Diametrically opposite trends in alkene insertion in late and early transition metal compounds: relevance to transition-metal-catalyzed polymerization of polar vinyl monomers.


Variable-temperature 1H NMR studies of the reaction of cationic (alpha-diimine)Pd-alkyl complexes with alkenes are presented. The studies reveal that vinyl bromide coordinates to the Pd(II)-Me complex followed by migratory insertion and beta-bromo elimination, to generate free propene. Propene further reacts to give beta-agostic Pd(II)-tert-butyl species… (More)


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