Synthesis and crystal structure of new bis(azacrown ethers) on the basis of 1,2-bis(2,2,2-trichloro-1-isocyanatoethoxy)benzene

Abstract

Synthesis, properties and X-Ray analysis of the new bis(azacrown ethers), containing bridging ureid fragments, are described. These substances have in their molecule structure both centers of anion linking (proton donating NH groups) and centers of cation linking (crown ether units) and thus may be considered as potential ion-pare receptors. © ISUCT Publishing.