Chemistry CCEA AS Level 2.7 (Infrared Spectroscopy)

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10 Terms

1
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What is infrared spectroscopy used for?

To identify functional groups within an organic compound

2
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How does it work?

When organic molecules absorb infrared radiation it causes covalent bonds in the molecules to vibrate

3
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What affects the amount of vibration?

The strength and length of the covalent bond as well as the mass of atoms involved in the bond

4
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What do each of the peaks on an infrared spectrum represent?

A particular bond

5
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How is an alcohol identified?

From the absorption peak of an O-H bond

6
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How are aldehydes or ketones identified?

From the absorption peak of a C=O bond

7
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How is a carboxylic acid identified?

From the absorption peak of a C=O bond and the broad absorption peak of an O-H bond

8
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How is a halogenoalkane identified?

From the absorption peak of a C-X bond

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How is an amine identified?

From the absorption peak of a N-H bond and a C-N bond

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How is an alkane or an alkene identified?

From the absorption peak of a C-C bond or a C=C bond