What absorbs at 991 cm⁻¹ in an FTIR spectrum?
A band near 991 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 5 cited sources
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| C c single bond | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Bibliographie derrière ces attributions
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N-O bond confiance 1,0
“80 3250.99,76.51 1687.44,76.79 70 2815.57,32.692423.57,73.51 2069.02,66.041849.56,74.03 3871.87,75.87 2312.85,75.63 1402.29,66.08 753.51,66.68 60 Results And Discussion 3799.54,76.57 2945.45,63.15 673.11,3.44520.46,67.86 1343.49,60.79 1053.”
Gowda 和 Eraiah - 2013 - Synthesis and Structural Studies Of Praseodymium D DOI: 10.1063/1.4791162 -
Alkyl C-H confiance 1,0
“thiophene), 1357.21 (C-N and N-N stretching vibration), 1278.82 (in-plane C-H stretching vibration cm-1, of thiophene), 1145.5 (C-H bending vibration), 991.33, 889.64, and 799.05 wherein the C-H stretching vibration of the thiophene ring wa”
Novel Hemocompatible Imine Compounds as Alternatives for Antimicrobial Therapy in Pharmaceutical Application DOI: 10.3390/pr8111476 -
C c single bond confiance 1,0
“The spectra of pentoses (arabinose and xylose) were 210 cm-1, dominated by a band at 991 and 1034 respectively, mainly due to the ν(C-C), 211 ν(C-O) and β(C-CH) vibrations (Edwards, 1976).”
Revisiting the contribution of ATR-FTIR spectroscopy to characterize plant cell wall polysaccharides DOI: 10.1016/j.carbpol.2021.117935 -
Alkyl C-H confiance 1,0
“Thus, the broad band centered at 3327 cm-1 was cm´1 N-H stretching vibration of secondary amines, the peak at 1151 corresponds to C-N vibrations, assigned to N-H stretching vibration of secondary amines, the peak at 1151 cm-1 corresponds to”
Magina 等 - 2016 - High Pressure Laminates with Antimicrobial Propert DOI: 10.3390/ma9020100 -
C c single bond confiance 1,0
“< cm-1), deoxyribose (850-980 phospholipids, cm-1) lipids and C-C stretching in carbohydrates (991tyrosine and phenylalanine (1504-1626 cm-1) 1098 and amide I and fatty acids (1649were decreased with an increase in GS.”
Vibrational Spectroscopy of Liquid Biopsies for Prostate Cancer Diagnosis DOI: 10.1177/1758835920918499
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