What absorbs at 1729 cm⁻¹ in an FTIR spectrum?
A band near 1729 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
Možná přiřazení funkčních skupin
| Funkční skupina | Podpůrná fakta | Citované zdroje | Nejvyšší spolehlivost |
|---|---|---|---|
| Carbonyl (C=O) | 14 | 12 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Urethane | 1 | 1 | 0,9 |
Pořadí odráží nahromaděné literární důkazy, nikoli jediné autoritativní pravidlo. Vždy potvrďte v kontextu vašeho vzorku.
Literatura za těmito přiřazeními
-
Carbonyl (C=O) spolehlivost 1,0
“Explicit assignment: 'The peak about 1729 cm-1 ... can be assigned to (C=O), the stretching mode of carbonyl groups'.”
Asghari 等 - 2013 - Evaluation of microwave and magnetic properties of DOI: 10.1016/j.matchemphys.2013.08.045 -
Carbonyl (C=O) spolehlivost 1,0
“Carbonyl stretching”
Kavanaugh 等 - 2016 - Human mesenchymal stem cell behavior on segmented DOI: 10.1007/s10856-015-5654-5. -
Ester spolehlivost 1,0
“IR spectrum in KBr showed absorption bands at cm-1 1729, 1288, 1124 due to the presence of ester group.”
Sisay 等 - 2021 - PHYTOCHEMICAL STUDIES OF MELILOTUS OFFICINALIS DOI: 10.4314/bcse.v35i1.12 -
Carbonyl (C=O) spolehlivost 0,9
“Strong peak at 1729 cm-1 assigned to carbonyl group of urethane linkage.”
Jana 等 - 2009 - Molecular Orientation of Polyurethane Based Liquid DOI: 10.1080/10601320903158719 -
Carbonyl (C=O) spolehlivost 0,9
“carbonyl peak”
Razgon 等 - 2008 - Ozonolysis-based route to the in situ formation of DOI: 10.1021/la703120c -
Carbonyl (C=O) spolehlivost 0,9
“Carbonyl functional group C=O stretching represented by band at 1729 cm-1.”
Zulkifli 等 - 2020 - Corrosion Resistance Evaluation of Acrylic Coating DOI: 10.17576/jkukm-2020-32(2)-14 -
Carbonyl (C=O) spolehlivost 0,9
“Explicitly stated: '1729 (carbonyl group C=O)'”
Bahramnia 等 - 2022 - The Effect of 3-(Glycidoloxy Propyl) Trimethoxy Si DOI: 10.21203/rs.3.rs-381518/v1 -
Carbonyl (C=O) spolehlivost 0,9
“Explicit assignment.”
Chalykh 和 Nikulova - 2023 - Effect of Molecular Weight on Phase Equilibrium in DOI: 10.3390/molecules28135259
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