STABILITY OF COORDINATION COMPOUNDS OF SOME d-METAL IONS WITH SUCCINIC ACID ANION IN AQUEOUS-ETHANOL SOLVENTS

IF 0.6 Q4 CHEMISTRY, MULTIDISCIPLINARY

Izvestiya Vysshikh Uchebnykh Zavedenii Khimiya i Khimicheskaya Tekhnologiya Pub Date : 2018-10-22 DOI:10.6060/ivkkt20186109-10.5778

N. V. Tukumova, T. R. Usacheva, Tran Thi Dieu Thuan, V. Sharnin, C. Giancola

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引用次数: 1

Abstract

The paper provides an overview of own data on complexation of nickel (II), cobalt (II) and cooper (II) ions with succinic acid anion in water-organic mixed solvents. Proper data are compared with data reported in literature for d-metal complexes with anions of maleic and succinic acids. The effect of aqueous ethanol solvent compositions on the stability of coordination compounds of M2+ with succinic acid anion as well as on рК values of stepwise succinic acid dissociation was carried out by a potentiometric titration at ionic strength of 0.1 maintained with sodium perchlorate at 298.15 ± 0.10 K. Mono ligand complexes of Ni2+, Co2+ and Cu2+ ions with succinic acid anion become stronger when ethanol content rises. In aqueous solutions Cu2+ ion forms stronger complexes with succinic and maleic acid anions than Ni2+ and Co2+ ions. In the studied water - ethanol solution this ratio is maintained for complexes with succinic acid anion, but a water-isopropanol solvent exerts leveling effect on the stability of complexes of nickel (II) and cobalt (II). An increase in the stability of complexes of d-metal with anions of maleic and succinic acids is due to the destabilization of the ligand with increasing ethanol concentration. The principal contribution of the changes in the solvation state of ligand is a typical for the stability changes of d-metal complexes with amine, glycinate, and acetate type ligands in water-organic mixed solvents. For citation: Tukumova N.V., Usacheva T.R., Thuan Tran Thi Dieu, Sharnin V.A., Giancola C. Stability of coordination compounds of some d-metal ions with succinic acid anion in aqueous-ethanol solvents. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 9-10. P. 15-22

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一些d-金属离子与琥珀酸阴离子配位化合物在水-乙醇溶剂中的稳定性

本文综述了在水-有机混合溶剂中镍(II)、钴(II)和铜(II)离子与琥珀酸阴离子的络合作用。将适当的数据与文献中报道的d-金属配合物与马来酸和琥珀酸阴离子的数据进行了比较。采用高氯酸钠在298.15±0.10 K下离子强度为0.1的电位滴定法，研究了乙醇水溶液组分对M2+与琥珀酸阴离子配合物稳定性和琥珀酸逐步解离рК值的影响。随着乙醇含量的增加，Ni2+、Co2+和Cu2+离子与琥珀酸阴离子的单配体配合物变得更强。在水溶液中，Cu2+离子与琥珀酸和马来酸阴离子形成比Ni2+和Co2+离子更强的配合物。在研究的水-乙醇溶液中，与琥珀酸阴离子的配合物保持这一比例，但水-异丙醇溶剂对镍(II)和钴(II)配合物的稳定性起平衡作用。d-金属与马来酸和琥珀酸阴离子配合物的稳定性增加是由于配体随着乙醇浓度的增加而不稳定。配体溶剂化状态变化的主要贡献是典型的d-金属配合物与胺、甘氨酸和乙酸型配体在水-有机混合溶剂中的稳定性变化。引用本文:图库蒙瓦，乌舍切瓦，陈建军，陈建军，陈建军。d-金属离子与琥珀酸阴离子配合物在水-乙醇溶剂中的稳定性研究。Izv。Vyssh。Uchebn。Zaved。Khim。Khim。Tekhnol》2018。v . 61。N 9。第15 - 22页

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来源期刊

Izvestiya Vysshikh Uchebnykh Zavedenii Khimiya i Khimicheskaya Tekhnologiya CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.40

自引率

44.40%

发文量