Free interactive chemistry · SIM-SPEC-IR-001
Molecular vibration and IR
An infrared spectrum: each band belongs to a bond vibrating.
Open the interactive simulation →How to use this simulation
- Choose a molecule.
- Tap a labelled band to see which bond causes it.
- Compare with the correlation table.
What to notice
- Look above 1500 cm⁻¹ first: O–H, C–H, C≡N and C=O identify functional groups.
- Below 1500 cm⁻¹ is the fingerprint region, unique to each molecule.
Try this
How can you tell an alcohol from a carboxylic acid by IR?
Try it for free →