Fluoroform


Also found in: Dictionary, Thesaurus, Wikipedia.
Related to Fluoroform: trifluoromethane

fluoroform

[′flu̇r·ə‚fȯrm]
(organic chemistry)
CHF3 A colorless, nonflammable gas, boiling point 84°C at 1 atmosphere (101,325 pascals), freezing point 160°C at 1 atmosphere; used in refrigeration and as an intermediate in organic synthesis. Also known as propellant 23; refrigerant 23; trifluoromethane.

Fluoroform

 

(trifluoromethane), CHF3, a colorless gas, with a boiling point of –82.5°C. Unlike chloroform, fluoroform is an inert compound; for example, it is resistant to the action of alkalies. It is prepared from chloroform by an exchange reaction with SbF3 or HF or from chlorotrifluoromethane (Freon-13) and H2, as well as by other methods. It is used as a refrigerant.

References in periodicals archive ?
* the etch step with fluoroform chemistry is used to remove the residual of the ARC and to etch into the first few nanometer of the silicon nitride layer for an improvement of the adhesion between the metal and the silicon nitride layer.
The etch chemistry based on fluoroform creates an etch rate of [approximately equal to] 60 nm/min for silicon nitride and [approximately equal to] 30 nm/min for the silicon dioxide layer underneath.
According to PBE/6-311++G(d,p) calculations, structural evidence has been adduced to show that the blue-shifting hydrogen bonds and red-shifting hydrogen bonds result from the shortening and lengthening of the C-H of fluoroform and chloroform, respectively.
The cell morphologies for fluoroform, nitrogen, and carbon dioxide, respectively, are shown in Micrographs 9-11.
Finally, from the foaming agent series, the more polar fluoroform with a higher density and higher dielectric constant than carbon dioxide, solubilizes the reactants at a lower pressure.