Pyrazolat und Tetrazolat als Brückenliganden in [Pt(pz)2]3, [Pt(pz)2]∞ und [Pt(tz)2]∞ Die Kristallstruktur von [Pt(pz)2]3 |
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| Authors: | W Burger J Strhle |
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| Institution: | W. Burger,J. Strähle |
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| Abstract: | Pyrazolat and Tetrazolat as Bridging Ligands in Pt(pz)2]3, Pt(pz)2]∞, and Pt(tz)2]∞ Crystal Structure of Pt(pz)2]3 . Pt(pz)2(Hpz)2]2 (Hpz = pyrazole) suspended in mesitylene decomposes at 185°C in a sealed tube to Pt(pz)2]3 and Pt(pz)2]∞. The reaction of K2PtCl4 with K(pz) under hydrothermal conditions at 150°C yields Pt(pz)2H2O]∞. Pt(tz)2 H2O]∞ (Htz = tetrazole) is obtained at 25°C from K2PtCl4 and Li(tz) in water. Pt(pz)2]3 crystallizes in the tetragonal space group I41/a with a = 1694.9 pm, c = 3127.5 pm and Z = 16. It forms a ring structure with the symmetry D3h. In the structure the Pt atoms are each bridged by two pyrazolato ligands. Short but nonbonding Pt? Pt distances range from 303.4 pm to 306.7 pm. The average Pt? N distance is 201 pm. |
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