Intensities of Functional Groups
- UCSC IR Tables,|Latest
2025/2026 Exam Update|
Lecture notes of Organic
Chemistry|Graded A+|Reliable
A+ Certified Pass
Alcohol IR Spectrum - ANSWERS-The O-H bond in an alcohol absorbs at a higher
wavenumber than it does in an acid - somewhere between 3230 - 3550 cm-1
Alcohol O-H 3650-3200 cm-1
Usually strong and broad
Aldehyde IR Spectrum - ANSWERS-ZONE 2: 3200-2700 cm-1
~2900 and ~2700
Medium; two peaks
ZONE 4: 1850-1650 cm-1
Aldehyde C=O 1740-1720