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Amballa RG, Veeravalli CS, Ganta RK, Korupolu RB, Nowduri A. Mn(II) Catalyzed Oxidation of Atenolol by Cerium(IV) in Aqueous Sulfuric Acid Medium: A Spectrophotometer Aided Kinetic, Mechanistic and Thermodynamic Study. Z PHYS CHEM 2017. [DOI: 10.1515/zpch-2017-0985] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The kinetics and mechanism of manganese(II) catalyzed oxidation of atenolol by cerium(IV) sulfate in aqueous H2SO4 at a constant ionic strength of 0.50 mol dm-3 was studied spectrophotometrically. The reaction showed first order kinetics in cerium(IV) whereas fractional order in both manganese(II) and atenolol. Addition of products showed no effect on the rate of the reaction. The main product, 2-(4-(2-hydroxy-3-oxopropoxy)phenyl)acetamide, was identified with the aid of IR and mass spectral data. Stoichiometry with respect to the drug substrate and reagent was established as 2:1. Added H2SO4, SO4
2− and HSO4
− showed negligible effect on the rate of the reaction. HCe(SO4)3
− was found to be the predominant reactive species under the specified experimental conditions. The rate constants (k), catalytic constant (kc
) and equilibrium constant (K
6) for the proposed mechanism were determined. The kinetic and thermodynamic activation parameters were computed for both the slow rate determining step and complex forming equilibrium step.
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Affiliation(s)
- Ram Gopal Amballa
- Dr V S Krishna Govt. Degree (A) and PG College , Visakhapatnam 530013 , India , Tel.: +919441247706, e-mail:
- Department of Engineering Chemistry, AUCE (A) , Andhra University , Visakhapatnam 530003 , India
| | | | - Ravi Kumar Ganta
- Department of Engineering Chemistry, AUCE (A) , Andhra University , Visakhapatnam 530003 , India
| | - Raghu Babu Korupolu
- Department of Engineering Chemistry, AUCE (A) , Andhra University , Visakhapatnam 530003 , India
| | - Annapurna Nowduri
- Department of Engineering Chemistry, AUCE (A) , Andhra University , Visakhapatnam 530003 , India
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Matthews R. An evaluation of the Ceric-Cerous system as an impurity-insensitive megarad dosimeter. ACTA ACUST UNITED AC 1971. [DOI: 10.1016/0020-708x(71)90124-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Shalek RJ, Smith CE. Chemical dosimetry for the measurement of high-energy photons and electrons. Ann N Y Acad Sci 1969; 161:44-62. [PMID: 4979830 DOI: 10.1111/j.1749-6632.1969.tb34040.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Pikaev AK, Glazunov PY. Mechanism of the radiolytic reduction of quadrivalent cerium in aqueous hydrochloric acid solutions at high-absorbed dose rates. Russ Chem Bull 1964. [DOI: 10.1007/bf00844475] [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]
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