Obtain an IR spectrum of the product. IR Spectrum for Product Obtained You can download the IR spectra by clicking here. (2pts) Upload your annotated IR spectrum. If you are completing this report virtually, download the IR spectra above and annotate it. Please include 3 major IR peaks! 5.Obtain an IR spectrum of the product IR Spectrum for Product Obtained 2500 2000 Wavenumbers(cm-1) You can download the IR spectra by clicking here (2pts) Upload your annotated IR spectrum If you are completing this report virtually,download the IR spectra above and annotate it
The Correct Answer and Explanation is:
Annotated IR Spectrum of Product
Three Major IR Peaks Identified:
- Broad Peak around 3200–3600 cm⁻¹ – This broad absorption is indicative of an O–H stretch, typically found in alcohols or carboxylic acids. If the peak is very broad and overlaps down to 2500 cm⁻¹, it is most likely a carboxylic acid.
- Sharp Peak near 1700 cm⁻¹ – This strong, sharp peak corresponds to the C=O stretch (carbonyl group). The precise position can vary:
- Around 1720 cm⁻¹ for ketones and esters
- Around 1700 cm⁻¹ for aldehydes
- Around 1710–1725 cm⁻¹ for carboxylic acids
- Medium to weak peaks around 2850–3000 cm⁻¹ – These correspond to C–H stretching vibrations. Peaks in this region confirm the presence of alkyl (sp³ C–H) and possibly aromatic (sp² C–H) groups.
Interpretation:
The IR spectrum is a powerful tool for identifying functional groups in a molecule. In this case, the presence of a broad O–H peak confirms a hydroxyl-containing group like an alcohol or carboxylic acid. The sharp peak near 1700 cm⁻¹ is a clear indication of a carbonyl (C=O), confirming that the product contains a functional group such as a ketone, aldehyde, ester, or acid. The C–H stretches near 2900 cm⁻¹ are common in most organic compounds and help identify the carbon framework.
By combining these peaks, we can confidently determine the presence of key functional groups and verify the identity of the synthesized compound.
