404028-87-1Relevant academic research and scientific papers
Formation of tetrafluorobenzyne by β-fluoride elimination in zirconium-perfluorophenyl complexes
Kraft, Bradley M.,Lachicotte, Rene J.,Jones, William D.
, p. 727 - 731 (2008/10/08)
Cp*2ZrH2 (Cp* = pentamethylcyclopentadienyl) and Hg(C6F5)2 react in pentane to form Cp*2Zr(C6F2)H in high yield at room temperature. Cp*2Zr(C6F5)H reacts intramolecularly at 120 °C under an atmosphere of H2 to give Cp*2Zr(o-C6F4H)F quantitatively by β-fluoride elimination and subsequent insertion of tetrafluorobenzyne into the Zr - H bond. Under vacuum, Cp*2Zr(C6F5)H decomposes into a mixture of Cp*2Zr(o-C6F4H)F and the ring methyl C - H activated product, Cp*(Fv)Zr(C6F5) (Fv = tetramethylfulvene). Upon further heating, Cp*(Fv)Zr(C6F5) reacts to form the novel complex Cp*(C5Me4CH2(C6F4)) ZrF, formed by β-fluoride elimination and subsequent insertion of tetrafluorobenzyne into the Zr - CH2 bond.
Carbon-fluorine bond activation of perfluorinated arenes with Cp2*ZrH2
Kraft, Bradley M,Jones, William D
, p. 132 - 140 (2007/10/03)
Reaction of Cp2*ZrH2 (Cp*, pentamethylcyclopentadienyl) with excess hexafluorobenzene produces a mixture of Cp2*ZrHF, C6F5H and Cp2*Zr(C6F5)H in ca. 2:1:1 ratio. Reaction of Cp2*ZrH2 with excess C6F5H produces a mixture of Cp2*ZrHF, Cp2*Zr(C6F5)H, Cp2*Zr(o-C6F4H)H, p-C6F4H2, and o-C6F4H2 with preferred ortho aromatic C-F activation. Dual mechanisms are proposed for the formation of ArFH and Cp2*Zr(ArF)H species.
