BioInorganic Reaction Mechanisms最新文献_第7页

Salt Effects on Reactivity for Substitution Reactions of Pentacyanoferrate(II) Complexes 盐对五氰铁酸盐(II)配合物取代反应活性的影响

BioInorganic Reaction Mechanisms Pub Date : 2003-01-01 DOI: 10.1515/irm-2003-0107

S. Alshehri, J. Burgess

引用次数: 2

Kinetics and Mechanisms of the Reduction of Chromium(VI) by 2-Mercaptoethanesulfonic Acid in Aqueous Solution: Difference in the Mechanistic Process of Reduction with Noncarboxylate Thiols 2-巯基乙磺酸在水溶液中还原铬(VI)的动力学和机理:与非羧酸硫醇还原机理过程的差异

BioInorganic Reaction Mechanisms Pub Date : 2003-01-01 DOI: 10.1515/irm-2003-0106

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

{"title":"Kinetics and Mechanisms of the Reduction of Chromium(VI) by 2-Mercaptoethanesulfonic Acid in Aqueous Solution: Difference in the Mechanistic Process of Reduction with Noncarboxylate Thiols","authors":"Dwight C. Ramdon, D. Dixon, T. Dasgupta","doi":"10.1515/irm-2003-0106","DOIUrl":"https://doi.org/10.1515/irm-2003-0106","url":null,"abstract":"Abstract The kinetics of the reaction of chromium(VI) with 2-mercaptoethanesulfonic acid (MESA) has been studied spectrophotometrically at wavelength, 435 nm, and ionic strength, I, of 0.50 mol dm-3 (NaClO4) over the ranges: 16.0 < θ < 29.5 °C, 2.6 < pH < 7.1 (citric acid-phosphate buffer), [Cr(VI)]T = 2.0 χ 10-4 mol dm-3, 1.0 χ 10-2 < [MESA]T < 4.0 χ 10-2 mol dm-3. The reaction occurs giving clear indication of the formation of an intermediate, which is assumed to be a typical Cr(VI)-thioester. The decay of the thioester then occurs via a series of electron transfer reactions to give Cr(III). The formation and decay rates of this intermediate have been investigated kinetically and a detailed mechanism for the overall reaction proposed. Experimental data were fitted to rate equations derived from this mechanism. The specific rate constants and corresponding activation parameters were also deduced. The results show that MESA without carboxylate groups, react differently when compared to other thiols having such groups present. This confirms the participating role of carboxylate groups in the formation of the Cr(VI)-thioester. The catalytic effect of added Zn2+ was investigated and its overall role in the reaction of Cr(VI) with MESA was explained.","PeriodicalId":8996,"journal":{"name":"BioInorganic Reaction Mechanisms","volume":"349 1","pages":"47 - 58"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75707661","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: 1

Synthesis, Characterisation and Dissociation of a Glycinate Bridged Trinuclear Co(III)-Cu(II)-Co(III) Complex 甘氨酸桥接三核Co(III)-Cu(II)-Co(III)配合物的合成、表征和解离

BioInorganic Reaction Mechanisms Pub Date : 2003-01-01 DOI: 10.1515/irm-2003-0109

Ν. N. Das, A. Dash, G. S. Brahama, P. Mohanty

引用次数: 0

Substitution of aqua ligands from ds-[Pt(en)(H2O)2](ClO4)2 and cis-[Pt(dmen)(H2O)2](ClO4)2 (en = ethylenediamine, dmen = Ν,Ν′-dimethylethylenediamine) by glutathione (reduced) (GSH) in aqueous medium - A Kinetic And Mechanistic Study. 水介质中谷胱甘肽(还原)(GSH)取代ds-[Pt(en)(H2O)2](ClO4)2和顺式-[Pt(dmen)(H2O)2](ClO4)2 (en =乙二胺，dmen = Ν，Ν ' -二甲基乙二胺)的水配体的动力学和机理研究

BioInorganic Reaction Mechanisms Pub Date : 2003-01-01 DOI: 10.1515/irm-2003-0108

S. K. Bera, P. Sengupta, G. S. De

引用次数: 0

Kinetics and mechanism of reaction of α-picolinic acid with dichloro-{2-(arylazo)- heterocycle}palladium(II) complexes α-吡啶酸与二氯-{2-(芳偶氮)-杂环}钯(II)配合物反应动力学及机理

BioInorganic Reaction Mechanisms Pub Date : 2003-01-01 DOI: 10.1515/irm-2003-0104

G. Rauth, S. Jasimuddin, Ambikesh Mahapatra, C. Sinha

{"title":"Kinetics and mechanism of reaction of α-picolinic acid with dichloro-{2-(arylazo)- heterocycle}palladium(II) complexes","authors":"G. Rauth, S. Jasimuddin, Ambikesh Mahapatra, C. Sinha","doi":"10.1515/irm-2003-0104","DOIUrl":"https://doi.org/10.1515/irm-2003-0104","url":null,"abstract":"Abstract The reaction between Pd(N,N')Cl2 [(N,N'= l-methyl-2-(arylazo)imidazole (RaaiMe), p-RC6H4- N=N-C3H2NN-1 -Me; 2-(arylazo)pyridine (Raap), p-C6H4-N=N-C5H4N; 2- (arylazo)pyrimidine (Raapm), p-C6H4-N=N-C4H3N2; where R=H (a), Me (b), CI (c)] and apicolinic acid (α-picH) have been examined spectrophotometrically in MeCN solution at 298K. The product is Pd(a-pic)2 which has been supported by pure compound synthesis from Na2[PdCl4] and α-picH. The kinetics of the nucleophilic substitution reaction has been studied under pseudo-first-order condition. The reaction proceeds in a biphasic manner. The kinetic analysis confirms the nucleophilic association path. External addition of CI- (LiCl) suppresses the rate. On considering the consecutive reaction A-> B-> C the rate data have been evaluated. Each phase shows first-order dependence on [α-picH]. Rate-1 = {a1+k1[(α-picH]}[ Pd(N,N')Cl2]; rate-2 = {a1+k2[(α-picH]}[Pd(N,N')Cl2], with the k1 (first phase rate constant) > k2 (second phase rate constant). Increase in π-acidity of the ligand N,N' increases the rate and follows the order: Pd(RaaiMe)Cl2 < Pd(Raap)Cl2 < Pd(Raapm)Cl2 .","PeriodicalId":8996,"journal":{"name":"BioInorganic Reaction Mechanisms","volume":"48 1","pages":"31 - 38"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87869238","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: 3

Kinetics of Magnesium Incorporation into Water Soluble Porphyrins 水溶性卟啉中镁的掺入动力学

BioInorganic Reaction Mechanisms Pub Date : 2001-01-01 DOI: 10.1515/irm-2001-0106

Sabrina L. Bailey, P. Hambright

引用次数: 3

Introducing The New Co-Editor Of Inorganic Reaction Mechanisms 无机反应机理新主编简介

BioInorganic Reaction Mechanisms Pub Date : 2001-01-01 DOI: 10.1515/IRM-2001-0101

G. Lawrance

{"title":"Introducing The New Co-Editor Of Inorganic Reaction Mechanisms","authors":"G. Lawrance","doi":"10.1515/IRM-2001-0101","DOIUrl":"https://doi.org/10.1515/IRM-2001-0101","url":null,"abstract":"Professor Peter Moore has accepted appointment as co-editor of Inorganic Reaction Mechanisms, effective from this first issue of Volume 3. Peter Moore is a B.Sc. and Ph.D. graduate of the University of Sheffield, where his doctoral research was supervised by R. G. Wilkins. Following his doctoral studies, he moved in the mid-1960s to a postdoctoral research post with F. Basolo and R. G. Pearson. In terms of a pedigree in inorganic reaction mechanisms, one couldn't ask for a better one! He returned from the USA to the UK and an academic position at the University of Warwick, where he now holds a personal chair in chemistry. Peter was formerly Secretary and Chairman of the Royal Society of Chemistry Inorganic Mechanisms Group, and a founder member and Chairman of the RSC Macrocycles and Supramolecular Chemistry Group, and (jointly with the late Bob Hay) the Coordination Chemistry Discussion Groups. He is currently Chairman of the latter group. He is author of more than 150 papers in learned society journals. Peter brings a depth and breadth of apposite knowledge and experience to the tasks of co-editor that will surely strengthen the journal as it enters the new century. It is fitting that Peter Moore has participated along with our foundation co-editor, the late Robert W. Hay, in expanding the footprint of inorganic chemistry. This is a linkage that provides continuity for the journal. Indeed, this issue commences with a further group of papers dedicated to our late co-editor, and in particular with a contribution co-authored by our new coeditor. I am looking forward to working with Peter on developing Inorganic Reaction Mechanisms further.","PeriodicalId":8996,"journal":{"name":"BioInorganic Reaction Mechanisms","volume":"1 1","pages":"I - II"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85740056","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: 0

Kinetics of Oxidative Deamination and Decarboxylation of L-Asparagine by Alkaline Permanganate: a Mechanistic Approach 碱性高锰酸盐对l -天冬酰胺氧化脱胺和脱羧动力学的机理研究

BioInorganic Reaction Mechanisms Pub Date : 2001-01-01 DOI: 10.1515/irm-2001-0105

M. R. Kembhavi, A. L. Harihar, S. Nandibewoor

引用次数: 2

Interactions of the Aminoglycoside Neamine and 2-Deoxystreptamine with Copper(II) and Zinc(II) 氨基糖苷Neamine和2-脱氧链胺与铜(II)和锌(II)的相互作用

BioInorganic Reaction Mechanisms Pub Date : 2001-01-01 DOI: 10.1515/irm-2001-0104

Yakup Baran, P. Kau, G. Lawrance, Sutrisno, E. I. Nagy-Felsobuki

引用次数: 0

Activation Volumes for a Series of Spontaneous, Acidand Base-Catalysed Aquation Reactions of Aniono trans- [Co(MeNH2)(NH3)4X]2,1+ Complexes (X=Cl-, Br-,ΝO3-,SO42-) 阴离子反式- [Co(MeNH2)(NH3)4X]2,1+配合物(X=Cl-， Br-，ΝO3-，SO42-)自发酸碱催化水化反应的活化体积

BioInorganic Reaction Mechanisms Pub Date : 2001-01-01 DOI: 10.1515/irm-2001-0103

Fabian Benzo, Gabriel González, Manuel A Martínez, B. Sienra

{"title":"Activation Volumes for a Series of Spontaneous, Acidand Base-Catalysed Aquation Reactions of Aniono trans- [Co(MeNH2)(NH3)4X]2,1+ Complexes (X=Cl-, Br-,ΝO3-,SO42-)","authors":"Fabian Benzo, Gabriel González, Manuel A Martínez, B. Sienra","doi":"10.1515/irm-2001-0103","DOIUrl":"https://doi.org/10.1515/irm-2001-0103","url":null,"abstract":"Abstract The volumes of activation for the spontaneous, base-, and acid- catalysed path of the hydrolysis reaction of a series of trans-[Co(MeNH2)(NH3)4X](3-n)+ ions (X = Cl-, Br-, (ONO2)- (OSO3)2-) have been determined in order to establish analogies with the dissociative trends found in previous work with the spontaneous hydrolysis of neutral ligands from the same cores. While for the base catalysed path a significant decrease in the activation volume is found on going from the {Co(NH3)5} to the trans- {Co(MeNH2)(NH3)4} inert skeleton (i.e. 9.8, 12.5, 4.0 and 9.1 cm3 mol-1 for the chloro, bromo, nitrato and sulfato derivatives), no significant changes are observed for the same complexes in the spontaneous reaction. The trends are rationalized in terms of the important changes occurring in electrostriction factors for the DCB and Id intimate mechanisms operating and the important increase in the degree of dissociativeness due to the presence of a trans-methylamino ligand. For the acid catalysed path the differences are much more difficult to assess, specially taking into account the limited information available as well as the inherent errors involved in the rate constant determination.","PeriodicalId":8996,"journal":{"name":"BioInorganic Reaction Mechanisms","volume":"23 1","pages":"25 - 30"},"PeriodicalIF":0.0,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76980305","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