Nitrile — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Nitrile tends to absorb, compiled from published literature and ranked by supporting evidence. Each assignment is traceable to a source (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Quick answer
Nitrile is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.
Characteristic FTIR peaks for Nitrile
| Wavenumber (cm⁻¹) | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| 2200 | 6 | 4 | 1.0 |
| 2240 | 5 | 4 | 1.0 |
| 2243 | 4 | 4 | 1.0 |
| 2100 | 4 | 1 | 1.0 |
| 2250 | 3 | 3 | 1.0 |
| 2210 | 3 | 3 | 1.0 |
| 2224 | 3 | 3 | 1.0 |
| 2237 | 3 | 2 | 1.0 |
| 2260 | 2 | 2 | 1.0 |
| 2400 | 2 | 2 | 1.0 |
| 2221 | 2 | 2 | 1.0 |
| 2230 | 2 | 2 | 1.0 |
| 2239 | 2 | 2 | 1.0 |
| 2244 | 2 | 2 | 1.0 |
| 2242 | 2 | 2 | 1.0 |
| 2072 | 2 | 1 | 1.0 |
| 2245 | 2 | 1 | 1.0 |
| 2019 | 1 | 1 | 1.0 |
| 2550 | 1 | 1 | 1.0 |
| 2184 | 1 | 1 | 1.0 |
| 1950 | 1 | 1 | 1.0 |
| 1496 | 1 | 1 | 1.0 |
| 2217 | 1 | 1 | 1.0 |
| 2924 | 1 | 1 | 1.0 |
| 1336 | 1 | 1 | 1.0 |
| 1232 | 1 | 1 | 1.0 |
| 2192 | 1 | 1 | 1.0 |
| 2194 | 1 | 1 | 1.0 |
| 2500 | 1 | 1 | 1.0 |
| 1657 | 1 | 1 | 1.0 |
Showing the 30 best-supported peaks of 94 total for Nitrile.
Spectrum logic
A functional-group assignment becomes more confident when several expected bands appear together. Use this page to find the strongest-supported peaks, then confirm that the same sample exhibits a coherent pattern rather than a single isolated hit.
Real-world usage
These pages are useful for unknown material analysis, peak explanation in reports, polymer troubleshooting, and verifying whether a candidate material family is chemically plausible.
Common mistakes
- Using one functional-group page as a complete material verdict without checking the rest of the spectrum.
- Assuming the strongest band is always the most diagnostic one.
- Forgetting that processing, additives, aging, and mixtures can shift or broaden expected peaks.
Verification advice
Use DSC, GC-MS, or TGA when several material families share similar bands or when mixture effects make the FTIR assignment uncertain.
Literature behind these assignments
-
832 cm⁻¹ confidence 1.0
“49 C≡N stretch (831.5 and stretch (2278 The C-H stretching fundamental mode of 50”
Blue-Shifted Hydrogen Bonding in the Gas Phase CH/D3CN●●●HCCl3 Complexes DOI: 10.1021/acs.jpca.8b12200 -
2237 cm⁻¹ confidence 1.0
“LLM confirmed rule peak-group candidate”
A Statistical Analysis on the Effect of Antioxidants on the Thermal-Oxidative Stability of Commercial Mass- and Emulsion-Polymerized ABS DOI: 10.3390/polym11010025 -
2200 cm⁻¹ confidence 1.0
“Nitrile bands at approximately 2200 sp3 were identified in all films.”
Galeano-Osorio 等 - 2014 - Carbon nitride films grown by cathodic vacuum arc DOI: 10.1126/science.245.4920.841 -
2339 cm⁻¹ confidence 1.0
“2236.30 2237 2236 C≡N stretching 2339.49 2339.49”
Ganesan 等 - 2018 - The effect of titanium dioxide nano-filler on the DOI: 10.1007/s10854-018-8815-8 -
2089 cm⁻¹ confidence 1.0
“LLM confirmed rule peak-group candidate”
Gerber 和 Erasmus - 2018 - Electronic effects of metal hexacyanoferrates An DOI: 10.1016/j.matchemphys.2017.09.029 -
2266 cm⁻¹ confidence 1.0
“Finally, the films deposited at different cm-1 Ar/N gas mixture reveal the presence of the 2266 stretching peak related to CN triple sp-bonds 2 (C≡N) of nitriles [16, 18].”
Mechanical and tribological characterization of CNx films deposited by d.c. magnetron sputtering DOI: 10.1002/pssc.200675911 -
2200 cm⁻¹ confidence 1.0
“It is worth to mention that, in the present study the PPy film growth process in cold plasma polymerization tech- (CBN) cm21 indicates absence of nitrile group band at 2200 nique, the activation of monomers and reactivation of the”
Microstructural, wetting, and dielectric properties of plasma polymerized polypyrrole thin films DOI: 10.1002/app.43982 -
2247 cm⁻¹ confidence 1.0
“Figure.3 showed that the mid-strong 3451cm-1 peak at was the O-H stretching vibration absorption peak, the C-H stretching vibration cm-1,2959cm-1, 2929cm-1, 2879cm-1, 2746cm-1, absorption peaks were located at 3061 and the peaks 2247cm-1, 2”
Li 等 - 2011 - The detection of Cypermethrin on the surface of Ap DOI: 10.4028/www.scientific.net/AMR.287-290.2991
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