What absorbs at 1178 cm⁻¹ in an FTIR spectrum?
A band near 1178 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 3 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| C c single bond | 3 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
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C c single bond confidence 1.0
“cm(cid:2)1) (down-shied 1159 CH twisting/skeletal stretching from 1178 2 cm(cid:2)1) C-C-C (up-shied 1118 bending from 1109 cm(cid:2)1) C-C C-CN (down-shied 1051 symmetrical stretching of from 1073 cm(cid:2)1 PAN-EC-PC-0% TPAI GPE, respe”
Electrocatalytic and structural properties and computational calculation of PAN-EC-PC-TPAI-I2 gel polymer electrolytes for dye sensitized solar cell application DOI: 10.1039/d1ra01983j -
Protein confidence 1.0
“cm-1, The untreated and fixed isolates clustered together along PC2 due to loadings bands at 1630 The untreated and fixed isolates clustered together along PC2 due to loadings bands at 1630 cm-1, cm-1, cm-1, cm-1, cm-1, cm-1 cm-1, 1482 1433”
Influence of the Sample Preparation Method in Discriminating Candida spp. Using ATR-FTIR Spectroscopy DOI: 10.3390/molecules25071551 -
Phosphate (PO4) confidence 1.0
“LLM confirmed rule peak-group candidate”
Phosphorus-Containing Polybenzoxazine Aerogels with Efficient Flame Retardation and Thermal Insulation DOI: 10.3390/ijms24054314
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