What absorbs at 2978 cm⁻¹ in an FTIR spectrum?
A band near 2978 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 8 cited sources
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| Alkyl C-H | 6 | 6 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Bibliographie derrière ces attributions
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Alkyl C-H confiance 1,0
“The bands at 3046 may be assigned to the OH group, while the cm-1 weak bands at 2978 and 2871 could be due to the C-H stretching vibrations which are”
Synthesis, crystal structures, quantum chemical studies and corrosion inhibition potentials of 4-(((4-ethylphenyl)imino)methyl)phenol and (E)-4-((naphthalen-2-ylimino) methyl) phenol Schiff bases DOI: 10.1016/j.molstruc.2017.06.104 -
Alkyl C-H confiance 1,0
“They (C-H stretching reported that the frequencies of allicin in FTIR spectra were 3083 cm-1 2), 2978 cm-1 (C-H stretching symmetric of =CH 2),1634 cm-1 (a medium asymmetric of =CH”
Tasci 等 - 2016 - Determination of alliin and allicin in the plant o DOI: 10.17660/ActaHortic.2016.1143.19 -
Alkyl C-H confiance 1,0
“(cid:0)1 peak at 2978 cm is assigned to the CH stretching The transport of the produced smoke out of the vibrations of the CH group [30,31].”
Adeniyi 等 - 2022 - Evaluating the nature of captured exhaust soot fro DOI: 10.24200/sci.2021.57008.5017 -
Alkyl C-H confiance 1,0
“cm-1 The vibrational peaks at 2978 assigned to -CH symmetric and asymmetric vibrations of typical polysachaaride have been disappeared on adding the salt.”
Helen 等 - 2023 - Amelioration of ionic conductivity (303 K) with th DOI: 10.21203/rs.3.rs-1557220/v1 -
Alkyl C-H confiance 1,0
“LLM confirmed rule peak-group candidate”
Jaleh 等 - 2015 - Characteristics of PVDF Membranes Irradiated by El DOI: 10.3390/membranes5010001 -
Hydroxyl (O-H) confiance 1,0
“also the case for pure EMIMOAc in which there was a strong 3070cm-1 ]O-H 2800 and the region compared to autopeak at 2978cm-1 2900 a reduced prominence of the peak.”
Kathirgamanathan 等 - 2015 - Two-Dimensional FTIR as a Tool to Study the Chemic DOI: 10.1155/2015/958653 -
Alkyl C-H confiance 1,0
“between 2978 and 2956 The band related to the asymmetric stretching vibrations of the cm-1 CH aliphatic groups exhibits a maximum in the range from 2930 to 2922 in the analyzed 2 cm-1, samples.”
Komorek - 2016 - INTERNAL STRUCTURE OF VITRIINTITE AND SPORINITE IN DOI: 10.1515/amsc-2016-0050 -
Aromatic ring confiance 1,0
“It is interesting to note the C\\H cm-1 bands at 2978 and 2933 absence of signal for aromatic protons when aromatic rings are correspond to asymmetric stretch actually constituents of lignin structure.”
Comprehensive characterization of industrial wastewaters using EEM fluorescence, FT-IR and 1H NMR techniques DOI: 10.1016/j.scitotenv.2021.150417
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