Chemistry Letters, Vol.33, No.3, 214-215, 2004
Direct observation of the Li+-18-crown-6 complex working as H2O capture in acetone-water mixture
The complex formation of alkali metal ion (Li+ or Na+) with 18-crown-6 in an acetone-water mixed solvent was studied by means of the specially designed mass spectrometer. The Li+-18-crown-6 complex can hold one H2O in its cavity in the mixed solvent, whereas the Na+-18-crown-6 complex hardly holds an H2O.