Search results
Results from the WOW.Com Content Network
Reaction type Substitution reaction Swarts fluorination is a process whereby the chlorine atoms in a compound – generally an organic compound, but experiments have been performed using silanes – are replaced with fluorine , by treatment with antimony trifluoride in the presence of chlorine or of antimony pentachloride .
The Swarts reaction is generally applied to the synthesis of organofluorine compounds, but experiments have been performed using silanes. [8] It was once used for the industrial production of freon. Other fluorine-containing Lewis acids serve as fluorinating agents in conjunction with hydrogen fluoride.
Schwartz's reagent is the common name for the organozirconium compound with the formula (C 5 H 5) 2 ZrHCl, sometimes called zirconocene hydrochloride or zirconocene chloride hydride, and is named after Jeffrey Schwartz, a chemistry professor at Princeton University.
Bis(trifluoromethyl)peroxide (BTP) is a fluorocarbon derivative first produced by Frédéric Swarts. [3] It has some utility as a radical initiator for polymerisation reactions. BTP is unusual in the fact that, unlike many peroxides, it is a gas, is non-explosive, and has good thermal stability. [4]
It was first prepared in 1901 by Frédéric Swarts, the Belgian chemist who was the first to prepare chlorofluorocarbons in 1892. Swarts used the reaction of zinc with 1,1-difluoro-2-bromoethane. It is produced industrially by two routes, one being the mercury-catalyzed reaction of acetylene and hydrogen fluoride: [2] HC≡CH + HF → CH 2 =CHF
Carboxylic acids can be converted to trifluoromethyl groups by treatment with sulfur tetrafluoride and trihalomethyl compounds, particularly trifluoromethyl ethers and trifluoromethyl aromatics, are converted into trifluoromethyl compounds by treatment with antimony trifluoride/antimony pentachloride (the Swarts reaction).
Algar–Flynn–Oyamada reaction; Alkylimino-de-oxo-bisubstitution; Alkyne trimerisation; Alkyne zipper reaction; Allan–Robinson reaction; Allylic rearrangement; Amadori rearrangement; Amine alkylation; Angeli–Rimini reaction; Andrussov oxidation; Appel reaction; Arbuzov reaction, Arbusow reaction; Arens–Van Dorp synthesis, Isler ...
From dibromofluoromethane by reductive debromination with a Swarts reagent. From a dihalomethane by an halogen exchange reaction or from a halomethane by catalyzed bromination or fluorination . The method with the highest yield is reductive debromination of dibromofluoromethane using an organotin hydride.