Analysis of complexation between new bidentate bis-NHC ligand and some metal cations at different temperature

Analytical Methods in Environmental Chemistry Journal Pub Date : 2022-06-28 DOI:10.24200/amecj.v5.i02.169

Nur Rahimah Said, M. Rezayi, N. S. Abdul Manan, A. Sahebkar, Y. Alias

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Abstract

In this research, the determination and complexation process between 3,3'-(2,2'-(4-methyl-phenylenesulfonamido)bis(ethane-2,1-diyl))bis(1-benzyl-3H-benzo[d]imidazol-1-ium)dibromide with Ni2+, Zn2+, Pd2+, Ag+, and Hg2+ cations in the binary mixture of methanol (MeOH) and water (H2O) at different temperatures (15, 25, 35 and 45ºC) were studied using a conductometric method. The results show that the stoichiometry of the complexes in all binary mixed solvents for Ni2+, Zn2+, and Pd2+ were 1:1 (M:L), while in other cases 1:2 (M:L) and 2:1(M:L). The stability constants (log ) of complex formation have been determined by fitting molar conductivity curves using a computer program (GENPLOT). The obtained data shows that in the pure methanol solvent system, the stability order is Ni2+< Pd2+

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新型双齿双nhc配体与某些金属阳离子在不同温度下的络合分析

研究了在不同温度(15、25、35、45℃)下，3,3′-(2,2′-(4-甲基-苯磺酸胺)-(乙烷-2,1-二基)-(1-苄基- 3h -苯并[d]咪唑-1-ium)二溴化物与Ni2+、Zn2+、Pd2+、Ag+、Hg2+等阳离子在甲醇(H2O)二元混合物中的测定及络合过程。结果表明，Ni2+， Zn2+和Pd2+在所有二元混合溶剂中的配合物的化学计量量为1:1 (M:L)，而在其他情况下为1:2 (M:L)和2:1(M:L)。利用计算机程序(GENPLOT)拟合摩尔电导率曲线，确定了复杂地层的稳定常数(log)。所得数据表明，在纯甲醇溶剂体系中，络合过程的稳定顺序为Ni2+< Pd2+

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