What absorbs at 2002 cm⁻¹ in an FTIR spectrum?
A band near 2002 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 6 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 0 | 1.0 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Water (H2O) confidence 1.0
“The IR spectrum is largely dominated by the In astrophysical ices, the main component is water (Greenberg strong band related to the OH stretching mode of water, while 2002), allowing a spectral window for AAN detection around cm-1 cm-1 νCN”
Borget 等 - 2012 - Aminoacetonitrile characterization in astrophysica DOI: 10.1051/0004-6361/201218949 -
Alkene (C=C) confidence 1.0
“It is known that all organic materials spectra cm-1 have small peaks at around 2300 - 2400 which are related to the effect of C = N, C = O and N = O double bond stretching vibration (Griffiths and Homes 2002).”
Elwan 等 - 2018 - DOI: 10.5028/jatm.v10.935 -
Acetate confidence 1.0
“48, films, and to the C-O stretch vibrations with bands between (2002)”
Fundo 等 - 2015 - The Effect of PolymerPlasticiser Ratio in Film Fo DOI: 10.1007/s11483-015-9394-3 -
confidence 1.0
“carbonate-richlithology.Duringtheir studies, the Si-O stretch2002, 2003a),its trace elements content (Friedrich et al.”
FTIR and Raman analyses of the Tagish Lake meteorite: Relationship with the aliphatic hydrocarbons observed in the Diffuse Interstellar Medium DOI: 10.1051/0004-6361:20034526 -
C c single bond confidence 1.0
“(2013), Kumar and cles and positive control (streptomycin), but the negative C-C stretching Gupta (2002) and Babu et al.”
Netala 等 - 2015 - First report of biomimetic synthesis of silver nan DOI: 10.1007/s13204-014-0374-6 -
Amide confidence 1.0
“Amide-B band Edem DO (2002) Palm oil: biochemical, physiological, nutritional, illustrated NH-stretching vibration and asymmetric CH-”
Influence of palm oil and glycerol on properties of fish skin gelatin-based films DOI: 10.1007/s13197-016-2243-7
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