Synthesis of Palladium(II) and Platinum(II) Complexes with Crown Ether Phosphane Ligands: Stille Coupling of Aryl Iodides in Water

The crown ether phosphanes PAr*Ph2 (1) and PAr*2R [Ar* = 3,4‐(18‐crown‐6)‐phenyl; R = Me (2); R = Ph (3)], prepared from PCl2R and Ar*Li, have been studied. The syntheses and characterization of their oxides (4–6), and their BH3 (7–9), PdCl2 (10–12), and PtCl2 (13–15) complexes are reported. The mol...

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Published in:European Journal of Inorganic Chemistry 2005-04, Vol.2005 (8), p.1468-1476
Main Authors: Fresneda, Jorge, de Jesús, Ernesto, Gómez-Sal, Pilar, López Mardomingo, Carmen
Format: Article
Language:English
Subjects:
Aqueous-phase catalysis
C-C coupling
Crown compounds
Palladium
Phosphane ligands
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Summary:The crown ether phosphanes PAr*Ph2 (1) and PAr*2R [Ar* = 3,4‐(18‐crown‐6)‐phenyl; R = Me (2); R = Ph (3)], prepared from PCl2R and Ar*Li, have been studied. The syntheses and characterization of their oxides (4–6), and their BH3 (7–9), PdCl2 (10–12), and PtCl2 (13–15) complexes are reported. The molecular structure of the borane complex PAr*2Ph·BH3 (9) has been determined by X‐ray structural analysis. Spectroscopic data suggest that phosphanes 1–3 have similar electronic properties and steric requirements to the corresponding phenylphosphane ligands PPh2Me and PPh3. Crown ether methylphosphane 2 and its complexes are remarkably water soluble, but 1 and 3 are only slightly soluble. Palladium(II) complexes 14 and 15 have been tested as catalysts in the Stille coupling of phenyltrichlorostannanes and aryl iodides in water. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
ISSN:1434-1948
1099-0682
DOI:10.1002/ejic.200400906