81123-05-9

Basic information

• Product Name: Ethylidene, 2,2,2-trifluoro-1-phenyl-
• CAS NO: 81123-05-9
• Molecular Formula: C8H5F3
• Molecular Weight: 158.123
• Mol File: 81123-05-9.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: Ethylidene, 2,2,2-trifluoro-1-phenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Ethylidene, 2,2,2-trifluoro-1-phenyl-(81123-05-9)
• EPA Substance Registry System: Ethylidene, 2,2,2-trifluoro-1-phenyl-(81123-05-9)

Safety Data

• Hazardous Substances Data: 81123-05-9(Hazardous Substances Data)

Upstream product

• 13652-07-8 phenyltrifluorodiazoethane 
• 73899-14-6 3-phenyl-3-(trifluoromethyl)-3H-diazirine 

Relevant articles and documents

LOW-TEMPERATURE STABILIZATION AND MATRIX IR SPECTRA OF PHENYLBROMOCARBENE AND PHENYLTRIFLUOROMETHYLCARBENE

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Trifluoromethylphenylcarbenes. Carbene-Carbene Interconversion on the Singlet Energy Surface and Rearrangement to Trifluorobenzocyclobutene, Trifluorostyrene, and Trifluoromethylfulvenallenes

The four isomeric α-, ortho-, meta-, and para-trifluoromethylphenylcarbenes were generated by photolysis of the corresponding 3-phenyl-3-trifluoromethyldiazirene 1 or the four isomeric trifluoromethylphenyldiazomethanes 2 and 4-6. The four corresponding triplet trifluoromethylphenylcarbenes 3 and 7-9 were observed by electron spin resonance (ESR) spectroscopy in Ar matrices at 14K. The α- and ortho-carbenes 3 and 7 and the ortho- and para-carbenes 7 and 9 interconvert partially when generated by short-wavelength photolysis (350nm) before intersystem crossing to the triplet states. The triplet states do not undergo further Carbene-Carbene interconversion. The interconversions are assumed to take place via the meta-trifluoromethylphenylcarbene 8. When the ortho- and para-carbenes are generated by long-wavelength photolysis (>450nm), the discrete, non-interconverting triplet carbenes are observed in the ESR spectra. Flash vacuum thermolysis of the diazirene 1 at 500°C afforded a mixture of bis(trifluoromethyl)heptafulvalenes 11, bis(trifluoromethyl)stilbenes 12, and bis(trifluoromethyl)anthracenes 13, and the presence of their likely precursor(s), trifluoromethylcycloheptatetraene(s), was confirmed by a peak at 1830cm-1 in the Ar matrix IR spectrum. In addition, at 700°C, four monomeric carbene rearrangement products were isolated and characterised, viz. 1,1,2-trifluorobenzocyclobutene 14, 1′,2′,2′-trifluorostyrene 15, and 1- and 2-trifluoromethylfulvenallenes 16 and 17.

On the Thermal Decomposition of Diazirines

Kinetic data for the thermal decomposition of 3-phenyl-3-trifluoromethyldiazirine, 1-phenyl-2,2,2-trifluorodiazoethane, and 3-methyl-3-vinyldiazirine are reported.Detailed analysis of the previously studied diazirine decompositions suggest a mechanism in which a carbene-nitrogen complex is formed as the first intermediate.This complex, depending on the relative rates and stabilities of intermediates and products, may collapse to a diazo compound and /or form a free carbene.Thus for different diazirines the isomerization to a diazo compound may or may not be observed.