| Popis: |
Chemistry Department, Faculty of Science, Alexandria University, Egypt E-mail : nasrelhammamy@yahoo.com Chemistry Department, Faculty of Education, Alexandria University, Egypt Manuscript received 20 June 2011, revised 07 March 2012, accepted 14 March 2012 The conductance of s-acetylthiocholine halides and perchlorate has been measured in acetonitrile at 35 ºc. The data were analyzed using the Fuoss-Onsager equation for 1 : 1 associated electrolytes. A0 (equivalent conductance at infinite dilution), aº(contact distance of approach) and KA (association constant) were computed. KA values were analyzed on the basis of the solvent separated-ion pair model. The electrostatic Stokes' radii (R+ + R-) were calculated and their sum was compared with the value of aº favoring the above model. |
