24154-19-6

Basic information

• Product Name: Methylium, difluorophenyl-
• CAS NO: 24154-19-6
• Molecular Formula: C7H5F2
• Molecular Weight: 127.114
• Mol File: 24154-19-6.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: Methylium, difluorophenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Methylium, difluorophenyl-(24154-19-6)
• EPA Substance Registry System: Methylium, difluorophenyl-(24154-19-6)

Safety Data

• Hazardous Substances Data: 24154-19-6(Hazardous Substances Data)

Upstream product

• 18851-76-8 trifluoromethylium 
• 71-43-2 benzene 
• 75-73-0 carbon tetrafluoride 
• 100-52-7 benzaldehyde 
• 98-08-8 α,α,α-trifluorotoluene 

Relevant articles and documents

Chemical ionization using CF3+: Efficient detection of small alkanes and fluorocarbons

The trifluoromethyl ion CF3+ is evaluated as a chemical ionization (CI) precursor in a compact Fourier Transform Ion Cyclotron Resonance (FTICR) mass spectrometer. It reacts with alkanes by hydride abstraction allowing characterization and quantification of alkanes up to C4 and cyclic. With larger alkanes fragmentation occurs. Fluorocarbons react by fluoride abstraction. Rate coefficients have been measured for reaction with alkanes, fluoroalkanes, chlorofluoroalkanes as well as several common VOCs. Use of CF3+ for trace analysis in air has been tested on an air sample containing traces of acetone, toluene, benzene and cyclohexane. The results are consistent with those obtained with H3O+ precursor and allow additional cyclohexane quantification.

Mass-Spectrometric Study on Ion-Molecule Reactions of CF3+ with PhX at Near-Thermal Energy

The gas-phase ion-molecule reactions of CF3+ with benzene, toluene, ethylbenzene, styrene, and ethynylbenzene have been studied at near-thermal energy using an ion-beam apparatus.The major product channels are electrophilic addition followed by HF elimination for benzene (93.4+/-2.2percent), toluene (84.3+/-2.4percent) and ethynylbenzene (76.9+/-0.9percent).The dominant product channels for ethylbenzene are electrophilic addition followed by C2H4 and C2H4+HF eliminations (78.9+/-4.7percent), while those for styrene are electrophilic addition followed by one or two HF eliminations and C2H2F2 elimination (91.7+/-0.4percent).Only ethynylbenzene gives an initial adduct ion with a small branching ratio of 6.2+/-0.4percent.As minor product channels, hydride transfer occurs for benzene (6.6+/-2.2percent) and toluene (7.8+/-1.5percent), and charge transfer takes place for toluene (7.9+/-2.0percent), styrene (8.3+/-1.4percent), and ethynylbenzene (6.2+/-0.4percent).The reaction mechanisms are discussed on the basis of product ion distributions and semi-empirical calculations of potential energies of reaction pathways.