Fluorocarbon metallation reaction

There appear to be limitations on the extent to which reactions between transition metal hydrides and fluoroolefins can be used to make o-bonded fluorocarbon-metal compounds. Unsuccessful attempts have been made to add manganese pentacarbonyl hydride to 1,1-difluoroethylene, 1-chloro-... 

In concluding this section concerned with the preparation of <7-bonded fluorocarbon-metal compounds it is pertinent to mention two reactions which might have given the desired compounds but which in practice do not. 

Recently several compounds have been described in which transition metals are bonded to carbon atoms which are in turn joined to a CF3 group. These substances are obtained from reactions between the acetylene hexafluorobut-2-yne and certain metal carbonyls and related compounds. They are obviously closely related to the other fluorocarbon-metal compounds described earlier. 

Fluorocarbon groups show very strong C—F absorptions in the 1400-1000 cm region of the spectrum. This property has been extremely useful in the preparation of fluorocarbon-metal compounds. By examining the infrared spectrum of the reaction products it is possible to establish immediately whether the synthesis of a fluorocarbon derivative of a metal has been successful or not. The strong C—F absorptions reveal themselves immediately, even if the desired compound is diluted considerably with nonfluorine-containing material. 

Reaction with a Metal Fluoride. A second technique for hydrogen substitution is the reaction of a higher valence metal fluoride with a hydrocarbon to form a fluorocarbon ... 

Amongst the catalysts used or the polymerisation-trimerisation reactions are alkali metal phenolates, alcoholates and carboxylates and compounds containing o-(dimethylaminomethyl)phenol subgroups. Fluorocarbons such as trichloro-fluoromethanes are used as the sole blowing agents in the absence of any isocyanate-water reaction. 

Maximum Volumetric Heats of Reaction for Metals Reacting with Fluorocarbons Equilibrium Composition of the Product of the Reaction of Magnesium... 

Electronic Effects in Metallocenes and Certain Related Systems, 10, 79 Electronic Structure of Alkali Metal Adducts of Aromatic Hydrocarbons, 2, 115 Fast Exchange Reactions of Group I, II, and III Organometallic Compounds, 8,167 Fluorocarbon Derivatives of Metals, 1, 143 Heterocyclic Organoboranes, 2, 257... 

Oxides, halides and oxide halides of a variety of metals are used as catalysts for disproportionation reactions. The choice of catalyst depends on the reaction conditions and the chloro-fluorocarbons used for disproportionation. Table 1 lists the principal compounds. 

Although reaction of [Pt(COD)2] alone with OFCOT did not produce any metal-fluorocarbon products, addition of two molar equivalents of PPh3, AsPh3, or t-BuNC to [Pt(COD)2] followed by addition of OFCOT yielded... 

Reactions of methane and ethane with HF recyclable metal fluorides to give fluorocarbons have been reported briefly in the patent and journal literature [16-18], Reaction of methane with hydrogen fluoride in the presence of oxygen and the salt or oxide of a variable valency metal as catalyst yielded small amounts of fluoromethane and difluoromethane at temperatures above 500°C. Olsen et al. [17] reacted copper(ll) fluoride with methane at high temperatures (>600°C) and found products that always included copper metal, hydrogen fluoride, fluoromethane and carbon. Although activity was first detected around... 

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