What absorbs at 3647 cm⁻¹ in an FTIR spectrum?
A band near 3647 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 1 cited source
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Alkyl C-H | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 0 | 1.0 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
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Acetate confidence 1.0
“(m percent The mass loss under the first decomposition OH)], ketone (mainly cyclohexanone), acids and anhycm-1 %G (m stage decreased as the was increased, the mass loss dride fragments [bands at 3647 OH), cm-1 cm-1 (m (d under the second de”
The effect of starch-g-copolymers structure on the oxidative behavior studied by the TG/DSC/FTIR-coupled method DOI: 10.1007/s10973-017-6182-y
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