New methods for synthesizing poly(carbon monofluoride) (CF$\sb{\rm X})\sb{\rm n}$ and tetracarbon monofluoride C$\sb4$F are reported. Pyrolytic graphite has been fluorinated and a new compound, graphite oxyfluoride, has been prepared. Poly(carbon monofluoride) has been prepared in a flow reactor, in a fluidized bed reactor, and in a high pressure bomb reactor and tetracarbon monofluoride has been prepared by a high pressure bomb technique. Some new structural data are presented for poly(carbon monofluoride).
A new method for controlling the reaction of elemental fluorine with hydrocarbons is described. The rate of reaction between fluorine and hydrocarbons has been so successfully controlled that direct fluorination appears to be not only practical but the best method available for preparing fluorocarbons. Anthracene, tetracene, pentacene, p-dichlorobenzene, naphthalene, coronene, ovalene and decacyclene have been fluorinated at room temperature to yield the corresponding perfluoroalicyclic fluorocarbons in very high yields approaching 100%.
The reactions of elemental fluorine with finely powdered hydrocarbon polymers and paraffins have been carefully controlled so that the products of the reactions are perfluorocarbon polymers and perfluoroparaffin fluorocarbon materials. This process constitutes a new approach to the synthesis of fluorocarbon polymers. Polyethylene, polypropylene, polystyrene, polyacrylonitrile, polyacrylamide and n-dotricontane, CH$\sb3$-(CH$\sb2$)$\sb{30}$-CH$\sb3$ have been fluorinated to yield polytetrafluoroethylene, polyhexafluoropropylene, perfluoroperhydropolystyrene, perfluoropolyacrylonitrile, perfluoropolyacrylamide and perfluoro n-dotricontane. High yields approaching 100% have been obtained. This direct technique for fluorination of hydrocarbons and related plastics is called the La-Mar process.
The reactions of sodium borohydride, potassium borohydride, lithium borohydride and lithium aluminum hydride with elemental fluorine have been investigated. The products obtained are sodium tetrafluoroborate, NaBF$\sb4$; potassium tetrafluoroborate, KBF$\sb4$; lithium tetrafluoroaluminate, LiAlF$\sb4$. This direct fluorination process establishes a new preparation for the fluoborates and has produced the new compound lithium tetrafluoroaluminate. Yields near 100% have been obtained.
The controlled reaction of elemental fluorine with two $\beta$-tri-chloro-borazines is reported. $\beta$-trichloroborazine and $\beta$-trichloro-N-triphenyl-borazine are fluorinated to yield various fluorochloro derivatives under very mild conditions, and a large number of new highly fluorinated species under vigorous conditions. Some of the new species reported are $\beta$-trichloro-N-trifluoro-borazine, hexa-fluoro-borazine, and $\beta$-trichloro-N-perfluorocyclohexyl-borazine. These molecules are believed to be the first N-fluorinated borazines to be reported.
| Identifer | oai:union.ndltd.org:RICE/oai:scholarship.rice.edu:1911/16744 |
| Date | January 1970 |
| Creators | Lagow, Richard James |
| Source Sets | Rice University |
| Language | English |
| Detected Language | English |
| Type | Thesis, Text |
| Format | application/pdf |
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