THE COMPLEXING ABILITY OF CROWN-ETHERS INCORPORATING GLUCOSE

The complexing (in CHCl3) and extracting abilities of 18-crown-6 type compounds (1-15) were measured with Li, Na, K and NH4 cations. The sub stituents on the sugar part affected these properties significantly (K -a = 10(3)-10(7)). Some substituents, like acetyloxy groups (3) decrea sed whereas others, like tosyloxy groups (10, 11) significantly increa sed the complexing ability and thus changed the selectivity. The compo und with four tosyloxy groups (11) shows an excellent picrate salt ext racting ability in a CH2Cl2-water system.