What absorbs at 2941 cm⁻¹ in an FTIR spectrum?
A band near 2941 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
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Alkyl C-H | 7 | 7 | 1.0 |
| N h | 1 | 1 | 0.9 |
| Amide | 1 | 1 | 0.9 |
| Methyl | 1 | 1 | 0.9 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Alkyl C-H confidence 1.0
“stretching vibrations of -CH2”
Rupiasih 等 - 2018 - Study on Transport Properties of Chitosan Membrane DOI: 10.5614/j.math.fund.sci.2018.50.2.6 -
Alkyl C-H confidence 0.9
“Explicit assignment in text.”
Ang 等 - 2021 - Modifying Cellulose Acetate Mixed-Matrix Membranes DOI: 10.3390/membranes11020080 -
Alkyl C-H confidence 0.9
“aliphatic C-H”
Cankaya 等 - 2021 - Preparation of poly(MPAEMA)halloysite Nanocomposi DOI: 10.29356/jmcs.v65i2.1257 -
Methyl confidence 0.9
“Symmetrical stretching of CH3”
Gupta 等 - 2018 - Effects of Amphiphilic Chitosan on Stereocomplexat DOI: 10.1038/s41598-018-22281-1 -
Amide confidence 0.9
“Explicit assignment in text.”
Jafari 等 - 2023 - Preparation and characterization of active Cirish DOI: 10.1002/fsn3.3106 -
Alkyl C-H confidence 0.9
“Explicit assignment in text”
Kamboj 和 Verma - 2019 - Palmitic Acid-Pluronic F127-Palmitic Acid Pentablo DOI: 10.4274/tjps.galenos.2018.20082 -
Alkyl C-H confidence 0.9
“Explicit assignment: 'the peak at 2941 is the C-H stretching /ja of NH'”
Wang 等 - 2014 - Chiral Separation of Racemic Naproxen by High-Perf DOI: 10.5740/jaoacint.12-200 -
Alkyl C-H confidence 0.9
“Text: '2941 and 2909 ν(C-H)'”
dos Santos 等 - 2020 - Layered cryogels laden with Brazilian honey intend DOI: 10.1590/0104-1428.06820
Have a spectrum with this band?
Upload your FTIR spectrum and get a full interpretation report — peak assignments with literature citations, library matches, and a confidence-rated evidence chain — in seconds.
Interpret my spectrum