Perfluoroolefin complex

Polyfluoroparafins, fluorocarbons, and other perfluoro denvatives show remarkable heat stability They are usually stable at temperatures below 300 C Thermal decomposition at 500-800 °C, however, causes all possible splits in the molecules and produces complex mixtures that are difficult to separate For preparative purposes, only pyrolyses that do not yield complicated mixtures of products are of interest [7] The pyrolytic reacpons of polyfluoro and perfluoro derivatives, when carried out at 500-11 Ofl °C, represent the most useful route to preparative generation of perfluoroolefins on the laboratory scale [7]... 

Complexes of cyclic perfluoroolefins are also quite common. For example, the iron and platinum complexes of perfluorocyclobutene, 20 (62) and 21 (56), have been prepared. Recently the chemistry of the smallest cyclic perfluoro-olefin, perfluorocyclopropene, has been explored, and initial results indicate... 

When perfluoroolefins are codeposited with Pd atoms followed by addition of a trapping ligand, a metallocyclopropane derivative is formed (as opposed to a n-complex with normal olefins) by oxidative addition (see 5.8.2.3.2 for further discussion of olefin reactions). 

Perfluoroolefins also give stable insertion products. Tetrafluoroethylene and penta-carbonyl(methyl)rhenium, for example, yield the tetrafluoropropylrhenium complex along with a small amount of a double insertion product ... 

Jt-Allylnickel and -cobalt compounds insert perfluoroolefins. These are included here because u-alkyl complexes probably are the true reactants. Bis-(7r-2-methallyl)-Ni(II) gives an insertion followed by a reductive elimination producing a Ni(0) complex with tetrafluoroethylene and the 1,7-diene product as a ligand ... 

Electron rich d (n = 6,8,10) complexes have also been demonstrated to activate C-F bonds by nucleophilic or oxidative addition pathways. Most common is nucleophilic displacement of fluoride from a perfluoroaromatic or perfluoroolefinic substrate as typified by the chemistry of [CpFe(CO)2]- and related highly nucleophilic anions as in equation 2 (17). 

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