Abstract: N-Tosylethylenediamine reacted with appropriate polyglycol diiodide to give N-(2-to-sylamidoethyl)-monoaza-12-crown-4 (1) and-15-crown-5(2),but could not give-18-crown-6(3),which was obtained by the reaction of N-(2-tosylamidoethyl) diethanolamine (7) with tetraethyleneglycol ditosylate(8).The single crystal of 1 growing up from methanol solution belongs to monoclinic crystal system.The crystallographic data are;space group P2₁/a,a=1.4229(1) nm,b=0.9595(2) nm,c=1.4564(1) nm,β=102.20(1)°,V=1.9435 nm³,Z=4.The crystal structure was solved by the direct method in the packing of SDPstructure analyst-program.The refinement was carried out by the full-matrix least-square and the final Ris 0.043.The result shows the molecular configuration of 1,in which the ionizable tosylamide group was supported over the macrocyclic cavity by the ethylene group,is analogous to a desk lamp.

Key words: Monoazacrown ethers, Larait crown ethers, Synthesis, Crystal structure