What absorbs at 2856 cm⁻¹ in an FTIR spectrum?
A band near 2856 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
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
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Alkyl C-H confidence 0.9
“Same as above.”
Ul Hassan 等 - 2022 - Tribological Analysis of Molybdenum Disulfide (MOS DOI: 10.3390/su141710485 -
Alkyl C-H confidence 0.9
“Symmetric stretching vibration absorption peak of -CH2- at 2856 cm-1”
Wang 等 - 2019 - Researches on silane coupling agent treated AlN ce DOI: 10.1007/s10854-019-02402-w -
Alkyl C-H confidence 0.9
“Explicit assignment in text.”
Amorim 等 - 2022 - Bio-Availability, Anticancer Potential, and Chemic DOI: 10.3390/antiox11020360 -
Alkyl C-H confidence 0.9
“Explicit assignment: aliphatic (2924 and 2856 cm-1).”
Neamtu 等 - 2018 - Multidisciplinary Investigation of the Imperial Ga DOI: 10.3390/su10051503 -
Alkyl C-H confidence 0.9
“symmetric stretching (CH2)”
Prabsangob 和 Benjakul - 2018 - Enhancement of thermal stability of soybean oil by DOI: 10.9755/ejfa.2018.v30.i11.1862 -
Alkyl C-H confidence 0.9
“Explicitly assigned to C-H groups”
Santana 等 - 2020 - Aqueous Extracts of the Castor Beans as a Corrosio DOI: 10.21577/0103-5053.20200008 -
Alkyl C-H confidence 0.9
“Assigned to symmetric stretching vibration of -CH2 groups.”
Song 等 - 2011 - Synthesis and Characterization of CaF2 Nanoparticl DOI: 10.3786/nml.v3i2.p73-78 -
Alkyl C-H confidence 0.9
“related to CH stretching”
Sozen - 2022 - Determination of Changes in the Mechanical and Col DOI: 10.15376/biores.17.1.1703-1716
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