What absorbs at 546 cm⁻¹ in an FTIR spectrum?
A band near 546 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
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Metal oxygen | 3 | 3 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Urea | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Metal oxygen confidence 1.0
“LLM confirmed rule peak-group candidate”
Francis 等 - 2016 - Optical nonlinearity in multiferroic bismuth ferri DOI: 10.1016/j.jallcom.2016.07.094 -
Metal oxygen confidence 1.0
“LLM confirmed rule peak-group candidate”
Ionic Liquid Functionalized Metal–Organic Framework ([DEIm][PF6]@MOF-5): Synthesis, Characterization, and Catalytic Application in the Reduction of 4-Nitrophenol DOI: 10.1021/acsomega.2c05808 -
Urea confidence 1.0
“On the other hand, the band at 546 cm-1 is attributed to the Bi=O stretching, while the band solutions of urea with various bismuth(III) salts at high temperature.”
Synthesis and Characterization of a New Aluminum-Doped Bismuth Subcarbonate DOI: 10.3390/cryst9090466 -
Metal oxygen confidence 1.0
“FTIR spectrum shows cm´1 cm´1 two absorption bands around 546.18 and 412.58 which represent intrinsic metal oxide stretching vibrations at tetrahedral and octahedral lattice sites.”
Temperature-Dependent Magnetic Response of Antiferromagnetic Doping in Cobalt Ferrite Nanostructures DOI: 10.3390/nano6040073 -
Ring structure confidence 1.0
“The band at around 546 is attributed to five-ring units in the pentasil structure of ZSM-5 [8].”
Riski 等 - 2018 - Effect Of Aging Temperature On The Synthesis Of Hi DOI: 10.1063/1.5082443
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