Turkish Journal of ChemistryEnantioselective complexation of chiral lariat crown ethers and chiral primary alkylammonium perchlorates
Şafak Özhan KOCAKAYA2, Halil HOŞGÖREN2
1Department of Physics, Faculty of Science, Dicle University, Diyarbakır-TURKEY
2Department of Chemistry, Faculty of Science, Dicle University, Diyarbakır-TURKEY
Abstract: In order to investigate the enantiomeric recognition abilities toward 2 chiral alkylammonium perchlorates (AmI, AmII) by 1H-NMR titration method in CDCl3, 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 KR/KS 6.58 and KS/KR 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.
Key Words: Chiral lariat crown ethers, enantioselectivity, complexation properties, molecular recognition, NMR titration
Turk. J. Chem., 35, (2011), 171-179.
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Other articles published in the same issue: Turk. J. Chem.,vol.35,iss.2.