FTIR PEAK INTERPRETATION
What absorbs at 718 cm⁻¹ in an FTIR spectrum?
A band near 718 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 | 4 | 0 | 1.0 |
| Alkene (C=C) | 1 | 1 | 0.9 |
| Carbonate | 1 | 1 | 0.8 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Alkene (C=C) confidence 0.9
“=C-H bending vibration”
Perera 等 - 2021 - Decaying Hardwood Associated Fungi Showing Signatu DOI: 10.1007/s13205-017-0699-4. -
Carbonate confidence 0.8
“Characteristic vibration band of CO3^2-.”
Chavez Portillo 等 - 2014 - Shapeand size controlled synthesis of CdCO3 in s DOI: 10.1016/j.matlet.2014.01.042
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