78844-51-6

Basic information

• Product Name: perfluoroacetylmethylmethylene
• CAS NO: 78844-51-6
• Molecular Weight: 178.034
• Mol File: 78844-51-6.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: perfluoroacetylmethylmethylene(CAS DataBase Reference)
• NIST Chemistry Reference: perfluoroacetylmethylmethylene(78844-51-6)
• EPA Substance Registry System: perfluoroacetylmethylmethylene(78844-51-6)

Safety Data

• Hazardous Substances Data: 78844-51-6(Hazardous Substances Data)

Upstream product

• 2834-21-1 hexafluoro-3-diazo-2-butanone 
• 201230-82-2 carbon monoxide 
• 692-50-2 hexafluoro-2-butyne 

Relevant articles and documents

Photolysis of hexafluoro-2-butyne/ozone mixtures in cryogenic matrices

Matrix studies on the photolytic reaction between ozone and hexafluoro-2-butyne have been performed at 11 K in argon and nitrogen matrices. The matrices were photolyzed with 640 and 642 nm light from a laser source, and with 254 nm light from a Hg arc lamp. The final products of the reaction are perfluorobutanedione and bis(trifluoromethyl)ketene. An intermediate species was also observed. It has been identified as perfluoroacetylmethylmethylene, a ketocarbene. The ketocarbene was also trapped as trifluoromethyl trifluoroacetylketene, a ketoketene, when the matrix was doped with CO. Photolysis of the ketocarbene with 427 nm light results in the direct formation of the ketene. The ketocarbene and ketene form as a result of O atom addition to the butyne, whereas the butanedione appears to be predominantly produced by a reaction between the ketocarbene and O2. Product distribution was found to depend greatly on both matrix material and ozone concentration. This is the first direct evidence of a ketocarbene as an intermediate in the O atom addition to an alkyne.

Argon Matrix Isolation of Bis(trifluoromethyl)oxirene, Perfluoromethylathyloxirene, and Their Isomeric Ketocarbenes

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