INTERACTION OF PALLADIUM(II) WITH ALKYLENEDIAMINETETRA(METHYLENEPHOSPHONIC) ACIDS.
The interaction of K2PdCl4 with ethylenediaminetetra(methylenephosphonic) (edtmp, H8L1) and pentamethylenediaminetetra(methylenephosphonic) (pendtmp, H8L2) acids in solutions with physiological chloride ion concentration (0.15 mol L-1KCl) was studied by pH-potentiometry, UV-Vis and NMR spectroscopy...
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| Date: | 2024 |
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| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
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V.I.Vernadsky Institute of General and Inorganic Chemistry
2024
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| Online Access: | https://ucj.org.ua/index.php/journal/article/view/667 |
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| Journal Title: | Ukrainian Chemistry Journal |
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Ukrainian Chemistry Journal| _version_ | 1856543833005752320 |
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| author | Kozachkova, Oleksandra Tsaryk, Nataliya Pekhnyo, Vasyl Trachevskij, Volodymyr Kocharovska, Olga Palchyk, Oleksii |
| author_facet | Kozachkova, Oleksandra Tsaryk, Nataliya Pekhnyo, Vasyl Trachevskij, Volodymyr Kocharovska, Olga Palchyk, Oleksii |
| author_sort | Kozachkova, Oleksandra |
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| collection | OJS |
| datestamp_date | 2025-01-28T08:27:02Z |
| description | The interaction of K2PdCl4 with ethylenediaminetetra(methylenephosphonic) (edtmp, H8L1) and pentamethylenediaminetetra(methylenephosphonic) (pendtmp, H8L2) acids in solutions with physiological chloride ion concentration (0.15 mol L-1KCl) was studied by pH-potentiometry, UV-Vis and NMR spectroscopy. It was established that in the Pd(II)-edtmp and Pd(II)-pendtmp systems at a metal-ligand ratio of 1:1, complexes of equimolar composition [Pd(H4L1,2)Cl2]4-, [Pd(H3L1,2)Cl]4-, [Pd(H2L1,2)Cl]5-, [Pd(HL1,2)Cl]6-, and [Pd(L1,2)Cl]7- are formed, for which formation constants were calculated, and distribution diagrams of equilibrium concentrations were constructed as a function of solution pH. A bidentate mode of coordination of edtmp and pendtmp to the central metal ion by the nitrogen and oxygen atoms of the phosphonate group in the [Pd(H4L1,2)Cl2]4- complex and a tridentate mode by a nitrogen atom and two oxygen atoms of two phosphonate groups of one aminodi(methylphosphonate) moiety of ligands in complexes of the compositions [Pd(H3L1,2)Cl]4-, [Pd(H2L1,2)Cl]5-,[Pd(HL1,2)Cl]6-, and [Pd(L1,2)Cl]7- were determined. At the concentration ratio Pd(II)-edtmp=2:1 at pH>3, sparingly soluble hydrolysis products were formed in solutions, indicating the absence of interaction between the non-coordinated aminodi(methylphosphonate) moiety of the ligand and Pd(II) to form a binuclear complex. In contrast to edtmp, the system K2[PdCl4]-pendtmp at a 2:1 ratio exhibited the formation of binuclear complexes [Pd2(H3L2)Cl4]5-, [Pd2(H2L2)Cl2]4-, [Pd2(HL2)Cl2]5-, and [Pd2(L2)Cl2]6-. In the [Pd2(H3L2)Cl4]5- complex, two aminodi(methylphosphonate) moieties of pendtmp are coordinated to two Pd(II) ions in a bidentate mode by nitrogen and oxygen atoms of the phosphonate group, and in the complexes [Pd2(H2L2)Cl2]4-, [Pd2(HL2)Cl2]5-, and [Pd2(L2)Cl2]6-, they are coordinated in a tridentate mode by a nitrogen atom and two oxygen atoms of two phosphonate groups. |
| first_indexed | 2025-09-24T17:43:57Z |
| format | Article |
| id | oai:ojs2.1444248.nisspano.web.hosting-test.net:article-667 |
| institution | Ukrainian Chemistry Journal |
| language | English |
| last_indexed | 2025-09-24T17:43:57Z |
| publishDate | 2024 |
| publisher | V.I.Vernadsky Institute of General and Inorganic Chemistry |
| record_format | ojs |
| spelling | oai:ojs2.1444248.nisspano.web.hosting-test.net:article-6672025-01-28T08:27:02Z INTERACTION OF PALLADIUM(II) WITH ALKYLENEDIAMINETETRA(METHYLENEPHOSPHONIC) ACIDS. Kozachkova, Oleksandra Tsaryk, Nataliya Pekhnyo, Vasyl Trachevskij, Volodymyr Kocharovska, Olga Palchyk, Oleksii aminopolyphosphonates, palladium complexes, formation constants. The interaction of K2PdCl4 with ethylenediaminetetra(methylenephosphonic) (edtmp, H8L1) and pentamethylenediaminetetra(methylenephosphonic) (pendtmp, H8L2) acids in solutions with physiological chloride ion concentration (0.15 mol L-1KCl) was studied by pH-potentiometry, UV-Vis and NMR spectroscopy. It was established that in the Pd(II)-edtmp and Pd(II)-pendtmp systems at a metal-ligand ratio of 1:1, complexes of equimolar composition [Pd(H4L1,2)Cl2]4-, [Pd(H3L1,2)Cl]4-, [Pd(H2L1,2)Cl]5-, [Pd(HL1,2)Cl]6-, and [Pd(L1,2)Cl]7- are formed, for which formation constants were calculated, and distribution diagrams of equilibrium concentrations were constructed as a function of solution pH. A bidentate mode of coordination of edtmp and pendtmp to the central metal ion by the nitrogen and oxygen atoms of the phosphonate group in the [Pd(H4L1,2)Cl2]4- complex and a tridentate mode by a nitrogen atom and two oxygen atoms of two phosphonate groups of one aminodi(methylphosphonate) moiety of ligands in complexes of the compositions [Pd(H3L1,2)Cl]4-, [Pd(H2L1,2)Cl]5-,[Pd(HL1,2)Cl]6-, and [Pd(L1,2)Cl]7- were determined. At the concentration ratio Pd(II)-edtmp=2:1 at pH>3, sparingly soluble hydrolysis products were formed in solutions, indicating the absence of interaction between the non-coordinated aminodi(methylphosphonate) moiety of the ligand and Pd(II) to form a binuclear complex. In contrast to edtmp, the system K2[PdCl4]-pendtmp at a 2:1 ratio exhibited the formation of binuclear complexes [Pd2(H3L2)Cl4]5-, [Pd2(H2L2)Cl2]4-, [Pd2(HL2)Cl2]5-, and [Pd2(L2)Cl2]6-. In the [Pd2(H3L2)Cl4]5- complex, two aminodi(methylphosphonate) moieties of pendtmp are coordinated to two Pd(II) ions in a bidentate mode by nitrogen and oxygen atoms of the phosphonate group, and in the complexes [Pd2(H2L2)Cl2]4-, [Pd2(HL2)Cl2]5-, and [Pd2(L2)Cl2]6-, they are coordinated in a tridentate mode by a nitrogen atom and two oxygen atoms of two phosphonate groups. V.I.Vernadsky Institute of General and Inorganic Chemistry 2024-07-26 Article Article Inorganic Chemistry Неорганическая химия Неорганічна хімія application/pdf https://ucj.org.ua/index.php/journal/article/view/667 10.33609/2708-129X.90.6.2024.47-58 Ukrainian Chemistry Journal; Vol. 90 No. 6 (2024): Ukrainian Chemistry Journal; 47-58 Украинский химический журнал; Том 90 № 6 (2024): Ukrainian Chemistry Journal; 47-58 Український хімічний журнал; Том 90 № 6 (2024): Ukrainian Chemistry Journal; 47-58 2708-129X 2708-1281 en https://ucj.org.ua/index.php/journal/article/view/667/332 |
| spellingShingle | Kozachkova, Oleksandra Tsaryk, Nataliya Pekhnyo, Vasyl Trachevskij, Volodymyr Kocharovska, Olga Palchyk, Oleksii INTERACTION OF PALLADIUM(II) WITH ALKYLENEDIAMINETETRA(METHYLENEPHOSPHONIC) ACIDS. |
| title | INTERACTION OF PALLADIUM(II) WITH ALKYLENEDIAMINETETRA(METHYLENEPHOSPHONIC) ACIDS. |
| title_full | INTERACTION OF PALLADIUM(II) WITH ALKYLENEDIAMINETETRA(METHYLENEPHOSPHONIC) ACIDS. |
| title_fullStr | INTERACTION OF PALLADIUM(II) WITH ALKYLENEDIAMINETETRA(METHYLENEPHOSPHONIC) ACIDS. |
| title_full_unstemmed | INTERACTION OF PALLADIUM(II) WITH ALKYLENEDIAMINETETRA(METHYLENEPHOSPHONIC) ACIDS. |
| title_short | INTERACTION OF PALLADIUM(II) WITH ALKYLENEDIAMINETETRA(METHYLENEPHOSPHONIC) ACIDS. |
| title_sort | interaction of palladium(ii) with alkylenediaminetetra(methylenephosphonic) acids. |
| topic_facet | aminopolyphosphonates palladium complexes formation constants. |
| url | https://ucj.org.ua/index.php/journal/article/view/667 |
| work_keys_str_mv | AT kozachkovaoleksandra interactionofpalladiumiiwithalkylenediaminetetramethylenephosphonicacids AT tsaryknataliya interactionofpalladiumiiwithalkylenediaminetetramethylenephosphonicacids AT pekhnyovasyl interactionofpalladiumiiwithalkylenediaminetetramethylenephosphonicacids AT trachevskijvolodymyr interactionofpalladiumiiwithalkylenediaminetetramethylenephosphonicacids AT kocharovskaolga interactionofpalladiumiiwithalkylenediaminetetramethylenephosphonicacids AT palchykoleksii interactionofpalladiumiiwithalkylenediaminetetramethylenephosphonicacids |