What absorbs at 1792 cm⁻¹ in an FTIR spectrum?
A band near 1792 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 6 cited sources
Hurtigt svar
A band near 1792 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Adsorbed carbon monoxide | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 0,7 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Spektrumlogik
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1792 cm⁻¹ is usually not enough for material identification by itself.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
Adsorbed carbon monoxide tillid 1,0
“and 1908 The new spectrum features two bands of equal ESI.† tion states are given in the CNintensity in the region generally associated with at 2078 cm-1, and 2036 four new signals in the terminal CO region at cm-1 2005 (w), 1984 (s), 1953”
Esmieu 等 - 2019 - Synthesis of a miniaturized [FeFe] hydrogenase mod DOI: 10.1039/c8dt05085f -
Alkyl C-H tillid 1,0
“Several bands at 1792, 1749, to the stretching CH vibrations from evolved formic acid [67].”
Structural and Thermal Investigations of Co(II) and Ni(II) Coordination Polymers Based on biphenyl-4,4'-dioxydiacetate Linker DOI: 10.3390/ma14133545 -
Carboxyl (COOH) tillid 1,0
“The peak at 1792 cm-1 (C=O bond, wathet blue line) increased, showing the formation of trifluoroacetic acid.”
A Novel Synthesis of 4-Acetoxyl 5(4H)-Oxazolones by Direct -Oxidation of N-Benzoyl Amino-Acid Using Hypervalent Iodine DOI: 10.3390/molecules22071102 -
Hydroxyl (O-H) tillid 1,0
“Among the residual phases, cm-1, waste rubber has an obvious medium infrared absorption at 2515 corresponding to cm-1 the strong absorption at 1792 that always exists, which can be judged to be attributed to the deviation of O-H stretching”
Comprehensive Estimation of Combustion Behavior and Thermochemical Structure Evolution of Four Typical Industrial Polymeric Wastes DOI: 10.3390/en15072487 -
tillid 0,9
“Text: 'Vibrational assignments around 870, 1395, 1465, and 1792 corresponded to CO ions'”
Radulescu 等 - 2019 - Seasonal Variability in the Composition of Particu DOI: 10.3390/atmos10100595 -
Carbohydrate tillid 0,7
“Text: 'This band is denoted for hemicellulose of O-H bending' and 'IR peak of 1791.93 from the ordinary'”
Effect of microwave assisted alkali pretreatment and other pretreatment methods on some properties of bamboo fibre reinforced cement composites DOI: 10.1016/j.conbuildmat.2020.118405
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