Departamento de Química Inorgánica, Universidad de Alcalá, 28871 Alcalá de Henares-Madrid, Spain.
Inorg Chem. 2013 May 20;52(10):6103-9. doi: 10.1021/ic400463a. Epub 2013 May 1.
Treatment of [Cl3Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}] with [K(C5Me5)] in toluene gives C10Me10 and the paramagnetic [K(μ-Cl)3Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}] (3) derivative. Crystallization of 3 in pyridine affords the potassium-free [Cl2(py)2Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}] (4) complex. Whereas the reaction of 3 with 1 equiv of 18-crown-6 leads to the molecular complex [(18-crown-6)K(μ-Cl)3Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}] (5), the analogous treatment of 3 with cryptand-222 affords the ion pair [K(crypt-222)][Cl3Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}] (6). The X-ray crystal structures of 4, 5, and 6 have been determined. Density functional theory (DFT) calculations have elucidated the electronic structure of these species, which should be regarded as containing trivalent Y bonded to the {(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)} metalloligand radical anion.
用 [K(C5Me5)] 在甲苯中处理 [Cl3Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}],得到 C10Me10 和顺磁性 [K(μ-Cl)3Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}](3)衍生物。3 在吡啶中的结晶得到无钾的 [Cl2(py)2Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}](4)配合物。虽然 3 与 1 当量的 18-冠-6 反应得到分子配合物 [(18-crown-6)K(μ-Cl)3Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}](5),但 3 与 cryptand-222 的类似处理得到离子对 [K(crypt-222)][Cl3Y{(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)}](6)。4、5 和 6 的 X 射线晶体结构已经确定。密度泛函理论(DFT)计算阐明了这些物种的电子结构,它们应被视为含有与 {(μ3-NH)3Ti3(η(5)-C5Me5)3(μ3-N)} 金属配合物自由基阴离子键合的三价 Y。