Determination of Solvatochromic Regression Coefficients for the Molybdenum(VI) Complex with Ethylenediamine-N,N '-diacetic Acid by Using Kamlet-Abboud-Taft Equation

作者：Majlesi Kavosh^*

来源：Chinese Journal of Chemistry, 2010, 28(10): 1973-1977.

DOI：10.1002/cjoc.201090329

• solvent effects
• molybdenum
• Kamlet-Abboud-Taft
• methanol
• ethylenediamine-N,N '-diacetic acid

The Solver, Microsoft Excel 2000 powerful optimization package, has been used to perform non-linear least-squares curve fitting on the basis of Gauss-Newton method for the calculation of solvatochromic regression coefficients for the complexation of molybdenum(VI) with ethylenediamine-N,N'-diacetic acid and dissociation constants at 25 degrees C and constant ionic strength 0.1 mol center dot L(-1) sodium perchlorate in different aqueous solutions of methanol. A combination of potentiometric and UV spectrophotometric methods have been used for experimental studies. Non specific and specific solute-solvent interactions were interpreted by correlating the equilibrium data with solvent parameters using the Kamlet-Abboud-Taft solvatochromic equation. Finally the influence of the solvent on the stability of the complex was discussed on the basis of the correlation results and the contribution of a (hydrogen-bond donor acidity), beta (hydrogen-bond acceptor basicity) and pi* (dipolarity/polarizability) parameters.

• 出版日期2010-10