Dipotassium Complex of Per-3,6-anhydro-β-cyclodextrin

摘要

Mass spectrometric evidence that per-3,6-anhydro-β-cyclodextrin (3) binds preferentially with potassium ions has been presented. Significantly, X-ray crystallographic analysis of crystals isolated from a synthesis employing KOH reveals that, in the solid state, the cyclodextrin derivative 3 assumes a highly distorted conformation and that it binds two potassium ions within its cavity. The 2:1 complexes assemble to form trimeric "clover leaf" aggregates.