• Meilleure correspondance de bibliothèque: 1,2,4,5-tetrafluoro-3,6-bis(trifluoromethyl)benzene #247

• The proposed library compound 1,2,4,5-tetrafluoro-3,6-bis(trifluoromethyl)benzene is not strongly supported because the retrieval confidence is zero.
• A fully fluorinated aromatic assignment is limited by the presence of a clear 2965 cm⁻1 aliphatic C-H stretch.
• The Top-15 candidates are chemically heterogeneous, including acetate, styrenic polymer, silane, aromatic hydrocarbons, sulfur-oxygen heterocycle, and amines, which weakens any narrow library-based conclusion.
• The available evidence does not distinguish whether the 1078-1254 cm⁻1 bands arise mainly from C-F, C-O, vinyl-associated, or other substituted-ring vibrations.
• Substitution pattern on the aromatic ring cannot be assigned confidently from the present peak list alone.
• The data provided do not show enough corroborating high-confidence library or literature agreement to decide between a small aromatic molecule, an aromatic-containing polymer, or a mixed organic residue.

Prochaines étapes recommandées: Acquire and review the full FTIR spectrum shape and relative intensities, especially in the 1000-1300 cm⁻1 and 2800-3100 cm⁻1 regions, to separate C-F/C-O contributions from ordinary hydrocarbon and vinyl features. Check for additional aromatic overtone and combination bands in the 1600-2000 cm⁻1 region and for any weak C=C or carbonyl features that may have been omitted from the peak list. If the sample origin allows it, compare against targeted reference spectra for substituted styrenic materials, halogenated aromatic compounds, and allylic or vinyl-containing organics rather than relying on the current broad low-match library search. Use a complementary method such as Raman, GC-MS, or pyrolysis-GC-MS if compound identity or polymer/additive discrimination is required.