What absorbs at 2249 cm⁻¹ in an FTIR spectrum?
A band near 2249 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 2 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Alkyl C-H | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Amide confidence 1.0
“cm-1 cm-1 C=O The band located at 2249 and 1739 due to vibration of C-N and groups respectively [33].”
Mondal 等 - 2020 - Anti-Bacterial and Anti-Candidal Activity of Silve DOI: 10.3390/biom10060944 -
Alkyl C-H confidence 1.0
“LLM confirmed rule peak-group candidate”
Characterization and anticancer potential of ferulic acid-loaded chitosan nanoparticles against ME-180 human cervical cancer cell lines DOI: 10.1007/s13204-015-0502-y)
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