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Issue 20, 2005
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Routes to unique palladium A-frame complexes with a bridging fluoro-ligand

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Abstract

Treatment of a toluene solution of [PdMe2(Cy2PCH2PCy2)] (1) with pentafluoropyridine in the presence of traces of water affords the generation of the A-frame complexes [(PdMe)2{μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][SiMeF4] (2a) and [(PdMe)2{μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][OC5NF4] (2b). If the reaction is performed in an NMR tube equipped with a PFA inliner, complex 2b is produced, only. Treatment of 1 with pentafluoropyridine in the presence of an excess water yields the pyridyloxy complex [PdMe(OC5NF4)(Cy2PCH2PCy2)] (3). Compound [(PdMe)2{μ-κ2(P,P)Cy2PCH2PCy2}2(μ-F)][FHF] (2c) bearing a bifluoride anion instead of SiMeF4 or OC5NF4 can be generated by reaction of 1 with substoichiometric amounts of Et3N·3HF. The analogous complex [(PdMe)2{μ-κ2(P,P)Ph2PCH2PPh2}2(μ-F)][FHF] (5c) has been synthesized by addition of Ph2PCH2PPh2 to a solution of [PdMe2(Me2NCH2CH2NMe2)] (4) in THF and subsequent treatment of the reaction mixture with Et3N·3HF. The structure of the A-frame complex 5c has been determined by X-ray crystallography.

Graphical abstract: Routes to unique palladium A-frame complexes with a bridging fluoro-ligand

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Publication details

The article was received on 24 Jun 2005, accepted on 27 Jul 2005 and first published on 25 Aug 2005


Article type: Paper
DOI: 10.1039/B509032F
Citation: Dalton Trans., 2005,0, 3331-3336

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    Routes to unique palladium A-frame complexes with a bridging fluoro-ligand

    T. Braun, A. Steffen, V. Schorlemer, B. Neumann and H. Stammler, Dalton Trans., 2005, 0, 3331
    DOI: 10.1039/B509032F

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