- 作者: Emara, M.M. ; Abd Elbary, H.M. ; Wasfi, A.M.
- 作者服務機構: Dept. of Chemistry, Al-Azhar Univ., Nasr City, Cairo, Egypt
- 中文摘要:
The stoichiometric association constants, K, the thermodynamic association constants, K/sub A/, and the thermodynamic parameters .DELTA.S/sup 0/, .DELTA.H/sup 0/ and .DELTA.G/sup 0/, for the association between Mg(II) ion with o-, m-, and p-toluates, o-, m-, and p-chlorobenzoates, and o-, m- and p-bromobenzoates have been determined at 15.degree.C, 25.degree.C, 35.degree.C and 45.degree.C in aqueous media. Ion selective electrodes were used to measure the Mg/sup 2+/ activities.
The trends in the association behavior of Mg(II) salts of aromatic acids cannot be explained on the basis of steric effects but can be explained according to the trend of the pKa of the parent organic acids, and the Hammett function,.sigma., of the salts themselves relative to the corresponding benzoate salt. - 英文摘要: --
- 中文關鍵字: Ionic Association; Ion Selective Electrode; Thermodynamics; Magnesium Salt; Steric Effect; Inductive Effect
- 英文關鍵字: 離子締合;離子選擇電極;熱力學;鎂鹽;立體效應;誘導效應(感應效應)