scholarly journals Preparation, Characterization and Evaluation of Extraction Effeciency of N-p-tolyl-N benzohydroxamic Acid towards Certain Metal Ions

2021 ◽  
pp. 30-39
Author(s):  
Nuha Y. Elamin ◽  
Elmugdad Ahmed Ali
Keyword(s):  
Melting Point ◽  
Organic Solvent ◽  
Metal Ions ◽  
Hydroxamic Acid ◽  
Benzoyl Chloride ◽  
Hydroxamic Acids ◽  
Partial Reduction ◽  
Benzohydroxamic Acid ◽  
Ph Values ◽  
Maximum Extraction

The hydroxamic acid was prepared by the partial reduction of p- nitro toluene to give N-p-tolyl hydroxyl amine which was coupled with benzoyl chloride to give N-p-tolyl-N-benzohydroxamic acid.The hydroxamic acid prepared was identified by their characteristic colored reaction with vanadium (V) and iron (lll), melting point, I.R.  spectra, 1H NMR and mass spectrometry.The extractive properties of hydroxamic acids towards the metal ions like Fe (lll), Cu (ll), Ni (ll) and Co (ll) were examined using appropriate organic solvent. N-p- tolyl -N-benzohydroxamic acid was found to have a maximum extraction for Fe (lll) 75.10% at pH 5.0, Cu (ll) 99.81% at pH 5.0, Ni (ll) 59.45% at pH 7.0 and Co (ll) 99.40% at pH 10.0.The  hydroxamic acid was found to extract efficiently metals like Ni (ll) in neutral pH values, Fe (lll), Cu (ll), in pH near to neutral and Co (ll) at alkali pH values.

Nonenzymatic Catalysis by Metal Ions and Phosphoric Acid Esters of Hydroxamic Acid Formation

1980 ◽  
Vol 35 (6) ◽  
pp. 727-730
Author(s):  
Oemer Saygin ◽  
Peter Decker
Keyword(s):  
Amino Acids ◽  
Phosphoric Acid ◽  
Metal Ions ◽  
Inorganic Phosphate ◽  
Hydroxamic Acid ◽  
Hydroxamic Acids ◽  
Bivalent Ions ◽  
No Release ◽  
Catalytic Effects ◽  
Acid Esters

Abstract Nonenzymatic catalysis by bivalent ions of Be, Mg, Ca, Zn, Mn, Ni and Co and bioorganic phosphates of the formation of hydroxamic acids from acetate or amino acids has been studied systematically. Increased yields of hydroxamate were observed at particular combinations of reactants. The most prominent increase (ca. 15-fold) was found with acetate and Ni++, and with a combination of ATP and Be++. Among others especially ribose-5-phosphate and glucose-5-phosphate enhanced yields in the presence of most metal ions. Since no release of inorganic phosphate was observed, this effect cannot be interpreted as an evidence for intermediate transhosphorylation reactions; it may also result from simple catalytic effects of metal sugar complexes.

scholarly journals Trends and Exceptions in the Interaction of Hydroxamic Acid Derivatives of Common Di- and Tripeptides with Some 3d and 4d Metal Ions in Aqueous Solution

Molecules ◽  
2019 ◽  
Vol 24 (21) ◽  
pp. 3941 ◽  
Author(s):  
Ozsváth ◽  
Bíró ◽  
Nagy ◽  
Buglyó ◽  
Sanna ◽  
...  
Keyword(s):  
Metal Ions ◽  
Hydroxamic Acid ◽  
Hydroxamic Acids ◽  
17O Nmr ◽  
Equilibrium Study ◽  
Sandwich Type ◽  
Uv Visible ◽  
First Time ◽  
Derivatives Of ◽  
Half Sandwich

By using various techniques (pH-potentiometry, UV-Visible spectrophotometry, 1H and 17O-NMR, EPR, ESI-MS), first time in the literature, solution equilibrium study has been performed on complexes of dipeptide and tripeptide hydroxamic acids—AlaAlaNHOH, AlaAlaN(Me)OH, AlaGlyGlyNHOH, and AlaGlyGlyN(Me)OH—with 4d metals: the essential Mo(VI) and two half-sandwich type cations, [(η6-p-cym)Ru(H2O)3]2+ as well as [(η5-Cp*)Rh(H2O)3]2+, the latter two having potential importance in cancer therapy. The tripeptide derivatives have also been studied with some biologically important 3d metals, such as Fe(III), Ni(II), Cu(II), and Zn(II), in order to compare these new results with the corresponding previously obtained ones on dipeptide hydroxamic acids. Based on the outcomes, the effects of the type of metal ions, the coordination number, the number and types of donor atoms, and their relative positions to each other on the complexation have been evaluated in the present work. We hope that these collected results might be used when a new peptide-based hydroxamic acid molecule is planned with some purpose, e.g. to develop a potential metalloenzyme inhibitor.

scholarly journals A general concept for the introduction of hydroxamic acids into polymers

2019 ◽  
Vol 10 (29) ◽  
pp. 7009-7022 ◽  
Author(s):  
Tobias Johann ◽  
Jennifer Keth ◽  
Matthias Bros ◽  
Holger Frey
Keyword(s):  
Metal Oxide ◽  
Metal Ions ◽  
Hydroxamic Acid ◽  
Hydroxamic Acids ◽  
General Concept ◽  
Oxide Surfaces ◽  
Metal Oxide Surfaces

Polyethers (PEG) with hydroxamic acid groups enable chelation of a variety of metal ions, coating of metal oxide surfaces and stabilization of nanoparticles. In contrast to catechol, hydroxamic acids are oxidation stable and biocompatible.

scholarly journals Hydrolysis of Hydroxamic Acid Complexants in the Presence of Non-Oxidizing Metal Ions

2012 ◽  
Vol 1383 ◽  
Author(s):  
Scott Edwards ◽  
Fabrice Andrieux ◽  
Colin Boxall ◽  
Robin Taylor ◽  
David Woodhead
Keyword(s):  
Metal Ions ◽  
Organic Compounds ◽  
Rate Constants ◽  
Hydroxamic Acid ◽  
Hydroxamic Acids ◽  
Acid System ◽  
Nuclear Fuel Reprocessing ◽  
System 1 ◽  
Hydrolysis Of ◽  
Fuel Reprocessing

ABSTRACTSimple Hydroxamic acids (XHAs) are salt free, organic compounds with affinities for hard cations such as Fe3+, Np4+, Pu4+ and have been identified as suitable reagents for the control of Pu and Np in advanced nuclear fuel reprocessing. Building upon previous work on the neptunium(IV)-formohydroxamic(FHA) acid system [1], a model that describes the hydrolysis of the acetohydroxamate moiety has been extended to include hydrolysis of bishydroxamatoneptunium(IV) complex. The model has been used to determine the rate constants for hydrolysis of mono- and bis-acetohydroxamatoneptunium(IV) at 25 °C, which were found to be 1.0×10-5 dm3 mol-1 s-1 and 5.0×10-5 dm3 mol-1 s-1, respectively.

Study on desorption of Mn, Fe, and Mg from TMP and evaluation of the complexing strength of different chelating agents using side reaction coefficients 10th EWLP, Stockholm, Sweden, August 25–28, 2008

Holzforschung ◽  
2009 ◽  
Vol 63 (6) ◽  
Author(s):  
Kim Granholm ◽  
Pingping Su ◽  
Leo Harju ◽  
Ari Ivaska
Keyword(s):  
Citric Acid ◽  
Metal Ions ◽  
Chelating Agents ◽  
Side Reaction ◽  
Sodium Dithionite ◽  
Thermomechanical Pulp ◽  
Peroxide Bleaching ◽  
Ph Values ◽  
Reducing Environment ◽  
Ph Range

Abstract Chelation of thermomechanical pulp (TMP) was studied in this work. The desorption of Mn, Fe, and Mg due to their impact on peroxide bleaching was investigated. The desorption experiments were performed with EDTA, citric acid, oxalic acid, and formic acid as chelating agents at different pH. Chelation experiments with EDTA were carried out at pH 3–11. Sodium dithionite was used as the reducing agent in studying chelation with EDTA in a reducing environment. Mn was very effectively desorbed with EDTA from TMP at pH <10 and the reducing environment further improved the removal of all the studied metal ions from TMP with EDTA. Citric acid also removed Mn effectively from TMP at pH 5. The thermodynamic stability constants of different metal chelates do not present the correct picture of how strongly the metal ions are bound by the chelating agents in different conditions. But by means of the side reaction coefficients (α M(L)-coefficients) it is also theoretically possible to evaluate and compare the real binding strengths between the metal ions and different chelating agents at varying pH values and other solution conditions. In this study, a theory is given for the calculation of side reaction coefficients. Values of the α M(L)-coefficients, for the pH range 0–14, are presented for EDTA, DTPA, and also for some other new potential environmentally friendly chelating agents.

1, 1'-Ferrocenedicarboxylic acid/tetrahydrofuran induced precipitation of calcium carbonate with multi-level structure in water

CrystEngComm ◽  
2021 ◽  
Author(s):  
Lihong Zhou ◽  
Guanghui Wang ◽  
Jie Du ◽  
Qinjiang Zhao ◽  
Xiang Pei
Keyword(s):  
Organic Chemistry ◽  
Calcium Carbonate ◽  
Organic Solvent ◽  
Metal Ions ◽  
Level Structure ◽  
Multi Level

The system of organic solvent and ligand had been successfully applied to regulate the coordination of metal ions in organic chemistry. Inspired by previous works, we had conducted the study...

scholarly journals Comparative Extraction of Aluminum Group Metals Using Acetic Acid Derivatives with Three Different-Sized Frameworks for Coordination

Separations ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 211
Author(s):  
Keisuke Ohto ◽  
Nako Fuchiwaki ◽  
Hiroaki Furugou ◽  
Shintaro Morisada ◽  
Hidetaka Kawakita ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Metal Ions ◽  
Spectroscopic Data ◽  
Equilibrium Constants ◽  
Structural Effects ◽  
Extraction Equilibrium ◽  
Ph Values ◽  
Slope Analysis ◽  
Coordination Sites ◽  
Extraction Properties

We prepared acetic acid derivatives using three different frameworks, calix[4]arene, alkenyltrimethylol, and trihydroxytriphenylmethane, which differ in the number and size of their coordination sites. We further investigated the extraction properties for aluminum group metal ions. All three extraction reagents exhibited increased extraction compared with the corresponding monomeric compounds, owing to structural effects. The extraction reaction and extraction equilibrium constants were determined using a slope analysis. Their extraction abilities, separation efficiencies, and potential coordination modes are discussed using the extraction equilibrium constants, half-pH values, and spectroscopic data. The calix[4]arene and trihydroxytriphenylmethane derivatives demonstrated allosteric co-extraction of indium ions (In3+) with an unexpected stoichiometry of 1:2.

Stability and Complexation of Cyanidin-3-Giucoside and Raspberry Juice Extract in the Presence of Selected Cations

1981 ◽  
Vol 44 (7) ◽  
pp. 516-523 ◽  
Author(s):  
D. G. COFFEY ◽  
F. M. CLYDESDALE ◽  
F. J. FRANCIS ◽  
R. A. DAMON
Keyword(s):  
Complex Formation ◽  
Metal Ions ◽  
Ph Values ◽  
Hue Angle ◽  
The Stability ◽  
Similar Complex

The stability and color of purified cyanidin-3-glucoside and raspberry juice extract in the presence of selected metal ions was investigated. Production of metal-anthocyanin complexes was suggested by changes in color of the samples as shown by L, a, and hue angle values. Complex formation was indicated by HPLC in raspberry juice samples treated with Sn++ but not in samples of purified cyanidin-3-glucoside. According to the colorimetric values, complex formation occurs with cyanidin-3-glucoside and A1+++ at pH 2.0 and 3.0 and with Sn++ at pH 4.0 and 3.0. Similar complex formation occurs with these metals and raspberry juice extract at the same respective pH values.

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