INOR 700 |
| A kinetically precipitated sandwich tri-palladium complex, [PdII3P2W18O68]12-, is proposed to be the precursor of a recently reported terminal palladium-oxo compound. Because this tri-palladium complex undergoes rapid, stepwise loss of Pd(II) in solution, no structural determination had been made. We now report two crystalline forms of this postulated sandwich tri-palladium structure, K12[Pd3P2W18O68]•20H2O (K1), Cs7K5[Pd3P2W18O68]•18H2O (CsK1), and their crystal structures. K1 crystallizes in triclinic P-1, with a = 12.4963(10) Å, b = 15.7787(13) Å, c = 23.6600(19) Å, α = 81.443(2)º, β = 86.926(1)º, γ = 70.900(2)º, V = 4359.2(6) Å3, Z = 2, and CsK1 crystallizes in triclinic P-1, with a = 13.1124(13) Å, b = 17.9240(18) Å, c = 19.687(2) Å, α = 96.873(2)º, β = 91.089(2)º, γ = 105.602(2)º, V = 4418.1(8) Å3, Z = 2. Both complexes have been further characterized by FT-IR, thermogravimetric analysis, differential scanning calorimetry, and other techniques. |
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Polyoxometalates and Related Clusters in Chemistry and Nanoscience
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Inorganic Chemistry |