Lipophilic derivatives of [2.2. 1]-and [2.2. 2] cryptands: thermodynamics of micellization of their alkali and alkaline-earth cryptates

…, GW Gokel, L Echegoyen, LE Echegoyen

Index: Lauricella, Toni L.; Lopez, Manuel; Miller, Steven R.; Echegoyen, Lourdes E.; Gokel, George W.; Echegoyen, Luis Journal of Organic Chemistry, 1991 , vol. 56, # 4 p. 1524 - 1529

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Citation Number: 3

Abstract

Critical micelle concentrations (cmc's) were measured at several temperatures in the range 8-32'C for previously unknown 2-n-C14Hm-[2.2. 1], cryptand 1, in the presence of 1 equiv of either Na+ or Ca2+. Thermodynamic parameters for micelle formation by the complexes were assessed by using the cmc dependence on temperature, AHomb. which was found to be 3.5 kJ/mol (O. &2 kcal/mol) for Na+. l,(cmc at 26" C= 0.092 mM), and 8.4 kJ/mol (2.0 ...