FLUOROAROMATIC CHEMISTRY: SYNTHESIS, PROPERTIES, AND APPLICATIONS OF CERTAIN POLYFLUOROARYL- ORGANOMETALLIC COMPOUNDS
Abstract
Polyfluoroaryllithium and polyfluoroarylmagnesium compounds have been prepared and their chemical reactions studied. These chemical intermediates may be conveniently prepared by either a metal-halogen or metal-hydrogen interconversion reaction. Either Grignards (C2H5MgBr) or organolithiums (C4H9Li) can be used as the source of the metal. In general, the organolithium-bromine interconversions have been found to be the preferred synthesis route. Reactions of certain organolithium intermediates with water, carbon dioxide, sulfur, chlorine, hexafluoroacetone, and metallic halides have been studied. By this procedure numerous difunctional monomeric compounds of perfluoro-benzene, - biphenyl, and -naphthalene can be prepared. Potential applications of certain perfluoroaromatic compounds have been studied. The perfluorophenyltin and phosphorus compounds show excellent anti-oxidant and anti-corrosion activity in certain fluorine-containing high temperature candidate fluids. Tris(pentafluorophenyl)phosphine inhibits the degradation and corrosion of titanium and steel alloys by certain polyperfluoroalkyl ether high temperature operational fluids. Vapor deposition of titanium can be accomplished by the use of bis(cyclopentadienyl)bis(pentafluorophenyl)-titanium. This titanium organometallic has the oxidative and thermal stability requirements necessary in vapor phase deposition technology. High temperature greases have been made utilizing the desirable properties of the polyperfluorophenylene polymer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1967
- Accession Number
- AD0819809
Entities
People
- Christ Tamborski
Organizations
- Air Force Research Laboratory