Ask AI: Identify the C=O bond IR benzaldehyde

To identify the carbonyl (C=O) stretch in the IR spectrum of benzaldehyde, you should look for a strong, sharp absorption band. For benzaldehyde, this band typically appears in the range of 1700-1725 cm⁻¹. Here are the steps to identify it: 1. **Obtain the IR Spectrum**: Ensure you have the IR spectrum of benzaldehyde. 2. **Locate the Characteristic Peak**: Look for a prominent peak within the 1700-1725 cm⁻¹ range. 3. **Interpret the Peak**: Verify that this peak represents the C=O stretching vibration, which is generally very strong and sharp due to the polar nature of the carbon-oxygen double bond. In most cases, for benzaldehyde specifically, you will likely see the carbonyl stretch closer to 1700 cm⁻¹. Keep in mind that the exact position can be influenced by conjugation and substituents, but for benzaldehyde, it will predominantly reside in this general region.