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.

引用

页码：879 / 883

页数：5

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