Kinetics and Mechanism of the Substitution of Ligand (Urea) of [Ti(ur)6]3+ by H2O and SCN¯ in Ethanol Solution
The kinetics of substitution of [Ti(ur)6]3+ by H2O and SCN¯ ion in ethanol solution have been measured spectrophotometrically by stopped-flow method. Water is a good nucleophile toward Ti(III) substrates. Even the solvent ethanol appears to be a poor ligand when compared to water. Substitution, in g...
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| Format: | Article |
| Language: | English |
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Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
1987-06-01
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| Series: | Iranian Journal of Chemistry & Chemical Engineering |
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| Online Access: | http://www.ijcce.ac.ir/article_12271_e97b4991f6834000312f23de43cf1970.pdf |
| _version_ | 1811265805147439104 |
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| author | A. Kamkar J.P. Day |
| author_facet | A. Kamkar J.P. Day |
| author_sort | A. Kamkar |
| collection | DOAJ |
| description | The kinetics of substitution of [Ti(ur)6]3+ by H2O and SCN¯ ion in ethanol solution have been measured spectrophotometrically by stopped-flow method. Water is a good nucleophile toward Ti(III) substrates. Even the solvent ethanol appears to be a poor ligand when compared to water. Substitution, in general follows two parallel pathways: "direct" (second order) reaction and solvolysis followed by rapid substitution (first order). Both mechanisms are important for H2O substitution, but for SCN¯ reaction is much more rapid and proceeds entirely by the "direct" route, probably because of the greater nucleophilic strength of SCN¯ V.S. H2O. |
| first_indexed | 2024-04-12T20:30:35Z |
| format | Article |
| id | doaj.art-58e2e0d5f47f47e2b011437dc16854fd |
| institution | Directory Open Access Journal |
| issn | 1021-9986 1021-9986 |
| language | English |
| last_indexed | 2024-04-12T20:30:35Z |
| publishDate | 1987-06-01 |
| publisher | Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR |
| record_format | Article |
| series | Iranian Journal of Chemistry & Chemical Engineering |
| spelling | doaj.art-58e2e0d5f47f47e2b011437dc16854fd2022-12-22T03:17:46ZengIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry & Chemical Engineering1021-99861021-99861987-06-0161313712271Kinetics and Mechanism of the Substitution of Ligand (Urea) of [Ti(ur)6]3+ by H2O and SCN¯ in Ethanol SolutionA. Kamkar0J.P. Day1Department of Chemistry, Tabriz University, Tabriz, I.R. IRANDepartment of Chemistry, Manchester University, M13 9PL, ENGLANDThe kinetics of substitution of [Ti(ur)6]3+ by H2O and SCN¯ ion in ethanol solution have been measured spectrophotometrically by stopped-flow method. Water is a good nucleophile toward Ti(III) substrates. Even the solvent ethanol appears to be a poor ligand when compared to water. Substitution, in general follows two parallel pathways: "direct" (second order) reaction and solvolysis followed by rapid substitution (first order). Both mechanisms are important for H2O substitution, but for SCN¯ reaction is much more rapid and proceeds entirely by the "direct" route, probably because of the greater nucleophilic strength of SCN¯ V.S. H2O.http://www.ijcce.ac.ir/article_12271_e97b4991f6834000312f23de43cf1970.pdfkineticssubstitutionligand (urea)ethanol solution |
| spellingShingle | A. Kamkar J.P. Day Kinetics and Mechanism of the Substitution of Ligand (Urea) of [Ti(ur)6]3+ by H2O and SCN¯ in Ethanol Solution Iranian Journal of Chemistry & Chemical Engineering kinetics substitution ligand (urea) ethanol solution |
| title | Kinetics and Mechanism of the Substitution of Ligand (Urea) of [Ti(ur)6]3+ by H2O and SCN¯ in Ethanol Solution |
| title_full | Kinetics and Mechanism of the Substitution of Ligand (Urea) of [Ti(ur)6]3+ by H2O and SCN¯ in Ethanol Solution |
| title_fullStr | Kinetics and Mechanism of the Substitution of Ligand (Urea) of [Ti(ur)6]3+ by H2O and SCN¯ in Ethanol Solution |
| title_full_unstemmed | Kinetics and Mechanism of the Substitution of Ligand (Urea) of [Ti(ur)6]3+ by H2O and SCN¯ in Ethanol Solution |
| title_short | Kinetics and Mechanism of the Substitution of Ligand (Urea) of [Ti(ur)6]3+ by H2O and SCN¯ in Ethanol Solution |
| title_sort | kinetics and mechanism of the substitution of ligand urea of ti ur 6 3 by h2o and scn¯ in ethanol solution |
| topic | kinetics substitution ligand (urea) ethanol solution |
| url | http://www.ijcce.ac.ir/article_12271_e97b4991f6834000312f23de43cf1970.pdf |
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