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Questions and Answers
Infrared spectroscopy is used to determine what characteristic of organic compounds?
functional groups
What happens to the vibrational motions of bonds in a molecule when they absorb infrared radiation?
They vibrate faster
What is the analogy used to describe the behavior of bonds in a molecule when they absorb energy?
Tiny springs connecting the atoms
What is directly related to the functional groups present in a molecule, making it useful in determining functional groups in organic compounds?
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What type of electromagnetic radiation is absorbed by a molecule in the infrared frequency range?
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Study Notes
Infrared Spectroscopy
- Infrared (IR) frequency range of electromagnetic radiation is absorbed by molecules at certain characteristic frequencies.
Effects of Infrared Radiation on Molecules
- Energy is absorbed by bonds in a molecule, causing them to vibrate faster.
- Bonds behave like tiny springs connecting atoms, absorbing energy and vibrating faster when added energy is of a particular frequency.
Characteristics of Infrared Absorption
- Frequencies of absorption are very characteristic of the type of bonds contained in the sample molecule.
- The type of bonds present are directly related to the functional groups present in the molecule.
Application of Infrared Spectroscopy
- Infrared spectroscopy is used to determine functional groups available in organic compounds.
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Description
Test your knowledge of infrared spectroscopy with this quiz. Learn about the effects of infrared radiation on molecular bonds and how to match an infrared spectrum to an organic compound. Gain a deeper understanding of infrared spectroscopy as an instrumental method for detecting functional groups in molecules.
