Synthesis and Crystal Structures of Anhydrous Gallium(iii) Ionic Complexes With Polyether Ligands

The ionic coordination complexes [(GaCl(18-crown-6))(GaCl)] (I) and [(GaCl(diglyme))(GaCl)] (II) were synthesized and characterized by single-crystal X-ray diffraction and powder X-ray diffraction (PXRD). Compounds I and II were obtained via the reaction of GaCl with 18-crown-6 ether or diglyme, respectively, in diethyl ether. According to single-crystal X-ray diffraction data, the reaction of GaCl with macrocyclic ethers leads to the formation of ionic coordination compounds, in which the anionic component is a tetrahedral [GaCl] fragment, while the cationic part is a [GaCl(L)] complex (L = 18-crown-6 or diglyme). In both structures, the polyether ligands act as polydentate donors, coordinating to the gallium center via five oxygen atoms of 18-crown-6 in I and three oxygen atoms of diglyme in II. The phase purity of both compounds was confirmed by PXRD.