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Crown-Ether-Like Structures Derived from a Ti8O8(Carboxylate)16 Metallacycle

机译:Ti8O8(羧酸盐)16金属双环衍生物衍生的类似冠醚的结构

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Mixed-metal clusters have been obtained from the reaction of titanium alkoxides with either strontium or lead acetate and methacrylic acid. The structures of the clusters are derived from the metallacycle Ti_8O_8(methacrylate)_(16). The Sr and Pb atoms in Sr_2Ti_8O_8X_2(OOCMe)_2(methacrylate)_(16) (X: acetate or OiPr) and Pb_2Ti_8O_8(OBu)_2X_2(methacrylate)_(16)(BuOH)_2 (X: acetate or methacrylate) occupy the central cavity of the Ti_8O_8 ring. In addition to the crown-ether-like coordination of the ring oxygen atoms to the Sr or Pb atoms, bridging carboxylate ligands support the coordination of the latter atoms. In the compound Pb_2Ti_6O_5(OiPr)_3X(methacrylate)14 (X: OiPr or methacrylate), the lead atoms are coordinated by a fragment of the Ti_8O_8(methacrylate)_(16) metallacycle.
机译:从钛的醇盐与锶或乙酸铅和甲基丙烯酸的反应中获得了混合金属簇。团簇的结构衍生自金属环Ti_8O_8(甲基丙烯酸酯)_(16)。 Sr_2Ti_8O_8X_2(OOCMe)_2(甲基丙烯酸酯)_(16)(X:乙酸盐或OiPr)和Pb_2Ti_8O_8(OBu)_2X_2(甲基丙烯酸酯)_(16)(BuOH)_2(X:乙酸盐或甲基丙烯酸酯)中的Sr和Pb原子占据Ti_8O_8环的中心腔。除了环氧原子与Sr或Pb原子的冠醚样配位以外,桥接的羧酸盐配体还支持后者的配位。在化合物Pb_2Ti_6O_5(OiPr)_3X(甲基丙烯酸酯)14(X:OiPr或甲基丙烯酸酯)中,铅原子由Ti_8O_8(甲基丙烯酸酯)_(16)金属环的片段配位。

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