
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Question 1: The molecule (CH3CH2CH2CHO) exhibits characteristic stretches at 2700 and 2800 cm-1, in addition to a carbonyl stretch.
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Question 2: A high-energy electron impacting a molecule in an ionization chamber initially produces a radical cation.
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Question 3: Of the compounds listed, Compound 3 (structure) gives the lowest frequency carbonyl bond absorption.
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Question 4: Compound C) (CH3)2CHCN exhibits IR stretches at 3300 and 2200 cm-1.
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Question 5: CH3CH2CH2CH2NH2 does not exhibit a broad absorption centered around 3300 cm-1 typical of amines.
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Question 6: Compound A (structure) featuring a C=O (carbonyl) group would be expected to show an intense IR absorption at 1680 cm-1.
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Question 7 (Multiple Choice): The correct structure is needed to be determined but the correct molecule is dependent on the IR spectrum provided in the question. Review the IR spectrum of the compound to find the correct structure.
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Question 8: (CH3CH2)2CO (di-ethyl ketone) displays the lowest frequency carbonyl stretch among the provided molecules.
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Question 9: The provided image is needed to identify the compound with the lowest carbonyl stretching frequency.
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Question 10 (Multiple Choice): Compound 3 (structure) containing an alcohol (OH) group displays peaks in the stated ranges.
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Description
Test your knowledge on infrared spectroscopy with this quiz focused on Chapter 12. Explore key concepts such as characteristic IR stretches, carbonyl bonds, and compound identification. Enhance your understanding of the material presented in this chapter.
