Using the Extension Coordination Model to reproduce the Enthalpies of Transfer of Tetraethylurea From Water to Aqueous Ethanol, Propan-1-ol and Acetonitrile at 298 K.

G. Rezaei Behbehani,1,2 E. Tazikeh 2 and A. A. Saboury 3

1Department of Chemistry, Islamic Azad University, Takastan, Iran
2Department of Chemistry, Imam Khomeini International University Qazvin Iran,,
3Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.

The enthalpies of transfer of tetraethylurea, TEU, from water to aqueous ethanol, EtOH, propan-1-ol, PrOH, and acetonitrile, MeCN, are reported and analysed in terms of the Extension Coordination Model. The analyses show that the solvation of TEU is random in the considered solvent mixtures. It is also found that TEU interact more strongly with EtOH or PrOH than water.

Key words: titration calorimeter, preferential solvation, tetraethylurea