BioInorganic Reaction Mechanisms最新文献_第5页

Kinetic and Mechanistic Study of the Interaction Between cis-[Pt(N-N)(H2O)2](ClO4)2 (N-N = ethylenediamine or N,N′-dimethylethylenediamine) and L-glutamic Acid in Aqueous Medium 顺式-[Pt(N-N)(H2O)2](ClO4)2 (N-N =乙二胺或N,N ' -二甲基乙二胺)与l -谷氨酸相互作用的动力学和机理研究

BioInorganic Reaction Mechanisms Pub Date : 2005-01-01 DOI: 10.1515/IRM.2005.5.3.173

S. K. Bera, Swapan K. Chandra, G. S. De

引用次数: 0

Kinetic Study of the Reversible Hydroxide Addition Reaction to a Hexafluoro-2,4-pentanedionato Chelate on a Cobalt(III) Complex 钴(III)配合物上六氟-2,4-戊二酮螯合物可逆氢氧加成反应动力学研究

BioInorganic Reaction Mechanisms Pub Date : 2005-01-01 DOI: 10.1515/IRM.2005.5.3.213

Y. Kitamura, Y. Sasaki, Hiroshi Tanaka

引用次数: 0

Kinetics of the Reduction of Colloidal MnO2 by Citric Acid in the Absence and Presence of Ionic and Non-ionic Surfactants 柠檬酸在不存在和不存在离子和非离子表面活性剂的情况下还原胶体MnO2的动力学

BioInorganic Reaction Mechanisms Pub Date : 2005-01-01 DOI: 10.1515/IRM.2005.5.3.151

Kabir-ud-din, S. Iqubal, Z. Khan

{"title":"Kinetics of the Reduction of Colloidal MnO2 by Citric Acid in the Absence and Presence of Ionic and Non-ionic Surfactants","authors":"Kabir-ud-din, S. Iqubal, Z. Khan","doi":"10.1515/IRM.2005.5.3.151","DOIUrl":"https://doi.org/10.1515/IRM.2005.5.3.151","url":null,"abstract":"Perez-Benito and his coworkers [1] found first time quantitatively that water soluble colloidal manganese dioxide, prepared from reduction of aqueous potassium permanganate by sodium thiosulphate under neutral condition [2,3], was perfectly transparent and stable for several months. Manganese dioxide (as aqueous suspension) has been used as an oxidizing [4-7] and catalytic [8,9] agent of inorganic/organic compounds. The transparent sols of manganese dioxide too are of importance due to their involvement as active autocatalysts in many permanganate oxidations [10-12]. Surfactants are referred to as amphiphilic, amphipathic, heteropolar or polar/nonpolar compounds due to the characteristic of possessing distinct hydrophobic (water-repelling) and hydrophilic (water-loving) regions in their molecules. The interest in using surfactants as reaction media is that they affect rates, products and, in some cases, stereochemistry of the reactions [13-15]. Studies of chemical reactions in micellar media could provide understanding even about the reactions taking place at Inorganic Reaction Mechanisims, Vol. 5, pp. 151-166 © 2005 Old City Publishing, Inc. Reprints available directly from the publisher Published by license under the OCP Science imprint, Photocopying permitted by license only a member of the Old City Publishing Group.","PeriodicalId":8996,"journal":{"name":"BioInorganic Reaction Mechanisms","volume":"22 1","pages":"151 - 166"},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83252885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Mechanistic Studies of the Reaction between Thioglycolic Acid and Chromium(VI): Substitution, Isomerisation, and Electron Transfer 巯基乙酸与铬(VI)反应的机理研究:取代、异构化和电子转移

BioInorganic Reaction Mechanisms Pub Date : 2005-01-01 DOI: 10.1515/IRM.2005.5.3.197

Dwight C. Ramdon, D. Dixon, T. Dasgupta

{"title":"Mechanistic Studies of the Reaction between Thioglycolic Acid and Chromium(VI): Substitution, Isomerisation, and Electron Transfer","authors":"Dwight C. Ramdon, D. Dixon, T. Dasgupta","doi":"10.1515/IRM.2005.5.3.197","DOIUrl":"https://doi.org/10.1515/IRM.2005.5.3.197","url":null,"abstract":"Thioglycolic Acid, H2TGA, containing a reactive sulphydryl group, has been shown to reduce Cr(VI). The experimental conditions were [Cr(VI)]T = 0.20 mM, [TGA]T = 22 – 100 mM, 15.0 ≤ T ≤ 30.0 °C, 2.66 ≤ pH ≤ 4.66 (TGA self-buffer) or 2.74 ≤ pH ≤ 6.05 (citric acid-phosphate) at a constant ionic strength of 0.50 M (NaClO4). The reaction was studied using rapid scanning stopped-flow spectrophotometry at λ = 425 nm. The kinetics of the reaction showed distinct spectral evidence for the formation of an intermediate that was subsequently followed by a slower, bimolecular redox process leading to the formation of the final products. Based on the analysis of the experimental data, the formation of the intermediate involved the conversion of an O-bonded Cr(VI)-thioglycolate intermediate, O3CrOC(O)CH2SH, to the Sbonded type O3CrSCH2COOH, prior to the redox step. Normal acid-base equilibria of thioglycolate ( H2TGA / HTGA) and chromate species ( HCrO4 / CrO4 2) were found to be inadequate to explain the overall mechanism. Instead, the facile reactions of both O-bonded and S-bonded Cr(VI)-thioglycolate intermediates were seen to be influenced by their own proton dependency. It was found that depending on the nature of the buffer used, some catalytic effects were evident, but the complete pH profile obtained was inherently peculiar to the reaction involving the main reactants. Added metal ions such as Cu2+ and Zn2+ are implicated in the overall course of the reaction, and their effects also seem to be determined by the concentration of [H +] utilized.","PeriodicalId":8996,"journal":{"name":"BioInorganic Reaction Mechanisms","volume":"150 1","pages":"197 - 211"},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75774042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Kinetics and Mechanism of the Oxidation of Inorganic Oxysulfur Compounds by Potassium Ferrate Part IV - A Theoretical Analysis of Four Models Proposed to Explain Some of the Unusual Results for Trithionate, Tetrathionate and Pentathionate Ions 高铁酸钾氧化无机含氧硫化合物的动力学和机理——对三硫酸盐、四硫酸盐和五硫酸盐离子异常反应的四种模型的理论分析

BioInorganic Reaction Mechanisms Pub Date : 2005-01-01 DOI: 10.1515/IRM.2005.5.4.305

J. F. Read, S. Bewick

引用次数: 5

Kinetics and Mechanism of the Reduction of Enneamolybdonickelate(IV) by Oxalate 草酸还原enneamolydonickelate (IV)的动力学及机理

BioInorganic Reaction Mechanisms Pub Date : 2005-01-01 DOI: 10.1515/IRM.2005.5.3.167

G. Huo, Xuguang Zhao, Bao-Sheng Liu

引用次数: 0

Ruthenium(III) Catalysed Oxidation of L-Alanine by Alkaline Permanganate: A Kinetic and Mechanistic Approach 钌(III)催化碱性高锰酸盐氧化l -丙氨酸的动力学和机理研究

BioInorganic Reaction Mechanisms Pub Date : 2005-01-01 DOI: 10.1515/IRM.2005.5.3.231

S. Chimatadar, A. K. Kini, S. Nandibewoor

{"title":"Ruthenium(III) Catalysed Oxidation of L-Alanine by Alkaline Permanganate: A Kinetic and Mechanistic Approach","authors":"S. Chimatadar, A. K. Kini, S. Nandibewoor","doi":"10.1515/IRM.2005.5.3.231","DOIUrl":"https://doi.org/10.1515/IRM.2005.5.3.231","url":null,"abstract":"Potassium permanganate is widely used as an oxidising agent in synthetic as well as in analytical chemistry, and also as a disinfectant. The permanganate reactions are governed by the pH of the medium. Among the six oxidation states of manganese (+2 to+ 7), permanganate, Mn(VII) is the most potent oxidation state in acid as well as in alkaline medium. The manganese chemistry involved in these multistep redox reactions provides an important source of information as the manganese intermediates are relatively easy to identify when they have sufficiently long life times. 0xidation states of the intermediates permit useful conclusions to be drawn as to the possible reaction mechanism, including the nature of intermediates. Oxidation by permanganate ion is applied extensively in organic syntheses [1-7] especially since the advent of phase transfer catalysis [3,4,6]. Kinetic studies are important Inorganic Reaction Mechanisims, Vol. 5, pp. 231-244 © 2005 Old City Publishing, Inc. Reprints available directly from the publisher Published by license under the OCP Science imprint, Photocopying permitted by license only a member of the Old City Publishing Group.","PeriodicalId":8996,"journal":{"name":"BioInorganic Reaction Mechanisms","volume":"33 1","pages":"231 - 244"},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81106432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

The Kinetics and Mechanism of the Oxidation of Inorganic Oxysulfur Compounds by Potassium Ferrate Part III - Trithionate and Pentathionate Ions 高铁酸钾氧化无机含氧硫化合物的动力学和机理。第三部分-三硫酸盐和五硫酸盐离子

BioInorganic Reaction Mechanisms Pub Date : 2005-01-01 DOI: 10.1515/IRM.2005.5.4.281

J. F. Read, S. Bewick, Sandra C. Donaher, M. D. Eelman, J. Oakey, Catherine Schaubel, Nga Chiu Tam, Annie Thériault, K. Watson

引用次数: 5

Oxidation of Arsenous Acid by 12-Tungstocobaltate(III) Catalysed by Ruthenium(III) in Aqueous Acid Medium 酸水溶液中钌催化12-钴酸钨(III)氧化亚砷酸的研究

BioInorganic Reaction Mechanisms Pub Date : 2004-08-01 DOI: 10.1515/IRM.2004.5.2.79

B. D. Bhosale, G. Gokavi

引用次数: 3

The Kinetics and Mechanism of the Oxidation of Phenylthioacetic Acid and Thiodiglycolic Acid by Potassium Ferrate 高铁酸钾氧化苯硫代乙酸和硫代二乙醇酸的动力学及机理

BioInorganic Reaction Mechanisms Pub Date : 2004-01-01 DOI: 10.1515/IRM.2004.5.2.135

J. F. Read, B. Griffiths, L. Lynch, K. Maccormick, Nga Chiu Tam

引用次数: 3