To identify the functional groups present in a given compound using infrared IR spectroscopy, we need to analyze the IR spectrum of the compound. The IR spectrum is a plot of the transmittance or absorbance of infrared radiation by the compound as a function of the wavenumber cm or wavelength m of the radiation. Different functional groups have characteristic absorption bands in the IR spectrum, which can be used to identify them.Here's a step-by-step process to identify the functional groups using the generated IR spectra:1. Obtain the IR spectrum of the compound: To begin, you need to have the IR spectrum of the compound in question. This can be obtained experimentally using an IR spectrometer or from a database of known IR spectra.2. Examine the fingerprint region: The fingerprint region 400-1500 cm contains many overlapping absorption bands that are unique to each compound. Although it is difficult to identify specific functional groups in this region, it can be used to confirm the identity of a compound by comparing it to a known reference spectrum.3. Look for characteristic absorption bands: The most useful region for identifying functional groups is the functional group region 1500-4000 cm . In this region, different functional groups have characteristic absorption bands that can be used to identify them. Some common functional groups and their characteristic absorption bands are: - O-H alcohol or phenol : Broad absorption band around 3200-3600 cm - N-H amine or amide : Medium to strong absorption band around 3300-3500 cm - C=O carbonyl group : Strong absorption band around 1650-1750 cm - C=C alkene : Weak to medium absorption band around 1600-1680 cm - CC alkyne : Medium to strong absorption band around 2100-2260 cm - CN nitrile : Medium to strong absorption band around 2220-2260 cm4. Analyze the absorption bands: Carefully analyze the absorption bands in the functional group region and compare them to the characteristic absorption bands of different functional groups. This will help you identify the functional groups present in the compound.5. Confirm your conclusion: Once you have identified the functional groups, you can confirm your conclusion by comparing the IR spectrum of the compound to the known reference spectra of compounds with similar functional groups.In summary, to identify the functional groups present in a compound using IR spectroscopy, you need to analyze the IR spectrum of the compound, focusing on the functional group region 1500-4000 cm , and compare the absorption bands to the characteristic absorption bands of different functional groups. This will allow you to determine the functional groups present in the compound and confirm your conclusion by comparing the spectrum to known reference spectra.