What absorbs at 1792 cm⁻¹ in an FTIR spectrum?

Quick answer

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.

가능한 작용기 할당

순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.

Spectrum logic

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.

Real-world usage

This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.

Common mistakes

• Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
• Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
• Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.

Verification advice

When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.

이 할당의 배경이 되는 문헌

• Adsorbed carbon monoxide 신뢰도 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 신뢰도 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) 신뢰도 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) 신뢰도 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
• 신뢰도 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 신뢰도 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