EQUILIBRIUM STUDIES OF 2,2′-(5-BROMO-6-METHYLPYRIMIDINE-2,4-DIYL)BIS(AZANEDIYL) DIPROPANOIC ACID WITH SOME TRANSITION-METAL IONS IN AQUEOUS SOLUTION

被引：0
|
作者：
Sajadi, Seyed A. A. [1 ]
Bagherzadeh, Ghodsieh [2 ]
Khaleghian, Marzieh [1 ]
Mirbagheri, Maryam [1 ]
Safaie, Hosein [2 ]
机构：
[1] Sharif Univ Technol, Inst Water & Energy, Tehran, Iran
[2] Birjand Univ, Dept Chem, Birjand, Iran
来源：
QUIMICA NOVA | 2014年 / 37卷 / 05期
关键词：
divalent metal ions; potentiometric titration; acidity and stability constants; TERNARY COMPLEXES; ADENOSINE; STABILITIES; DERIVATIVES; TRYPTOPHAN; GUANOSINE; INOSINE; AMP(2-);
D O I：
10.5935/0100-4042.20140144
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The stability constants of the 1:1 complexes formed between M2+ (M2+: Mn2+, Ni2+, Cu2+, or Cd2+) and BMADA(2-) (BMADA: 2,2'-(5-bromo-6- methylpyrimidine-2,4 diyl)bis(azanediyl)dipropanoic acid) were determined by potentiometric pH titration in aqueous solution (I = 0.1 mol L-1, NaNO3, 25 degrees C). The stability of the binary M-BMADA complexes is determined by the basicity of the carboxyl or amino groups. All the stability constants reported in this work exhibit the usual trend, and the order obtained was Mn2+ < Ni2+ < Cu2+ > Cd2+. The observed stability order for BMADA approximately follows the Irving-Williams sequence. In the M-BMADA complexes, the M ion is able to form a macrochelate via the pyrimidine group of BMADA.
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页码：896 / 899
页数：4
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