DETERMINATION OF POLYLIGAND COMPLEXES OF COBALT (II) WITH CITRATE AND PYROPHOSPHATE IONS
In the work it is shown by the spectrophotometry method that depending on the concentration ratio of ligands [PPi4–]/[Cit3–] in the pyrophosphate-citrate electrolyte, cobalt (II) ions form not only citrate [Co(Cit)2]4– and pyrophosphate [Co(PPi)2]6–, but also polyligand complexes [Co(PPi)m(Cit)n]+2–...
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| Дата: | 2022 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
V.I.Vernadsky Institute of General and Inorganic Chemistry
2022
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| Онлайн доступ: | https://ucj.org.ua/index.php/journal/article/view/436 |
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| Назва журналу: | Ukrainian Chemistry Journal |
Репозитарії
Ukrainian Chemistry Journal| _version_ | 1856543789676494848 |
|---|---|
| author | Nikitenko, Vasyl Kublanovsky, Valeriy Yapontseva, Yuliya |
| author_facet | Nikitenko, Vasyl Kublanovsky, Valeriy Yapontseva, Yuliya |
| author_sort | Nikitenko, Vasyl |
| baseUrl_str | |
| collection | OJS |
| datestamp_date | 2022-07-06T15:57:59Z |
| description | In the work it is shown by the spectrophotometry method that depending on the concentration ratio of ligands [PPi4–]/[Cit3–] in the pyrophosphate-citrate electrolyte, cobalt (II) ions form not only citrate [Co(Cit)2]4– and pyrophosphate [Co(PPi)2]6–, but also polyligand complexes [Co(PPi)m(Cit)n]+2–(4m+3n). The composition of polyligand complexes [Co(PPi)Cit]5– was determined, and the equilibrium constant of the reaction of their formation and the constant of their stability were calculated (pβ=8.47). The dependence of the degree of formation of citrate, polyligand, and pyrophosphate complexes of cobalt (II) in the pyrophosphate-citrate electrolyte on the logarithm of the ratio of equilibrium concentrations of ligands is calculated. |
| first_indexed | 2025-09-24T17:43:44Z |
| format | Article |
| id | oai:ojs2.1444248.nisspano.web.hosting-test.net:article-436 |
| institution | Ukrainian Chemistry Journal |
| language | English |
| last_indexed | 2025-09-24T17:43:44Z |
| publishDate | 2022 |
| publisher | V.I.Vernadsky Institute of General and Inorganic Chemistry |
| record_format | ojs |
| spelling | oai:ojs2.1444248.nisspano.web.hosting-test.net:article-4362022-07-06T15:57:59Z DETERMINATION OF POLYLIGAND COMPLEXES OF COBALT (II) WITH CITRATE AND PYROPHOSPHATE IONS Nikitenko, Vasyl Kublanovsky, Valeriy Yapontseva, Yuliya cobalt (II), polyligand complex, composition, stability constant, spectrophotometry. In the work it is shown by the spectrophotometry method that depending on the concentration ratio of ligands [PPi4–]/[Cit3–] in the pyrophosphate-citrate electrolyte, cobalt (II) ions form not only citrate [Co(Cit)2]4– and pyrophosphate [Co(PPi)2]6–, but also polyligand complexes [Co(PPi)m(Cit)n]+2–(4m+3n). The composition of polyligand complexes [Co(PPi)Cit]5– was determined, and the equilibrium constant of the reaction of their formation and the constant of their stability were calculated (pβ=8.47). The dependence of the degree of formation of citrate, polyligand, and pyrophosphate complexes of cobalt (II) in the pyrophosphate-citrate electrolyte on the logarithm of the ratio of equilibrium concentrations of ligands is calculated. V.I.Vernadsky Institute of General and Inorganic Chemistry 2022-05-25 Article Article Physical chemistry Физическая xимия Фізична xімія application/pdf https://ucj.org.ua/index.php/journal/article/view/436 10.33609/2708-129X.88.04.2022.113-122 Ukrainian Chemistry Journal; Vol. 88 No. 4 (2022): Ukrainian Chemistry Journal; 113-122 Украинский химический журнал; Том 88 № 4 (2022): Ukrainian Chemistry Journal; 113-122 Український хімічний журнал; Том 88 № 4 (2022): Український хімічний журнал; 113-122 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/436/224 |
| spellingShingle | Nikitenko, Vasyl Kublanovsky, Valeriy Yapontseva, Yuliya DETERMINATION OF POLYLIGAND COMPLEXES OF COBALT (II) WITH CITRATE AND PYROPHOSPHATE IONS |
| title | DETERMINATION OF POLYLIGAND COMPLEXES OF COBALT (II) WITH CITRATE AND PYROPHOSPHATE IONS |
| title_full | DETERMINATION OF POLYLIGAND COMPLEXES OF COBALT (II) WITH CITRATE AND PYROPHOSPHATE IONS |
| title_fullStr | DETERMINATION OF POLYLIGAND COMPLEXES OF COBALT (II) WITH CITRATE AND PYROPHOSPHATE IONS |
| title_full_unstemmed | DETERMINATION OF POLYLIGAND COMPLEXES OF COBALT (II) WITH CITRATE AND PYROPHOSPHATE IONS |
| title_short | DETERMINATION OF POLYLIGAND COMPLEXES OF COBALT (II) WITH CITRATE AND PYROPHOSPHATE IONS |
| title_sort | determination of polyligand complexes of cobalt (ii) with citrate and pyrophosphate ions |
| topic_facet | cobalt (II) polyligand complex composition stability constant spectrophotometry. |
| url | https://ucj.org.ua/index.php/journal/article/view/436 |
| work_keys_str_mv | AT nikitenkovasyl determinationofpolyligandcomplexesofcobaltiiwithcitrateandpyrophosphateions AT kublanovskyvaleriy determinationofpolyligandcomplexesofcobaltiiwithcitrateandpyrophosphateions AT yapontsevayuliya determinationofpolyligandcomplexesofcobaltiiwithcitrateandpyrophosphateions |