Study about the Composition and Stability Constant of Sulfosalicylic Acid-Copper(II) Complex by Mole Ratio Method

Cefotaxime, a β-lactam antibiotic, has a structure which enables it to act as a chelating agent. The formation of Fe(III) complex with cefotaxime has been studied colorimetrically at an absorption maximum of 480 nm at different temperatures. The data showed that Fe(III) and cefotaxime combine in the molar ratio of 1:1 at pH 7.4 with ionic strength maintained using 0.1M KNO3. The stability constants of the complex were calculated to be 1.56 - 1.90 x 104 by continuous variation method and 1.34 - 1.71 x 104 by mole ratio method at 25 and 40 oC respectively. ∆HƟ values for the complex were calculated to be -1.02 x 104 and -1.05 x 104 J by continuous variation method and mole ratio method respectively. ∆GƟ of the complex were calculated to be -2.44 – (-2.51) x 104 J by continuous variation method and -2.41- (- 2.48) x 104 J by mole ratio method at 25 and 40 oC. ∆SƟ of the complex were calculated to be 2.44 - 2.51 x 104 J/K by continuous variation method and -2.41 -2.48) x 104 J/K by mole ratio method at 25 and 40 oC respectively. Cefotaxime is a good chelating agent and can be an efficient antidote in the therapy of copper overload or poisoning.

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Die Isopolymolybdationen in wäßrigen Medien im Bereich Z ≦ 1,14 / Concerning Isopolymolybdate Ions in Aqueous Media in the Range Z ≦ 1.14

Zeitschrift für Naturforschung B ◽

10.1515/znb-1980-0112 ◽

1980 ◽

Vol 35 (1) ◽

pp. 45-56 ◽

Cited By ~ 11

Author(s):

Karl-Heinz Tytko ◽

Georgios Petridis ◽

Bernd Schönfeld

Keyword(s):

Main Product ◽

Structural Parameters ◽

Aqueous Media ◽

Ratio Method ◽

Intensity Difference ◽

Ionic Medium ◽

Theoretical Investigations ◽

Detailed Evaluation ◽

Mole Ratio Method ◽

Statistical Certainty

The system H+/MoO42- was investigated by Raman spectroscopy in the range Z = 0 to 1.14 at initial concentrations CMoO₄ 2- = 0.02 to 2M and concentrations of the ionic medium CMe+ = 2CMoO₄ 2- to 3M Me(Cl,NO3) (Me=Li, Na, K,NH4 , Mg/2). The mole-ratio method and intensity difference diagrams do not indicate any species between MoO42- and Mo7O246- contrary to propositions in recent papers. A detailed evaluation of the extensive data shows the possible portion of such species to be < 3 % , this value having a statistical certainty of 95%. Comparing the solutions having Z = 1.1 by fingerprint procedures, in all cases Mo7O246- is the first main product (detectable by static methods) irrespective of the nature and concentration of the ionic medium. Thus, Mg2+ ions do not influence the course of aggregation of molybdate ions as has been proposed in the literature. This is in accordance with theoretical investigations since the Mo7O246- ion has the distinction of a number of favourable structural parameters in the system that become operative in case of scarcity of H+ ions.

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Study of iron(II) complexes with halides and thiocyanate in acetonitrile

Canadian Journal of Chemistry ◽

10.1139/v70-232 ◽

1970 ◽

Vol 48 (9) ◽

pp. 1414-1419 ◽

Cited By ~ 6

Author(s):

Byron Kratochvil ◽

Robert Long

Keyword(s):

Formation Constants ◽

Ratio Method ◽

Mole Ratio Method ◽

Stepwise Formation

In acetonitrile, iron(II) forms stable 1:1 complexes with chloride, bromide, and iodide and both 1:1 and 1:2 complexes with thiocyanate. Stepwise formation constants for the complexes were determined spectrophotometrically by a mole-ratio method. The log K values are: FeCl+, 5.8; FeBr+, 5.5; FeI+,4.3; Fe(SCN)+, 5.5; and Fe(SCN)2, 3.7.

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DEVELOPMENT OF EXTRACTIVE SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF IRON (III) WITH SCHIFF BASE 2-[(2-HYDROXYPHENYLIMINO) METHYL]-4-NITROPHENOL

International Journal of Current Pharmaceutical Research ◽

10.22159/ijcpr.2016v8i4.15924 ◽

2016 ◽

Vol 8 (4) ◽

pp. 89 ◽

Cited By ~ 1

Author(s):

Datta B. Mandhare ◽

Vasant D. Barhate

Keyword(s):

Aqueous Solution ◽

Schiff Base ◽

Spectrophotometric Method ◽

Molar Absorptivity ◽

Maximum Absorption ◽

Ratio Method ◽

Pharmaceutical Samples ◽

Mole Ratio Method ◽

Ph Range

Objective: A simple spectrophotometric method has been developed for the determination of Iron (III) by using Schiff base 2-[(2-hydroxyphenylimino) methyl]-4-nitrophenol [HPIMNP].Methods: HPIMNP extracts Fe (III) quantitatively (99.95%) into chloroform from an aqueous solution of pH range 4.0-6.0.Results: The chloroform extracts show maximum absorption at 510 nm (λ max). Beer’s Law is obeyed over the Fe (III) concentration range of 0.5 to 20.0 µg/ml. The Molar absorptivity and Sandell’s sensitivity for Fe–HPIMNP system is 5000 L mol ˉ1 cmˉ1 and 0.011 µg cmˉ2respectively. The composition of extracted species is found to be 1: 3 [Fe-HPIMNP] by Job’s continuous variation and Mole-ratio method. Interference by various ions has been studied.Conclusion: The proposed method is rapid, sensitive, reproducible and accurate and it has been satisfactory applied for the determination of Iron in Pharmaceutical Samples.

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Magnetophoretic Mole-Ratio Method

Analytical Chemistry ◽

10.1021/acs.analchem.7b00999 ◽

2017 ◽

Vol 89 (19) ◽

pp. 10141-10146 ◽

Cited By ~ 1

Author(s):

Hitoshi Watarai ◽

Jiayue Chen

Keyword(s):

Ratio Method ◽

Mole Ratio Method

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Spectrophotometric Measurement Of The Stoichiometry Of Formaldehyde And Plasma Albumin Reaction In Water Solution Using The Method Of Continous Variation (Job’s Method ) And The Mole Ratio Method

IOSR Journal of Environmental Science Toxicology and Food Technology ◽

10.9790/2402-0564245 ◽

2013 ◽

Vol 5 (6) ◽

pp. 42-45

Author(s):

Keyword(s):

Water Solution ◽

Ratio Method ◽

Spectrophotometric Measurement ◽

Plasma Albumin ◽

Mole Ratio Method ◽

Job's Method ◽

Reaction In Water

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SYNTHESIS OF SPINEL Mn3O4 AND SPINEL Mn3O4/ZrO2 NANOCOMPOSITES AND USING THEM IN PHOTO-CATALYTIC DECOLORIZATION OF Fe(II)-( 4,5- DIAZAFLUOREN-9-ONE 11) COMPLEX

Periódico Tchê Química ◽

10.52571/ptq.v17.n34.2020.713_p34_pgs_689_699.pdf ◽

2020 ◽

Vol 17 (34) ◽

pp. 689-699

Author(s):

Mohammed Kareem HAYAWI ◽

Mohanad Mousa KAREEM ◽

Luma Majeed AHMED

Keyword(s):

Model Material ◽

Spherical Particles ◽

Ratio Method ◽

Nano Composites ◽

Precipitation Process ◽

X Ray Diffraction ◽

Force Microscopy ◽

Atomic Force ◽

Mole Ratio Method ◽

Co Precipitation

The spinel structure Mn3O4 and the spinel Mn3O4/ZrO2 nano-composites particles were synthesized successfully as photocatalysts by employing the co-precipitation process and ultrasonic technique, respectively. The morphology of the top mention prepared photocatalysts was distinguished using X-ray diffraction (XRD) technology and atomic force microscopy (AFM) and indicated that the mean crystal sizes and particle sizes for all studied samples were nanometric. In addition, the optical properties of the obtained photocatalysts were investigated using a UV-Visible spectrophotometer with Labsphere diffuse reflectance accessory to measure the bandgaps of them. Based on the Tauc equation, the bandgaps (Bg) for the studied photocatalysts were determined. The bandgaps are indirect for all samples, and it is increased in values for the nanocomposites with the increasing the ratio of ZrO2. So, the sequence of bandgaps values is: Bg spinel Mn3O4 Bg Comp.1 Bg Comp.2 Bg Comp.3 Bg ZrO2, and equal to 2.21 eV 3.15 eV 4.51 eV 4.26 eV 5.29 eV. The research revealed that the spinel Mn3O4 and the spinel Mn3O4 ZrO2 nano-composites particles were quasispherical and spherical particles respectively. Moreover, the incorporation of spinel Mn3O4 particle with ZrO2 particle was successfully carried out that was proved by XRD and AFM analyses. This work discovered that the photocatalytic reaction response via employing Fe(II)-(4,5-Diazafluoren-9-one 11) complex as model material under UV-A lamp with the use of the studied photocatalysts. The primary photo experiments for these photocatalysts found that the decolorization of Fe(II)-(4,5-Diazafluoren-9-one 11) complex is not active without addition of H2O2, that attitude is due to the very high stability of these complex with having an octahedral structure, which was proved with using mole ratio method. Whereas, after the addition of H2O2 to the aqueous solution of these complex, the activity with using the spinel Mn3O4 ZrO2 nanocomposite 3 was found to be the double active than that using the spinel Mn3O4 alone, and the sequence of phootdecolorization efficiency (E%) is being: E% composite 3 E% composite 2 E% composite 1 E% spinel Mn3O4.

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Nano Synthesis and Characterization of Complex Derived from Silver Metal Conjugated with Midodrine Hydrochloride

Oriental Journal Of Chemistry ◽

10.13005/ojc/370121 ◽

2021 ◽

Vol 37 (1) ◽

pp. 157-161

Author(s):

Namita Bharadwaj ◽

Jaishri Kaushik

Keyword(s):

Stability Constant ◽

Silver Nanoparticle ◽

Metal Ion ◽

Ratio Method ◽

Synthesis And Characterization ◽

Face Centered Cubic ◽

Uv Visible ◽

Face Centered ◽

The Stability

The stability constant Kf for the complexation of Ag(Ⅰ) metal ion with Midodrine hydrochloride were determinedby spectrophotometric method at room temperature .The colored complexes were measured at 300 nm. The stability constant of the complexes were found to be 5.47 by mole ratio method. The stoichiometry of the complexes formed between the Midodrine drug and Ag (Ⅰ) metal ion are 1:1 M/L ratio. Silver conjugated Midodrine hydrochloride Nano synthesized and characterized by UV/Visible spectroscopy, SEM, XRD and FT-IR. The UV/Visible spectra of Midodrine –Ag nanoparticle in the range of 322 nm. XRD conformThe crystallite size of Midodrine - Ag (Ⅰ) nanoparticles are found to be 64.5 nmfrom Debye Scherer formula.Thecrystallinity of nanoparticles is Face centered cubic structure. SEM conform of particle size and surface morphology, FTIR analyzed involvement of -NH2 group in Midodrine is the stabilized of silver nanoparticle. This research is focuses on complexation, Nano synthesis and characterization of Drug-silver nanoparticle for antihypotention therapy.

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