Hybrid Crown Ether Ligands with Disiloxane Units and Their Complexes with Small s-Block Ions

Herein, we present hybrid crown ether ligands with siloxane and ethylene oxide units and their coordination with the cations Li+, Na+, Mg2+ and Ca2+. The compounds prepared are (SiMe2O)2(C2H4O)3 (1, TrEGDS = Triethylenglycoldisiloxane) and (SiMe2O)2(C2H4O)4 (2, TeEGDS = Tetraethylenglycoldisiloxane)), as well as the metal complexes [Li(TrEGDS][GaI4] (3), [Na(TeEGDS)][GaI4] (4), [Mg(TrEGDS)][GaI4]2 (5) and [Ca(TeEGDS)][GaI4]2 (6). Single-crystal X-ray diffraction was used to study the prepared complexes and coordination modes in the solid state.