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Gridchin SN. Thermodynamic Characteristics of the Protolytic Equilibria of Glycyl-Alanine and Glycyl-Histidine. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422040100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Elinburg JK, Hyre AS, McNeely J, Alam TM, Klenner S, Pöttgen R, Rheingold AL, Doerrer LH. Formation of monomeric Sn(ii) and Sn(iv) perfluoropinacolate complexes and their characterization by 119Sn Mössbauer and 119Sn NMR spectroscopies. Dalton Trans 2020; 49:13773-13785. [PMID: 33000834 DOI: 10.1039/d0dt02837a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and characterization of a series of Sn(ii) and Sn(iv) complexes supported by the highly electron-withdrawing dianionic perfluoropinacolate (pinF) ligand are reported herein. Three analogs of [SnIV(pinF)3]2- with NEt3H+ (1), K+ (2), and {K(18C6)}+ (3) counter cations and two analogs of [SnII(pinF)2]2- with K+ (4) and {K(15C5)2}+ (5) counter cations were prepared and characterized by standard analytical methods, single-crystal X-ray diffraction, and 119Sn Mössbauer and NMR spectroscopies. The six-coordinate SnIV(pinF) complexes display 119Sn NMR resonances and 119Sn Mössbauer spectra similar to SnO2 (cassiterite). In contrast, the four-coordinate SnII(pinF) complexes, featuring a stereochemically-active lone pair, possess low 119Sn NMR chemical shifts and relatively high quadrupolar splitting. Furthermore, the Sn(ii) complexes are unreactive towards both Lewis bases (pyridine, NEt3) and acids (BX3, Et3NH+). Calculations confirm that the Sn(ii) lone pair is localized within the 5s orbital and reveal that the Sn 5px LUMO is energetically inaccessible, which effectively abates reactivity.
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Affiliation(s)
- Jessica K Elinburg
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA.
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3
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Cardiano P, Foti C, Giuffrè O. Removal of di- and tri-alkyltin(IV) compounds by polyphosphonate ligand: A speciation perspective. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.05.067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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4
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Kumari R, Nath M. Speciation and Multinuclear NMR Spectroscopic Studies of Di- and Trimethyltin(IV) Moieties with MESNA in Aqueous Medium. J SOLUTION CHEM 2017. [DOI: 10.1007/s10953-017-0654-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Latrous L, Salpin JY, Haldys V, Léon E, Correia C, Lamsabhi AM. Gas-phase interactions of organotin compounds with cysteine. JOURNAL OF MASS SPECTROMETRY : JMS 2016; 51:1006-1015. [PMID: 27428725 DOI: 10.1002/jms.3812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 07/02/2016] [Accepted: 07/12/2016] [Indexed: 06/06/2023]
Abstract
The gas-phase interactions of cysteine with di-organotin and tri-organotin compounds have been studied by mass spectrometry experiments and quantum calculations. Positive-ion electrospray spectra show that the interaction of di- and tri-organotins with cysteine results in the formation of [(R)2 Sn(Cys-H)]+ and [(R)3 Sn(Cys)]+ ions, respectively. MS/MS spectra of [(R)2 Sn(Cys-H)]+ complexes are characterized by numerous fragmentation processes, notably associated with elimination of NH3 and (C,H2 ,O2 ). Several dissociation routes are characteristic of each given organic species. Upon collision, both the [(R)3 Sn(Gly)]+ and [(R)3 Sn(Cys)]+ complexes are associated with elimination of the intact amino acid, leading to the formation of [(R)3 Sn]+ cation. But for the latter complex, two additional fragmentation processes are observed, associated with the elimination of NH3 and C3 H4 O2 S. Calculations indicate that the interaction between organotins and cysteine is predominantly electrostatic but also exhibits a considerable covalent character, which is slightly more pronounced in tri-organotin complexes. A preferred bidentate interaction of the type -η2 -S-NH2 , with sulfur and the amino group, is observed. As for the [(R)3 Sn(Cys)]+ complexes, their stability is due to the combination of the hydrogen bond taking place between the amino group and the sulfur lone pair and the interaction between the carboxylic oxygen atom and the metal. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Latifa Latrous
- Laboratoire de Chimie Analytique et Electrochimie Campus Universitaire, Faculté des Sciences de Tunis, Université de Tunis El Manar, 2092, Tunis, Tunisia.
| | - Jean-Yves Salpin
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, Université d'Evry Val d'Essonne, Bâtiment Maupertuis-Boulevard François Mitterrand, 91025, Evry, France
- CNRS-UMR 8587, Evry, France
| | - Violette Haldys
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, Université d'Evry Val d'Essonne, Bâtiment Maupertuis-Boulevard François Mitterrand, 91025, Evry, France
- CNRS-UMR 8587, Evry, France
| | - Emmanuelle Léon
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, Université d'Evry Val d'Essonne, Bâtiment Maupertuis-Boulevard François Mitterrand, 91025, Evry, France
- CNRS-UMR 8587, Evry, France
| | - Catarina Correia
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, Université d'Evry Val d'Essonne, Bâtiment Maupertuis-Boulevard François Mitterrand, 91025, Evry, France
- CNRS-UMR 8587, Evry, France
| | - Al Mokhtar Lamsabhi
- Departamento de Química, Ciencias, M-13, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC Cantoblanco, 28049, Madrid, Spain
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Mridula, Nath M. Equilibrium and Multinuclear NMR Spectroscopic Studies of Di- and Trimethyltin(IV) Moieties with Hydroxycarboxylic Acids in Aqueous Medium. J SOLUTION CHEM 2016. [DOI: 10.1007/s10953-016-0448-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Spectrophotometric Determination of Equilibrium Constants of Dimethyl and Diethyltin(IV) Dichloride with 5,10,15,20-Tetrakis(4-trimethyl-ammonio-phenyl)-prophine Tetratosylate. J SOLUTION CHEM 2015. [DOI: 10.1007/s10953-015-0290-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Nath M, Kompelli N. Speciation and NMR Spectrometric Studies of Interaction of Di- and Tri-organotin(IV) Moieties with 5′-Guanosine Monophosphate and Guanosine in Aqueous Solution. J SOLUTION CHEM 2014. [DOI: 10.1007/s10953-014-0186-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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EL-Gahami MA, Al-Bogami AS, Albishri HM. Medium effect on the dimethyltin(IV) complexes of 2-(N-morpholino) ethanesulfonic and 3-(N-morpholino) propanesulfonic acid. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.12.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Cardiano P, Falcone G, Foti C, Giuffrè O, Napoli A. Binding ability of glutathione towards alkyltin(IV) compounds in aqueous solution. J Inorg Biochem 2013; 129:84-93. [DOI: 10.1016/j.jinorgbio.2013.09.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 09/04/2013] [Accepted: 09/05/2013] [Indexed: 11/16/2022]
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Potentiometry, Stability and Thermodynamics of Diethyltin(IV) Dichloride with Some Selected Biomolecules. J SOLUTION CHEM 2013. [DOI: 10.1007/s10953-013-0104-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Equilibrium Studies of Dibutyltin(IV)-Zwitterionic Buffer Complexation. J SOLUTION CHEM 2013; 42:2012-2024. [PMID: 24273357 PMCID: PMC3825530 DOI: 10.1007/s10953-013-0088-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Accepted: 06/01/2013] [Indexed: 11/11/2022]
Abstract
Equilibrium studies in aqueous solution are reported for dibutyltin(IV) (DBT) complexes of the zwitterionic buffers “Good’s buffers” Mes and Mops. Stoichiometric and formation constants of the complexes formed were determined at different temperatures and ionic strength 0.1 mol·L−1 NaNO3. The results show that the best fit of the titration curves were obtained when the complexes ML, MLH−1, MLH−2 and MLH−3 were considered beside the hydrolysis product of the dibutyltin(IV) cation. The thermodynamic parameters ΔHo, ΔSo and ΔGo calculated from the temperature dependence of the formation constant of the dibutyltin(IV) complexes with 2-(N-morpholino)ethanesulfonic acid (Mes) and 3-(N-mor-pholino)-propanesulfonic acid (Mops) were investigated. The effect of dioxane as a solvent on the formation constants of DBT–Mes and DBT–Mops complexes decrease linearly with the increase of dioxane proportion in the medium. The concentration distribution of the various complexes species was evaluated as a function of pH.
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Latrous L, Tortajada J, Haldys V, Léon E, Correia C, Salpin JY. Gas-phase interactions of organotin compounds with glycine. JOURNAL OF MASS SPECTROMETRY : JMS 2013; 48:795-806. [PMID: 23832935 DOI: 10.1002/jms.3223] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 03/08/2013] [Accepted: 04/22/2013] [Indexed: 06/02/2023]
Abstract
Gas-phase interactions of organotins with glycine have been studied by combining mass spectrometry experiments and quantum calculations. Positive-ion electrospray spectra show that the interaction of di- and tri-organotins with glycine results in the formation of [(R)2Sn(Gly)-H](+) and [(R)3Sn(Gly)](+) ions, respectively. Di-organotin complexes appear much more reactive than those involving tri-organotins. (MS/MS) spectra of the [(R)3Sn(Gly)](+) ions are indeed simple and only show elimination of intact glycine, generating the [(R)3Sn](+) carbocation. On the other hand, MS/MS spectra of [(R)2Sn(Gly)-H](+) complexes are characterized by numerous fragmentation processes. Six of them, associated with elimination of H2O, CO, H2O + CO and formation of [(R)2SnOH](+) (-57 u),[(R)2SnNH2](+) (-58 u) and [(R)2SnH](+) (-73 u), are systematically observed. Use of labeled glycines notably concludes that the hydrogen atoms eliminated in water and H2O + CO are labile hydrogens. A similar conclusion can be made for hydrogens of [(R2)SnOH](+) and [(R2)SnNH2](+) ions. Interestingly, formation [(R)2SnH](+) ions is characterized by a migration of one the α hydrogen of glycine onto the metallic center. Finally, several dissociation routes are observed and are characteristic of a given organic substituent. Calculations indicated that the interaction between organotins and glycine is mostly electrostatic. For [(R)2Sn(Gly)-H](+) complexes, a preferable bidentate interaction of the type η(2)-O,NH2 is observed, similar to that encountered for other metal ions. [(R)3Sn](+) ions strongly stabilize the zwitterionic form of glycine, which is practically degenerate with respect to neutral glycine. In addition, the interconversion between both forms is almost barrierless. Suitable mechanisms are proposed in order to account for the most relevant fragmentation processes.
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Affiliation(s)
- Latifa Latrous
- Laboratoire de Chimie-Analytique et Electrochimie, Département de Chimie, Faculté des Sciences de Tunis, Campus Universitaire, 2092, El Manar, Tunis, Tunisia.
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Sóvágó I, Kállay C, Várnagy K. Peptides as complexing agents: Factors influencing the structure and thermodynamic stability of peptide complexes. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.02.026] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Gianguzza A, Giuffrè O, Piazzese D, Sammartano S. Aqueous solution chemistry of alkyltin(IV) compounds for speciation studies in biological fluids and natural waters. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2011.06.027] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Chauvin T, Torres S, Rosseto R, Kotek J, Badet B, Durand P, Tóth E. Lanthanide(III) complexes that contain a self-immolative arm: potential enzyme responsive contrast agents for magnetic resonance imaging. Chemistry 2011; 18:1408-18. [PMID: 22213022 DOI: 10.1002/chem.201101779] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 10/21/2011] [Indexed: 11/11/2022]
Abstract
Enzyme-responsive MRI-contrast agents containing a "self-immolative" benzylcarbamate moiety that links the MRI-reporter lanthanide complex to a specific enzyme substrate have been developed. The enzymatic cleavage initiates an electronic cascade reaction that leads to a structural change in the Ln(III) complex, with a concomitant response in its MRI-contrast-enhancing properties. We synthesized and investigated a series of Gd(3+) and Yb(3+) complexes, including those bearing a self-immolative arm and a sugar unit as selective substrates for β-galactosidase; we synthesized complex LnL(1), its NH(2) amine derivatives formed after enzymatic cleavage, LnL(2), and two model compounds, LnL(3) and LnL(4). All of the Gd(3+) complexes synthesized have a single inner-sphere water molecule. The relaxivity change upon enzymatic cleavage is limited (3.68 vs. 3.15 mM(-1) s(-1) for complexes GdL(1) and GdL(2), respectively; 37 °C, 60 MHz), which prevents application of this system as an enzyme-responsive T(1) relaxation agent. Variable-temperature (17)O NMR spectroscopy and (1)H NMRD (nuclear magnetic relaxation dispersion) analysis were used to assess the parameters that determine proton relaxivity for the Gd(3+) complexes, including the water-exchange rate (k(ex)(298), varies in the range 1.5-3.9×10(6) s(-1)). Following the enzymatic reaction, the chelates contain an exocyclic amine that is not protonated at physiological pH, as deduced from pH-potentiometric measurements (log K(H)=5.12(±0.01) and 5.99(±0.01) for GdL(2) and GdL(3), respectively). The Yb(3+) analogues show a PARACEST effect after enzymatic cleavage that can be exploited for the specific detection of enzymatic activity. The proton-exchange rates were determined at various pH values for the amine derivatives by using the dependency of the CEST effect on concentration, saturation time, and saturation power. A concentration-independent analysis of the saturation-power-dependency data was also applied. All these different methods showed that the exchange rate of the amine protons of the Yb(III) complexes decreases with increasing pH value (for YbL(3), k(ex)=1300 s(-1) at pH 8.4 vs. 6000 s(-1) at pH 6.4), thereby resulting in a diminution of the observed CEST effect.
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Affiliation(s)
- Thomas Chauvin
- Centre de Biophysique Moléculaire, CNRS, rue Charles Sadron, 45071 Orléans, France
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18
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Naumov VV, Isaeva VA, Sharnin VA, Kuzina EN. Constants of acid-base equilibria of glycylglycine in water-dimethyl sulfoxide solutions at 298 K. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2011. [DOI: 10.1134/s003602441110013x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Naumov VV, Isaeva VA, Sharnin VA. Nickel(II) complexing with glycylglycine and acid-base equilibria of the ligand in aqueous ethanol solvents. RUSS J INORG CHEM+ 2011. [DOI: 10.1134/s0036023611070199] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Amin MM, Ali S, Shahzadi S, Sharma SK, Qanungo K. Di- and triorganotin(IV) complexes of 2-aminobenzoic acid with and without triphenylphosphine: synthesis, spectroscopy, semi-empirical study, and antimicrobial activities. J COORD CHEM 2011. [DOI: 10.1080/00958972.2010.544036] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Saqib Ali
- b Department of Chemistry , Quaid-i-Azam University , Islamabad 45320, Pakistan
| | - Saira Shahzadi
- a Department of Chemistry , GC University , Faisalabad, Pakistan
| | - Saroj K. Sharma
- c Department of Applied Science and Humanities, Faculty of Engineering and Technology , Mody Institute of Technology and Science , Lakshmangargh 332311, Sikar, Rajasthan, India
| | - Kushal Qanungo
- c Department of Applied Science and Humanities, Faculty of Engineering and Technology , Mody Institute of Technology and Science , Lakshmangargh 332311, Sikar, Rajasthan, India
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Abd-Alla EM, Mohamed MM, Mahmoud MR. Complex Formation Reactions of Dimethyltin(IV) with Some Zwitterionic Buffers. J COORD CHEM 2010. [DOI: 10.1080/0095897031000113995] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Elham M. Abd-Alla
- a Department of Chemistry Faculty of Science , Minia University , Minia, Egypt
| | - Mahmoud M.A. Mohamed
- b Department of Chemistry Faculty of Education , Assuit University , New Valley, Egypt
| | - Mohamed R. Mahmoud
- c Department of Chemistry Faculty of Science , Assuit University , Assuit, Egypt
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Sequestration of Alkyltin(IV) compounds in aqueous solution: formation, stability, and empirical relationships for the binding of dimethyltin(IV) cation by N- and O-donor ligands. Bioinorg Chem Appl 2009:219818. [PMID: 19590597 PMCID: PMC2706388 DOI: 10.1155/2009/219818] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Revised: 03/09/2009] [Accepted: 04/06/2009] [Indexed: 11/21/2022] Open
Abstract
The sequestering ability of polyamines and aminoacids of biological and environmental relevance (namely, ethylenediamine, putrescine, spermine, a polyallylamine, a branched polyethyleneimine, aspartate, glycinate, lysinate) toward dimethyltin(IV) cation was evaluated. The stability of various dimethyltin(IV) / ligand species was determined in NaClaq at t = 25°C and at different ionic strengths (0.1 ≤ I/mol L−1 ≤ 1.0), and the dependence of stability constants on this parameter was modeled by an Extended Debye-Hückel equation and by Specific ion Interaction Theory (SIT) approach. At I = 0.1 mol L−1, for the ML species we have log K = 10.8, 14.2, 12.0, 14.7, 11.9, 7.7, 13.7, and 8.0 for ethylenediamine, putrescine, polyallylamine, spermine, polyethyleneimine, glycinate, lysinate, and aspartate, respectively. The sequestering ability toward dimethyltin(IV) cation was defined by calculating the parameter pL50 (the total ligand concentration, as −log CL, able to bind 50% of metal cation), able to give an objective representation of this ability. Equations were formulated to model the dependence of pL50 on different variables, such as ionic strength and pH, and other empirical predictive relationships were also found.
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Hussain M, Hanif M, Ali S, Shahzadi S, Ahmad MS, Mirza B, Evans HS. Synthesis and coordination chemistry of organotin(IV) complexes of 2,3-methylenedioxyphenylpropenoic acid. J COORD CHEM 2009. [DOI: 10.1080/00958970902803325] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Mukhtiar Hussain
- a Department of Chemistry , Quaid-i-Azam University , Islamabad-45320, Pakistan
| | - Muhammad Hanif
- a Department of Chemistry , Quaid-i-Azam University , Islamabad-45320, Pakistan
| | - Saqib Ali
- a Department of Chemistry , Quaid-i-Azam University , Islamabad-45320, Pakistan
| | - Saira Shahzadi
- b Department of Chemistry , GC University , Faisalabad, Pakistan
| | | | - Bushra Mirza
- c Department of Biochemistry , Quaid-i-Azam University , Islamabad-45320, Pakistan
| | - Helen S. Evans
- d Institute of Microtechnology , University of Neuchatel , Rue Emile-Argand 11, CH-2009 Neuchatel, Switzerland
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Cardiano P, Giuffrè O, Napoli A, Sammartano S. Potentiometric, 1H NMR and ESI-MS investigation on dimethyltin(iv) cation–mercaptocarboxylate interaction in aqueous solution. NEW J CHEM 2009. [DOI: 10.1039/b908114c] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Isaeva VA, Naumov VV, Gesse ZF, Sharnin VA. The influence of water-acetone solvents on the acid-base properties of glycylglycine. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2009. [DOI: 10.1134/s0036024409030133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Casella G, Ferrante F, Saielli G. DFT Calculation of 1J(119Sn,13C) and 2J(119Sn,1H) Coupling Constants in Di- and Trimethyltin(IV) Compounds. Inorg Chem 2008; 47:4796-807. [DOI: 10.1021/ic8000976] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Girolamo Casella
- Dipartimento di Chimica Inorganica e Analitica “Stanislao Cannizzaro”, Università di Palermo, Viale delle Scienze, Parco D’Orleans II, Ed. 17, 90128 Palermo, Italy, Dipartimento di Chimica Fisica “Filippo Accascina”, Università di Palermo, Viale delle Scienze, Parco D’Orleans II, Ed. 17, 90128 Palermo, Italy, and Istituto per la Tecnologia delle Membrane del CNR, Sezione di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Francesco Ferrante
- Dipartimento di Chimica Inorganica e Analitica “Stanislao Cannizzaro”, Università di Palermo, Viale delle Scienze, Parco D’Orleans II, Ed. 17, 90128 Palermo, Italy, Dipartimento di Chimica Fisica “Filippo Accascina”, Università di Palermo, Viale delle Scienze, Parco D’Orleans II, Ed. 17, 90128 Palermo, Italy, and Istituto per la Tecnologia delle Membrane del CNR, Sezione di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Giacomo Saielli
- Dipartimento di Chimica Inorganica e Analitica “Stanislao Cannizzaro”, Università di Palermo, Viale delle Scienze, Parco D’Orleans II, Ed. 17, 90128 Palermo, Italy, Dipartimento di Chimica Fisica “Filippo Accascina”, Università di Palermo, Viale delle Scienze, Parco D’Orleans II, Ed. 17, 90128 Palermo, Italy, and Istituto per la Tecnologia delle Membrane del CNR, Sezione di Padova, Via Marzolo 1, 35131 Padova, Italy
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Cardiano P, De Stefano C, Giuffrè O, Sammartano S. Thermodynamic and spectroscopic study for the interaction of dimethyltin(IV) with L–cysteine in aqueous solution. Biophys Chem 2008; 133:19-27. [DOI: 10.1016/j.bpc.2007.11.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2007] [Revised: 11/15/2007] [Accepted: 11/15/2007] [Indexed: 11/29/2022]
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Mohamed MMA. Complex formation reactions of lanthanum(III), cerium(III), thorium(IV), dioxouranyl(IV) complexes with tricine. ANNALI DI CHIMICA 2007; 97:759-70. [PMID: 17899888 DOI: 10.1002/adic.200790059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Equilibrium studies for the heavy metal ions La(III), Ce(III), Th(IV) and UO2(IV) (M) complexes of the zwitterionic buffer tricine (L) in aqueous solution are investigated. Stoichiometry and stability constants for the different complexes formed as well as hydrolysis products of the metal cations are determined at 25 degrees C and ionic strength 0.1 M NaNO3. The stability of the formed complexes are discussed in terms of the nature of the heavy metal cation. The solid complexes are synthesized and characterized by means of elemental analysis, FTIR, and TG analysis. The general molecular formulae of the obtained complexes is suggested to be [M(L)2](NO3)n-2(H2O)x, where n = the charge of the metal cation, x = no. of water molecules.
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Affiliation(s)
- Mahmoud M A Mohamed
- Department of Sciences and Mathematics, New Valley-Faculty of Education, Assiut University, El-Kharga, New Valley, Egypt.
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30
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Mohamed MMA. Equilibrium studies, synthesis and characterisation of zwitterionic buffer (HEPES and HEPPS) dimethyltin(IV) complexes. MAIN GROUP CHEMISTRY 2007. [DOI: 10.1080/10241220701786701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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31
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Mohamed MM, Abd-Alla EM, El-Badawy AES. Dimethyltin(IV) complexes with zwitterionic buffers (Mes and Mops). J Organomet Chem 2007. [DOI: 10.1016/j.jorganchem.2006.12.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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32
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Nath M, Sulaxna. Potentiometric and multinuclear NMR investigations of di-/trimethyltin(iv) cations with some heterocyclic thiones in aqueous media. NEW J CHEM 2007. [DOI: 10.1039/b613730j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Gharib F, Farzad E, Amini MM. Interaction of dimethyltin(IV)dichloride with 5′-AMP and 5′-GMP. CAN J CHEM 2006. [DOI: 10.1139/v06-152] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The formation constants of the species formed in the systems H+ + dimethyltin(IV) + 5′-AMP and 5′-GMP, H+ + 5′-AMP, and H+ + 5′-GMP have been determined in aqueous solution in the pH range of 1.5–9 at constant temperature (25 °C) and constant ionic strength (0.1 mol dm–3, NaClO4) using spectrophotometric and potentiometric techniques. 1H and 31P NMR investigations in aqueous solution confirmed the species formation and led us to propose their structures. The precipitated complexes of AMP and GMP by Me2Sn(IV)2+ at low pH values were characterized by elemental analysis and FTIR spectroscopy, which ruled out purine moiety (N-1 and N-7) coordination and a bidentated coordination of the phosphate group is concluded in both cases.Key words: dimethyltin(IV)dichloride, guanosine 5′-monophosphate, adenosine 5′-monophosphate, stability and protonation constants.
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Abstract
Metal binding affinity and selectivity of peptides are reviewed with a special emphasis on the high structural variety of peptide complexes. The most common structural type of these complexes is built up by the deprotonation and metal ion coordination of subsequent amide groups in the form of fused five-membered chelate rings. The metal ion selectivity of this process and the role of various anchoring groups are discussed in detail. The highest metal binding affinity of peptides is connected to the presence of two anchoring groups in appropriate location (the "double anchor"): e.g. the NH2-Xaa-Xaa-His/Cys/Asp/Met-Xaa sequence. Among the side chain donor functions, the imidazole of histidyl and thiolate of cysteinyl residues are the most effective ligating groups and their involvement in metal binding results in a great variety of different macrochelate or loop structures and/or formation of various polynuclear complexes. Examples of these structural motifs and their possible applications have been thoroughly discussed.
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Affiliation(s)
- Imre Sóvágó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010, Debrecen, Hungary
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35
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Synthesis, characterization, cytotoxic activity and crystal structures of tri- and di-organotin(IV) complexes constructed from the β-{[(E)-1-(2-hydroxyaryl)alkylidene]amino}propionate and β-{[(2Z)-(3-hydroxy-1-methyl-2-butenylidene)]amino}propionate skeletons. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2005.10.057] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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36
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Cardiano P, Giuffrè O, Pellerito L, Pettignano A, Sammartano S, Scopelliti M. Thermodynamic and spectroscopic study of the binding of dimethyltin(IV) by citrate at 25 °C. Appl Organomet Chem 2006. [DOI: 10.1002/aoc.1076] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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37
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Additivity Factors in the Binding of the Diethyltin(IV) Cation by Ligands Containing Amino and Carboxylic Groups at Different Ionic Strengths. J SOLUTION CHEM 2005. [DOI: 10.1007/s10953-005-6196-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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A spectroscopic investigation of the complexing ability of catecholate or salicylate derivatives towards aluminium(III). Polyhedron 2004. [DOI: 10.1016/j.poly.2004.07.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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39
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Ma C, Zhang J, Zhang R. Syntheses and characterizations of diorganotin(IV) complexes withL-cysteine: Crystal structure of [(CH3)2Sn(L-C3H5NO2S)· H2O]. HETEROATOM CHEMISTRY 2004. [DOI: 10.1002/hc.10218] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Kurdziel K, Głowiak T, Materazzi S, Jezierska J. Crystal structure and physico-chemical properties of cobalt(II) and manganese(II) complexes with imidazole-4-acetate anion. Polyhedron 2003. [DOI: 10.1016/j.poly.2003.07.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Cael V, Champmartin D, Rubini P. Interactions of aluminium(III) with glycerolphosphates and glycerophosphorylcholine. J Inorg Biochem 2003; 97:97-103. [PMID: 14507465 DOI: 10.1016/s0162-0134(03)00155-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The complexation of aluminium(III) with glycerol-1-phosphate (G1P) and glycerol-2-phosphate (G2P) in aqueous solutions has been studied as a function of pH, by pH-potentiometry, 31P NMR spectroscopy and ESI mass spectrometry. Various mononuclear complexes (MLH(2)(3+), MLH(2+), ML(+), ML(2)H, ML(2)(-)) and polynuclear species (M(3)L(3)H(-1)(2+), M(3)L(2)H(-n)((n-5)-) with n=5, 6, 7, M(2)L(2)H(-1)(+) ) are formed in the system where the full protonated ligands are noted LH(2). NMR experiments clearly show that G1P and G2P already interact with Al(III) at pH 1. The potentiometric results are confirmed by ESI measurements and 31P NMR studies. No metal ion-induced deprotonation and coordination of the alcoholic-OH functions seem to occur during the complexation. The situation is very different for the glycerophosphorylcholine ligand (GPC identical with LH). Only the complex ML(3+) is formed in aqueous solution with a relatively low formation constant (K=5 at 37 degrees C). This species is clearly identified in 31P and 27Al NMR spectra. The complexation study as a function of the temperature allowed us to determine the thermodynamic parameters of the complex formation. The complexation is not governed by the reaction enthalpy that is found to be positive but by the entropy that is largely positive.
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Affiliation(s)
- V Cael
- Laboratoire de Chimie Physique Organique et Colloi;dale, Université Henri Poincaré-Nancy I, Unité Mixte CNRS-UHP (SRSMC, UMR 7565) BP 239, 54506 Vandoeuvre-Lès-Nancy Cédex, France
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42
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Gajda-Schrantz K, Jancsó A, Pettinari C, Gajda T. Thiolate anchor in organotin(iv) induced amide deprotonation: equilibrium and NMR spectroscopic studies on dimethyltin(iv) complexes formed with N-(2-mercaptopropionyl)glycine andl-alanyl-glycine. Dalton Trans 2003. [DOI: 10.1039/b303905f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Giroux S, Aury S, Henry B, Rubini P. Complexation of Lanthanide(III) Ions with Polyhydroxy Carboxylic Acids in Aqueous Solutions. Eur J Inorg Chem 2002. [DOI: 10.1002/1099-0682(200205)2002:5<1162::aid-ejic1162>3.0.co;2-o] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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Gajda-Schrantz K, Nagy L, Fiore T, Pellerito L, Gajda T. Equilibrium and spectroscopic studies of diethyltin(iv) complexes formed with hydroxymono- and di-carboxylic acids and their thioanalogues. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b105263m] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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46
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Champmartin D, Rubini P, Lakatos A, Kiss T. Complexes of aluminium(III) with glucose-6-phosphate in aqueous solutions. J Inorg Biochem 2001; 84:13-21. [PMID: 11330472 DOI: 10.1016/s0162-0134(00)00217-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The interaction of aluminium(III) with glucose-6-phosphate (GP: LH2) in aqueous solutions has been studied from pH 1 to pH 8, by pH-potentiometry and multinuclear (31P, 27Al, 13C) NMR spectroscopy. Various mononuclear species (MLH2, MLH, ML, ML2H, ML2 and MLH(-3)) and dinuclear complexes M2L2H-n (n=1-4) are formed in the system. NMR clearly indicates that GP is already bound to Al(III) at pH 1. The potentiometric speciation results are confirmed and completed by spectroscopic experiments. Many peaks are observed in the 31P NMR spectra suggesting the formation of isomeric species. An attempt to assign the signals to the corresponding complexes is made, allowing a discussion about their structure. Interestingly enough no metal ion-induced deprotonation and coordination of the alcoholic-OH functions have been observed.
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Affiliation(s)
- D Champmartin
- Laboratoire de Chimie Physique Organique et Colloïdale, Université Henri Poincaré-Nancy I, Unité Mixte CNRS-UHP (SRSMC, UMR no. 7565), Vandoeuvre-les-Nancy, France
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47
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Jancsó A, Gajda T, Szorcsik A, Kiss T, Henry B, Vankó G, Rubini P. Potentiometric and spectroscopic studies on the dimethyltin(IV) complexes of 2-hydroxyhippuric acid. J Inorg Biochem 2001; 83:187-92. [PMID: 11237258 DOI: 10.1016/s0162-0134(00)00179-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Equilibrium and spectroscopic (1H, 13C NMR and 119Sn Mössbauer) studies in aqueous solution are reported for dimethyltin(IV) complexes of 2-hydroxyhippuric acid (Sal-Gly). Below pH 4, oxygen-coordinated complexes MLH and ML are formed. In the pH range 5-8.5, the species MLH(-1), predominates at any metal-to-ligand ratio. The ligand exchange of this species is slow on the NMR time scale, which allows its structural characterization by NMR spectroscopy: the coordination polyhedron around the tin atom is distorted trigonal bipyramidal, with tridentate [O-,N-,COO-] coordination of Sal-Gly, involving two equatorial methyl groups. The NMR results reveal that the main cause of the distortion of the polyhedron is the large CH3-Sn-CH3 angle of 136+/-4 degrees. The presented results supplement the data available on the dimethyltin(IV)-promoted amide deprotonation of peptides, and provide further arguments for the fundamental role of the carboxylate as an anchoring group in this process.
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Affiliation(s)
- A Jancsó
- Department of Inorganic and Analytical Chemistry, University of Szeged, Hungary
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Girasolo MA, Pizzino T, Mansueto C, Valle G, Stocco GC. Spectroscopic characterization and biological activity ofL-methionyl-L histidinato complexes of R2Sn(IV) ions (R?=?Me, nBu, Ph) and X-ray structure of Me2SnMetHis ? 0.5MeOH. Appl Organomet Chem 2000. [DOI: 10.1002/(sici)1099-0739(200004)14:4<197::aid-aoc976>3.0.co;2-h] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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