Interaction of 18-crown-6 with yttrium chloride: inner-sphere transformations of complexes under conditions of solid-state thermolysis
作者:Zh. V. Dobrokhotova、S. P. Petrosyants、A. B. Ilyukhin、V. M. Novotortsev
DOI:10.1007/s11172-012-0287-z
日期:2012.11
The reactions of [YCl2(H2O)6]Cl with 18-crown-6 in aliphatic alcohol solutions afford the complexes [Y(H2O)3(18-crown-6)]Cl3·1.25H2O (1) and [Y(H2O)8]Cl3·(18-crown-6)·4H2O (2), in which the inner coordination sphere of yttrium consists of nine and eight oxygen atoms, respectively. The inner-sphere transformations of complexes 1 and 2 under conditions of solid-state thermolysis were investigated. After the removal of coordinated water molecules from compound 1, the complex undergoes a structural transformation at temperatures above 180 °C, resulting in that two chloride anions enter into the coordination sphere of yttrium. For compound 2, a double exothermic effect is observed in the temperature range of 160–300 °C due to the formation of a certain new structural species containing chloride ions and 18-crown-6 in the inner coordination sphere.
[YCl2(H2O)6]Cl与18-冠-6在脂肪醇溶液中的反应生成[Y(H2O)3(18-冠-6)]Cl3·1.25H2O (1)和[Y(H2O)8]Cl3·(18-冠-6)·4H2O (2)的络合物,其中钇的内配位层分别由九个和八个氧原子组成。研究人员研究了在固态热解条件下络合物1和2的内层转变。从化合物1中除去配位水分子后,络合物在180℃以上的温度下发生结构转变,导致两个氯阴离子进入钇的配位层。对于化合物2,在160-300℃的温度范围内观察到双重放热效应,这是由于在内配位层中形成了含有氯离子和18-冠-6的某种新结构。