作者:Mikael Kritikos、Marat Moustiakimov、Maria Wijk、Gunnar Westin
DOI:10.1039/b102798k
日期:——
The molecular and basically isostructural oxo-alkoxides Ln5O(OPri)13 (Pri = 2-propyl) with Ln = Nd (1) and Gd (2) were synthesized by metathesis of LnCl3 and KOPri, in combination with stoichiometric hydrolysis, in 2-propanol-containing solvents. Er5O(OPri)133 was obtained as co-product to an erbium aluminium 2-propoxide with an Er ∶ Al ratio of ca. 3 ∶ 1, from the reaction of 15KOPri + H2O + Al(OPri)3 with 5ErCl3, in toluene–2-propanol. The solid state structures of 1–3 were obtained by single-crystal X-ray diffraction. The characterisations were made with differential scanning calorimetric measurements, UV-Vis and FT-IR spectroscopy. The molecule contains an M5O fragment with the configuration of a square pyramid and the oxo-oxygen atom slightly above the basal plane. FT-IR measurements showed that the molecular structure of the alkoxide was retained, to a large extent, when dissolved in toluene–2-propanol (2 ∶ 1) or hexane. Investigations by UV-Vis and FT-IR spectroscopy showed that Ln5O(OPri)13 reacted with Al4(OPri)12 (Ln ∶ Al = 1 ∶ 3) in toluene–2-propanol to form LnAl3(OPri)12 within 2 hours at 80 °C.
在含 2-丙醇的溶剂中,通过 LnCl3 和 KOPri 的偏合成反应,结合化学计量水解,合成了 Ln = Nd (1) 和 Gd (2) 的 Ln5O(OPri)13(Pri = 2-丙基)氧化烷氧基化合物(分子结构基本相同)。Er5O(OPri)133 是 15KOPri + H2O + Al(OPri)3 与 5ErCl3 在甲苯-2-丙醇中反应生成的 2-丙氧基铒铝的副产品,其 Er ∶ Al 比率约为 3 ∶ 1。通过单晶 X 射线衍射获得了 1-3 的固态结构。通过差示扫描量热测量、紫外-可见光谱和傅立叶变换红外光谱分析了其特性。分子中含有一个 M5O 片段,其构型为正方形金字塔,氧原子略高于基底面。傅立叶变换红外光谱测量结果表明,当溶解在甲苯-2-丙醇(2 ∶ 1)或正己烷中时,氧化烷的分子结构在很大程度上得以保留。紫外可见光谱和傅立叶变换红外光谱的研究表明,Ln5O(OPri)13 与 Al4(OPri)12(Ln ∶ Al = 1 ∶ 3)在甲苯-2-丙醇中反应,在 80 °C 下 2 小时内生成 LnAl3(OPri)12。