1
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Vibrational spectra and molecular structure of sulfanilic acid: IR and low temperature Raman studies and DFT investigation of monomeric and dimeric forms. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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2
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Hassan RM, Ibrahim SM. Synthesis of keto-biomacromolecule derivatives by oxidation of carboxymethyl cellulose using alkaline hexacyanoferrate (III) for alternative applications in biotechnology. Int J Biol Macromol 2022; 221:1202-1208. [PMID: 36108748 DOI: 10.1016/j.ijbiomac.2022.09.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 09/04/2022] [Accepted: 09/07/2022] [Indexed: 11/16/2022]
Abstract
The oxidation kinetics of polysaccharides involving carboxymethyl cellulose (CMC) by several oxidizing agent have been investigated in more detail with shedding some light on the synthesis of their respective keto-derivatives as oxidation precursor products. However, the literature survey indicated that no reports have appeared on the oxidation kinetics of CMC or the synthesis of keto-CMC using hexacyanoferrate (III) ion. Therefore, a lack of information on the transfer of electron process in the rate-determining stage as well as the nature of such keto-derivatives obtained as a result of polysaccharides oxidation using various oxidants in aqueous solutions. Accordingly, the present study presents synthesis of diketo CMC as a biomacromolecule derivative using potassium ferricyanide in alkaline media. The experimental results revealed the formation of either monoketo or diketo-derivatives of CMC based on initial molar ratio between the two reactants. The formation of such keto derivatives was confirmed by the reaction of the oxidation products with both 2,4-dinitrophenyl hydrazine and hydroxyl amine as well as FTIR spectra. The reaction kinetics of oxidation showed unity order in [Fe(CN)63-] and fractional first-orders with respect to both [CMC] and [OH-].The obedience of the reaction behavior to the Michael-Menten kinetics was indicative to the formation of 1:1 intermediate complex prior to the rate-determining step as a pathway route for oxidation.
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Affiliation(s)
- Refat M Hassan
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt.
| | - Samia M Ibrahim
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga 72511, New Valley, Egypt
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3
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Hassan RM, Ibrahim SM. Mechanistic Approach to the Oxidation of Poly(ethylene glycol) by Potassium Ferricyanide in Basic Media with the Orientation on the Type of Transfer of Electrons in the Absence and Presence of a Ru(III) Catalyst. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Refat M. Hassan
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Samia M. Ibrahim
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga 72511, New Valley, Egypt
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4
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Hegde RN, Vishwanatha P, Nandibewoor ST. Kinetic and Mechanistic Modeling on Oxidation of Antidiabetic Drug Metformin with Cu(III) Periodate Complex in Aqueous Alkaline Media. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422010137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Ruthenium (III) catalysed and uncatalysed oxidation of torsemide by hexacyanoferrate (III) in aqueous alkaline medium: A kinetic comparative approach. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Thriveni MK, Mallikarjuna I, Bellappa S, Shivalingaswamy T. Oxidation of Caffeine by Diperiodatocuprate(III) with and without Ruthenium(III) in Alkaline Medium. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421140235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Patil SM, Bagoji AM, Konnur SB, Nandibewoor ST. Autocatalyzed oxidation of
d
‐glucitol by alkaline copper (III) periodate complex: A kinetic and mechanistic approach. J PHYS ORG CHEM 2020. [DOI: 10.1002/poc.4146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - Santosh B. Konnur
- Department of Studies in Chemistry Karnatak University Dharwad India
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8
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Fawzy A, Abdallah M, Alqarni N. Degradation of Ampicillin and Flucloxacillin Antibiotics via Oxidation by Alkaline Hexacyanoferrate(III): Kinetics and Mechanistic Aspects. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03956] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ahmed Fawzy
- Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Metwally Abdallah
- Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
- Chemistry Department, Faculty of Science, Benha University, Benha 13511, Egypt
| | - Nada Alqarni
- Chemistry Department, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
- Chemistry Department, Faculty of Science, Bisha University, Bisha 61922, Saudi Arabia
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Sharma P, Sailani R, Meena A, Khandelwal CL. A kinetic and mechanistic study of the osmium(VIII)-catalysed oxidation of crotyl alcohol by hexacyanoferrate(III) in aqueous Alkaline medium. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519819900622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The kinetics and mechanism of the osmium(VIII)-catalysed oxidation of crotyl alcohol by hexacyanoferrate(III) in aqueous alkaline medium is studied. The role of the osmium(VIII) catalyst is delineated to account for the experimental observations. A plausible reaction mechanism is suggested. Activation parameters such as the energy and entropy of activation are evaluated by employing the Eyring equation and are found to be 36.833 kJ mol−1 and −141.518 J K−1 mol−1, respectively.
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Affiliation(s)
| | - Riya Sailani
- Department of Chemistry, University of Rajasthan, Jaipur, India
| | - Anita Meena
- Department of Chemistry, JNV University, Jodhpur, India
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10
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Meti MD, Nandibewoor ST, Chimatadar SA. Oxidation of procainamide by diperiodatocuprate(III) complex in aqueous alkaline medium: a comparative kinetic study. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2019.1662041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Manjunath D. Meti
- Department of Chemistry, Indian Institute of Technology, Bombay 400076, India
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11
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Autocatalyzed oxidation of amino acid, L-Citrulline by diperiodatocuprate(III) complex in aqueous alkaline medium: a kinetics and mechanistic approach. J CHEM SCI 2019. [DOI: 10.1007/s12039-019-1718-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Konnur SB, Nandibewoor ST. Kinetic Investigations of Ruthenium(III) Catalyzed Oxidation of Dimedone by Diperiodatocuprate(III) in Aqueous Alkaline Media. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s003602441909022x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Investigation of kinetics and mechanism of oxidation of acetoacetanilide in alkaline medium using hexacyanoferrate(III). MONATSHEFTE FUR CHEMIE 2019. [DOI: 10.1007/s00706-019-02482-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Kinetic study of uncatalyzed and Cu(II) catalyzed oxidation of ofloxacin in aqueous alkaline medium and their mechanistic aspects. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0764-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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15
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Song D, Jefferson WA, Cheng H, Jiang X, Qiang Z, He H, Liu H, Qu J. Acidic permanganate oxidation of sulfamethoxazole by stepwise electron-proton transfer. CHEMOSPHERE 2019; 222:71-82. [PMID: 30690403 DOI: 10.1016/j.chemosphere.2019.01.113] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 12/13/2018] [Accepted: 01/21/2019] [Indexed: 06/09/2023]
Abstract
Permanganate is a versatile chemical oxidant, and has undergone a dramatic evolution toward deep insight into its reaction mechanism. However, the hydrogen abstraction of the NH bond by permanganate remains unclear. We studied the permanganate oxidation of the emerging micropollutant sulfamethoxazole in acidic aqueous solution. The reaction followed autocatalytic kinetics and demonstrated first-order with respect to each reactant. The presence of HMnO4 accelerated the reaction rate, which was four orders of magnitude higher than that of MnO4-. Based on the identified products, the rate-limiting step was determined to be simple NH bond oxidation by metal-oxo species permanganate. The mechanism was then studied computationally by density functional theory (DFT) using ammonia as the simplest model. Results showed that the NH bond oxidation by MnO4- (32.86 kcal/mol) was a concerted mechanism similar to that of CH bond oxidation, whereas HMnO4 oxidation of the NH bond (10.44 kcal/mol) was a stepwise electron-proton transfer. This reminds us that coordination of Brønsted acid could not only produce the stronger electrophile but also change the reaction mode by avoiding the bond cleavage in electron transfer process.
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Affiliation(s)
- Dean Song
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; State Agriculture Ministry Laboratory of Quality & Safety Risk Assessment for Tobacco, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - William A Jefferson
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Hanyang Cheng
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xiaohua Jiang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Zhimin Qiang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Hong He
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Huijuan Liu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Jiuhui Qu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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16
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Madhu Gupta, Srivastava A, Srivastava S. Comparative Study of Kinetic and Mechanistic Study of Oxidation of L-Alanine and L-Proline by Sodium Periodate Catalyzed by Osmium(VIII) in Micromolar Concentrations. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s0036024419010096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Asghar BH, Altass HM, Fawzy A. Copper(II) catalysis for oxidation of l -tryptophan by hexacyanoferrate(III) in alkaline medium: A kinetic and mechanistic approach. JOURNAL OF SAUDI CHEMICAL SOCIETY 2017. [DOI: 10.1016/j.jscs.2015.12.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Kinetics and mechanism of oxidation of chondroitin-4-sulfate polysaccharide as a sulfated polysaccharide by hexacyanoferrate(III) in alkaline solutions with synthesis of novel coordination biopolymer chelating agent. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Tazwar G, Jain A, Mittal N, Devra V. Oxidation of Ciprofloxacin by Hexacyanoferrate(III) in the Presence of Cu(II) as a Catalyst: A Kinetic Study. INT J CHEM KINET 2017. [DOI: 10.1002/kin.21097] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gajala Tazwar
- Department of Chemistry; J. D. B. Govt. Girls P. G. College; Kota 324 001 India
| | - Ankita Jain
- Department of Chemistry; J. D. B. Govt. Girls P. G. College; Kota 324 001 India
| | - Naveen Mittal
- Department of Chemistry; J. D. B. Govt. Girls P. G. College; Kota 324 001 India
| | - Vijay Devra
- Department of Chemistry; J. D. B. Govt. Girls P. G. College; Kota 324 001 India
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20
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Bagoji AM, Magdum PA, Nandibewoor ST. Oxidation of Acebutolol by Copper(III) Periodate Complex in Aqueous Alkaline Medium: A Kinetic and Mechanistic Approach. J SOLUTION CHEM 2016. [DOI: 10.1007/s10953-016-0539-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Grandner JM, Cacho RA, Tang Y, Houk KN. Mechanism of the P450-Catalyzed Oxidative Cyclization in the Biosynthesis of Griseofulvin. ACS Catal 2016; 6:4506-4511. [PMID: 28503354 DOI: 10.1021/acscatal.6b01068] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Griseofulvin is an anti-fungal agent which has recently been determined to have potential anti-viral and anti-cancer applications. The role of specific enzymes involved in the biosynthesis of this natural product has previously been determined, but the mechanism by which a p450, GsfF, catalyzes the key oxidative cyclization of griseophenone B remains unknown. Using density functional theory (DFT), we have determined the mechanism of this oxidation that forms the oxa-spiro core of griseofulvin. Computations show GsfF preferentially performs two sequential phenolic O-H abstractions rather than epoxidation to form an arene oxide intermediate. This conclusion is supported by experimental kinetic isotope effects.
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Affiliation(s)
- Jessica M. Grandner
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Ralph A. Cacho
- Department
of Chemical and Biomolecular Engineering, University of California, Los
Angeles, California 90095, United States
| | - Yi Tang
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Los
Angeles, California 90095, United States
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
- Department
of Chemical and Biomolecular Engineering, University of California, Los
Angeles, California 90095, United States
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22
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Kinetics and mechanism of uncatalyzed and ruthenium(III)-catalyzed oxidation of formamidine derivative by hexacyanoferrate(III) in aqueous alkaline medium. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1067-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Mechanistic aspects of osmium(VIII) catalysed oxidation of l-glutamic acid by copper(III) periodate complex in an aqueous alkaline medium. MONATSHEFTE FUR CHEMIE 2016. [DOI: 10.1007/s00706-016-1672-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Manganese(II) catalyzed periodate oxidation of a ternary dipicolinatochromium(III) complex with iminodiacetate as co-ligand: mechanistic and kinetic study. TRANSIT METAL CHEM 2016. [DOI: 10.1007/s11243-016-0038-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Thermodynamic, kinetic and mechanistic investigations of Piperazine oxidation by Diperiodatocuprate(III) complex in aqueous alkaline medium. J CHEM SCI 2016. [DOI: 10.1007/s12039-016-1044-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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Magdum PA, Bagoji AM, Nandibewoor ST. Ruthenium(III) catalysed and uncatalysed oxidative mechanisms of methylxanthine drug theophylline by copper(III) periodate complex in alkali media: a comparative approach. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3478] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Prashant A. Magdum
- P. G. Department of Studies in Chemistry; Karnatak University; Dharwad 580003 India
| | - Atmanand M. Bagoji
- P. G. Department of Studies in Chemistry; Karnatak University; Dharwad 580003 India
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Patil DG, Magdum PA, Nandibewoor ST. Mechanistic Investigations of Uncatalyzed and Ruthenium(III) Catalyzed Oxidation of Vanillin by Periodate in Aqueous Alkaline Medium. J SOLUTION CHEM 2015. [DOI: 10.1007/s10953-015-0341-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Mechanistic studies of uncatalyzed and ruthenium(III)-catalyzed oxidation of the antibiotic drug chloramphenicol by hexacyanoferrate(III) in aqueous alkaline medium: a comparative kinetic study. MONATSHEFTE FUR CHEMIE 2014; 145:1561-1573. [PMID: 26166888 PMCID: PMC4494844 DOI: 10.1007/s00706-014-1208-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 03/19/2014] [Indexed: 11/02/2022]
Abstract
ABSTRACT The kinetics of oxidation of the antibiotic drug chloramphenicol (CHP) by hexacyanoferrate(III) (HCF) has been investigated spectrophotometrically both in the absence and presence of ruthenium(III) catalyst in aqueous alkaline medium at 25 °C and at constant ionic strength of 1.10 mol dm-3. The stoichiometry is identical in both cases, i.e. [CHP]/[HCF] = 1:2. The oxidation products were identified by TLC and spectral studies such as GC-MS, IR, and 1H NMR. In both catalyzed and uncatalyzed reactions, the order with respect to the concentration of HCF is unity, whereas the order with respect to the concentration of CHP and the concentration of OH- is less than unity over the concentration range studied. The order with respect to the concentration of Ru(III) is unity. The reaction in the presence of Ru(III) is approximately tenfold faster than the uncatalyzed reaction. The active species of oxidant and catalyst are [Fe(CN)6]3- and [Ru(H2O)5(OH)]2+, respectively. On the basis of experimental results suitable mechanisms are proposed. The reaction constants involved in the different steps of the reaction mechanisms were calculated for both cases. The catalytic constant was also calculated for the catalyzed reaction at different temperatures. The activation parameters with respect to the slow step of the mechanism and thermodynamic quantities are also determined. GRAPHICAL ABSTRACT
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Iodide ion mediated oxidation of chloramphenicol by hexacyanoferrate(III) ion in aqueous alkaline medium. REACTION KINETICS MECHANISMS AND CATALYSIS 2013. [DOI: 10.1007/s11144-013-0618-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Naik DV, Byadagi KS, Nandibewoor ST, Chimatadar SA. Kinetics and mechanistic study of manganese(II)-catalyzed cerium(IV) oxidation of thiamine hydrochloride in aqueous perchloric acid medium by stopped flow technique. MONATSHEFTE FUR CHEMIE 2013. [DOI: 10.1007/s00706-013-1005-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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31
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Sataraddi SR, Nandibewoor ST. Oxidation of d-Glucose by Silver(III) Periodate Complex in the Presence of Ru(III)/Os(VIII) as a Homogeneous Catalyst: A Comparative Mechanistic Study (Stopped Flow Technique). J SOLUTION CHEM 2013. [DOI: 10.1007/s10953-013-0002-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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32
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Khan AAP, Asiri AM, Khan A, Azum N, Rub MA, Rahman MM, Khan SB, Siddiqi K, Alamry KA. Mechanistic investigation of the oxidation of Cefuroxime by hexacyanoferrate(III) in alkaline conditions. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2012.09.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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33
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Kinetics and Mechanism of Electron Transfer to Heptavalent Manganese by DL-Aspartic Acid in Alkaline Aqueous and Micellar Media. J CHEM-NY 2013. [DOI: 10.1155/2013/724505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The kinetics and mechanism of the electron transfer ofdl-Aspartic acid (Asp) by Mn (VII) in alkaline medium has been studied spectrophotometrically over the range2.0≤103[Asp]≤5.0 mol dm−3;0.01≤[OH-]≤0.05 mol dm−3;298≤T≤318 K andI=0.05 mol dm−3(KNO3). The reaction exhibits first-order dependence in[MnO4-]Tbut shows fractional-order dependence in both[Asp]Tand[OH−]T. The reaction was studied in the presence of sodium dodecyl sulfate (SDS); an increase in the rate with the increase in the micellar concentration was observed. The products were characterized by spectral analysis. A mechanism involving free radicals is proposed. Asp bindsMnO4-to form a complex that subsequently decomposes to products. Activation parametersΔH° (kJ mol−1) andΔS° (JK−1 mol−1) for the reaction are5.62±0.35and−227.65±1.1, respectively. The negative value ofΔS° indicates that oxidation occurs via inner sphere mechanism.
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Gowda JI, Nandibewoor ST. Mechanism of Oxidation of Xylitol by a New Oxidant, Diperiodatoargentate (III), in Aqueous Alkaline Medium. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/15533174.2012.684261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Jayant I. Gowda
- a P. G. Department of Studies in Chemistry , Karnatak University , Dharwad , India
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35
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Kinetics and mechanism of oxidation of L-leucine by alkaline diperiodatocuprate(III) — A free radical intervention, deamination and decarboxylation. J CHEM SCI 2012. [DOI: 10.1007/s12039-012-0283-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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36
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MALODE SHWETAJ, SHETTI NAGARAJP, NANDIBEWOOR SHARANAPPAT. Mechanistic aspects of Os(VIII) catalysed oxidation of loop diuretic drug furosemide by Ag(III) periodate complex in aqueous alkaline medium. J CHEM SCI 2012. [DOI: 10.1007/s12039-011-0182-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Patil RK, Nandibewoor ST, Chimatadar SA. Spectral and mechanistic investigations of ruthenium(III) catalyzed oxidation of atenolol by diperiodatocuprate(III) in aqueous alkaline medium. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2012. [DOI: 10.1134/s0036024412030247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Hosahalli RV, Byadagi KS, Nandibewoor ST, Chimatadar SA. Kinetics and mechanism of ruthenium(III) catalyzed oxidation of chloromphenicol—An antibiotic drug by diperiodatocuprate(III) in aqueous alkaline medium. KINETICS AND CATALYSIS 2012. [DOI: 10.1134/s0023158411060085] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Gowda JI, Sataraddi SR, Nandibewoor ST. Oxidation of xylitol by a silver(iii) periodate complex in the presence of osmium(viii) as a homogeneous catalyst. Catal Sci Technol 2012. [DOI: 10.1039/c2cy20336g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Oxidation of 6-aminopenicillanic acid by an alkaline copper(III) periodate complex in the absence and presence of ruthenium(III) as a homogeneous catalyst. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.04.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Malode SJ, Abbar JC, Nandibewoor ST. Mechanistic investigations of ruthenium(III) catalyzed oxidation of pentoxifylline by copper(III) periodate complex in aqueous alkaline medium. MONATSHEFTE FUR CHEMIE 2011. [DOI: 10.1007/s00706-011-0458-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Naik KM, Nandibewoor ST. Thermodynamic quantities for different steps involved in the mechanism of the oxidation of 6-mercaptopurine by diperiodatocuprate(III) in aqueous alkaline medium. J Sulphur Chem 2011. [DOI: 10.1080/17415993.2011.554836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abbar JC, Lamani SD, Nandibewoor ST. Ruthenium(III) Catalyzed Oxidative Degradation of Amitriptyline-A Tricyclic Antidepressant Drug by Permanganate in Aqueous Acidic Medium. J SOLUTION CHEM 2011. [DOI: 10.1007/s10953-011-9655-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Naik KM, Nandibewoor ST. Mechanistic aspects of uncatalyzed and ruthenium(iii) catalyzed oxidation of 1,4-dioxane by a copper(iii) periodate complex in aqueous alkaline medium. Catal Sci Technol 2011. [DOI: 10.1039/c1cy00192b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Lamani SD, Tatagar AM, Nandibewoor ST. Mechanistic investigation on the oxidation of kinetin by Ag(III) periodate complex in aqueous alkaline media: A kinetic approach. J CHEM SCI 2010. [DOI: 10.1007/s12039-010-0077-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Hosahalli RV, Byadagi KS, Nandibewoor ST, Chimatadar SA. Kinetics and Mechanism of Oxidation of Chloramphenicol — an Antibiotic Drug by Diperiodatocuprate(III) in Aqueous Alkaline Medium. Z PHYS CHEM 2010. [DOI: 10.1524/zpch.2011.0002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The kinetics of oxidation of chloramphenicol (CHP) by diperiodatocuprate(III) (DPC) in aqueous alkaline medium at a constant ionic strength of 0.10 mol dm-3 was studied spectrophotometrically. The reaction between DPC and CHP in alkaline medium exhibits 1:2 stoichiometry (CHP: DPC). The main oxidation products were identified by spot test, IR, NMR and GCMS spectral studies. The reaction is of first order in DPC and CHP concentrations. As the alkali concentration increases the rate of reaction increases with fractional order dependence on alkali concentration. Increase in periodate concentration decreases the rate. A suitable mechanism is proposed. The reaction constants involved in the different steps of the mechanism were calculated. The activation parameters with respect to slow step of the mechanism are computed and discussed. Thermodynamic quantities are also determined.
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Affiliation(s)
| | - Kirthi S. Byadagi
- Karnatak University, P.G. Department of Studies in Chemistry, Dharwad- 580003, Indien
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Osmium(VIII) catalyzed and uncatalyzed oxidation of a hemorheologic drug Pentoxifylline by alkaline copper(III) periodate complex: A comparative kinetic and mechanistic approach. Polyhedron 2010. [DOI: 10.1016/j.poly.2010.07.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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48
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Lamani SD, Naik PN, Nandibewoor ST. Spectral and Mechanistic Investigation of the Osmium(VIII) Catalyzed Oxidation of Diclofenac Sodium by the Copper(III) Periodate Complex in Aqueous Alkaline Medium. J SOLUTION CHEM 2010. [DOI: 10.1007/s10953-010-9587-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kinetic and Mechanistic Aspects of Osmium(VIII) Catalyzed Oxidation of DL-ornithine by Copper(III) Periodate Complex in Aqueous Alkaline Medium. ACTA ACUST UNITED AC 2010. [DOI: 10.1524/zpch.2010.5521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
AbstractThe oxidation of DL-ornithine monohydrochloride (OMH) by diperiodatocuprate(III) (DPC) has been investigated in the presence of osmium(VIII) catalyst in aqueous alkaline medium at a constant ionic strength of 0.20 mol dm−3spectrophotometrically. The reaction exhibits 1:4 stoichiometry i.e., [OMH]: [DPC]. The order of the reaction with respect to [DPC] was unity while the order with respect to [OMH] was less than unity over the concentration range studied. The rate increased with an increase in [OH–] and decreased with an increase in [IO4−]. The order with respect to [Os(VIII)] was unity. The reaction rates revealed that Os(VIII) catalyzed reaction was about nine-fold faster than the uncatalyzed reaction. The oxidation products were identified by spectral analysis. Suitable mechanism has been proposed. The reaction constants involved in the different steps of the reaction mechanism were calculated. The catalytic constant (KC) was also calculated at different temperatures. The activation parameters with respect to slow step of the mechanism and also the thermodynamic quantities were determined. Kinetic experiments suggest that [OsO4(OH)2]2−is the reactive Os(VIII) species and [Cu(H2IO6)(H2O)2] is the reactive copper(III) species.
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Malode SJ, Abbar JC, Nandibewoor ST. Mechanistic aspects of uncatalyzed and ruthenium(III) catalyzed oxidation of dl-ornithine monohydrochloride by silver(III) periodate complex in aqueous alkaline medium. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.03.081] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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