SPECTROSCOPIC STUDIES OF Cu (II) AND Co (II) COMPLEXES WITH RUTIN IN SOLUTIONS
Complexation in M (II) – Rut systems (M(II) = Co, Cu) was studied by electron absorption spectroscopy and pH-metric titration in water-ethanol solutions depending on the metal: ligand ratio (1: 1; 2: 1) and the pH of the medium. It was shown that the structure and stoichiometric composition of the c...
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| Datum: | 2021 |
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2021
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oai:ojs2.1444248.nisspano.web.hosting-test.net:article-3712021-12-17T12:33:11Z SPECTROSCOPIC STUDIES OF Cu (II) AND Co (II) COMPLEXES WITH RUTIN IN SOLUTIONS Trunova , Elena Artamonov, Michailo Makotryk , Tamara complexes, copper, cobalt, rutin, flavonoids, absorption spectra. Complexation in M (II) – Rut systems (M(II) = Co, Cu) was studied by electron absorption spectroscopy and pH-metric titration in water-ethanol solutions depending on the metal: ligand ratio (1: 1; 2: 1) and the pH of the medium. It was shown that the structure and stoichiometric composition of the complexation reaction products are influenced by such basic parameters as L:M and the pH value of the medium. Depending on the pH value, chelation involves certain binding sites, which primarily is associated with the redistribution of the electron density in the flavonoid molecule. In a weakly acidic or neutral medium, regardless of the M(II): Rut ratio, the formation of monoligand complexes of rutin with 3-d metals occurs with the participation of 5-OH and 4-C=O fragments of the A and C rings, and in an alkaline medium, chelation proceeds on the catecholic fragment of ring B rutin. Biligand complexes are formed with the participation of the gydroxo groups of the catechol fragment of each rutin molecule, and the formation of compounds with a ratio of 2:1 occurs both due to 5-OH and 4C=O and due to 3 ', 4'-OH groups. The calculated values of the stability constants of the complexes showed that the stability of the Co (II) complexes is several orders of magnitude lower than the stability of the corresponding Cu (II) complexes. V.I.Vernadsky Institute of General and Inorganic Chemistry 2021-11-26 Article Article Inorganic Chemistry Неорганическая химия Неорганічна хімія application/pdf https://ucj.org.ua/index.php/journal/article/view/371 10.33609/2708-129X.87.10.2021.90-102 Ukrainian Chemistry Journal; Vol 87 No 10 (2021): Ukrainian Chemistry Journal; 90-102 Украинский химический журнал; Том 87 № 10 (2021): Ukrainian Chemistry Journal; 90-102 Український хімічний журнал; Том 87 № 10 (2021): Український хімічний журнал; 90-102 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/371/192 |
| institution |
Ukrainian Chemistry Journal |
| baseUrl_str |
|
| datestamp_date |
2021-12-17T12:33:11Z |
| collection |
OJS |
| language |
English |
| topic_facet |
complexes copper cobalt rutin flavonoids absorption spectra. |
| format |
Article |
| author |
Trunova , Elena Artamonov, Michailo Makotryk , Tamara |
| spellingShingle |
Trunova , Elena Artamonov, Michailo Makotryk , Tamara SPECTROSCOPIC STUDIES OF Cu (II) AND Co (II) COMPLEXES WITH RUTIN IN SOLUTIONS |
| author_facet |
Trunova , Elena Artamonov, Michailo Makotryk , Tamara |
| author_sort |
Trunova , Elena |
| title |
SPECTROSCOPIC STUDIES OF Cu (II) AND Co (II) COMPLEXES WITH RUTIN IN SOLUTIONS |
| title_short |
SPECTROSCOPIC STUDIES OF Cu (II) AND Co (II) COMPLEXES WITH RUTIN IN SOLUTIONS |
| title_full |
SPECTROSCOPIC STUDIES OF Cu (II) AND Co (II) COMPLEXES WITH RUTIN IN SOLUTIONS |
| title_fullStr |
SPECTROSCOPIC STUDIES OF Cu (II) AND Co (II) COMPLEXES WITH RUTIN IN SOLUTIONS |
| title_full_unstemmed |
SPECTROSCOPIC STUDIES OF Cu (II) AND Co (II) COMPLEXES WITH RUTIN IN SOLUTIONS |
| title_sort |
spectroscopic studies of cu (ii) and co (ii) complexes with rutin in solutions |
| description |
Complexation in M (II) – Rut systems (M(II) = Co, Cu) was studied by electron absorption spectroscopy and pH-metric titration in water-ethanol solutions depending on the metal: ligand ratio (1: 1; 2: 1) and the pH of the medium. It was shown that the structure and stoichiometric composition of the complexation reaction products are influenced by such basic parameters as L:M and the pH value of the medium. Depending on the pH value, chelation involves certain binding sites, which primarily is associated with the redistribution of the electron density in the flavonoid molecule. In a weakly acidic or neutral medium, regardless of the M(II): Rut ratio, the formation of monoligand complexes of rutin with 3-d metals occurs with the participation of 5-OH and 4-C=O fragments of the A and C rings, and in an alkaline medium, chelation proceeds on the catecholic fragment of ring B rutin. Biligand complexes are formed with the participation of the gydroxo groups of the catechol fragment of each rutin molecule, and the formation of compounds with a ratio of 2:1 occurs both due to 5-OH and 4C=O and due to 3 ', 4'-OH groups. The calculated values of the stability constants of the complexes showed that the stability of the Co (II) complexes is several orders of magnitude lower than the stability of the corresponding Cu (II) complexes. |
| publisher |
V.I.Vernadsky Institute of General and Inorganic Chemistry |
| publishDate |
2021 |
| url |
https://ucj.org.ua/index.php/journal/article/view/371 |
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2025-09-24T17:43:41Z |
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2025-09-24T17:43:41Z |
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