SnCl4 Complexation with Polyether Ligands: Crystal Structures of [SnCl4(diglyme)], [SnCl4(H2O)2]3·2(15-crown-5) and [SnCl4(15-crown-5)]2·Et2O

The complexes of SnCl4 with diglyme and 15-crown-5 polyethers, namely [SnCl4(diglyme)] (I), [SnCl4(H2O)2]3·2(15-crown-5) (II) and [SnCl4(15-crown-5)]2·Et2O (III), were obtained and characterized by single crystal X-ray diffraction (scXRD) analysis. The compounds I and III were additionally characterized by powder X-ray diffraction, thermal and elemental analyses. The crystal structures of I and III are composed of discrete [SnCl4(diglyme)] and [SnCl4(15-crown-5)] molecules, respectively. In these structures, the polyethers act as bidentate ligands, completing the octahedral environment of tin(IV). The crystal structure of II comprises the cis- and trans-SnCl4(H2O)2 isomers, which form a hydrogen bonded network with 15-crown-5 molecules and chloride ligands through coordinated water molecules.