Chemical Identity and Physicochemical Properties

2,3,5,6-Tetrafluoro-4-(trifluoromethyl)benzenethiol (Aladdin SKU T162367) is an aromatic thiol bearing fluorine substituents at all four ortho and meta ring positions relative to the thiol group, together with a trifluoromethyl (CF₃) group at the para position. This substitution pattern results in a molecular formula of C₇H₁F₇S and a compound that is among the most electron-deficient benzenethiols available as a synthetic reagent.

The cumulative electron-withdrawing inductive and field effects of the seven fluorine atoms markedly lower the pK_a of the thiol relative to unsubstituted thiophenol, enhancing its acidity and influencing its nucleophilicity. The high degree of fluorination also imparts hydrophobicity and thermal stability characteristic of perfluoroaryl compounds, while the free –SH group retains the characteristic nucleophilic and radical-reactive behavior of thiols.

Note: Specific numerical physicochemical data (boiling point, melting point, density, exact pK_a) are not provided in the current source material and should be verified against the certificate of analysis or authoritative databases such as Reaxys or SciFinder before use in regulated applications.

Handling, Storage, and Safety Considerations

As with all aromatic thiols, 2,3,5,6-Tetrafluoro-4-(trifluoromethyl)benzenethiol should be handled with appropriate caution. Thiophenol derivatives are generally associated with a pungent, offensive odor even at low concentrations; work should be performed in a well-ventilated fume hood at all times.

Recommended standard precautions include:

• Wear appropriate personal protective equipment (PPE): chemical-resistant gloves, safety glasses or goggles, and a laboratory coat.
• Avoid inhalation of vapors; use only in a fume hood.
• Keep the reagent away from strong oxidizers, strong bases, and reactive metals, which may react with the thiol functionality.
• Store under inert atmosphere (nitrogen or argon) in a tightly sealed container at cool, dry conditions to prevent oxidation of the –SH group to disulfide.
• Dispose of waste in accordance with local regulations for halogenated organic compounds.

Refer to the Safety Data Sheet (SDS) supplied by Aladdin Scientific for complete hazard classification, first-aid measures, and disposal guidance specific to SKU T162367. Exact GHS hazard classifications and H/P statements should be confirmed from the current SDS.

Research Applications

The unique combination of a highly electron-deficient perfluoroaryl ring and a reactive thiol group makes 2,3,5,6-Tetrafluoro-4-(trifluoromethyl)benzenethiol useful across several research domains:

1. Organofluorine Synthesis and Building Block Chemistry

The compound serves as a fluorinated building block for constructing complex fluorinated molecules. The activated aromatic ring undergoes nucleophilic aromatic substitution (S_NAr) under mild conditions, enabling introduction of additional functional groups while the –SH group can be protected, transformed, or used directly in further coupling reactions.

2. Self-Assembled Monolayers (SAMs) on Metal Surfaces

Perfluoroaryl thiols are well established as precursors for forming SAMs on gold and other noble metal surfaces. The resulting monolayers exhibit highly hydrophobic, low surface-energy character attributable to the fluorinated aromatic moiety, and are of interest for studies of wettability, tribology, and surface functionalization in sensor and microelectronics research.

3. Thiol-Click and Thiol-Ene Chemistry

The free thiol participates in radical-mediated thiol-ene additions and base- or nucleophile-catalyzed thiol-Michael additions. Incorporation of the perfluoroaryl thiol fragment into polymers or dendrimers via these routes introduces fluorophilic character and modifies thermal and surface properties.

4. Ligand Design and Coordination Chemistry

Electron-poor thiolates derived from this compound can act as ligands for transition metals, influencing the electronic properties of metal centers in catalysis and materials science applications.

Specific literature references supporting each application should be identified and cited; see review_flags for details.

Reagent Specification and Quality

Aladdin Scientific supplies 2,3,5,6-Tetrafluoro-4-(trifluoromethyl)benzenethiol under SKU T162367. Researchers should consult the current product page and certificate of analysis (CoA) for lot-specific data including:

• Purity (typically assessed by GC or NMR)
• Appearance and physical state
• Water content (Karl Fischer titration where applicable)
• Storage conditions and shelf life

For applications sensitive to thiol oxidation (e.g., SAM formation, thiol-click reactions), it is advisable to verify purity by ¹H and ¹⁹F NMR prior to use and to use freshly opened material or material stored rigorously under inert atmosphere.

Contact Aladdin Scientific technical support or your local representative for bulk quantity pricing, custom packaging, or additional analytical data.