What absorbs at 1794 cm⁻¹ in an FTIR spectrum?
A band near 1794 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 4 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Carbonyl (C=O) | 3 | 2 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 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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Alkyl C-H confidence 1.0
“cm-1, phase valence vibration at 1761 as well as an in-phase cm-1, C═O valence vibration at 1794 corresponding to vibraThe CH modes of pure PEO and P(EO) nLiDFOB (n=8, 10, 2 tions [28].”
Polu 等 - 2015 - Poly(ethylene oxide)-lithium difluoro(oxalato)bora DOI: 10.1007/s11581-015-1474-3 -
Carbonyl (C=O) confidence 1.0
“Explicit assignment: 'carbonyl group at 1794'.”
Green Nanocomposite for the Adsorption of Toxic Dyes Removal from Colored Waters DOI: 10.3390/coatings12121955 -
Amide confidence 1.0
“(i.e., It was evident that the characteristic bands of protein lipase) at 1794 for Amide I and 1457-1437cm´1 forAmideIIwithcharacteristicband1114cm´1 forcoilalphahelix.”
Biodiesel Production by Aspergillus niger Lipase Immobilized on Barium Ferrite Magnetic Nanoparticles DOI: 10.3390/bioengineering3020014 -
Carbonyl (C=O) confidence 0.9
“Explicit: 'FTIR exhibited a peak at 1794 cm-1 confirming the presence of C=O'”
Synthesis of cyclic α-pinane carbonate – a potential monomer for bio-based polymers DOI: 10.1039/d1ra07943c
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