Chemical Identity and Physical Properties

(Chlorodifluoromethyl)benzene (PhCF₂Cl) is an organofluorine compound with the molecular formula C₇H₅ClF₂. It consists of a benzene ring substituted with a gem-chlorodifluoromethyl group (–CClF₂). The simultaneous presence of two fluorine atoms and one chlorine atom on the benzylic carbon produces a strongly electron-withdrawing substituent, rendering the molecule useful in a variety of electrophilic fluorination strategies.

Key physicochemical attributes include its relatively low molecular weight (approximately 163 g/mol, review flag: confirm exact MW from spec sheet), a liquid state at ambient temperature, and significant volatility requiring adequate ventilation during handling. The C–F bonds confer high chemical stability under many reaction conditions, while the C–Cl bond offers a reactive site for nucleophilic substitution or metal-mediated cross-coupling.

Synthetic Applications in Organofluorine Chemistry

(Chlorodifluoromethyl)benzene serves as a versatile fluorinated building block in synthetic organic chemistry. Its –CClF₂ moiety can participate in radical, nucleophilic, and transition-metal-catalysed reactions to introduce difluoromethyl or difluoromethylene motifs into target molecules.

Key synthetic utilities include:

• Nucleophilic substitution: The activated C–Cl bond undergoes substitution with hard nucleophiles (e.g., alkoxides, thiolates) to provide –CF₂OR or –CF₂SR analogues.
• Transition-metal catalysis: Palladium- or copper-catalysed coupling protocols can leverage the C–Cl bond for cross-coupling, enabling access to complex fluorinated architectures.
• Radical difluoromethylation: Under radical initiation conditions, PhCF₂Cl can generate ·CF₂Ph radicals, useful for difluoromethylation of electron-rich substrates.

Note: Specific reaction conditions and yields should be verified against primary literature before use.

Safe Handling and Storage Guidelines

As a volatile halogenated organic compound, (Chlorodifluoromethyl)benzene requires careful handling. Researchers should observe the following standard precautions:

• Personal Protective Equipment (PPE): Wear chemical-resistant gloves (nitrile or neoprene), safety goggles, and a laboratory coat. Use a fume hood at all times when dispensing or reacting this reagent.
• Ventilation: Ensure adequate local exhaust ventilation to prevent inhalation of vapours, which may cause respiratory irritation.
• Storage: Store in a cool, dry, well-ventilated area away from heat sources, open flames, and incompatible reagents such as strong bases and reducing metals. Keep containers tightly closed when not in use.
• Waste Disposal: Dispose of halogenated organic waste in accordance with local institutional and governmental regulations for halogenated solvents.

Always consult the current Safety Data Sheet (SDS) before use. Specific GHS hazard classifications and first-aid measures should be confirmed from the product SDS (review flag: SDS details not provided in source material).

Quality, Purity, and Procurement Considerations

For reproducible research outcomes, reagent purity is critical when working with (Chlorodifluoromethyl)benzene. Aladdin Scientific offers this compound under SKU C468138. Researchers should note the following when selecting and procuring this reagent:

• Purity Grade: Confirm the stated purity and analytical certificate of analysis (CoA) prior to use. Trace hydrolytic by-products (e.g., benzaldehyde difluoride hydrolysis products) may affect sensitive reactions (review flag: specific purity percentage not stated in source material; verify from CoA).
• Packaging: Select appropriate package sizes to minimise repeated opening and potential moisture or contaminant ingress.
• Shelf Life: Check the product expiry date; halogenated compounds may slowly hydrolyse or decompose on prolonged storage (review flag: specific shelf-life data not provided).
• Cross-reference: This product is referenced as Sigma-Aldrich catalogue number 759309 for comparative sourcing purposes.