In IR spectroscopy, what does a broad peak around 3200-3600 cm-1 typically indicate?
Practice Questions
1 question
Q1
In IR spectroscopy, what does a broad peak around 3200-3600 cm-1 typically indicate?
Alkane C-H stretch
Aromatic C=C stretch
O-H stretch in alcohols
C=O stretch in ketones
A broad peak in this region typically indicates the presence of O-H stretching vibrations in alcohols or phenols.
Questions & Step-by-step Solutions
1 item
Q
Q: In IR spectroscopy, what does a broad peak around 3200-3600 cm-1 typically indicate?
Solution: A broad peak in this region typically indicates the presence of O-H stretching vibrations in alcohols or phenols.
Steps: 5
Step 1: Understand what IR spectroscopy is. It is a technique used to identify functional groups in molecules by measuring how they absorb infrared light.
Step 2: Know that different functional groups absorb infrared light at different wavelengths, measured in cm-1.
Step 3: Recognize that a broad peak in the range of 3200-3600 cm-1 is significant.
Step 4: Identify that this specific range is associated with O-H (hydroxyl) stretching vibrations.
Step 5: Conclude that the presence of a broad peak in this range typically indicates that the sample contains alcohols or phenols, which have O-H groups.
