Stojnova Kirila, Racheva Petya, Divarova Vidka, Bozhinova Kristina, Lekova Vanya
Acta Chim Slov. 2016;63(3):654-60. doi: 10.17344/acsi.2016.2513.
The complex formed between an anionic chelate of Mo(VI)-3,5-dinitrocatechol (3,5-DNC) with the cation of 3,3'-(3,3'-dimethoxy-4,4'-biphenylene)bis(2,5-diphenyl-2H-tetrazolium chloride) (Blue Tetrazolium Chloride, BTC) in the liquid-liquid extraction system Mo(VI)-3,5-DNC-BTC-H2O-CHCl3 was studied. The optimum conditions for the complex formation and extraction of the ion-associated complex were established by spectrophotometry. The molar ratio of the reagents was determined by independent methods. The validity of Beer's law was checked and some analytical characteristics were calculated. The association process in aqueous phase and the extraction equilibria were investigated and quantitatively characterized. The following key constants of the processes were calculated: association constant, distribution constant, extraction constant and recovery factor. Based on this, a reaction scheme, a general formula and a structure of the complex were suggested.
研究了钼（VI）-3,5-二硝基邻苯二酚（3,5-DNC）的阴离子螯合物与3,3'-（3,3'-二甲氧基-4,4'-亚联苯基）双（2,5-二苯基-2H-氯化四唑）（蓝四氮唑，BTC）的阳离子在液-液萃取体系Mo（VI）-3,5-DNC-BTC-H₂O-CHCl₃中形成的配合物。通过分光光度法确定了配合物形成和离子缔合物萃取的最佳条件。用独立方法测定了试剂的摩尔比。检验了比尔定律的有效性并计算了一些分析特性。研究了水相中的缔合过程和萃取平衡并进行了定量表征。计算了该过程的以下关键常数：缔合常数、分配常数、萃取常数和回收率。在此基础上，提出了配合物的反应方案、通式和结构。
