Kinetics and Mechanism of Oxidation of Aromatic Aldehydes by Imidazolium Dichromate in Aqueous Acetic Acid Medium
The kinetics of oxidation of benzaldehyde (BA) and para-substituted benzaldehydes by imidazolium dichromate (IDC) has been studied in aqueous acetic acid medium in the presence of perchloric acid. The reaction is first order each in [IDC], [Substrate] and [H+]. The reaction rates have been determine...
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| Format: | Article |
| Language: | English |
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Wiley
2009-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2009/520170 |
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| author | S. Sheik Mansoor S. Syed Shafi |
| author_facet | S. Sheik Mansoor S. Syed Shafi |
| author_sort | S. Sheik Mansoor |
| collection | DOAJ |
| description | The kinetics of oxidation of benzaldehyde (BA) and para-substituted benzaldehydes by imidazolium dichromate (IDC) has been studied in aqueous acetic acid medium in the presence of perchloric acid. The reaction is first order each in [IDC], [Substrate] and [H+]. The reaction rates have been determined at different temperatures and the activation parameters calculated. Electron withdrawing substituents are found to increase the reaction and electron releasing substituents are found to retard the rate of the reaction and the rate data obey the Hammett relationship. The products of the oxidation are the corresponding acids. The rate decreases with the increase in the water content of the medium. A suitable mechanism is proposed. |
| format | Article |
| id | doaj-art-08d1d07117054540979b3132cb670bc5 |
| institution | Kabale University |
| issn | 0973-4945 2090-9810 |
| language | English |
| publishDate | 2009-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | E-Journal of Chemistry |
| spelling | doaj-art-08d1d07117054540979b3132cb670bc52025-02-03T05:50:18ZengWileyE-Journal of Chemistry0973-49452090-98102009-01-016S152252810.1155/2009/520170Kinetics and Mechanism of Oxidation of Aromatic Aldehydes by Imidazolium Dichromate in Aqueous Acetic Acid MediumS. Sheik Mansoor0S. Syed Shafi1Department of Chemistry, C.Abdul Hakeem College, Melvisharam–632 509, IndiaDepartment of Chemistry, Islamiah College, Vaniyambadi–635 752, IndiaThe kinetics of oxidation of benzaldehyde (BA) and para-substituted benzaldehydes by imidazolium dichromate (IDC) has been studied in aqueous acetic acid medium in the presence of perchloric acid. The reaction is first order each in [IDC], [Substrate] and [H+]. The reaction rates have been determined at different temperatures and the activation parameters calculated. Electron withdrawing substituents are found to increase the reaction and electron releasing substituents are found to retard the rate of the reaction and the rate data obey the Hammett relationship. The products of the oxidation are the corresponding acids. The rate decreases with the increase in the water content of the medium. A suitable mechanism is proposed.http://dx.doi.org/10.1155/2009/520170 |
| spellingShingle | S. Sheik Mansoor S. Syed Shafi Kinetics and Mechanism of Oxidation of Aromatic Aldehydes by Imidazolium Dichromate in Aqueous Acetic Acid Medium E-Journal of Chemistry |
| title | Kinetics and Mechanism of Oxidation of Aromatic Aldehydes by Imidazolium Dichromate in Aqueous Acetic Acid Medium |
| title_full | Kinetics and Mechanism of Oxidation of Aromatic Aldehydes by Imidazolium Dichromate in Aqueous Acetic Acid Medium |
| title_fullStr | Kinetics and Mechanism of Oxidation of Aromatic Aldehydes by Imidazolium Dichromate in Aqueous Acetic Acid Medium |
| title_full_unstemmed | Kinetics and Mechanism of Oxidation of Aromatic Aldehydes by Imidazolium Dichromate in Aqueous Acetic Acid Medium |
| title_short | Kinetics and Mechanism of Oxidation of Aromatic Aldehydes by Imidazolium Dichromate in Aqueous Acetic Acid Medium |
| title_sort | kinetics and mechanism of oxidation of aromatic aldehydes by imidazolium dichromate in aqueous acetic acid medium |
| url | http://dx.doi.org/10.1155/2009/520170 |
| work_keys_str_mv | AT ssheikmansoor kineticsandmechanismofoxidationofaromaticaldehydesbyimidazoliumdichromateinaqueousaceticacidmedium AT ssyedshafi kineticsandmechanismofoxidationofaromaticaldehydesbyimidazoliumdichromateinaqueousaceticacidmedium |