Selective Interactions of Crown Ethers with Fluosilicic Complex Acids

Abstract

.One of priority goals of supramolecular chemistryis revealing selective interactions of crown ethers( hosts ) with guest species, resulting in stabiliza-tion of unstable guest species in the form of stablecrystalline inclusion compounds [7, 8]. In this connec-tion, we examined the possibility of selective syn-thesis of crystalline supramolecular complexes ofcrown ethers with fluosilicic complex acids from solu-tions of crown ethers in aqueous HF under the condi-tions of spontaneous formation of fluosilicic acid.We found that evaporation of solutions of 1,4,7,-10,13,16-hexaoxacyclooctadecane (18C6) and