Di- and trinuclear metal complexes containing a .BETA.-diketonate dianion as a bridging ligand.

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The dinuclear palladium(II) complexes [(PP)Pd(C1–C3-β-dik(2−)-O,O′)Pd(PP)](ClO4)2 containing a β-diketonate dianion as a bridging ligand were prepared by the reactions of the mononuclear complexes [Pd(β-dik(2−)-C1–C3)(PP)] with [Pd(PP)(H2O)2](ClO4)2. In the reactions of [Pd(etac(2−)-C1–C3)(dpe)] with [Pt(PPh3)2(H2O)2](ClO4)2 and [Ni(acac)2] in the 1:1 mole ratio, similar dinuclear complexes [(dpe)Pd(C1–C3-etac(2−)-O,O′)Pt(PPh3)2](ClO4)2 and [(dpe)Pd(C1–C3-etac(2−)-O,O′)Ni(acac)2] were produced, respectively, while the reactions of [Pd(β-dik(2−)-C1–C3)(PP)] with Ni(ClO4)2·6H2O and Mg(ClO4)2 in the 2:1 mole ratio afforded the trinuclear complexes [M{O,O′-β-dik(2−)-C1–C3Pd(PP)}2](ClO4)2 (M=Ni(II) and Mg(II)). The trihapto coordination to palladium(II) and O,O′-chelation to another metal atom of the β-diketonate dianion in these complexes were deduced mainly by IR and NMR spectroscopy.
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