Equilibrium Studies of Dibutyltin(IV)witterionic Buffer Complexation

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• 作者：M. A. El-Gahami (1) (2)
  H. M. Albishri (1)
  
• 关键词：Equilibrium studies ; Dibutyltin(IV) complexes ; ood buffers/li> Effect of solvent and temperature ; Thermodynamic parameters
• 刊名：Journal of Solution Chemistry
• 出版年：2013
• 出版时间：October 2013
• 年：2013
• 卷：42
• 期：10
• 页码：2012-2024
• 全文大小：
• 作者单位：M. A. El-Gahami (1) (2)
  H. M. Albishri (1)
  
  1. Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 8020, North Jeddah, Kingdom of Saudi Arabia
  2. Department of Chemistry, Faculty of Science, Assiut University, Assiut, Egypt
  
• ISSN：1572-8927

文摘

Equilibrium studies in aqueous solution are reported for dibutyltin(IV) (DBT) complexes of the zwitterionic buffers ood buffersMes and Mops. Stoichiometric and formation constants of the complexes formed were determined at different temperatures and ionic strength 0.1mol1 NaNO3. The results show that the best fit of the titration curves were obtained when the complexes ML, MLH1, MLH2 and MLH3 were considered beside the hydrolysis product of the dibutyltin(IV) cation. The thermodynamic parameters o, o and o calculated from the temperature dependence of the formation constant of the dibutyltin(IV) complexes with 2-(N-morpholino)ethanesulfonic acid (Mes) and 3-(N-mor-pholino)-propanesulfonic acid (Mops) were investigated. The effect of dioxane as a solvent on the formation constants of DBTes and DBTops complexes decrease linearly with the increase of dioxane proportion in the medium. The concentration distribution of the various complexes species was evaluated as a function of pH.