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Issue 46, 2006
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Dinuclear palladium(II) compounds with bridging cyclometalated phosphines. Synthesis, crystal structure and electrochemical study

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Abstract

The structural characterization of bis-cyclometalated palladium(II) compounds of formula Pd2[(µ-(C6X4)PPh2]2(µ-O2CR)2 [X = H, R = CH3 (3), CF3 (4), C(CH3)3 (5) and C6F5 (6); X = F, R = CH3 (7) and CF3(8)], has confirmed its paddle wheel structure with two palladium atoms bridged by two acetates and two metalated phosphines in a head-to-tail arrangement. The Pd⋯Pd distances are in the range 2.6779(16)–2.7229(8) Å. Under cyclic voltammetric conditions, compounds 3–6, in CH2Cl2 solution, were found to undergo a reversible oxidation peak in the range of potential values 0.84–1.25 V. A second partially-reversible oxidation is observed at more positive potentials (1.37–1.55 V). For compounds 3–5 in the presence of chlorides, the first oxidation becomes a two-electron process presumably leading to a neutral [Pd(III)–Pd(III)] species with a metal–metal bond.

Graphical abstract: Dinuclear palladium(ii) compounds with bridging cyclometalated phosphines. Synthesis, crystal structure and electrochemical study

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Publication details

The article was received on 10 Jul 2006, accepted on 21 Sep 2006 and first published on 03 Oct 2006


Article type: Paper
DOI: 10.1039/B609829K
Citation: Dalton Trans., 2006,0, 5536-5541
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    Dinuclear palladium(II) compounds with bridging cyclometalated phosphines. Synthesis, crystal structure and electrochemical study

    I. O. Koshevoy, P. Lahuerta, M. Sanaú, M. A. Ubeda and A. Doménech, Dalton Trans., 2006, 0, 5536
    DOI: 10.1039/B609829K

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