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首页> 外文期刊>International Research Journal of Pure and Applied Chemistry >Distribution of Cu(II) between Buffered Aqueous Phases and Organic Phases Containing N,N’-ethylenebis(4-propionyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine (H2PrEtP) in Chloroform
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Distribution of Cu(II) between Buffered Aqueous Phases and Organic Phases Containing N,N’-ethylenebis(4-propionyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine (H2PrEtP) in Chloroform

机译：含N，N'-亚乙基双（4-丙酰基-2,4-二氢-5-甲基-2-甲基-3苯基-吡唑-3-酮亚胺（H2PrEtP）的缓冲水相与有机相之间的Cu（II）分布氯仿

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Complexation of Copper (II) ions from aqueous media into chloroform solution of N,N’-ethylenebis(4-propionyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-oneimine) (H2PrEtP) Schiff base in chloroform was studied. Effect of various parameters for the extraction such as pH of aqueous media, concentration of the ligands and concentration of Cu(II) were all investigated alongside the synergistic effect of 4-propionyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one (HPrP) under a well-defined extraction condition. Complexation of Copper (II) ions was found to be highly dependent on pH of aqueous media and occurred more readily in acidic media. Single ligand complexation gave a pH? (pH at which 50% extraction occurred) of 4.57 with the partition coefficient statistically determined to be LogDCuH2PrEtP 1.56±0.01 and extraction constant (Log Kex) CuH2PrEtP -3.25±0.10. Complexation with mixed ligand system gave a pH? of 3.0, partition coefficients LogDCuH2PrEtP/HPrP of 1.70±0.05 and extraction constant Log KexCuH2PrEtP/HPrP of -3.12±0.10 showing that the complexetion of Cu(II) was slightly higher in the mixed ligands system. Optimum concentration of 3.5×10-2M H2PrEtP which gave 97.61% E was observed on varying the ligand concentration in the absence of the synergist while in the presence of the synergist, optimum concentration of 4.0×10-2 M which corresponds to 98.53% E was observed for the main ligand. Variation in synergist concentration gave optimum result of 97.85% E at 2.25×10-2 M HPrP. Analysis of slope was used to predict stoichiometry of the extraction reactions and to propose extracted metal complexes structure in both single and mixed ligands system as Cu(HPrEtP)o and Cu(HPrEtP.HPrP)o respectively.
机译：来自水介质的铜（II）离子络合到N，N'-乙撑双（4-丙酰基-2,4-二氢-5-甲基-2-苯基-3H-吡唑-3-酮亚胺）（H2PrEtP）的氯仿溶液中研究了氯仿中的席夫碱。除了4-丙酰基-2,4-二氢-5-甲基-2-苯基的协同作用外，还研究了各种参数对萃取的影响，例如水性介质的pH，配体的浓度和Cu（II）的浓度。 -3H-吡唑-3-酮（HPrP）在明确定义的提取条件下。发现铜（II）离子的络合高度依赖于水性介质的pH，并且在酸性介质中更容易发生。单配体络合产生pH值？ （提取发生50％的pH）为4.57，分配系数经统计确定为LogDCuH2PrEtP 1.56±0.01，提取常数（Log Kex）CuH2PrEtP -3.25±0.10。与混合配体体系的络合得到pH值？在3.0的情况下，分配系数LogDCuH2PrEtP / HPrP为1.70±0.05，萃取常数Log KexCuH2PrEtP / HPrP为-3.12±0.10，表明混合配体体系中Cu（II）的络合度稍高。在不存在增效剂的情况下，通过改变配体浓度，观察到最佳浓度3.5×10-2M H2PrEtP产生97.61％E，而在存在增效剂的情况下，最佳浓度为4.0×10-2 M，相当于98.53％E观察到主要配体。在2.25×10-2 M HPrP下，增效剂浓度的变化给出了97.85％E的最佳结果。斜率分析用于预测萃取反应的化学计量，并提出了在单配体和混合配体体系中分别为Cu（HPrEtP）o和Cu（HPrEtP.HPrP）o的金属配合物结构。

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