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Subramani, K.
- Kinetic Analysis of Induced Electron Transfer Reactions in Pentaamminecobalt(III) Complexes of µ-hydroxy Acids and µ-amino Acids by Permonosulphuric Acid in Anionic, Cationic and Neutral Micellar Medium
Abstract Views :277 |
PDF Views:3
Authors
P. Rajkumar
1,
K. Subramani
2
Affiliations
1 Department of Chemistry, Priyadarshini Engineering College, Vaniyambadi-635751, TamilNadu, IN
2 PG and Research Department of Chemistry, Islamiah College, Vaniyambadi-635752, TamilNadu, IN
1 Department of Chemistry, Priyadarshini Engineering College, Vaniyambadi-635751, TamilNadu, IN
2 PG and Research Department of Chemistry, Islamiah College, Vaniyambadi-635752, TamilNadu, IN
Source
Asian Journal of Research in Chemistry, Vol 6, No 4 (2013), Pagination: 364-371Abstract
The Oxidation of Pentaamminecobalt(III) complexes of α-Hydroxy acids and α-Amino acids by PMS has been studied in different Micellar medium. The Oxidation of free α-hydroxy acids and α-amino acids were also carried out under the same conditions for comparative purpose. On comparing these two substrates with PMS oxidation of α-hydroxy acids react faster than α-amino acids. In these reaction the rate of oxidation shows first order kinetics each in [Cobalt (III)] and [PMS].The reaction has followed by observing the decrease in the absorbance at 502 nm for Co(III) complex in a UV-visible spectrophotometer. Product and Stoichiometric analysis were carried out for the oxidation of complexes and free ligands in three different (Anionic, Cationic and Neutral) micellar medium with increasing micellar concentration an increase in the rate is observed. Among three different micelles Cationic micelle of Cetyltrimethylammonium bromide (CTAB) react faster than Anionic micelle of Sodium laurylsulphate(NaLS) and Neutral micelle of Triton. A Mechanism involving the one electron transfer for the complex and two electron transfer for the ligand was proposed.Keywords
Pentaamminecobalt(III) complexes, Triton X-100, Cetyltrimethylammonium bromide (CTAB), Oxidation reaction Mechanism, Permonosulphuric acid(PMS), Sodium laurylsulphate (NaLS).
References
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- Kinetics of Oxidation of Pentaamminecobalt (III) Complexes of α-Hydroxy Acids by Mn(III) Perchlorate in Micellar Medium
Abstract Views :207 |
PDF Views:2
Authors
Affiliations
1 PG Department of Chemistry, H.H. The Rajah’s College (Affiliated to Bharathidasan University, Tiruchirapalli), IN
2 Department of Chemistry, Priyadarshini Engineering College (Affiliated to Anna University, Chennai), IN
3 PG & Research Department of Chemistry, Islamiah College (Affiliated to Thiruvalluvar University, Vellore), IN
1 PG Department of Chemistry, H.H. The Rajah’s College (Affiliated to Bharathidasan University, Tiruchirapalli), IN
2 Department of Chemistry, Priyadarshini Engineering College (Affiliated to Anna University, Chennai), IN
3 PG & Research Department of Chemistry, Islamiah College (Affiliated to Thiruvalluvar University, Vellore), IN
Source
Asian Journal of Research in Chemistry, Vol 9, No 11 (2016), Pagination: 553-560Abstract
The oxidation of pentaamminecobalt(III) complexes of α-hydroxy acids and by Manganese(III) Perchlorate (Mn(III)(ClO4)3) in micellar medium yielding nearly 100% of carbonyl compounds and 100% Co(II) are ultimate products. In this reaction the rate of oxidation shows first order kinetics each in [Co(III)] and [Mn(III)(ClO4)3]. The unbound α-hydroxy acids yield about 100% of carbonyl compounds in presence of micelles. The rate of oxidation of Co(III) complexes of both bound and unbound α-hydroxy acids are enhanced more in the presence of cationic micelle Cetyltrimethylammonium bromide (CTAB), when compared to the anionic micelle of Sodium laurylsulphate (NaLS). The 1 mole of cobalt(III) complexes of α-hydroxy acids reacts with nearly 0.5 mole of Manganese(III) Perchlorate, similarly 1 mole of α-hydroxy acids reacts with nearly 1 mole of Manganese(III) Perchlorate. The reaction goes by free radical mechanism was proved by acrylonitrile polymerization. The appropriate methodology has been inducted.Keywords
Manganese(III) Perchlorate (Mn(III)(ClO4)3), α-Hydroxy Acids, Stoichiometry, Sodium Laurylsulphate (NaLS), Cetyltrimethylammonium Bromide (CTAB).- Synthesis and Characterization of Mikanecic Acid Diesters Using NaH
Abstract Views :188 |
PDF Views:2
Authors
Affiliations
1 R&D Centre, Bharathiar University, Coimbatore, Tamilnadu, IN
1 R&D Centre, Bharathiar University, Coimbatore, Tamilnadu, IN
Source
Asian Journal of Research in Chemistry, Vol 9, No 5 (2016), Pagination: 197-199Abstract
Catalysts are used to make changes easier in the organic synthetic mechanism. Catalysts are involved in the process of chemical changes by reducing time and making it faster to get things done. Catalysts play a vital role in organic synthesis with a novel method for the synthesis of a terpenoid, Mikanecic acid diester. In this research we are using NaH to synthesis Baylis-Hillman adducts (alkyl-3-hydroxy-2-methylenepropanoates reacts with aldehyde with a variety of acrylates catalyzed in presence of TiCl4). Mikanecic acid diesters obtained from 1, 3- butadiene-2-carboxylate of (Diels-Alder type) self-dimerization occur in the presence of different catalysts. The yield which we obtained is in good ratio.Keywords
Baylis-Hillman Adducts, Mikanecic Acid Diester, NaH, THF.- Kinetics and Mechanism of Oxidation of Lactic Acid by Tripropylammonium Halochromates (x=F, C1) in Micellar Medium
Abstract Views :212 |
PDF Views:0
Authors
Affiliations
1 Research and Development Center, Bharathiar University, Coimbatore, Tamil Nadu, IN
2 PG and Research Department of Chemistry, Islamiah College, Vaniyambadi-635752, Tamil Nadu, IN
1 Research and Development Center, Bharathiar University, Coimbatore, Tamil Nadu, IN
2 PG and Research Department of Chemistry, Islamiah College, Vaniyambadi-635752, Tamil Nadu, IN
Source
Asian Journal of Research in Chemistry, Vol 9, No 4 (2016), Pagination: 170-176Abstract
Oxidation of Lactic acid by Two new Cr(VI) oxidants namely Tripropylammonium Fluorochromate (TPAFC) and Tripropylammonium Chlorochromate (TPACC) has been attempted. The oxidation has been studied spectrophotometrically in Perchloric Acid medium with micellar catalyst - Benzalkonium chloride (BKC), a cationic micelle. The reaction follows first order kinetics with respect to Substrate. With increase in concentration of Substrate, Micelle and Perchloric acid, the rate of the reaction gets increased. Rate measurement was carried out at room temperature (30 ± 0.20°C), a decrease in Absorbance was observed. Thermodynamic Parameters has been calculated and computed at different temperatures from 303K to 318K.Product formed were analysed and polymerization test were carried to confirm that the reaction follows ionic mechanism. The kinetic and stoichiometric results have been accounted.Keywords
Lactic Acid, Tripropylammonium Fluorochromate, Tripropylammonium Chlorochromate, Thermodynamic Parameters, Perchloric Acid.- Theoretical Prediction of Reactive Site of Aryl Halide for Suzuki Coupling Reaction
Abstract Views :219 |
PDF Views:1
Authors
Affiliations
1 Department of Chemistry, Islamiah College, Vaniyambadi - 635752, Tamil Nadu, IN
1 Department of Chemistry, Islamiah College, Vaniyambadi - 635752, Tamil Nadu, IN
Source
Asian Journal of Research in Chemistry, Vol 4, No 3 (2011), Pagination: 377-380Abstract
The aryl c-c bond formation is accomplished via Suzuki coupling by treating aryl boronic acid with aryl halide in the presence of Pd (0) complexes and base. The reactivity order of aryl halide is I > Cl > Br for Suzuki coupling. If aryl halide containing different halogen atom as poly substitute, then it does not require any theoretical prediction for reactive side prediction of aryl halide since we know the order of reactivity but if aryl containing more than one same halogen atom in that case theoretical prediction will help us to predict the reactive side of aryl halide. In this work 2,3- dibromo pyridine and 2,5 dibromo pyridine reactivity towards Suzuki coupling is determined by charge density on bromine atom and bond order between the bromine and carbon atom. The aryl halide bromine atom having more electron density is readily reacting with Pd(0) complex in oxidative addition step and in the bond order respect, the aryl halide having smaller value of bond order (carbon halogen bond) is readily reacting with Pd (0) complex in oxidative addition step. The calculations were done semi-empirical level with PM3 Hamiltonian in RHF method.
Keywords
Suzuki Coupling, Oxidative Addition, Bond Order, PM3.- Synthesis of Biphenylamine Derivatives via Suzuki Coupling Reaction
Abstract Views :199 |
PDF Views:1
Authors
Affiliations
1 Department of Chemistry, Islamiah College, Vaniyambadi, PIN- 635751, Tamil Nadu, IN
1 Department of Chemistry, Islamiah College, Vaniyambadi, PIN- 635751, Tamil Nadu, IN
Source
Asian Journal of Research in Chemistry, Vol 4, No 2 (2011), Pagination: 285-288Abstract
The biphenyl amine derivatives has been prepared via suzuki coupling, oxidation of sulfide to sulfonyl and reductive amination. The palladium tetrakistriphenylphosphine was used as a catalyst in suzuki coupling. The sodium periodate and sodium triacetoxyborohydride are used as reagent in oxidation and reductive amination reactions. The intermediates are confirmed by corresponding functional peak in IR spectrum and characterization of final product were done with help of IR, 1H NMR and mass spectral data.
Keywords
Suzuki Coupling, Pd (0) Complex, IR, NMR and Mass.- Microwave Assisted Synthesis and Antifungal Studies of 5-Amino Thiadiazole Substituted Pyrimidine Compounds
Abstract Views :200 |
PDF Views:3
Authors
Affiliations
1 PG & Research Department of Chemistry, Islamiah College, Vaniyambadi-635751, IN
2 Department of Chemistry, Priyadarshini Engineering College, Vaniyambadi, IN
1 PG & Research Department of Chemistry, Islamiah College, Vaniyambadi-635751, IN
2 Department of Chemistry, Priyadarshini Engineering College, Vaniyambadi, IN