A novel route to advanced model systems for silica-immobilized olefin polymerization catalysts
Abstract
Constituting a novel synthetic route to model compounds for titanium catalysts immobilized on silica, the disilylated silsesquioxane derivative Cy7Si7O9(OH)(OSiMe3)2 2a, has been reacted with the ‘tucked-in’ fulvene complex Cp*Ti- (C5Me4CH2) to give the titanium(III) silsesquioxane Cp*2Ti[Cy7Si7O10(OSiMe3 )2] 3, while treatment of Cp*Ti- (C5Me4CH2) with Cy7Si7O9(OH)2(OSiMe3 ) 2b affords the mono(pentamethylcyclopentadienyl) complex Cp*Ti[Cy7- Si7O11(OSiMe3)][Cy7Si7 O10(OH)(OSiMe3)] 4 which is an advanced model compound for a catalytically active titanium center on a silica surface.