What absorbs at 858 cm⁻¹ in an FTIR spectrum?
A band near 858 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 3 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Alkyl C-H | 3 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| N h | 1 | 1 | 1.0 |
| N-O bond | 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 |
| Lignin | 1 | 0 | 0.9 |
| C-O single bond | 1 | 0 | 0.6 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
C c single bond confidence 1.0
“TheFTIR spectrawere seen to bedominated bya peak at975 for C-Hout ofplane deformation modes alongwith peaks cm(cid:3)1, for C-H bending, C-H stretching and C-C stretching modes at 858, 1113 and 1189 respectively.”
Hussain 和 Pal - 2007 - Synthesis of composite films of mixed Ag-Cu nanocr DOI: 10.1016/j.apsusc.2006.07.074 -
Acetate confidence 1.0
“The other bands are at cm´1, are at 1457, 1430, 1385.6 and 858.17 corresponding to the stretching and bending vibrations of 1457, 1430, 1385.6 and 858.17 cm-1, corresponding to the stretching and bending vibrations of C=O, C=O, H-C-H, C-H a”
Biodiesel Production by Aspergillus niger Lipase Immobilized on Barium Ferrite Magnetic Nanoparticles DOI: 10.3390/bioengineering3020014 -
Alkyl C-H confidence 1.0
“Several other bands and peaks appear at 1386, 1142 and 858 cm-1, each of which is due to the bonding of N 2, aliphatic amine -C-Ngroups and by the C-H group close to nitrogen dioxide (NO 2) [55].”
Lopez-Rodriguez 等 - 2023 - Dyeing with Hydrotalcite Hybrid Nanoclays and Disp DOI: 10.3390/ijms24010808
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