Metal vapor synthesis trifluoromethyls

PerfluoroaUcyl cadmium compounds are also known. Bis(trifluoromethyl)cadmium has been prepared at -78 °C by cocondensing Cd atoms with -CFs radicals generated in a hexafluoroethane plasma (see Metal Vapor Synthesis of Transition Metal Compounds),and also by the unusual reaction of activated cadmium powder with difluorodihalomethanes, for example, CF2CI2, CF2Br2, or CF2BrCl, in DMF (equation 7). ... 

V. A New General Synthesis for Trifluoromethyl Organometallic Compounds and Other Sigma-Bonded Metal Compounds Based on Metal Vapor as a Reagent... 

Previously, trifluorosilyl groups have been bound to phosphorus (40) and silicon via the SiF (g), fluorine-bond insertion-mechanism (41). The new compound HgCSiFs) is readily hydrolyzed, but it can be stored for long periods of time in an inert atmosphere. It is a volatile, white solid that is stable up to at least 80°C. The preparation of bis(trifluoro-silyDmercury, of course, raises the possibility of (a) synthesis of the complete series of trifluorosilyl, "silametallic compounds, as had previously been done for bis(trifluoromethyl)mercury by using conventional syntheses, and (b) transfer reactions similar to those in Section II, as well as (c) further exploration of the metal-vapor approach. The compound Hg(SiF.,)j appears also to be a convenient source of difluoro-silane upon thermal decomposition, analogous to bis(trifluoromethyl)-mercury ... 

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