Electrical Conductance and Ion Pair Formation of S-Acetylthiocholine Halides in Methanol-Water Mixtures at 25 &ordm;C

Nasr H. El-Hammamy; Howaida M. El-Kashlan; Heba M. Moharem

doi:10.14233/ajchem.2013.13399

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Vol. 25 No. 4 (2013): Vol 25 Issue 4

Issue Published : November 1, 2012

This work is licensed under a Creative Commons Attribution 4.0 International License.

Electrical Conductance and Ion Pair Formation of S-Acetylthiocholine Halides in Methanol-Water Mixtures at 25 ºC

https://doi.org/10.14233/ajchem.2013.13399

Nasr H. El-Hammamy

Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt

Howaida M. El-Kashlan

Department of Physics and Chemistry, Faculty of Education,Alexandria University, Alexandria, Egypt

Heba M. Moharem

Department of Chemistry, Faculty of Science, Alexandria University, Alexandria, Egypt

Corresponding Author(s) : Howaida M. El-Kashlan

helkashlan@hotmail.com

Asian Journal of Chemistry, Vol. 25 No. 4 (2013): Vol 25 Issue 4
Article Published : November 2, 2012

Abstract

Conductance of S-acetylthiocholine halides is measured at 25 ºC in methanol-water mixtures (35.1 < D < 73.7). The conductance parameters derived from the Fuoss-Onsager conductance theory indicate that the solvation of halides decreases with the decrease of the dielectric constants until a certain minimum and then increases again. The plot of log K_A versus 1/D is found to be non-linear indicating that the equation of association cannot be applied. The association constant is analyzed using the solvent separated-ion pair model.

Keywords

Electrical conductance Ion pair formation

H. El-Hammamy, N., M. El-Kashlan, H., & M. Moharem, H. (2012). Electrical Conductance and Ion Pair Formation of S-Acetylthiocholine Halides in Methanol-Water Mixtures at 25 ºC. Asian Journal of Chemistry, 25(4), 2221–2225. https://doi.org/10.14233/ajchem.2013.13399

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References

N.H. El-Hammamy, A.I. Kawana, S.A. El-Shazly and H.M. Moharem, J. Alex. Pharm. Sci., 24, 97 (2010).
R.M. Fuoss and L. Onsager, J. Phys. Chem., 61, 668 (1957); R.M. Fuoss and L. Onsager, J. Am. Chem. Soc., 81, 2659 (1959).
N.H. El-Hammamy, A.I. Kawana, M.F. Amira and N.S. El-Sisy, Int. J. Pharm. Biol. Sci., 1, 1 (2010).
A.R. Gupta, J. Phys. Chem., 83, 23 (1979).
M. Ageno, Proc. Nat. Acad. Sci., 57, 856 (1967).
N.H. El-Hammamy, H. Sadek, A.M. Hafez and G.A. Ibrahim, J. Alex. Pharm. Sci., 23, 20 (2009).
N.H. El-Hammamy, S.A. Shazly, A.I. Kawana and F.M. Abd El-Halim, J. Chem. Soc. Pak., 13, 236 (1991).
Accasina, A.D. Aprano and R. Triolo, J. Phys. Chem., 71, 3474 (1967).
W.R. Gilkerson, J. Chem. Phys., 25, 1199 (1956).
D.F. Evans and P. Gardam, J. Phys. Chem., 73, 158 (1969).
J.E. Lind and R.M. Fuoss, J. Phys. Chem., 65, 1001 (1961).
R.W. Kunze and R.M. Fuoss, J. Phys. Chem., 67, 911 (1963).
G. Atkinsen and S. Petrucci, J. Am. Chem. Soc., 86, 7 (1964).
R.M. Fuoss, Proc. Nat. Acad. Sci. USA, 45, 807 (1959).
R. Zwanzig, J. Chem. Phys., 38, 1603 (1963).
H. Sadek and R.M. Fuoss, J. Am. Chem. Sci., 81, 4507 (1959).
J.T. Denison and J.B. Ramsay, J. Am. Chem. Soc., 77, 2615 (1955).
E.R. Nightingale, J. Phys. Chem., 62, 1381 (1959).
N.H. El-Hammamy, A.A. Hasanien, H.A. Mahmoud and F.M. Abd ElHlem, J. Chem. Soc. Pak., 8, 125 (1986).

References

N.H. El-Hammamy, A.I. Kawana, S.A. El-Shazly and H.M. Moharem, J. Alex. Pharm. Sci., 24, 97 (2010).

R.M. Fuoss and L. Onsager, J. Phys. Chem., 61, 668 (1957); R.M. Fuoss and L. Onsager, J. Am. Chem. Soc., 81, 2659 (1959).

N.H. El-Hammamy, A.I. Kawana, M.F. Amira and N.S. El-Sisy, Int. J. Pharm. Biol. Sci., 1, 1 (2010).

A.R. Gupta, J. Phys. Chem., 83, 23 (1979).

M. Ageno, Proc. Nat. Acad. Sci., 57, 856 (1967).

N.H. El-Hammamy, H. Sadek, A.M. Hafez and G.A. Ibrahim, J. Alex. Pharm. Sci., 23, 20 (2009).

N.H. El-Hammamy, S.A. Shazly, A.I. Kawana and F.M. Abd El-Halim, J. Chem. Soc. Pak., 13, 236 (1991).

Accasina, A.D. Aprano and R. Triolo, J. Phys. Chem., 71, 3474 (1967).

W.R. Gilkerson, J. Chem. Phys., 25, 1199 (1956).

D.F. Evans and P. Gardam, J. Phys. Chem., 73, 158 (1969).

J.E. Lind and R.M. Fuoss, J. Phys. Chem., 65, 1001 (1961).

R.W. Kunze and R.M. Fuoss, J. Phys. Chem., 67, 911 (1963).

G. Atkinsen and S. Petrucci, J. Am. Chem. Soc., 86, 7 (1964).

R.M. Fuoss, Proc. Nat. Acad. Sci. USA, 45, 807 (1959).

R. Zwanzig, J. Chem. Phys., 38, 1603 (1963).

H. Sadek and R.M. Fuoss, J. Am. Chem. Sci., 81, 4507 (1959).

J.T. Denison and J.B. Ramsay, J. Am. Chem. Soc., 77, 2615 (1955).

E.R. Nightingale, J. Phys. Chem., 62, 1381 (1959).

N.H. El-Hammamy, A.A. Hasanien, H.A. Mahmoud and F.M. Abd ElHlem, J. Chem. Soc. Pak., 8, 125 (1986).