Synthesis and Structure of Supramolecular Compound with Ethyl 2-(4-Aminophenoxy)acetate Based on 18-Crown-6

The title ammonium compound ethyl 2-(4-aminophenoxy)acetate (C10H13NO3, I) and its crown ether inclusion complex {[(C10H14NO3)center dot(18-crown-6)]+[PF6]-, II} (18-crown-6=1,4,7,10,13,16-hexaoxacyclo-octadecane) were synthesized. The ammonium compound I was determined by 1H NMR, IR and ESI-MS techiniques. X-ray crystallography reveals that compound I crystallizes in the triclinic system with space group of P-1, all the atoms in I are almost coplanar except H, and N?H center dot center dot center dot O hydrogen bonds lead to the formation of one dimensional chain. The rotator-stator-like compound II was crystallizes in the centrosymmetric monoclinic system with space group of P21/c. The supramolecular was formed via N?H center dot center dot center dot O hydrogen-bond interactions. Temperature-dependent dielectric constants of compound II were measured.