Title of article :
Enantioselective complexation of chiral lariat crown ethers and chiral primary alkylammonium perchlorates
Author/Authors :
KÖYLÜ, M. Zafer Dicle University - Faculty of Science - Department of Physics, TURKEY , ARAL, Tarık Dicle University - Faculty of Science - Department of Chemistry, TURKEY , KARAKAPLAN, Mehmet Dicle University - Faculty of Science - Department of Chemistry, TURKEY , KOCAKAYA, Safak Özhan Dicle University - Faculty of Science - Department of Chemistry, TURKEY , HOSGÖREN, Halil Dicle University - Faculty of Science - Department of Chemistry, TURKEY
Abstract :
In order to investigate the enantiomeric recognition abilities toward 2 chiral alkylammonium perchlorates (AmI, AmII) by 1H-NMR titration method in CDCl_3, 4 chiral lariat ethers 8-11 with a (p- methoxyphenoxy) methyl flexible side arm were used. The most effective enantiomeric recognition was obtained by LCEs 9 and 11 toward AmII, by K_R/K_S 6.58 and K_S/K_R 6.63, respectively. The effect of macroring size, subunit of macroring, and side arm appeared to have strong influence on the binding ability of these alkylammonium ions.
Keywords :
Chiral lariat crown ethers , enantioselectivity , complexation properties , molecular recognition , NMR titration
Journal title :
Turkish Journal of Chemistry
Journal title :
Turkish Journal of Chemistry
