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Kinetic, Mechanistic and Spectral Investigations of Oxidation of Gabapentin (neurontin) by Diperiodatoargentate(III) in an Aqueous Alkaline Medium 加巴喷丁(神经素)在碱性水溶液中氧化的动力学、机理和光谱研究
Inorganic Reaction Mechanisms Pub Date : 2006-01-01 DOI: 10.1515/IRM.2006.6.2.131
Ramesh S.SHETTAR,, Sharanappa T.NANDIBEWOOR,
{"title":"Kinetic, Mechanistic and Spectral Investigations of Oxidation of Gabapentin (neurontin) by Diperiodatoargentate(III) in an Aqueous Alkaline Medium","authors":"Ramesh S.SHETTAR,, Sharanappa T.NANDIBEWOOR,","doi":"10.1515/IRM.2006.6.2.131","DOIUrl":"https://doi.org/10.1515/IRM.2006.6.2.131","url":null,"abstract":"The study of the highest accessible oxidation state of transition metals has intrigued many researchers. Transition metals in a higher oxidation state generally can be stabilised by chelation with suitable polydentate ligands. Metal chelates such as diperiodatoargentate(III) [1], ditelluratoargenatate(III) [2], diperiodatonickelate(IV) [3] and diperiodatocuprate(III) [4] are good oxidants in a medium of appropriate pH. In the recent past, interest in the chemistry of silver (III) species has increased significantly because of it being a two electron oxidant and electronically analogous to the copper(III) system [5]. The catalytic effect of Ag+ in redox reactions of S2O8 has been interpreted in several reports by the formation of a silver(III) Inorganic Reaction Mechanisims, Vol. 6, pp. 131-140 © 2006 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":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"6 1","pages":"131 - 140"},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/IRM.2006.6.2.131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66815618","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
Substitution of aqua ligands from cis-[Pt(en)(H2O)2](ClO4)2 and cis-[Pt(dmen)(H2O)2](ClO4)2 (en = ethylenediamine, dmen = N,N′-dimethylethylenediamine) by glutathione (reduced) (GSH) in aqueous medium – A Kinetic And Mechanistic Study. 水介质中顺式-[Pt(en)(H2O)2](ClO4)2和顺式-[Pt(dmen)(H2O)2](ClO4)2 (en =乙二胺，dmen = N,N ' -二甲基乙二胺)的水配体被谷胱甘肽(还原)(GSH)取代的动力学和机理研究
Inorganic Reaction Mechanisms Pub Date : 2003-11-01 DOI: 10.1515/IRM.2003.5.1.65
S. K. Bera, P. Sengupta, G. S. De
{"title":"Substitution of aqua ligands from cis-[Pt(en)(H2O)2](ClO4)2 and cis-[Pt(dmen)(H2O)2](ClO4)2 (en = ethylenediamine, dmen = N,N′-dimethylethylenediamine) by glutathione (reduced) (GSH) in aqueous medium – A Kinetic And Mechanistic Study.","authors":"S. K. Bera, P. Sengupta, G. S. De","doi":"10.1515/IRM.2003.5.1.65","DOIUrl":"https://doi.org/10.1515/IRM.2003.5.1.65","url":null,"abstract":"","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"96 1","pages":"65-72"},"PeriodicalIF":0.0,"publicationDate":"2003-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66816047","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
Site of Bond Breaking in mer-(Dihapto-[60]fullerene) (Dihapto-1, 2-Bis-(Diphenylphosphino)ethane Tricarbonyl Tungsten(0) mer-(Dihapto-[60]富勒烯)(Dihapto- 1,2 - bis -(二苯基膦)乙烷三羰基钨(0)的断键位点
Inorganic Reaction Mechanisms Pub Date : 2003-01-01 DOI: 10.1515/IRM.2003.5.1.13
Yessenia Ocasio-Delgado, L. Rivera-Rivera, Gisela Crespo-Roman, J. E. Cortés-Figueroa
{"title":"Site of Bond Breaking in mer-(Dihapto-[60]fullerene) (Dihapto-1, 2-Bis-(Diphenylphosphino)ethane Tricarbonyl Tungsten(0)","authors":"Yessenia Ocasio-Delgado, L. Rivera-Rivera, Gisela Crespo-Roman, J. E. Cortés-Figueroa","doi":"10.1515/IRM.2003.5.1.13","DOIUrl":"https://doi.org/10.1515/IRM.2003.5.1.13","url":null,"abstract":"","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"5 1","pages":"13-19"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66816044","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: 4
Low-temperature Spectroelectrochemistry of Tetraethylammonium Tris(ethylxanthato)nickelate(II) and Bis(ethylxanthato)nickel(II) Complexes 三(乙基黄原托)镍酸四乙基铵(II)和二(乙基黄原托)镍(II)配合物的低温光谱电化学
Inorganic Reaction Mechanisms Pub Date : 2002-01-01 DOI: 10.1080/1028662021000062527
A. Önal, H. Isci, Ş. Ö. Yaman
{"title":"Low-temperature Spectroelectrochemistry of Tetraethylammonium Tris(ethylxanthato)nickelate(II) and Bis(ethylxanthato)nickel(II) Complexes","authors":"A. Önal, H. Isci, Ş. Ö. Yaman","doi":"10.1080/1028662021000062527","DOIUrl":"https://doi.org/10.1080/1028662021000062527","url":null,"abstract":"One-electron constant potential electrolysis of tetraethylammonium tris(ethylxanthato)nickelate(II), (NEt 4 )[Ni(S 2 COEt) 3 ] and bis(ethylxanthato)nickel(II), Ni(S 2 COEt) 2 , at their lowest oxidation peak potentials, were followed by in situ UV-VIS spectrophotometry, in acetonitrile at 253 K. In both cases [Ni III (S 2 COEt) 3 ] complex formed and detected by its electronic absorption and EPR spectra. [Ni III (S 2 COEt) 3 ] slowly disproportionated to Ni(S 2 COEt) 2 and the dimer of the oxidized ethylxanthate ligand, (S 2 COEt) 2 , with a second-order rate law.","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"4 1","pages":"133-139"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59827289","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
Interaction of Some Azole Bases with Platinum(II)-Glycylglycine--Kinetics, Mechanism and Product Characterization 一些唑基与铂(II)-甘氨酸的相互作用——动力学、机理和产物表征
Inorganic Reaction Mechanisms Pub Date : 2002-01-01 DOI: 10.1080/1028662021000062581
Sukalpa Dey, P. Banerjee
{"title":"Interaction of Some Azole Bases with Platinum(II)-Glycylglycine--Kinetics, Mechanism and Product Characterization","authors":"Sukalpa Dey, P. Banerjee","doi":"10.1080/1028662021000062581","DOIUrl":"https://doi.org/10.1080/1028662021000062581","url":null,"abstract":"The kinetics of the reaction of [Pt(digly)(H 2 O)] (where H 2 digly=glycylglycine) with imidazole, pyrazole and triazole were studied at 25°C in aqueous medium by UV-Vis. spectroscopy at I =0.1 mol dm m 3 in the range of pH=5.05-9.00. The entry of the azole bases by the substitution of aqua ligand was revealed. All the products have been characterized through CHN analysis, IR and 1 H NMR spectra. The pH variation data were fitted by a computer fit program and the reactivity of the different azole base species towards the Pt(II) substrate ascertained.","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"4 1","pages":"159-167"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59827953","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
Metal Complex-promoted Cleavage of RNA Dimers and Trimers: Electrospray Ionisation Mass Spectrometry Evidence for Cleavage 金属配合物促进RNA二聚体和三聚体的切割:电喷雾电离质谱法切割的证据
Inorganic Reaction Mechanisms Pub Date : 2002-01-01 DOI: 10.1080/1028662021000062590
G. D. Iuliis, G. Lawrance, Nicole L. Wilson
{"title":"Metal Complex-promoted Cleavage of RNA Dimers and Trimers: Electrospray Ionisation Mass Spectrometry Evidence for Cleavage","authors":"G. D. Iuliis, G. Lawrance, Nicole L. Wilson","doi":"10.1080/1028662021000062590","DOIUrl":"https://doi.org/10.1080/1028662021000062590","url":null,"abstract":"The cleavage of the RNA dimers GpA and ApUp is promoted by the inert cobalt(III) complex [Co(tren)(OH 2 )(OH)] 2+ (tren= N , N -bis(2-aminoethyl)ethane-1,2-diamine) the reactions being followed spectrophotometrically, with rate enhancements comparable to those observed for that complex reacting with the model phosphodiester bis( p -nitrophenyl)phosphate. Likewise, the labile [Cu(tach)(OH 2 )(OH)] + complex (tach=cyclohexane-1,3,5-triamine) promotes cleavage of the RNA dimer ApA and trimer ApCpC, observed using electrospray ionization mass spectrometry (ESIMS). Mixtures of ApCpC or ApA and the copper complex prepared at room temperature and examined immediately exhibit peaks assigned to the phosphodiesters and their copper complexes. After heating at elevated temperature for several hours, the ESIMS show clear evidence of cleavage, with peaks due to the parent phosphodiester and their initial complexes absent. While the metal complex promotes the reaction, cyclic phosphodiester intermediates observed also ...","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"4 1","pages":"169-186"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/1028662021000062590","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59828045","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
Preparation and Reactions of Methyl Iridium Complexes in Water 甲基铱配合物的制备及其在水中的反应
Inorganic Reaction Mechanisms Pub Date : 2002-01-01 DOI: 10.1080/10286620290034737
A. Bowden, J. L. Kubeika, J. Atwood
{"title":"Preparation and Reactions of Methyl Iridium Complexes in Water","authors":"A. Bowden, J. L. Kubeika, J. Atwood","doi":"10.1080/10286620290034737","DOIUrl":"https://doi.org/10.1080/10286620290034737","url":null,"abstract":"Reactions of methylating agents, MeI and Me 3 OBF 4 , with trans -Ir(CO)(Cl)(TPPTS) 2 (TPPTS=P( m -C 6 H 4 SO 3 Na) 3 ) are examined in H 2 O and DMSO. Three products are observed with MeI in water, Ir(CO)(Cl)(I)(Me)(TPPTS) 2 , Ir(CO)(Cl)(Me)(H 2 O)(TPPTS) 2 + and Ir(CO)(I)(Me)(H 2 O)(TPPTS) 2 + ; reactions in the presence of excess Cl m and I m form Ir(CO)(Cl) 2 (Me)(TPPTS) 2 and Ir(CO)(I) 2 (Me)(TPPTS) 2 , respectively. Reaction of trimethyloxonium + with trans -Ir(CO)(CI)(TPPTS) 2 produced only Ir(CO)(Cl)(Me)(H 2 O)(TPPTS) 2 + . None of the methyl compounds underwent hydrolysis or carbonylation.","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"3 1","pages":"249-254"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/10286620290034737","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59828484","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
Oxidation of l -Hydroxyproline by Aqueous Alkaline Permanganate--A Kinetic Study 碱性高锰酸盐氧化l -羟基脯氨酸的动力学研究
Inorganic Reaction Mechanisms Pub Date : 2002-01-01 DOI: 10.1080/1028662021000003847
S. A. Farokhi, A. K. Kini, S. Nandibewoor
{"title":"Oxidation of l -Hydroxyproline by Aqueous Alkaline Permanganate--A Kinetic Study","authors":"S. A. Farokhi, A. K. Kini, S. Nandibewoor","doi":"10.1080/1028662021000003847","DOIUrl":"https://doi.org/10.1080/1028662021000003847","url":null,"abstract":"The kinetics of oxidation of l -hydroxyproline in aqueous alkaline medium was studied spectrophotometrically. The reaction showed first order kinetics in permanganate ion concentration and an order less than unity in l -hydroxyproline and alkali concentrations. Increasing ionic strength and decreasing dielectric constant of the medium increase the rate. The oxidation reaction proceeds via an alkali-permanganate species which forms a complex with l -hydroxyproline. The latter decomposes slowly, followed by a fast reaction between a free radical of l -hydroxyproline and another molecule of permanganate to give the products. There is a good agreement between the observed and calculated rate constants under different experimental conditions. Investigations at different temperatures allowed the determination of the activation parameters with respect to the slow step of the proposed mechanism.","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"4 1","pages":"67-76"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/1028662021000003847","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59826913","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
Trends in Base Hydrolysis Rates of Chlorocobalt(III) Complexes of a Series of Related Pentaamine Ligands 一系列相关五胺配体氯钴(III)配合物碱水解速率的变化趋势
Inorganic Reaction Mechanisms Pub Date : 2002-01-01 DOI: 10.1080/1028662021000062509
Yakup Baran, P. Comba, G. Lawrance
{"title":"Trends in Base Hydrolysis Rates of Chlorocobalt(III) Complexes of a Series of Related Pentaamine Ligands","authors":"Yakup Baran, P. Comba, G. Lawrance","doi":"10.1080/1028662021000062509","DOIUrl":"https://doi.org/10.1080/1028662021000062509","url":null,"abstract":"Base hydrolysis kinetics of chloropentaaminecobalt(III) complexes of a range of acyclic and cyclic pentaamine ligands, incorporating the rigid -NH-CH 2 -C(CH 3 )(NH 2 )-CH 2 -NH- motif, which must coordinate facially in octahedral complexes, are analysed in terms of ground state structural influences on hydrolysis rates. For complexes without experimental structural data, molecular mechanics was used to predict Co-Cl and Co-N bond distances. The computed strain energies and structural parameters both isomers ( trans and cis ) of all compounds are analysed. Although sterically crowded ligands, which should favour a five-coordinate intermediate, exhibit larger k OH values, only a modest correlation between ground state Co-L distances and hydrolysis rates is found. This suggests that the structures of the transition state and/or of the five-coordinate intermediate is important.","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"4 1","pages":"31-47"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/1028662021000062509","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59827240","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 and Mechanisms of Ligand Exchange Reactions on (Dihapto-Buckminsterfullerene) Pentacarbonyl Tungsten(0) 五羰基钨(0)配体交换反应动力学及机理
Inorganic Reaction Mechanisms Pub Date : 2002-01-01 DOI: 10.1080/1028662021000062491
L. Rivera-Rivera, Frisia D. Colón-Padilla, Yessenia Ocasio-Delgado, Jomary Martínez-Rivera, Samirah Mercado-Feliciano, C. Ramos, J. E. Cortés-Figueroa
{"title":"Kinetics and Mechanisms of Ligand Exchange Reactions on (Dihapto-Buckminsterfullerene) Pentacarbonyl Tungsten(0)","authors":"L. Rivera-Rivera, Frisia D. Colón-Padilla, Yessenia Ocasio-Delgado, Jomary Martínez-Rivera, Samirah Mercado-Feliciano, C. Ramos, J. E. Cortés-Figueroa","doi":"10.1080/1028662021000062491","DOIUrl":"https://doi.org/10.1080/1028662021000062491","url":null,"abstract":"The Lewis bases triphenyl phosphine and triethyl phosphite (L) displace C 60 from ( m 2 -C 60 )W(CO) 5 to produce the complexes ( m 1 -L)W(CO) 5 . These displacement reactions were studied under conditions where the concentrations of C 60 and L were at least 50 times the concentration of ( m 2 -C 60 )W(CO) 5 . The reactions in various solvents were first order with respect to ( m 2 -C 60 )W(CO) 5 . The pseudo first order rate constant values were independent of the concentration and of the nature of L but dependent on the coordinating ability of the solvent under conditions where [C 60 ]/[L] , 0. Under conditions where 0 h [C 60 ]/[L] h 1, the pseudo first order rate constant values decrease as the values of [C 60 ]/[L] increase. Two limiting cases of an interchange displacement of C 60 from ( m 2 -C 60 )W(CO) 5 , whose relative contributions to the overall mechanism depend on the nature of the solvent, are proposed to be a solvent-assisted C 60 -W(CO) 5 bond displacement and a dissociative displacement. ...","PeriodicalId":54977,"journal":{"name":"Inorganic Reaction Mechanisms","volume":"15 1","pages":"49-56"},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59827569","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: 6
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