Spectrophotometric determination of acidity constants of salicylaldoxime in aqueous solution at 25°C and ionic strength of 0.5 M controlled with NaCl

被引：9
|
作者：
Tshuma, Joel
Alarcon-Angeles, Georgina
Palacios-Beas, Elia
Vargas-Garcia, Roberto
Ramirez-Silva, Maria Teresa
Rojas-Hernandez, Alberto
机构：
[1] Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Area Quim Analit, Mexico City 09340, DF, Mexico
[2] Inst Politecn Nacl, ESIQIE, Dept Ingn Met, Mexico City 05700, DF, Mexico
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2007年 / 66卷 / 4-5期
关键词：
chelating agents; hydroxyoximes; oximes; acidity constants;
D O I：
10.1016/j.saa.2006.05.004
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The equilibrium constants of salicylaldoxime in water at 25 degrees C, 0.5 M of ionic strength with NaCl and concentration of 1 x 10(-4) M were determined spectrophotometrically. The spectral data were processed using SQUAD program. The salicylaldoxime in acid medium has the value of pK(a1) = 1.224 +/- 0.027. In alkaline medium the salicylaldoxime has the values of pK(a2) = 8.551 +/- 0.024 and pK(a3) = 11.728 0.016. (c) 2006 Elsevier B.V. All rights reserved.
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收藏
页码：879 / 883
页数：5
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