| Abstract
| - The sulfated metal oxides (SMOs) sulfated stannia (SnS), sulfated iron oxide (FeS), and sulfated titaniumdioxide (TiS) have been synthesized and examined as support materials/cocatalysts/activators for molecule-based olefin polymerization and hydrogenation catalysis. 13C CPMAS NMR spectroscopic analysis of Cp2Zr(13CH3)2/SMO chemisorption shows that cationic zirconocenium species are formed along with varyingamounts of catalytically inactive μ-oxo (Cp2Zr(CH3)O−surface) species, depending on the support material.Ethylene polymerization data with the supported catalysts show that polymerization activity is dependenton both precursor ligation [Zr(CH2Ph)4> (Me5Cp)ZrMe3] and the nature of the support (SnS > FeS > TiS).Poisoning studies were performed in conjunction with ethylene polymerization, mediated by (Me5Cp)ZrMe3 supported on each SMO, and reveal that, for (Me5Cp)ZrMe3/SnS, 61 ± 5% of the Zr sites are catalyticallysignificant, while, for (Me5Cp)ZrMe3/FeS, this quantity is 22 ± 2%, and for (Me5Cp)ZrMe3/TiS, 63 ± 9%.These catalysts are also active for benzene hydrogenation and are separable from liquid-phase productsusing physical or, in the case of FeS, magnetic techniques.
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