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The Complete Delineation of the Initiation, Propagation, and Termination Steps of the Carbomethoxy Cycle for the Carboalkoxylation of Ethene by Pd–Diphosphane Catalysts
Author(s) -
Liu Jianke,
Heaton Brian T.,
Iggo Jonathan A.,
Whyman Robin
Publication year - 2003
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200352369
Subject(s) - alkene , cationic polymerization , hydride , catalysis , chemistry , copolymer , palladium , medicinal chemistry , photochemistry , computer science , combinatorial chemistry , polymer chemistry , organic chemistry , polymer , hydrogen
An elegant model : The intermediates in both the hydride and carbomethoxy cycles, and in chain transfer for carboalkoxylation of ethene and CO–alkene copolymerization have been characterized for a highly active cationic palladium–diphosphane catalyst (see scheme). In contrast to previous reports on model systems, alkene insertion into the PdC(O)OMe and PdC(O)Me bonds is found to occur at comparable rates.