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Anionic Palladium(0) and Palladium(II) Ate Complexes

Anionic Palladium(0) and Palladium(II) Ate Complexes

Marlene Kolter, Katharina Böck, Konstantin Karaghiosoff, Konrad Koszinowski

Angew Chem Int Ed Engl. 2017 Oct 16;56(43):13244-13248.

PMID: 28817225

Abstract:

Palladium ate complexes are frequently invoked as important intermediates in Heck and cross-coupling reactions, but so far have largely eluded characterization at the molecular level. Here, we use electrospray-ionization mass spectrometry, electrical conductivity measurements, and NMR spectroscopy to show that the electron-poor catalyst [L3 Pd] (L=tris[3,5-bis(trifluoromethyl)phenyl]phosphine) readily reacts with Br- ions to afford the anionic, zero-valent ate complex [L3 PdBr]- . In contrast, more-electron-rich Pd catalysts display lower tendencies toward the formation of ate complexes. Combining [L3 Pd] with LiI and an aryl iodide substrate (ArI) results in the observation of the PdII ate complex [L2 Pd(Ar)I2 ]- .

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP7790387	Palladium(II) iodide		7790-38-7	Price

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