COMPLEXATION THERMODYNAMICS OF CROWN-ETHERS .5. SUBSTITUTION AND LARIAT EFFECTS UPON CATION COMPLEXATION WITH AZA-CROWN ETHERS

The effects of sidearm(s) introduced to aza-crown ethers upon their co mplexation thermodynamics and relative cation selectivities for alkali metal ions have been investigated by titration calorimetry; using the present and reported data, the complexation behaviour of several C- a nd N-pivot lariats with (3m +n)-crown-m (m = 5,6; n = 0, 1) skeletons is discussed comparatively and globally from the thermodynamic point o f view.