What absorbs at 2097 cm⁻¹ in an FTIR spectrum?
A band near 2097 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 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Isocyanate | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Isocyanate confidence 1.0
“FTIR at this region makes it difficult to assign all absorption bands, step showed bands corresponding to -N=C=O stretch at 2097 and because of the unique patterns found there, it is often called”
Kishore 等 - 2012 - Immobilization of beta-Galactosidase onto Function DOI: 10.1371/journal.pone.0040708 -
Alkyl C-H confidence 1.0
“cm(cid:3)1 C-H (]C-H) This dominant band in this region is the 2097 band associated corresponds to stretching in the fragment, and withC^Nnitrilegroups.Prolongedexposurefor14-17seconds could be assigned, for instance, to formaldehyde dimeth”
Mechanistic study of 1,1-dimethylhydrazine transformation over Pt/SiO2 catalyst DOI: 10.1039/c8ra07769j
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