Synthesis monofluoride

Graphite fluoride continues to be of interest as a high temperature lubricant (6). Careful temperature control at 627 3° C results in the synthesis of poly(carbon monofluoride) [25136-85-0] (6). The compound remains stable in air to ca 600°C and is a superior lubricant under extreme conditions of high temperatures, heavy loads, and oxidising conditions (see Lubrication and lubricants). It can be used as an anode for high energy batteries (qv). 

Chlorine monofluoride oxide, 18 328-330 force field of, 18 329, 330 infrared spectrum of, 18 328, 329 stretching force constants for, 18 330 synthesis of, 18 328 Chlorine nitrate fluorination of, 18 332 preparation of, 5 54 Chlorine oxides, 46 109-110, 158 fluorination of, 18 348 Chlorine oxyfluorides, 18 319-389, see also specific compounds adduct formation, 18 327, 328 amphoteric nature of, 18 327, 328 bond lengths, 18 326 bond strengths, 18 323-327 geometry of, 18 320-323 ligand distribution, 18 323 reactivity of, 18 327, 328 stretching force constants, 18 324-327 Chlorine pentafluoride oxide, 18 345, 346 Chlorine trifluoride, reaction with difluoramine, 33 157... 

When BrF3 is mixed with bromine, the active species is bromine monofluoride and this can be added to olefins (equation 118)213. Bromine trifluoride also used to prepare compounds with hypervalent heteroatoms, many of them, unattainable otherwise (equation 119)214. A key step in Lemal and coworkers unique synthesis of perfluorocyclopentadiene involved also an oxidative fluorination (equation 120)215. BrF3 can also substitute halogens and was used for the preparation of L-3-fluoroalanine 21 (equation 121)216. 

Construction of furan ring of 131 by acid-catalyzed cyclization of 134 cannot be achieved due to low reactivity of the a,a-difluorinated double bond toward protonation. Therefore, the following sequence was employed for the total synthesis of 131 (Scheme 12.20) fluorination of lactone 133, introduction of a double bond to 136 by Wittig olefination, and modification of R part of O ." " The use of manganese enolate of lactone 133 is useful for one-pot difluorination. The reaction of the lithium enolate of 133 with the conventional electrophilic fluorinating reagent such as N-fluorobenzenesulfonimide provides only monofluoride 135. 

The Direct Fluorination of Polymers and the Synthesis of Poly(carbon monofluoride) in Fluorine Plasma... 

A new fluidized bed plasma synthesis for poly(carbon monofluoride) is reported. 

In the following sections, we review two of our major studies on the subject of new fluorinated polymers (1) direct fluorination of polymers, and (2) synthesis of poly (carbon monofluoride) in a fluorine plasma. Since both studies were published in nonengineering oriented journals, we would like to describe the experimental parts in full for those who are interested in the field of friction and wear. 

N-(2-Chloro-l,l,2-trifluoroethyl)diethylamine, which is readily prepared from chlorotrifluoroethylene (EtjNH + CFa CFCI- EtjN-CF -CHFCI), has seen more use in the conversion of steroidal alcohols into the corresponding monofluorides with the synthesis of 11 j8-fluoro-counterparts of 1 loi-hydroxy-19-nor-steroids. Furthermore, the ll)3-chloro- and -bromo-analogues have been obtained by treatment of the 1 la-hydroxy-steroids with the a-fluoroamine reagent in the presence of lithium chloride and bromide, respectively, e.g. 

Trifluoromethylsulphur chloride tetrafluoride, CF3-SF4C1 (which possesses a tronj-octahedral configuration so that all four fluorines attached to sulphur are equivalent), has been prepared by reaction of trifluoromethylsulphur trifluoride with chlorine in the presence of caesium fluoride at room temperature this synthesis is analogous to that of sulphur chloride pentafluoride from sulphur tetrafluoride, chlorine, and caesium fluoride, a method claimed to be inferior to the addition of chlorine monofluoride to sulphur tetrafluoride in the presence of caesium fluoride specially activated by a fusion-solidification-fine-grinding technique. Bis(perfluoroalkyl)-sulphur difluorides result from the fluorination of bis(perfluoroalkyl) sulphides with chlorine monofluoride ... 

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