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Journal articles on the topic 'Stability constants of metalligand complexes'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

S., B. Kanungo. "A compilation and critical evaluation of the literature data on thermal dehydration of hydrated salts." Journal of Indian Chemical Society Vol. 86, Jul 2009 (2009): 679–89. https://doi.org/10.5281/zenodo.5814105.

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Institute of Minerals and Materials Technology (Formerly R.R.L.), Bhubaneswar-751 013, Orissa, India <em>E-mail </em>: sbk_your@yahoo.co.in <em>Manuscript received 7 January 2008, revised 16 March 2009, accepted 17 March 2009</em> The article provides a detailed compilation of literature data on the thermal dehydration of simple (formed from single cation and anion) hydrated salts consisting of a wide variety of cations and anions or ligands. An attempt has been made to correlate the temperature and apparent activation energy of dehydration with either charge density (z/r) of cation or stabili

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2

El-Komy, Mahmoud. "Stability Constants of Polymeric Complexes.(Dept.P)." MEJ. Mansoura Engineering Journal 26, no. 2 (2021): 1–11. http://dx.doi.org/10.21608/bfemu.2021.145047.

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3

Chudinova, N. N., E. N. Beresnev, V. P. Grigor’ev, A. V. Sereda, and M. A. Kop’eva. "Stability constants of ytterbium cyclohexaphosphate complexes." Russian Journal of Inorganic Chemistry 52, no. 4 (2007): 630–34. http://dx.doi.org/10.1134/s0036023607040286.

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4

Mamedova, S. Sh, S. R. Gadzhieva, and T. G. Khanlarov. "Stability constants of polymer-metal complexes." Russian Journal of Inorganic Chemistry 53, no. 12 (2008): 1964–66. http://dx.doi.org/10.1134/s0036023608120206.

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5

Lee, Janice S., and Jerome O. Nriagu. "Stability constants for metal arsenates." Environmental Chemistry 4, no. 2 (2007): 123. http://dx.doi.org/10.1071/en06070.

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Environmental context. The behaviour of arsenic compounds is controlled by their solubility, which in turn controls both the forms and mobility of arsenic in the environment. Current knowledge on arsenic chemistry may be distorted because information available on the solubility of arsenic compounds usually does not include possible formation of metal–arsenate complexes. Our results show the formation of stable metal–arsenate complexes that have not been considered before, and this new data can be used to further examine the effect of these complexes on controlling the fate and transport of ars

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6

Ergashova, Sh I., D. M. Ismatov, and N. K. Mukhamadiev. "SYNTHESIS OF COMPLEX COMPOUNDS OF IONS OF SOME d-ELEMENTS WITH QUERCETIN AND RUTIN AND ASSESSMENT OF THEIR STABILITY CONSTANTS." 2022-yil 3-son (133/1) ANIQ FANLAR SERIYASI 1, no. 1 (2025): 64–68. https://doi.org/10.59251/2181-1296.2025.v1.149.1.3177.

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In this work, the synthesis of iron ( Fe(II)), cobalt (Co(II)) and zinc (Zn(II)) ion complexes with flavonoids quercetin and rutin was studied and their stability constants at different pH values were estimated. The synthesis of the complexes was carried out under spectrophotometric control , and the stability constants were determined by the isomolar series method. The results showed that the stability of the complexes depends on the acidity of the medium, with the highest values of the stability constants being recorded for quercetin complexes with Fe(II) at neutral pH. The data obtained ind

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7

STEVENSON, F. J., ALANAH FITCH, and M. S. BRAR. "STABILITY CONSTANTS OF CU(II)-HUMATE COMPLEXES." Soil Science 155, no. 2 (1993): 77–91. http://dx.doi.org/10.1097/00010694-199302000-00001.

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8

Verchere, J. F., and M. Hlaibi. "Stability constants of borate complexes of oligosaccharides." Polyhedron 6, no. 6 (1987): 1415–20. http://dx.doi.org/10.1016/s0277-5387(00)80903-1.

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9

Fernández-Ramírez, Edelmira, Melania Jiménez-Reyes, and Marcos J. Solache-Ríos. "Stability Constants of Chloride Complexes of Lanthanum." Journal of Chemical & Engineering Data 52, no. 2 (2007): 373–76. http://dx.doi.org/10.1021/je060290k.

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10

El-Bindary, Ashraf A., Adel Z. El-Sonbati, and Hanan M. Kera. "Thermodynamics of substituted pyrazolone. V: Potentiometric and conductometric studies of complexes of some transition metals with 4-(4-acetophenyl)hydrazono-3-methyl-2-pyrazolin-5-one." Canadian Journal of Chemistry 77, no. 7 (1999): 1305–9. http://dx.doi.org/10.1139/v99-122.

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Proton-ligand dissociation constants of 4-(4-acetophenyl)hydrazono-3-methyl-2-pyrazolin-5-one (AHMP) and metal-ligand stability constants of its complexes with some transition metal ions were calculated potentiometrically in 0.1 M KCl and 50% (v/v) ethanol-water mixture. The order of stability constants was found to be Th4+ > UO22+ > Ce3+ > La3+ > Mn2+ < Co2+ < Ni2+ < Cu2+ > Zn2+. The dissociation constant, pK1H, of AHMP and the stability constants, log K, of their complexes were determined at different temperatures (298, 308, and 318 K). The corresponding thermodynamic

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11

Zabiszak, Michal, Martyna Nowak, Zbigniew Hnatejko, et al. "Thermodynamic and Spectroscopic Studies of the Complexes Formed in Tartaric Acid and Lanthanide(III) Ions Binary Systems." Molecules 25, no. 5 (2020): 1121. http://dx.doi.org/10.3390/molecules25051121.

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Binary complexes of tartaric acid with lanthanide(III) ions were investigated. The studies have been performed in aqueous solution using the potentiometric method with computer analysis of the data for detection of the complexes set, determination of the stability constants of these compounds. The mode of the coordination of complexes found was determined using spectroscopy, which shows: Infrared, circular dichroism, ultraviolet, visible as well as luminescence spectroscopy. The overall stability constants of the complexes as well as the equilibrium constants of the reaction were determined. A

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12

Kostic, Ivana, Tatjana Andjelkovic, Ruzica Nikolic, et al. "Copper(II) and lead(II) complexation by humic acid and humic-like ligands." Journal of the Serbian Chemical Society 76, no. 9 (2011): 1325–36. http://dx.doi.org/10.2298/jsc110310115k.

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The stability of metal-humate complexes is an important factor determining and predicting speciation, mobility and bioavailability of heavy metals in the environment. A comparative investigation of the complexation of Cu(II) and Pb(II) with humic acid and humic-like ligands, such as benzoic and salicylic acid, was performed. The analysis was realized at pH 4.0, a temperature of 25?C and at an ionic strength of 0.01 (NaCl) using the Schubert ion-exchange method and its modified form. The stability constants were calculated from the experimental data by the Schubert method for complexes with ben

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13

Fialkovsky, Igor, Denis Lutskiy, Andrey Alekseev, and Alexey Blinov. "Modelling the Effect of Temperature on the Stability of Bromide and Carbonate Complexes of Europium, Gadolinium, Terbium and Determination of their Thermodynamic Functions." Materials Science Forum 1031 (May 2021): 103–8. http://dx.doi.org/10.4028/www.scientific.net/msf.1031.103.

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A method has been developed for calculating the stability constants of inorganic complexes of rare-earth metals at various temperatures, based on analysis of the literature data by obtaining a linear regression equation on the form: . Using this method, the stability constants of bromide LnBr2+ and carbonate LnCO3+ complexes of europium, terbium, and gadolinium in aqueous solutions at temperatures of 50, 75, and 100 ° C were obtained. The obtained values of the coefficients А(T1) and В(T1) of the linear regression equation can be used to calculate the stability constants of complexes of europi

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14

Gérard, Christian, Hanane Chehhal, and Michel Aplincourt. "Stability of Metal Complexes with a Ligand of Biological Interest: Noradrenaline." Journal of Chemical Research 23, no. 2 (1999): 90–91. http://dx.doi.org/10.1177/174751989902300212.

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Stoichiometry, equilibrium constants and spectra of iron(III) complexes with noradrenaline have been determined from spectrophotometric measurements; in addition equilibrium constants of complexes with MgII, CdII and PbII have been determined from potentiometric measurements.

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15

Nleonu, E.C., E.R. Enemo, and T.E. Ezenwa. "Conductometric Study on the Stability Constants and Thermodynamic Parameters of Fe3+ Complexes with some Ligands." Chemistry Research Journal 6, no. 3 (2021): 112–16. https://doi.org/10.5281/zenodo.11665158.

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<strong>Abstract </strong>The stability constants and theymodynamic parameters of Fe<sup>3+</sup> complexes with cyanide, thiocyanide, ethylene diamine tetraacetic acid, methylamine and ethylamine were studied by conductometric method in aqueous medium at different temperatures (302, 308, 313 & 318K). The stability constants and thermodynamic parameters of the metal-ligand complexes were studied at low concentration of the metal and ligand. The results indicated that, the complex formation is spontaneous, exothermic and entropically favourable. The complexes were observed to be stable at l

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16

Imura, Ryota, Hiroyuki Ida, Ichiro Sasaki, Noriko S. Ishioka, and Shigeki Watanabe. "Re-Evaluations of Zr-DFO Complex Coordination Chemistry for the Estimation of Radiochemical Yields and Chelator-to-Antibody Ratios of 89Zr Immune-PET Tracers." Molecules 26, no. 16 (2021): 4977. http://dx.doi.org/10.3390/molecules26164977.

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(1) Background: Deferoxamine B (DFO) is the most widely used chelator for labeling of zirconium-89 (89Zr) to monoclonal antibody (mAb). Despite the remarkable developments of the clinical 89Zr-immuno-PET, chemical species and stability constants of the Zr-DFO complexes remain controversial. The aim of this study was to re-evaluate their stability constants by identifying species of Zr-DFO complexes and demonstrate that the stability constants can estimate radiochemical yield (RCY) and chelator-to-antibody ratio (CAR). (2) Methods: Zr-DFO species were determined by UV and ESI-MS spectroscopy. S

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17

Bay, Mai Van, Nguyen Khoa Hien, Hoang Kim Thanh, Pham Cam Nam, and Duong Tuan Quang. "Prediction of stability constants of Cu2+ complexes with organic fluorescent ligands using thermodynamic cycle in combination with DFT theory and SMD solvent model." Hue University Journal of Science: Natural Science 129, no. 1D (2020): 15–23. http://dx.doi.org/10.26459/hueunijns.v129i1d.5947.

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Accurately predicting the stability constant ( ) of the Cu2+ complex with organic fluorescent ligands provides an important basis to design molecular fluorescent sensors for selective detection of Cu2+. With appropriate reference complexes, the calculated stability constants are in good agreement with experimental values. The values of the predicted stability constants of Cu2+ complexes with Calcein blue (H3Cb) and FluoZin-1 (H2Fz) are 13.33 (exp. 14.27) and 6.59 (exp. 6.01), respectively. More importantly, the results could be applied to the investigation of complexes.

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18

Chen, Yona, Edouard Jurkevitch, Eli Bar-Ness, and Yitzhak Hadar. "Stability Constants of Pseudobactin Complexes with Transition Metals." Soil Science Society of America Journal 58, no. 2 (1994): 390–96. http://dx.doi.org/10.2136/sssaj1994.03615995005800020021x.

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19

Weber, O. A. "STABILITY CONSTANTS OF Cu(II) COMPLEXES OF LANTHIONINE." International Journal of Protein Research 3, no. 1-4 (2009): 255–59. http://dx.doi.org/10.1111/j.1399-3011.1971.tb01718.x.

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20

Texter, John. "Stability constants for aqueous silver/bromide/thiocyanate complexes." Analytica Chimica Acta 215 (1988): 187–201. http://dx.doi.org/10.1016/s0003-2670(00)85277-0.

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21

Fuks, Leon, Yurii M. Kulyako, and Dmitrii A. Malikov. "Stability Constants of Acetylacetonate Complexes of Tetravalent Berkelium." Mendeleev Communications 5, no. 2 (1995): 74–76. http://dx.doi.org/10.1070/mc1995v005n02abeh000466.

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22

Öhman, Lars-Olof. "Experimental determination of stability constants of aqueous complexes." Chemical Geology 151, no. 1-4 (1998): 41–50. http://dx.doi.org/10.1016/s0009-2541(98)00069-2.

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23

Beck, M. T. "Critical survey of stability constants of cyano complexes." Pure and Applied Chemistry 59, no. 12 (1987): 1703–20. http://dx.doi.org/10.1351/pac198759121703.

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24

V., V. RAMANA, YAMUNA K., and SARASWATHI K. "Stability Constants of Metal Complexes of 1,2,4-Triazoles." Journal of Indian Chemical Society Vol. 68, Dec 1991 (1991): 666–67. https://doi.org/10.5281/zenodo.6135029.

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Department of Chemistry. S. V. University, Tirupati-517 502 <em>Manuscript received 21 May 1990, revised 2 December 1991, accepted 6 December 1991</em> The present study reports the stability constants of the metal complexes using bivalent Mn, Fe, Co, Ni, Cu and Zn with 4-amino-3-(methylphenyl)-5- mercapto-1 ,2,4-triazole (1), 4-amino-3-phenyl-5-mercapto-1,2,4-triazole (2), 4-amino-3-(p-cblorophenoxymethyl)-5-mercapto-1,2,4-triazole (3), 4-amino-3· (phenoxymethyl)-5-mercapto-1,2,4-triazole (4).

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25

Vijay, Malhotra, and P. Singh Chandel C. "Voltammetric determination of composition and stability constants of some Ph-amino acids-sulfadiazene (SDZ) complexes." Journal of Indian Chemical Society Vol. 84, Dec 2007 (2007): 1216–18. https://doi.org/10.5281/zenodo.5825018.

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Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India <em>E-mail</em> : chandelcps@rediffmail.com <em>Manuscript received 6 March 2007, revised 16 August 2007, accepted 31 August 2007</em> The composition and stability constants of mixed ligand complexes of Pb<sup>II</sup> ion with some amino acids (L-serine, L-aspartic acid and L-glutamic acid) [X] and sulfadiazene (SDZ) [Y] have been investigated voltammetrically. The reduction of Pb<sup>II</sup> has been found to be reversible and diffusion controlled involving two electrons in each case. The compositi

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26

Asadi, Mozaffar, and Khosrow Aein Jamshid. "Thermodynamics of triaryltin chloride adduct complexes." Canadian Journal of Chemistry 79, no. 1 (2001): 70–74. http://dx.doi.org/10.1139/v00-178.

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The stability constants and the thermodynamic data were measured spectrophotometerically for 1:1 adduct formation of triaryltin chlorides, where aryl groups are p-chlorophenyl, phenyl, p-, m-, and o-tolyl, as Lewis acids, with chloride and bromide ions, as Lewis bases, in 50% v/v ethanol-water solvent. The stability constants and the thermodynamic parameters trend, confirmed the following softness trend of tin(IV) in the triaryltin chlorides:(p-, m-, o-tolyl)3SnCl > (phenyl)3SnCl > (p-chlorophenyl)3SnClKey words: tin(IV) complexes, thermodynamic parameters, mixed solvent, adduct formatio

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27

Mahendra, Kumar Verma, and P. Singh Chandel C. "Complexation behaviour of Cd with methylimino diacetic acid (MIDA) and some amino acids at DME." Journal of Indian Chemical Society Vol. 82, Nov 2005 (2005): 967–71. https://doi.org/10.5281/zenodo.5824633.

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Department of Chemistry. University of Rajasthan, Jaipur-302 004, India <em>E-mail</em> : chandelcps@rediffmail.com <em>Manuscript received 20 February 2004, revised 28 September 2004, accepted 5 August 2005</em> Complexation behaviour of Cd with methylimino diacetic acid (MIDA) and some amino acids (alanine, glycine, aspartic and glutamic) have been investigated at DME. The formation of MXY, MXY<sub>2</sub> and MX<sub>2</sub>Y complexes has been identified. The reduction of all these complexes has been found to be reversible and diffusion controlled, involving two electrons. The treatment of

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28

Kana, Ram Jangid, and P. Singh Chandel C. "Studies on mixed ligand complexes involving (N-methyliminodiacetic acid)- lead(II) and some bioligands : A voltammetric investigation." Journal of Indian Chemical Society Vol. 86, Jan 2009 (2009): 97–99. https://doi.org/10.5281/zenodo.5807282.

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Department of Chemistry, University of Rajasthan, Jaipur-302 004, Rajasthan, India <em>E-mail</em> : chandelcps@rediffmail.com <em>Manuscript received 27 May 2008, revised 8 September 2008, accepted 9 September 2008</em> Composition and stability constants of mixed ligand complexes of Pb<sup>II</sup> ion with N-methyliminodiacetic acid (MIDA) and some amino acids have been investigated voltammetrically. The reduction of Pb<sup>II</sup> has been found to be reversible and diffusion controlled involving two electrons in each case. Only MXY<sub>2</sub> type of mixed ligand complexes are

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29

Tewari, Brij Bhushan. "Paper ionophoretic technique in the study of biologically important beryllium(II) / cobalt(II)-homoserine binary complexes in solution." Macedonian Journal of Chemistry and Chemical Engineering 29, no. 2 (2010): 139. http://dx.doi.org/10.20450/mjcce.2010.160.

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Quantitative indication of the process of forming a complex comes from the evaluation of the stability constants, which characterize the equilibria corresponding to the successive addition of ligands. A method, involving the use of paper electrophoretic technique is described for the study of binary complex system in solution. Present method is based upon the migration of a spot of metal ions on a paper strip at different pH’s of background electrolyte. A graph of pH against mobility gives information about the binary complexes and permits calculation of their stability constants. The first an

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30

Shoukry, Azza, and Wafaa Hosny. "Coordination properties of N,O-carboxymethyl chitosan (NOCC). Synthesis and equilibrium studies of some metal ion complexes. Ternary complexes involving Cu(II) with (NOCC) and some biorelevant ligand." Open Chemistry 10, no. 1 (2012): 59–70. http://dx.doi.org/10.2478/s11532-011-0116-5.

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AbstractIn the present study, the acid-base equilibria of N,O-carboxymethy chitosan abbreviated as (NOCC), is investigated. The complex formation equilibria with the metal ions Cu(II), Ni(II), Co(II), Mn(II), and Zn(II) are investigated potentiometrically. The stability constant values of the binary and ternary complexes formed in solution were determined and the binding centers of the ligands were assigned. The relationships between the properties of the studied central metal ions as ionic radius, electronegativity, atomic number, and ionization potential, and the stability constants of the f

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31

Al-Mohaimeed, Amal M., and Asma A. Alothman. "Characterization by Potentiometric Procedures of the Stability Constants of the Binary and Ternary Complexes of Cu(II) and Duloxetine Drug with Amino Acids." Journal of Chemistry 2019 (April 22, 2019): 1–13. http://dx.doi.org/10.1155/2019/1064942.

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Potentiometric titration method has been used to define stoichiometries and stability constants of ternary complexes of Cu(II) with duloxetine (D) and some selected amino acids (L). The protonation constants of the ligands and the stability constants of the binary and ternary complexes of Cu(II) with the ligands were calculated from the potentiometric data using the HYPERQUAD program. The formation constants of the complexes formed in aqueous solutions and their concentration distributions as a function of pH were evaluated at 25°C and ionic strength 0.10 mol·L−1 NaNO3. Respective stabilities

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32

Lytkin, Alexandr I., Natalya V. Chernyavskaya, and Darya K. Smirnova. "STABILITY CONSTANTS OF L-ASPARAGINE AND L-LEUCINE COMPLEXES WITH SOME LANTHANIDE IN AQUEOUS SOLUTIONS AT 298.15 K." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 61, no. 1 (2017): 37. http://dx.doi.org/10.6060/tcct.20186101.5629.

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Lanthanides have a high affinity toward ligands containing donor oxygen atoms, especially amino acids and complexons. The study of the processes of complexation of amino acids with f-element cations provides valuable information for solving problems of supramolecular chemistry, molecular recognition and chiral sensitivity of biological substrates. As a rule, f-elements are not components of biopolymers, but they are spectral label probes, which are important in the bioinorganic chemistry of metals. Quantitative estimation of the stability of complexes is necessary, first of all, to search for

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33

Sabo, Yusuf, W. L. O. Jimoh, Isa Baba Koki, and Q. O. Sholadoye. "Stability constants of complexes of metal ions with peatsoil humic acids under non-acid-conditions." Bayero Journal of Pure and Applied Sciences 14, no. 1 (2021): 54–63. http://dx.doi.org/10.4314/bajopas.v14i1.8.

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Stability constants of complexes of four divalent metal ions viz. Cu2+, Pb2+,Mg2+ and Cd2+ with humic acids (HA) were determined by potentiometric titration of humic acids with the corresponding salt of the divalent metals in aqueous media under non-acid-condition. The log K (logarithm of the stability constant) ranged from 1.0942 to 2.7471 for metal-humic acid complexes were determined using point-wise computational method. The order of stability constants were obtained as follows: Cu >Pb> Cd > Mg for metal -HA complexes respectively, indicating a higher degree of complexation with C

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34

Surányi, Terézia M., Evgenija A. Djurendić, and Gyöngyi Gy Vastag. "Spectrophotometric Study of the Formation of Iron(III) Complexes with Some Salicylic Acid Derivatives." Collection of Czechoslovak Chemical Communications 60, no. 3 (1995): 464–72. http://dx.doi.org/10.1135/cccc19950464.

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The stoichiometric ratio and stability constants of iron(III) complexes with 1,n-di-O-salicyloylalkane-1,n-diols (n = 2 - 8) and N,N'-disalicyloyl-1,n-alkanediamines (n= 2 - 4) were determined spectrophotometrically. In 61.10% aqueous ethanol, the iron-to-ligand ratio is 1 : 1 (FeL+). The stability constants of the complexes were measured at 298 K and μ = 0.5 mol dm-3 (LiCl). Since the determination was performed in a glycinate buffer, the constants were corrected for the side reaction of iron(III) with glycine.

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35

Farhan, Aesa. "Synthesis, Identification of Co(II), Cu(II) and Ni(II) Complexes with A Schiff Base–Azo Ligand Derived from Imidazol Derivatives, 4- Aminoacetophenon and 4- Chloroaniline and Study Their Physical Properties and Their Thermodynamic Stabilities." JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences 27, no. 3 (2019): 406–19. http://dx.doi.org/10.29196/jubpas.v27i3.2554.

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The complexes of Co(II), Cu(II) and Ni(II) were synthesized by using schiff base – azo as a ligand, which were prepared under this study by the reaction between the Schiff base diazonium salt and the imidazole derevitive. They were characterized by element analysis, FTIR spectroscopy and UV.VIS. spectroscopy. Their electric conductivity and magnetic features were determined. Their stepwise and overall stability constants and their thermodynamic data ( , and ) were determined. The results showed that all the complexes have paramagnetic features and all of them have good conductivity. The formul

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36

Delgado, Rita, Judite Costa, Krassimira P. Guerra, and Luís M. P. Lima. "Lanthanide complexes of macrocyclic derivatives useful for medical applications." Pure and Applied Chemistry 77, no. 3 (2005): 569–79. http://dx.doi.org/10.1351/pac200577030569.

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The protonation constants of two series of tetraazamacrocyclic ligands with acetate and methylphosphonate pendant arms, as well as their stability constants with Cu2+, La3+, Sm3+, and Ho3+, were determined. All the values were determined in aqueous solution at 298.0 K and 0.10 mol dm–3 in N(CH3)4NO3. In the first series, the effect of both types of pendant arms was observed by appending them in the same macrocyclic backbone, a 14-membered tetraazamacrocycle containing pyridine (ac3py14, p2py14, and p3py14). In the second series, two effects were taken into account, the increase of the cavity s

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37

Siddappa, Kuruba, and Nabiya Sultana Mayana. "Synthesis, Spectroscopic Characterization, and Biological Evaluation Studies of 5-Bromo-3-(((hydroxy-2-methylquinolin-7-yl)methylene)hydrazono)indolin-2-one and Its Metal (II) Complexes." Bioinorganic Chemistry and Applications 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/483282.

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The Schiff base ligand 5-bromo-3-(((8-hydroxy-2-methylquinolin-7-yl)methylene)hydrazono)indolin-2-one (BHMQMHI) was preparedviacondensation of 5-bromo-3-hydrazonoindolin-2-one and 7-formyl-8-hydroxy-2-methylquinoline and its Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) complexes have been synthesized and characterized by elemental analysis, conductance data, magnetic susceptibility measurements, IR, UV-Vis, mass spectrometry,1H NMR, ESR, XRD, and thermal studies. By these spectral studies it is found that Co(II), Ni(II), and Cu(II) complexes have exhibited octahedral geometry whereas the

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38

Choppa, Nageswara Rao, and B. V. Sailaja B. "Speciation of binary complexes of PbII and CdII with maleic acid in acetonitrile medium." Journal of Indian Chemical Society Vol. 92, Nov 2015 (2015): 1641–46. https://doi.org/10.5281/zenodo.5679558.

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Department of Inorganic & Analytical Chemistry, Andhra University, Visakhapatnam-530 003, Andhra Pradesh, India <em>E-mail</em> : sailaja_bbv@yahoo.co.in <em>Manuscript received online 14 February 2015, revised 28 April 2015, accepted 01 May 2015</em> The stability constants of maleic acid with Pb<sup>II</sup> and Cd<sup>II</sup> metal ions in different percentage of acetonitrilewater mixtures having varying dielectric constants have been determined pH metrically. The ionic strength (<em>m</em> = 0.16 mol L<sup>–1</sup>) was maintained constant. The stability constants (log β) o

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39

Kostic, Ivana, Tatjana Andjelkovic, Ruzica Nikolic, Tatjana Cvetkovic, Dusica Pavlovic, and Aleksandar Bojic. "Comparative study of binding strengths of heavy metals with humic acid." Chemical Industry 67, no. 5 (2013): 773–79. http://dx.doi.org/10.2298/hemind121107002k.

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The complexation of humic acid with certain heavy metal ions (Co(II), Ni(II), Cu(II), Zn(II) and Pb(II)) was investigated. The stability constants of humate complexes were determined by method which is based on distribution of metal ions between solution and resin in the presence and the absence of ligand, known as Schubert?s ion exchange method. Experiments were performed at 25 ?C, at pH 4.0 and ionic strength of 0.01 mol dm-3. It was found that the 1:1 complexes were formed between metal ions and humic acid. Obtained results of the stability constants, log ?mn, of complexes formed between th

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Do, Xuan Truong, Van Hoang Nguyen, and Van Thiep To. "Study of the Nickel Complex Formation with Citric Acid in A Mixture Alkyl Polyglycoside10 (APG10) Surfactant/Water System." International Journal of Engineering Research & Science 6, no. 3 (2020): 36–41. https://doi.org/10.5281/zenodo.3734010.

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<strong><em>Abstract</em></strong><strong><em>—</em></strong> <em>The stability constants of complexes formed by metal cations Ni(II) and citric acid in water and in APG10 surfactant/water medium are determined by the pH titration method combined with using Hyss 2009 simulation software.</em> <em>Under experimental conditions, the Ni(II) complexes with citric acid ligand were determined consisting of [NiCit]<sup>-</sup>, [NiHCit], [NiCit<sub>2</sub>]<sup>4-</sup> and [NiHCit<sub>2</sub>]<sup>3-</sup></em><em>. The logβ values of the stability constants of the complex species are lin

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41

Atabey, Hasan, Faisal Naji Al-Obaidi, and Hayati Sari. "Potentiometric Study of the Dissociation and the Metal Complex-formation Competence of 5-(3,3-dimethyl-1- triazeno)-imidazole-4-carboxamide (Dacarbazine)." Acta Chimica Slovenica 70, no. 1 (2023): 21–28. http://dx.doi.org/10.17344/acsi.2022.7756.

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A potentiometric investigation has been carried out to disclose the coordination properties of Dacarbazine, 5-(3,3-dimethyl-1-triazeno)-imidazole-4-carboxamide (abbreviated DTIC) with particular transition metal ions (Zn2+, Cu2+, Ni2+ and Co2+). The coordination of DTIC with these metal ions results in several complexes emerging in solution. The aim of this work is to determine the protonation constants of the DTIC and to show the extent of its coordination with (Zn2+, Cu2+, Ni2+ and Co2+), in other words, establish the stability of the complexes formed between the DTIC and these metal ions by

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Kuznetsova, Rimma T., Yulia V. Aksenova, Georgii V. Mayer, and E. V. Antina. "The Interactions with Proton-Donor Solvents and Stability of some Borondipyrrinates." Advanced Materials Research 1088 (February 2015): 386–90. http://dx.doi.org/10.4028/www.scientific.net/amr.1088.386.

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The constants of acid-base equilibrium were estimated with spectroscopic method at the ground (S0) and at the fluorescent (S1fl) states. The constants of acid-base equilibrium for Franck-Condon excited states (S1F-C) were estimated from spectral shifts for basic and acid forms. This results are compared with quantum yields of photostability of complexes in neutral solvents. The mechanisms of complexes protonation are discussed dependence from the structure of ligands.

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43

Sulaiman, Ahmed Mohammed, and Abdulaziz Khaled Awwad. "Preparation and Characterization of Cu(II)- and Pt(II)-Thiourea Complexes and Adsorption of Pt(II) Complex on Local Bentonite." Indonesian Journal of Chemistry 25, no. 3 (2025): 837. https://doi.org/10.22146/ijc.103680.

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This study investigates the stability and adsorption behavior of inorganic complexes formed from the reaction of 2-aminopyridine with phenyl isothiocyanate to produce thiourea derivatives, which were further reacted with copper salts and platinum phosphine. The complexes were characterized using UV-vis and FTIR spectroscopies, revealing a 2:1 (ligand-to-metal) ratio and high stability. The effect of temperature on the stability showed a slight increase in absorption values with rising temperature. Stability constants and thermodynamic functions confirmed the complexes' stability at room temper

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Tewari, Brij Bhushan. "Studies on biologically important copper(II) / manganese(II) / uranyl(II) – norvaline binary complexes." Macedonian Journal of Chemistry and Chemical Engineering 27, no. 2 (2008): 157. http://dx.doi.org/10.20450/mjcce.2008.236.

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In coordination compounds studies, a knowledge of the magnitude of the stability constants of complexes is necessary for preliminary quantitative treatment. Described herein is a method that involves the use of advanced ionophoretic technique for the study of the equilibria in binary complex systems in solution. This method is based upon the migration of a spot of the metal ion on a paper strip at different pH values of background electrolyte containing 0.1 M perchloric acid and 0.01 M norvaline. A graph of pH against mobility provides information about the nature of the complexation and helps

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B., S. Sekhon, and Kaur Charanjit. "Proton-ligand stability constants of cefadroxil and stability constants of its metal complexes in aqueous-organic mixtures." Journal of Indian Chemical Society Vol. 83, Oct 2006 (2006): 1037–38. https://doi.org/10.5281/zenodo.5831356.

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Department of Biochemistry and Chemistry, Punjab Agricultural University, Ludhtana-141 004, PunJab, lndta <em>E-mail </em>: sekhon224@yahoo.com <em>Manuscript received 4 January 2006, revised 27 July 2006, accepted 31 July 2006</em> Proton-ligand stability constants of cefadroxil and its metal-ligand stability constants with cu<sup>2</sup>+, Cd<sup>2</sup> and Co<sup>2</sup>+ ions were determined pH-metrically at 30 ºC and ionic strength of 0.15 M KCI in aqueous, water-alcohol (75 : 25% v/v) and water-dioxane (75 : 25% v/v) mixtures. Cefadroxil formed 1 : 1 (ML) complexs with Cd<sup>2</su

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Zou, Shi-Fu, Jie Zhou, and Wei-An Liang. "Spectrophotometric determination of stability constants of anti-stepwise complexes." Analyst 118, no. 1 (1993): 97. http://dx.doi.org/10.1039/an9931800097.

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Gaizer, F., P. Sipos, and J. Lázár. "The stability constants of silver-iodide complexes in DMF." Polyhedron 13, no. 5 (1994): 855–57. http://dx.doi.org/10.1016/s0277-5387(00)81695-2.

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Şişmanoğlu, Tuba, Serap Teksöz, and Çiğdem İçhedef. "Leucine Complexes with Cerium: Stability Constants and Thermodynamic Parameters." Journal of Chemical & Engineering Data 56, no. 4 (2011): 978–83. http://dx.doi.org/10.1021/je1009416.

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Dolaz, Mustafa, Mehmet Tümer, and Metin Diğrak. "Synthesis, Characterization and Stability Constants of Polynuclear Metal Complexes." Transition Metal Chemistry 29, no. 5 (2004): 528–36. http://dx.doi.org/10.1023/b:tmch.0000037520.05914.66.

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Kiss, T., I. Sovago, and A. Gergely. "Critical survey of stability constants of complexes of glycine." Pure and Applied Chemistry 63, no. 4 (1991): 597–638. http://dx.doi.org/10.1351/pac199163040597.

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