Journal
DALTON TRANSACTIONS
Volume 42, Issue 20, Pages 7365-7372Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3dt32835j
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Funding
- Dutch National Research School Combination Catalysis Controlled by Chemical Design (NRSC-Catalysis)
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A transmetallation route, using silver(I) precursors, to several zero-and di-valent palladium complexes with chelating bis(N-heterocyclic carbene) ligands bearing various N-substituents has been established. The resulting complexes have been characterized by NMR and mass spectroscopy. In addition, the structure of a representative compound, [Pd-0(bis-(Mes)NHC)(eta(2)-ma)] (3a), was confirmed by X-ray crystal structure determination. In contrast to the transfer semihydrogenation, in which only low activity was observed, complex 3a showed activity (TOF = 49 mol(sub) mol(cat)(-1) h(-1)) and selectivity comparable to its monodentate counterparts in the semihydrogenation of 1-phenyl-1-propyne with molecular hydrogen.
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