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New Hybrid Bidentate Ligands as Precursors for Smart Catalysts

机译：新型混合双齿配体作为智能催化剂的前体

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摘要

1-Phosphanorbornadiene derivatives were grafted onto various periodically organized mesoporous powders,including a new zircoma/silica mixed oxide synthesized by aerosol techniques After complexation with the [Rh(CO)_2]~+ fragment,these materials were revealed to be more active in olefin hydrogenation than their homogeneous counterparts The reasons for this higher activity are discussed in the light of theoretical modeling Various surface treatments,such as estenfication,drying,and functionahzation with PhSi(OEt)_3,provided insights into the nature and mechanism of formation of the active species Zircomabased materials were found to be active in internal olefin hydroformylation Investigation of the mechanism of this reaction shows that the isomeriza tion step is catalyzed by the Lewis acidic support whereas the hydrofor-mylation step is driven by the rhodium catalyst Dissociation of these two steps leads to enhancement of activity.
机译：将1-膦基降冰片二烯衍生物接枝到各种周期性组织的介孔粉末上，包括通过气溶胶技术合成的新型锆石/二氧化硅混合氧化物与[Rh（CO）_2]〜+片段络合后，发现这些材料在烯烃中更具活性与均相反应相比，氢化作用更高。根据理论模型讨论了这种活性较高的原因。各种表面处理，例如酯化，干燥和用PhSi（OEt）_3官能化，提供了对活性成分的性质和形成机理的见解。氧化锆基物质在内部烯烃加氢甲酰化中具有活性。对该反应机理的研究表明，异构化步骤是由路易斯酸性载体催化的，而加氢甲酰化步骤是由铑催化剂驱动的。这两个步骤的解离导致增强活动。

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