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|Type:||Artigo de evento|
|Title:||On The Interaction Of Schrock Mo-alkylidene Complexes With The Surface Of Inorganic Oxides|
|Abstract:||This work describes the reactivity of Schrock-type alkylidenemolybdenum(VI) complexes, Mo(= CHCPhMe2)(= NAr)(O(t)Bu)2, I, or Mo(= CHCPhMe2)(= NAr)[OCMe(CF3)2]2, II, with the surface of silica, silica-alumina and niobia. In situ FT-IR studies suggest that I and II are attached to the surface of silica via a Lewis acid base adduct; on silica-alumina, an OH addition to the Mo=N bond seems to take place. Grafting of I and II causes a decrease in their intrinsic catalytic activity as well as a change in the stereoselectivity of II in ROMP of norbornene. (C) 2000 Elsevier Science B.V.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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