On the attempted synthesis of salts with the trimethyl[bis(pentafluorophenyl)]silicate ion, [Me3Si(C6F5)2]−—A polyphenyl problem

Formation of perfluorinated polyphenylenes by multiple pentafluorophenylation using C6F5Si(CH3)3

“…The formation of 8f from C 6 F 5 Si(CH 3 ) 3 was also reported in the attempted synthesis of [(CH 3 ) 3 Si(C 6 F 5 ) 2 ] À anion [20]. In this previous report, even using a fluoride ion source having no hydrogen atoms, such as CsF, formation of 8f could not be prevented.…”

Multiple Pentafluorophenylation of 2,2,3,3,5,6,6-Heptafluoro-3,6-dihydro-2H-1,4-oxazine with an Organosilicon Reagent: NMR and DFT Structural Analysis of Oligo(perfluoroaryl) Compounds

“…the C 6 F 5 -ring environment leads to such a profound change in the reactivity of the para position of the C 6 F 5 ring in the Ad N -E mechanism. Recently, the formation of 1-H-perfluoro-4,4'-polyphenyls (1-H(C 6 F 4 ) n F) was reported by nucleophilic attack at the para position of a C 6 F 5 ring in the reaction of Me 3 A C H T U N G T R E N N U N G Si(C 6 F 5 ) with CsF or Me 4 A C H T U N G T R E N N U N G NF [25], but no details were reported regarding compound characterization. 2.…”

Synthesis, NMR spectroscopic characterisation and reactions of 2,6-difluorophenylxenon fluoride, 2,6-F2C6H3XeF

“…The formation of the reactive silicate intermediate appeared to be the rate determining step. It has to be noted that formation of polyphenyls as described for the decay of intermediately formed silicates [20] can be excluded in reactions with Me 3 SiC 6 F 5 under the chosen conditions. …”