What absorbs at 2251 cm⁻¹ in an FTIR spectrum?
A band near 2251 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
可能的官能基指派
| 官能基 | 支持事實 | 引用來源 | 最高信心 |
|---|---|---|---|
| Methyl | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| N c o | 1 | 1 | 1.0 |
排名反映累積的文獻證據，而非單一權威規則。請務必根據您的樣品背景進行確認。
這些指派背後的文獻
-
N c o 信心 1.0
“Deep analysis of such a band allows for distinguishing the cm-1 the band at 2251 as characteristic for the stretching vibrations of NCO moieties.”
TG-DSC and TG-FTIR Studies of Annelated Triazinylacetic Acid Ethyl Esters—Potential Anticancer Agents DOI: 10.3390/molecules28041735 -
Carboxyl (COOH) 信心 1.0
“cm-1, band at 2251 partially overlapping the very strong band of asymC=O (CO 2), can be attributed to isocyanic acid (HNCO) and/or methyl isocyanate (CH 3NCO) and/or ethyl isocyanate (C 2H 5NCO), which will be confirmed by mass spectromet”
Zangaro 等 - 2019 - Study of the thermal behavior in oxidative and pyr DOI: 10.1016/j.jorganchem.2005.11.058.
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