Efficient Heterogeneous Dual Catalyst Systems for Alkane Metathesis

Autor:	Emily Carson, Amy H. Roy MacArthur, Eleanor Rolfe, Alan S. Goldman, Maurice Brookhart, Zheng Huang, Sahar H. El-Khalafy
Rok vydání:	2010
Předmět:	Chemistry Catalyst support Polymer chemistry Organic chemistry Alkane metathesis Ring-opening metathesis polymerisation General Chemistry Metathesis Heterogeneous catalysis Pincer ligand Catalysis Acyclic diene metathesis
Zdroj:	Advanced Synthesis & Catalysis. 352:125-135
ISSN:	1615-4169 1615-4150
DOI:	10.1002/adsc.200900539
Popis:	A fully heterogeneous and highly efficient dual catalyst system for alkane metathesis (AM) has been developed. The system is comprised of an alumina-supported iridium pincer catalyst for alkane dehydrogenation/olefin hydrogenation and a second heterogeneous olefin metathesis catalyst. The iridium catalysts bear basic functional groups on the aromatic backbone of the pincer ligand and are strongly adsorbed on Lewis acid sites on alumina. The heterogeneous systems exhibit higher lifetimes and productivities relative to the corresponding homogeneous systems as catalyst/catalyst interactions and bimolecular decomposition reactions are inhibited. Additionally, using a "two-pot" device, the supported Ir catalysts and metathesis catalysts can be physically separated and run at different temperatures. This system with isolated catalysts shows very high turnover numbers and is selective for the formation of high molecular weight alkanes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9f32625b69f66776235c13f2c6681d6b https://doi.org/10.1002/adsc.200900539 Zobrazit plný text záznamu Plný text