Fluorofluorenes [1,2,3,4,5,6,7,8ƒ{octafluoroƒ{9ƒ{(pentafluorophenyl)ƒ{9Hƒ{fluorene, OFPF, 1,2,3,4,5,6,7,8ƒ{octafluoroƒ{9ƒ{(2,4ƒ{trifluoromethylphenyl)ƒ{9H¡Vfluorene, OFTF, and 1,2,3,4,5,6,7,8ƒ{octafluorofluorene, OFF] react with sodium hydride or with lithium alkyls to give fluorofluorenyl anions which have been characterized in solution by 19F−NMR spectroscopy. OFPF is deprotonated by ethylenediamine, by HMPT and by 1,7ƒ{diazoƒ{bicyclo(5,4)ƒ{undecƒ{7ƒ{ene, DBU, as shown by 1Hƒ{ and 19Fƒ{NMR spectrometry. The new compound [racƒ{ethyleneƒ{bis(ƒØ5ƒ{4,5,6,7ƒ{tetrahydroindenyl)]diallylzirconium(IV), ZRAL, as prepared from [racƒ{ethyleneƒ{bis(ƒØ5ƒ{4,5,6,7ƒ{tetrahydroindenyl)]dichloridezirconium(IV) and allylmagnesium chloride, undergoes allyl abstraction with OFPF, CPh3[B(C6F5)4], and B(C6F5)3 forming zirconiumƒ{containing cations, as established by 1Hƒ{ and 19Fƒ{NMR spectrometry. Toluene/pentafluoroanisole solutions of the fluorinated anions, in combination with ZRAL, catalyze the...
Perfluorofluorenyl Anions and their Use as Coƒ{Catalysts in the Zirconoceneƒ{Promoted Polymerization of Olefins
CALDERAZZO, FAUSTO;PAMPALONI, GUIDO;
2005-01-01
Abstract
Fluorofluorenes [1,2,3,4,5,6,7,8ƒ{octafluoroƒ{9ƒ{(pentafluorophenyl)ƒ{9Hƒ{fluorene, OFPF, 1,2,3,4,5,6,7,8ƒ{octafluoroƒ{9ƒ{(2,4ƒ{trifluoromethylphenyl)ƒ{9H¡Vfluorene, OFTF, and 1,2,3,4,5,6,7,8ƒ{octafluorofluorene, OFF] react with sodium hydride or with lithium alkyls to give fluorofluorenyl anions which have been characterized in solution by 19F−NMR spectroscopy. OFPF is deprotonated by ethylenediamine, by HMPT and by 1,7ƒ{diazoƒ{bicyclo(5,4)ƒ{undecƒ{7ƒ{ene, DBU, as shown by 1Hƒ{ and 19Fƒ{NMR spectrometry. The new compound [racƒ{ethyleneƒ{bis(ƒØ5ƒ{4,5,6,7ƒ{tetrahydroindenyl)]diallylzirconium(IV), ZRAL, as prepared from [racƒ{ethyleneƒ{bis(ƒØ5ƒ{4,5,6,7ƒ{tetrahydroindenyl)]dichloridezirconium(IV) and allylmagnesium chloride, undergoes allyl abstraction with OFPF, CPh3[B(C6F5)4], and B(C6F5)3 forming zirconiumƒ{containing cations, as established by 1Hƒ{ and 19Fƒ{NMR spectrometry. Toluene/pentafluoroanisole solutions of the fluorinated anions, in combination with ZRAL, catalyze the...I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
