Practice Interpreting Ir Spectra: Characteristic Absorption Bands (12.2.2) - Chapter 12: Spectroscopic Identification of Organic Compounds

Practice: Interpreting IR Spectra: Characteristic Absorption Bands

Lesson 12.2.2Spectroscopic Identification of Organic Compounds

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6 sample questions

Question 1.
What is the characteristic absorption range for the O-H bond in alcohols?
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Recall the broader region associated with hydrogen bonding.
Question 2.
What does a peak at 1715 cm⁻¹ suggest in IR spectroscopy?
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Think about compound types that contain a C=O bond.
3Question 3.
What is the range for broad O−H absorption bands in carboxylic acids?
- 3200-3600 cm⁻¹
- 2500-3300 cm⁻¹
- 1700-1750 cm⁻¹
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Think about how the strength of hydrogen bonding affects absorption.
4Question 4.
True or False: IR spectroscopy can accurately determine the molecular formula of a compound.
- True
- False
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Consider what data IR specifically reveals.
Question 5.
You analyze a sample showing peaks at 3400 cm⁻¹, 1710 cm⁻¹, and 700 cm⁻¹. What are the likely functional groups present and what does it suggest about the compound?
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Think about how multiple peaks converge to suggest compound identity.
Question 6.
Given an IR spectrum with broad peaks indicating hydrogen bonding, determine the structural implications for that compound.
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Consider how intermolecular forces influence physical properties.

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