The synthesis of new Pt3Tl complexes [Pt3μ3-Tl(diketonate)(OH2)}(μ3-CO)(μ-dppm)3][PF6]2, 2, dppm = Ph2CH2PPh2, by reversible addition of thallium(I) β-diketonates to the complex cation [Pt3(μ3-CO)(μ-dppm)3]2+, is reported. The thallium(I) units are easily displaced from platinum by halide ions Xâ (X = Cl, Br, I) to give [Pt3(μ3-CO)(μ3-X)(μ-dppm)3]+, or by SnCl3â to give [Pt3(μ3-CO)(μ3-SnCl3)(μ-dppm)3]+. With trifluoroacetate there was an equilibrium with [Pt3(μ3-CO)(μ3-O2CCF3)(μ-dppm)3]+
and [Pt3μ3-Tl(diketonate)(O2CCF3)}(μ3-CO)(μ-dppm)3]+. The structures of two Pt3Tl clusters are reported, and the Pt3Tl unit is shown to be tetrahedral.
据报道,通过将
铊(I) δ-二
酮酸盐可逆地加入到络合物阳离子 [Pt3(¼3-CO)(¼-dppm)3]2+中,合成了新的 Pt3Tl 络合物 [Pt3δ3-Tl(二
酮酸)(OH2)}(δ3-CO)(δ-dppm)3][PF6]2,2,dppm = Ph2CH2PPh2。
铊(I)单元很容易被卤化物离子 Xâ (X = Cl、Br、I)从
铂中置换出来,得到 [Pt3(δ3-CO)(δ3-X)(δ-dppm)3]+,或者被 SnCl3â 置换出来,得到 [Pt3(δ3-CO)(δ3-SnCl3)(δ-dppm)3]+。在
三氟乙酸盐中,[Pt3(δ3-CO)(δ3-O2CCF3)(δ-dppm)3]+ 和[Pt3δ3-Tl(diketonate)(O2CCF3)}(δ3-CO)(δ-dppm)3]+ 达到平衡。报告了两个 Pt3Tl 簇的结构,并显示 Pt3Tl 单元为四面体。