Polystyrene attached titanocene species. Preparation and reactions

Extremely Active Catalysts for the Hydrogenation of Terminal Alkenes

“…To increase the catalytic efficiency, the stability of the active species must be increased. For these titanium catalysts, it is generally believed that the breakdown in catalytic activity is due to the dimerization of titanium species in a low valent state (3,4). The use of titanocene with a bulky substituent might hinder the dimerization of active species.…”

“…A bicomponent catalyst composed of a titanocene complex and a reducing agent for the hydrogenation of unsaturated hydrocarbons has attracted much attention (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17). Among the reducing agents employed, lithium alkyls, aluminum alkyls, Grignard reagent, lithium aluminum hydride and its derivatives, as well as alkali metals have been widely studied (18)(19)(20)(21)(22)(23).…”

Polymeric Organometallics as Precursors of Polymer Supported Catalysts

“…2 Our work has concentrated so far on two different types of polymers, graphite and polystyrene . Our general approach has been to attempt to first characterize and more adequately understand…”

Hydrogenation of Olefins Catalyzed by Polymer-Supported Palladium-Imidazole

“…The attachment of metal complexes onto a support to make it insoluble prevents the loss of expensive catalyst material and contamination of reaction mixture and product [3]. Such complexes can catalyze various reactions like hydrogenation, oxidation, and Suzuki cross-coupling [4][5][6].…”