Question

Different functional groups absorb IR radiation at different intensities and different frequencies, and therefore the signal from each group appears in a particular region of the IR spectrum. The absorption frequency for a particular functional group depends on the types of bonds that are present. Characteristic functional group absorptions include:

Answer 1

Different functional groups have different characteristic absorption frequencies in infrared spectroscopy, which can be used to identify the functional groups present in a molecule.

Step-by-step explanation:

The power of infrared spectroscopy arises from the observation that different functional groups have different characteristic absorption frequencies.

For example, the carbonyl bond in a ketone typically absorbs in the range of 5.11 - 5.18 x 10^13 Hz, while the carbon-carbon triple bond of an alkyne absorbs in the range of 6.30 - 6.80 x 10^13 Hz.

This technique is useful for identifying which functional groups are present in a molecule.

By analyzing the absorption frequencies in an IR spectrum, we can infer the presence of specific functional groups in a molecule.