KFU. Card publication. Complexation in the system zinc(II)-chrome(III)-nickel(II)-glycine-water

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FEDERAL UNIVERSITY

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COMPLEXATION IN THE SYSTEM ZINC(II)-CHROME(III)-NICKEL(II)-GLYCINE-WATER

Form of presentation

Articles in Russian journals and collections

Year of publication

2021

Язык

русский

Authors, employees of KFU

Ivanova Valentina Yurevna, author

Bibliographic description in the original language

Berezin N.B. Complexation in the system zinc(II)-chrome(III)-nickel(II)-glycine-water // N.B. Berezin, V.V. Shevela, Zh.V. Mezhevich, V.Yu. Ivanova / ChemChemTech[Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. - 2021. -V. 64, N11. - P. 44-49

Annotation

The relevance of studying complexation in the system under consideration is associated with the development of the role of heteronuclearcompounds in the processes of electrochemical production of alloys. According to the known concepts, in heteronuclear compounds, the more electronegative atom makes a greater contribution to the bonding orbital, and the orbital of the less electronegative atom, to the antibonding one. This contributes to the convergence of the reduction potentials of metal ions present in such a compound and the production of an electrochemical alloy. In addition, it is known that an increase in the effective radius of complex ions, which is charac-teristic of heteronuclear compounds, decreases the activation energy of their electrochemical re-duction.The aim of this work is to obtain data on complexation in the system Zn (II)–Cr (III)–Ni (II)–glycine–water, composition and stability of heteronuclear compounds. The establishment of the composition of the complexes formed in the system under study was preceded by the acquisition of data on the complexation of each of the indicated elements in individual solutions. It was previ-ously established that in the Zn(II)–Cr (III)–glycine–water system in the pH range 1.0–3.5, hetero-nuclear forms [CrZn(HGly)4Gly4]+and [CrZn(HGly)2Gly6]-prevail, at pH 2.2 -4.0, the share of [CrZnGly8]3-accumulation increases. To establish the composition of the resulting complexes, we used pH metric titration and the method of nuclear magnetic relaxation (NMR) of protons in com-bination with mathematical processing of the results (CPESSP program).The formation of hetero-nuclear complexes [CrNiZn(HGly)4Gly4]3+, [CrNiZn(HGly)2Gly6]+was established, their formation constants and the fraction of accumulation (HGly -glycine) were calculated. The results of the work were used in the development of electrolytes for the process of electrochemical alloying of zinc coatings simultaneously with chromium and nickel.

Keywords

complex heteronuclear compounds, zinc (II), chromium (III), nickel (II), glycine, pH-met-ric titration, protons nuclear magnetic relaxation, CPESSP program

The name of the journal

IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA I KHIMICHESKAYA TEKHNOLOGIYA

URL

https://www.webofscience.com/wos/woscc/full-record/WOS:000708063800004

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=257857&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Ivanova Valentina Yurevna	ru_RU
dc.date.accessioned	2021-01-01T00:00:00Z	ru_RU
dc.date.available	2021-01-01T00:00:00Z	ru_RU
dc.date.issued	2021	ru_RU
dc.identifier.citation	Berezin N.B. Complexation in the system zinc(II)-chrome(III)-nickel(II)-glycine-water // N.B. Berezin, V.V. Сhevela, Zh.V. Mezhevich, V.Yu. Ivanova / ChemChemTech[Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. - 2021. -V. 64, N11. - P. 44-49	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=257857&p_lang=2	ru_RU
dc.description.abstract	IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA I KHIMICHESKAYA TEKHNOLOGIYA	ru_RU
dc.description.abstract	The relevance of studying complexation in the system under consideration is associated with the development of the role of heteronuclearcompounds in the processes of electrochemical production of alloys. According to the known concepts, in heteronuclear compounds, the more electronegative atom makes a greater contribution to the bonding orbital, and the orbital of the less electronegative atom, to the antibonding one. This contributes to the convergence of the reduction potentials of metal ions present in such a compound and the production of an electrochemical alloy. In addition, it is known that an increase in the effective radius of complex ions, which is charac-teristic of heteronuclear compounds, decreases the activation energy of their electrochemical re-duction.The aim of this work is to obtain data on complexation in the system Zn (II)–Cr (III)–Ni (II)–glycine–water, composition and stability of heteronuclear compounds. The establishment of the composition of the complexes formed in the system under study was preceded by the acquisition of data on the complexation of each of the indicated elements in individual solutions. It was previ-ously established that in the Zn(II)–Cr (III)–glycine–water system in the pH range 1.0–3.5, hetero-nuclear forms [CrZn(HGly)4Gly4]+and [CrZn(HGly)2Gly6]-prevail, at pH 2.2 -4.0, the share of [CrZnGly8]3-accumulation increases. To establish the composition of the resulting complexes, we used pH metric titration and the method of nuclear magnetic relaxation (NMR) of protons in com-bination with mathematical processing of the results (CPESSP program).The formation of hetero-nuclear complexes [CrNiZn(HGly)4Gly4]3+, [CrNiZn(HGly)2Gly6]+was established, their formation constants and the fraction of accumulation (HGly -glycine) were calculated. The results of the work were used in the development of electrolytes for the process of electrochemical alloying of zinc coatings simultaneously with chromium and nickel.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	complex heteronuclear compounds	ru_RU
dc.subject	zinc (II)	ru_RU
dc.subject	chromium (III)	ru_RU
dc.subject	nickel (II)	ru_RU
dc.subject	glycine	ru_RU
dc.subject	pH-met-ric titration	ru_RU
dc.subject	protons nuclear magnetic relaxation	ru_RU
dc.subject	CPESSP program	ru_RU
dc.title	Complexation in the system zinc(II)-chrome(III)-nickel(II)-glycine-water	ru_RU
dc.type	Articles in Russian journals and collections	ru_RU