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Journal articles on the topic 'Metal ligand composition'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Shukla, S., S. Gautam, S. Chandra, and A. Kumar. "SYNTHESIS, SPECTRAL STUDIES, STRUCTURAL EVALUATION AND ANTIMICROBIAL ACTIVITY OF SOME NOVEL C R(III) COMPLEXES CONTAINING TETRADENTATE MACROCYCLIC LIGANDS." INDIAN DRUGS 54, no. 06 (2017): 20–29. http://dx.doi.org/10.53879/id.54.06.10962.

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A string of novel coordination compounds of Cr(III) complexes have been derived and characterized from the macrocyclic ligands (L 1 -L 2 ) carried out by condensation reaction between ligands and the subsequent metal salt. The chemical composition of ligand was determined by analytical and spectral techniques i.e. elemental analysis, IR and Mass spectrocopy. Spectral techniques revealed tetradentate [N 4 ] the nature of ligand and its coordination mode to metal ion through nitrogen donor atoms. Metal complexes were characterized by elemental analyses, molar conductance, magnetic susceptibility

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2

Shamsutdinova, Medina Humaidovna, Nur-Magomed Rezvanovich Tashligov, and Yunus Yakubovich Kurbanov. "SYNTHESIS, STRUCTURE AND PROPERTIES OF COMPLEX COMPOUNDSOF COBALT (II) WITH BENZOXASINE DERIVATIVES." National Association of Scientists 1, no. 30(57) (2020): 75–78. http://dx.doi.org/10.31618/nas.2413-5291.2020.1.57.263.

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In this work, coordination compounds of Co (II) with derivatives of dihydro-4H-3,1-benzoxazines were synthesized by a chemical method and their composition, structure, and physicochemical properties were studied. ... According to the data of elemental analysis and analysis for metal, the obtained complex compounds have the composition ML2, where M is metal, L are ligands: 2- [2-hydroxyphenyl] -4,4-diphenyl-1,2-dihydro-4H-3,1benzoxazine (L1), 2- [2-hydroxy-5-nitrophenyl] -4,4-diphenyl-1 , 2-dihydro-4H-3,1-benzoxazine (L2), 2- [2hydroxynaphthyl] -4,4-diphenyl-1,2-dihydro-4H-3,1-benzoxazine (L3),

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3

Jamil, Yasmin Mos'ad, Fathi Mohammed Al-Azab, and Nedhal Abdulmawla Al-Selwi. "Novel organophosphorus Schiff base ligands: Synthesis, characterization, ligational aspects, XRD and biological activity studies." Ecletica Quimica 48, no. 3 (2023): 36–53. http://dx.doi.org/10.26850/1678-4618eqj.v48.3.2023.p36-53.

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Six complexes have been synthesized from Cu(II), Ni(II), and Co(II) with new bidentate N2 donor Schiff base ligand (2-methoxybenzalidene-1-phenylsemicarbazide L1) and tridentate N2O donor organophosphorus Schiff base ligand (2-methoxybenzalidenediphenylphosphate-1-phenylsemicarbazide L2). Both ligands were synthesized and characterized by metal analysis, infrared (IR), ultraviolet visible (UV-Vis), and nuclear magnetic resonance (NMR) spectral studies. The chemical structures of the synthesized complexes were characterized using their metal analysis, magnetic susceptibility, molar conductance,

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Kapustian, A., and N. Cherno. "Determination of complex forming ability of mixed-ligand organic systems relative to the metal ions." Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 21, no. 91 (2019): 130–35. http://dx.doi.org/10.32718/nvlvet-f9122.

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It is shown that classical and specific methods for determining the complex forming ability of mixed-ligand organic systems relative to the metal ions is not perfect. Determination of complex-forming ability of mixed-ligand organic systems relative to the metal ions using the method of turbidimetry for media containing biometal chlorides, mixed-ligand systems and sodium carbonate is proposed. As mixed-ligand systems used the culture fluid Bifidobacterium bifidum AC-1670 (mixed-ligand system I), the culture fluid of the composition of probiotic bacteria (mixed-ligand system II), the culture flu

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5

Aiyelabola, T. O., E. O. Akinkunmi, and O. Osungunna. "Syntheses, Characterization and Biological Activity of Coordination Compounds of Propanedioic Acid and its Mixed Ligand Complexes with N,N'-Dihydroxy-2,3-butanediimine." Asian Journal of Chemistry 33, no. 8 (2021): 1911–18. http://dx.doi.org/10.14233/ajchem.2021.23309.

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The coordination compounds of propanedioic acid with cobalt(II), nickel(II) and copper(II) ions were synthesized using metal:ligand 1:2. In addition to this, mixed ligand complexes using the same metal ions with propanedioic acid as the primary ligand and N,N'-dihydroxy-2,3-butanediimine as the secondary ligand were also synthesized using M:L1:L2 (1:1:1) where L1 = propanedioic acid, L2 = N,N'-dihydroxy-2,3-butanediimine and M = Cu(II), Ni(II) and Cu(II). The synthesized compounds were characterized using FTIR, UV-vis, magnetic susceptibility measurement and percentage metal composition. The l

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6

P., C. NIGAM, M. NAIK R., and PRASAD S. "Kinetics and Mechanisms of Ligand Exchange Reactions : A Review." Journal of Indian Chemical Society Vol. 69, Aug 1992 (1992): 475–80. https://doi.org/10.5281/zenodo.6022701.

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Department of Chemistry, Manipur University, Imphal-795 003<strong> </strong> Department of Chemistry. Indian Institute of Technology, Kanpur-208 016<strong> </strong> <em>Manuscript received 27 March 1991</em> Chemical reactions in which the composition of the first coordination sphere around a metal centre changes, are termed ligand exchange reactions  A  thorough appreciation of the chemistry of transition metals requires an understanding and knowledge of their reaction mechanisms In this review we discuss the salient features of exchange reactions under the following heads a

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7

Noor, Mah, Hamza Chah, David Tresp, Ivan Bernal, and Roger A. Lalancette. "The versatility of 1,4,8,11-tetraazacyclotetradecane (cyclam) in the formation of compounds of Co²⁺, Ni²⁺, Cu²⁺, and Zn²⁺ with metal ions in and out of the cyclic ligand ring." Zeitschrift für Kristallographie - Crystalline Materials 238, no. 7-8 (2023): 243–51. http://dx.doi.org/10.1515/zkri-2023-0026.

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Abstract Herein we report the results of preparing metal compounds (where the metal ions are Co2+, Ni2+, Cu2+, Zn2+) with the cyclic ligand 1,4,8,11-tetraazacyclotetradecane [cyclam] under a variety of conditions of metal-ligand ratios and solvent media. In all cases, we used metal Cl2·nH2O salts (except for anhydrous CoCl2), as specified. Outcome: we isolated species with a four-coordinate metal in the N4 cavity of the ligand alone, and also with either one or two additional axial ligands. Those axial ligands can be (a) a single chloride, leading to penta-coordinated moncationic products; (b)

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8

Kareem, May Joda. "Synthesis, Spectroscopic Study and Biological Activity of new Bidentate Schiff Base (4-(Dimethylamino) Benzylidene)-5-(3,4,5-Trimethoxybenzyl)-5 Pyrimidine-2,4-Diamine) and Transition Metal Mn(II), Ni(II) and Cu(II) Complexes." Pakistan Journal of Medical and Health Sciences 16, no. 5 (2022): 655–59. http://dx.doi.org/10.53350/pjmhs22165655.

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The Schiff bases ligand (L1) was synthesized by condensing (2,4-diamine (Trimethoxybenzyl 3,4,5)-5 pyrimidine) and (4-dimethylamino benzaldehyde). The transition metal complexes of [Mn(L1)2Cl2], [Ni(L1)2Cl2], and [Cu (L1)2Cl2] were then produced. The ligand and its metal complexes Mn(II), Ni(II), and Cu(II) were examined by analyzing the elemental composition, the metal content, the chloride content, and the molar conductance, FT-IR, 1H-NMR, UV-Vis spectra, magnetic susceptibility, mass spectra, and thermal analysis (TGA). The results indicated that the ligand behaves as a bidentate ligand in

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9

A., Padmaja, Laxmi K., and Sarala Devi Ch. "Spectro-analytical studies on (E)-N' -(2-hydroxybenzylidene) benzohydrazide and its interaction with CuII." J. Indian Chem. Soc. Vol. 88, Feb 2011 (2011): 183–87. https://doi.org/10.5281/zenodo.5763425.

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Department of Chemistry, Nizam College, Osmania University, Basheerbagh, Hyderabad-500 091, India <em>E-mail</em> : dr_saraladevich@yahoo.com Fax : 91-040-23240806 Department of Chemistry, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad-500 075, India <em>E-mail</em> : katta_laxmi2000@yahoo.co.in <em>Manuscript received 19 February 2010, revised 21 May 2010, accepted 03 June 2010</em> The ligand (E)-<em>N</em>' -(2-hydroxybenzylidene)benzohydrazide formed a green coloured complex with Cu<sup>ll</sup> metal. The composition of complex was determined spectrophotometrically, b

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10

Stanila, Andreea, and Sorin Stanila. "Spectroscopic Studies of Aminoacids Complexes with Biometals." Chemistry Journal of Moldova 7, no. 1 (2012): 140–44. http://dx.doi.org/10.19261/cjm.2012.07(1).26.

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The [Cu(L)2]·H2O, [Co(L)2]·2H2O, [Zn(L)2]·H2O complexes with methionine (L) as ligand, were synthesized in water solution and analyzed by means of: elemental analysis, atomic absorption spectroscopy, thermogravimetry, FT-IR, UV-VIS and EPR spectroscopies. The atomic absorption spectroscopy and elemental measurements confi rm the ratio 1:2 metal ion: methionine composition for the synthesised compounds.The IR spectra show that amino acids act as bidentate ligands with coordination involving the carboxylic oxygen and the nitrogen atom of the amino group. Spectral UV-VIS data confi rmed the coval

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11

K., C. MALHOTRA, BALA NEERAJ SHARMA BRIJ, S. BHATI S., and CHAUDHRY S.C. "Adducts of 4-t-Butylphenoxo Complexes of Oxovanadium(v) with 2-, 3- and 4-Cyanopyridines." Journal of Indian Chemical Society Vol. 75, Mar 1998 (1998): 137–39. https://doi.org/10.5281/zenodo.5915570.

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Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla-171 005 <em>Manuscript received 27 May 1996, revised 14 March 1997, accepted 16 May 1997</em> 4-t-Butylphenoxo-complexes of oxovanadium(v) of composition <strong>VOCl<sub>3-x</sub>(OC<sub>6</sub>H<sub>4</sub>Bu<sup>t</sup>-4)<sub>x</sub></strong>, where x = 1 → 3, react with 2-, 3- and 4- cyanopyridines to give adducts of varying composition. 2-Cyanopyridine forms adduct of 1 : 1 composition, coordinating simultaneously through pyridine as well as nitrile nitrogens of the ligand, while 3- and 4-cyanopyridines forms

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12

Shiekh, Rayees Ahmad, Maqsood Ahmad Malik, Shaeel Ahmed Al-Thabaiti, Mohmmad Younus Wani, and Arshid Nabi. "Microwave Assisted Synthesis, Spectral and Antifungal Studies of 2-Phenyl-N,N′-bis(pyridin-4-ylcarbonyl)butanediamide Ligand and Its Metal Complexes." Scientific World Journal 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/404617.

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2-Phenyl-N,N′-bis(pyridin-4-ylcarbonyl)butanediamide ligand with a series of transition metal complexes has been synthesizedviatwo routes: microwave irradiation and conventional heating method. Microwave irritation method happened to be the efficient and versatile route for the synthesis of these metal complexes. These complexes were found to have the general composition M(L)Cl2/M(L)(CH3COO)2(where M = Cu(II), Co(II), Ni(II), and L = ligand). Different physical and spectroscopic techniques were used to investigate the structural features of the synthesized compounds, which supported an octahed

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13

Priya, P., S. Vedanayaki, and P. Jayaseelan. "Synthesis, Spectral Characterization and Biological Evaluation of Schiff Base Metal Complexes Derived from Aniline Derivative." Asian Journal of Chemistry 31, no. 9 (2019): 2095–100. http://dx.doi.org/10.14233/ajchem.2019.22129.

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A new Schiff base ligand (L) N-(4-fluorophenyl)-1-(4-(((4-fluorophenyl)imino)methyl)phenyl)- methaninmine was prepared by the condensation of terephthalaldehyde with 4-fluoroaniline in 1:2 molar ratio. The mononuclear complexes of Co(II), Ni(II), Cu(II) and Zn(II) (1-4) have been synthesized in (2:1) ligand to metal ratio. The composition, geometry and binding sites of ligand with metal complexes were evidenced by various spectral methods like molar conductance, elemental analytical data, magnetic measurements, UV-visible, 1H & 13C NMR, ESI-MS, FT-IR, ESR and thermal analysis. The above st

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14

Sakhare, Kuldeep, Kirti Sarwade, Yogesh Bharate, and Mahadeo Sakhare. "Anticancer acitivity of Schiff base ligand(E)-4-((5-chloro-2 hydroxybenzylidene) amino)-1, 5-dimethyl-2-phenyl-1H-pyrazol-3(2H)- one and its Co(II), Cu(II) and Zn(II) metal complexes." Journal of the Serbian Chemical Society, no. 00 (2023): 92. http://dx.doi.org/10.2298/jsc230803092s.

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A series of transition metal complexes of Mn(II),Co(II), Ni(II), Cu(II), Zn(II) and VO(II) has been prepared by using the Schiff base ligand (L) derived from 4-aminoantipyrine and 5-chlorosalicylaldehyde. The structural properties of Schiff base ligand have been characterized by Mass, FT-IR, UV-VIS, 1H NMR spectroscopy etc. as well as metal complexes also studied by P-XRD, elemental analyses, thermogravimetric studies and various biological activities. The micro analytical data shows that, the metal complexes has been found to be 1:1 stoichiometry composition of M:L. Generally, it is observed

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15

Borisova, Nataliya E., Anastasiia V. Kharcheva, Kirill D. Shmelkov, et al. "Formation of Complexes of f-Elements with Electron-Withdrawing N-Heterocyclic Diamides: Extraction and Solution Photophysics." Metals 13, no. 12 (2023): 2024. http://dx.doi.org/10.3390/met13122024.

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To examine the scope of the abnormal aryl strengthening effect (an increase in the extraction of metal ions when an aromatic substituent is introduced into the amide group) on f-metal extraction, a series of tetradentate diamide-type extragents bearing electron-withdrawing pyridine rings in amide moieties of the molecules were tested. The solvent extraction of Am(III)/Eu(III) pairs was investigated under various conditions, the solution chemistry of the lanthanide-extragents systems was studied, and the bonding constants were calculated for complexes of Eu(III) and Tb(III) ions with diamides.

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16

Jureddy, Chinmai Sai, Krzysztof Maćkosz, Aleksandra Butrymowicz-Kubiak, Iwona B. Szymańska, Patrik Hoffmann та Ivo Utke. "Electron beam-based direct writing of nanostructures using a palladium β-ketoesterate complex". Beilstein Journal of Nanotechnology 16 (15 квітня 2025): 530–39. https://doi.org/10.3762/bjnano.16.41.

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Gas-assisted focused electron beam-induced deposition (FEBID) as a direct, minimally invasive 3D nanopatterning tool offers many advantages in making nanostructures with complex shapes and novel compositions for evolving nanotechnological applications. In this work, structures were nanoprinted using a fluorine-free β-ketoesterate complex, bis(tert-butylacetoacetate)palladium(II), [Pd(tbaoac)2]. The internal nanostructure and composition of the deposits were determined, and possible volatile products produced under electron-induced dissociation, explaining the composition, are investigated. A m

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17

Singh, Jagvir, Anuradha, Pradeep Kumar, Mordhwaj, and Ravi Kumar. "Synthesis and Spectral Studies of Some Bioactive Transition Metal Complexes of [bis-2-(4-Fluorophenyl)prop-2-enaln]ethane-1,2-diamine." Asian Journal of Chemistry 31, no. 10 (2019): 2357–60. http://dx.doi.org/10.14233/ajchem.2019.22049.

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Co(II), Ni(II) and Cu(II) metal complexes of a novel Schiff base ligand (SBL) derived from condensation of 2-(4-fluorophenyl)prop-2-enaln and ethane-1,2-diamine were synthesized. All the complexes were characterized by elemental analyses, IR, UV-visible spectroscopy, magnetic susceptibility and conductance measurements and 1H NMR. From the elemental analysis data, 1:1 [M]:[ligand] metal chloride complexes are formed having the general composition [M(SBL)Cl2] and [Cu(SBL)] Cl2, [where M = Co(II), Ni(II) and SBL= {bis-2-(4-fluorophenyl)prop-2-enaln}ethane-1,2-diamine]. The result showed that the

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18

Wöhlert, Susanne, Inke Jess, and Christian Näther. "Synthesis, Structures, and Thermal and Magnetic Properties of New Coordination Polymers Based on Mn(II) and Ni(II) Thiocyanato Complexes with trans-1,2-Bis(4-pyridyl)ethylene as Ligand." Zeitschrift für Naturforschung B 67, no. 1 (2012): 41–50. http://dx.doi.org/10.1515/znb-2012-0108.

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Hydrothermal reaction of manganese(II) thiocyanate with trans-1,2-bis(4-pyridyl)ethylene (bpe) in water leads to the formation of the new ligand-rich 1 : 3 (ratio metal/ligand) compound [Mn(NCS)2- (bpe)2・(bpe)] (1-Mn). In the crystal structure the manganese cations are octahedrally coordinated by two thiocyanato anions and four bpe ligands and are linked into layers by the bpe ligands. Reaction of manganese(II) thiocyanate with bpe in water leads to the known 1 : 2 compound Mn(NCS)2- (bpe)2(H2O)2 (2-Mn). On heating compound 1-Mn is transformed directly into a ligand-deficient 1 : 1 compound of

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19

Reiss, Aurora, Raul-Augustin Mitran, Cristina Babeanu, et al. "New Bioactive Co(II) and Ni(II) Complexes with Ofloxacin Mixed-Ligand." Revista de Chimie 71, no. 10 (2020): 11–27. http://dx.doi.org/10.37358/rc.20.10.8346.

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Four mixed-ligand metal(II) complexes with the molecular formulae [M(ofl)(bipy)]NO3�H2O and [M(ofl)(phen)]NO3�H2O were synthesized by the reaction of Co(II) and Ni(II) with ofloxacin (Hofl) in the presence of 1,10-phenanthroline (phen) / 2,2`-bipyridine (bipy) (1:1:1 molar ratio). The data obtained from elemental analysis, molar conductance, spectral infrared, reflectance spectra and magnetic studies gave information about the coordination of the ligands and the geometry of the metallic ion. The results suggest that Hofl is deprotonated and bidentately bound to the metal ion through the pyrido

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20

Lee, Jennifer D. "(Invited) understanding and Engineering Atomically Precise Metal and Metal Oxide Nanocrystals." ECS Meeting Abstracts MA2025-01, no. 37 (2025): 1743. https://doi.org/10.1149/ma2025-01371743mtgabs.

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The development of well-controlled synthesis of metal and metal oxide nanocrystals (NCs) via the colloidal method enables a high degree of control over size, morphology, and composition. The well-defined NCs could potentially overcome the traditional structural heterogeneity observed in conventional synthetic methods and open up new opportunities in systematic studies of their properties. This talk aims to show how the design of atomically precise and nanostructured materials can provide a fundamental understanding of chemical transformations and magnetic properties. Examples include the tailo

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21

Tereshchuk, Polina, Rafael L. H. Freire, and Juarez L. F. Da Silva. "The role of the CO adsorption on Pt monolayers supported on flat and stepped Au surfaces: a density functional investigation." RSC Adv. 4, no. 18 (2014): 9247–54. http://dx.doi.org/10.1039/c3ra44205e.

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Ultrathin metal films supported on transition-metal surfaces have been considered as promising catalysts as their chemical activity can be controlled by substrate strain, composition, and ligand effects, however, our atomistic understanding of the atomic structure of those systems is far from satisfactory.

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22

Ahmed T. Numan. "Synthesis and Characterization of some biologically active transition metal complexes for a ligand derived from dimedone with mixed ligands." Journal of the College of Basic Education 21, no. 88 (2023): 25–36. http://dx.doi.org/10.35950/cbej.v21i88.9950.

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The aim of the work is synthesis and characterization of bidentate ligand [3-(3-acetylphenylamino)-5,5-dimethylcyclohex-3-enone][HL], from the reaction of dimedone with 3-amino acetophenone to produce the ligand [HL], the reaction was carried out in dry benzene as a solvent under reflux. The prepared ligand [HL] was characterized by FT-IR, UV-Vis spectroscopy, 'H, 8C-NMR spectra, Mass spectra, (C.H.N) and melting point. The mixed ligand complexes were prepared from ligand [HL] was used as a primary ligand while 8-hydroxy quinoline [HQ] was used as a&#x

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23

Bansal, Usha, Samta Goyal, and Swati Agrawal. "Synthesis and Spectral Characterization of Mn(II) and Co(II) Complexes with Tetradentate Macrocyclic Ligand." Asian Journal of Chemistry 33, no. 9 (2021): 2207–11. http://dx.doi.org/10.14233/ajchem.2021.23275.

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Manganese(II) and cobalt(II) complexes were synthesized with [N4] tetradentate macrocyclic ligand using different metal salts i.e. MnCl2, Mn(NO3)2, CoCl2 and Co(NCS)2. The ligand was prepared by condensation of glyoxal and carbahydrazide. All these were characterized by elemental analysis, molar conductance measurements, magnetic moment, IR, mass, electronic and EPR spectral studies. Elemental analysis indicates that the complexes have composition MLX2 where (X = Cl–, NO3 –,NCS–). All the complexes were found to be non-electrolytic in nature so can be formulated as [MLX2]. Infrared spectra of

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M., Sivasankaran Nair, and Selwin Joseyphus R. "Investigations on some tridentate Schiff base metal complexes." Journal of Indian Chemical Society Vol. 84, April 2007 (2007): 323–24. https://doi.org/10.5281/zenodo.5816761.

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Department of Chemistry, Manonmaniam Sundaranar University, Tirunelveli-627 012, Tamilnadu, India <em>E-mail </em>: msnairchem @rediffmail.com <em>Manuscript received 16 October 2006, revised 6 February 2007, accepted 7 February 2007</em> The Schiff base complex species formed in cobalt(II), nickel(II), copper(II) and zinc(II)-vanillidene-<em>β</em>-alanine systems were synthesized and characterized. The analytical data show the composition of the metal complex to be MLX, where L is the Schiff base ligand and X is a water molecule. The results demonstrate the tridentate binding of the Sch

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Farcaș, Alex-Adrian, and Attila Bende. "Improving the Light-Induced Spin Transition Efficiency in Ni(II)-Based Macrocyclic-Ligand Complexes." Molecules 24, no. 23 (2019): 4249. http://dx.doi.org/10.3390/molecules24234249.

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The structural stability and photoabsorption properties of Ni(II)-based metal-organic complexes with octahedral coordination having different planar ligand ring structures were investigated employing density functional theory (DFT) and its time-dependent extension (TD-DFT) considering the M06 exchange-correlation functional and the Def2-TZVP basis set. The results showed that the molecular composition of different planar cyclic ligand structures had significant influences on the structural stability and photoabsorption properties of metal-organic complexes. Only those planar ligands that conta

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Journal, Baghdad Science. "Synthesis and characterization of some biological active transition metal complexes of Schiff base derived from cefixime with mixed ligand 8-hydroxy quinoline." Baghdad Science Journal 12, no. 4 (2015): 797–807. http://dx.doi.org/10.21123/bsj.12.4.797-807.

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The aim of the work is synthesis and characterization of bidentate ligand [dipotassium sodium7-((E)-2-(2-((Z)-1-carboxylatoethylideneamino)thiazol-4-yl)-2 (carboxylatemethoxyimino) acet amido)-8-oxo-3-vinyl-5- thia-1-azabicyclo[4.2.0] oct-2- ene-2- carboxylate] [Nak2L], from the reaction of cefixime with sodium pyruvet to produce the ligand [Nak2L], the reaction was carried out in methanol as a solvent under reflux. The prepared ligand [Nak2L] which was characterized by FT-IR, UV-Vis spectroscopy, 1H, 13C-NMR spectra, Mass spectra, (C.H.N) and melting point. The mixed ligand complexes were pre

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Tan, Mingxiong, Jinchan Zhu, Yingming Pan, et al. "Synthesis, Cytotoxic Activity, and DNA Binding Properties of Copper (II) Complexes with Hesperetin, Naringenin, and Apigenin." Bioinorganic Chemistry and Applications 2009 (2009): 1–9. http://dx.doi.org/10.1155/2009/347872.

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Complexes of copper (II) with hesperetin, naringenin, and apigenin of general composition[CuL2(H2O)2]⋅nH2O(1–3) have been synthesized and characterized by elemental analysis, UV-Vis, FT-IR, ESI-MS, and TG-DTG thermal analysis. The free ligands and the metal complexes have been tested in vitro against human cancer cell lines hepatocellular carcinoma (HepG-2), gastric carcinomas (SGC-7901), and cervical carcinoma (HeLa). Complexes1and3were found to exhibit growth inhibition of SGC-7901 and HepG2 cell lines with respect to the free ligands; the inhibitory rate of complex1is 43.2% and 43.8%, while

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M., L. GUPTA, and K. PANDE K. "Studies on Composition and Stability Constants of Complexes of Copper(ll) and Nickel(Il) with 2N-Salicylidene- and 2N-3,5-Dichlorosalicylidene-5-phenyl-1 ,3,4- thiadiazole Schiff Base." Journal of Indian Chemical Society Vol. 62, Jan 1985 (1985): 34–36. https://doi.org/10.5281/zenodo.6302329.

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Government Science College, Gwalior <em>Manuscript received 7 March 1984, accepted 8 November 1984</em> The composition, protonation constants of 2<em>N</em>-salicylidene-5-phenyl-1,3,4-thiadiazole and 2<em>N</em>-3,5-dichlorosalicylidene-5-phenyl-1,3,4-thiadiazole and formation constants of their metal-chelates with Cu<sup>ll</sup> and Ni<sup>ll</sup> in 50% ethanol-water system have been determined by Irving-Rossotti method at various ionic strengths at 25±1°. The observed order of the ligands on the basis of relative strength is SPT >DCSPT. The order of stability of the m

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Taghreed H. Al- Noor, Shifaa Jameel Ibraheem, and Ibtihaj Kadhim Malih. "Synthesis, Characterization, and Antibacterial Properties of mixed ligand Complexes of (L-leucine and 8-hydroxyquinoline) with Fe (III ),Cr (III) La(III)) and Ru(III ) ions." Journal of the College of Basic Education 18, no. 74 (2023): 143–55. http://dx.doi.org/10.35950/cbej.v18i74.9713.

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The research includes the synthesis and identification of the mixed ligands complexes of M+3 Ions in general composition ,[M(Leu)2(Q)] Where L-leucin (C6H13NO2)symbolized as( Leu H) as a primary ligand and 8-hydroxyqinoline,(C9H7NO) symbolized as (8-HQ) as a secondary ligand . The ligands and the metal chlorides were brought in to reaction at room temperature in ethanol as solvent. The reaction required the following molar ratio [(1:1:2)(metal): Q-:2Leu-] with M(III ) ions, were  M(III) = Fe (III ),Cr (III) La(III)) and Ru(III ) The reaction gave solid crystalline

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30

Anosova, Galyna A., Vladislava V. Matveevskaya, Nurgul A. Pirmanova, and Andrei S. Potapov. "Synthesis and Characterization of Transition Metal Complexes of 1,2-Bis(3,5-Dimethylpyrazol-1-yl)-1,2-Ethanediol." Key Engineering Materials 685 (February 2016): 754–58. http://dx.doi.org/10.4028/www.scientific.net/kem.685.754.

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Copper (II), nickel (II) and vanadyl complexes of 1,2-bis (3,5-dimethylpyrazol-1-yl)-1,2-ethanediol were prepared by the reaction of transition metal salts (chloride, acetate, sulfate) with the ligand in ethanol solution. The composition of the complexes was confirmed by elemental analysis and molar conductivity measurements. The coordination modes of the ligand and counter-ions were established from IR spectra and DFT calculations.

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31

Fatullayeva, P. A. "COMPLEXES OF METALS WITH HYDRAZONE HYDRAZIDE SALICYLIC ACID." Chemical Problems 19, no. 2 (2021): 79–83. http://dx.doi.org/10.32737/2221-8688-2021-2-79-83.

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Complexes of Cu (II), Ni (II), and Co (II) with hydrazone derivatives of salicylic acid hydrazide and 3,5-di-tert-butyl salicylic aldehyde (LH) were synthesized and the structure of these compounds studied by means of elemental analysis methods, IR and electronic spectroscopy, magnetochemistry and thermal analysis. It revealed that the complexes are monomeric and have a composition [MLXSoI] where M is a metal ion, L is a ligand, X is an inorganic anion, and Sol is a solvent molecule. LH- in the complexes behaves like a monoanionic tridentate ligand. It found that the resulting complexes exhibi

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32

Petrenko, I., D. Khomenko, R. Doroschuk, and R. Lampeka. "THE SYNTHESIS OF COPPER(II)-CONTAINING 1,2,4-TRIAZOLE COMPLEXES." Bulletin of Taras Shevchenko National University of Kyiv. Chemistry, no. 2(54) (2017): 35–36. http://dx.doi.org/10.17721/1728-2209.2017.2(54).4.

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Methods of the synthesis of the copper(II) containing 3-(2-pyridinyl)-1H-1,2,4-triazole complexes are reported. Systematic studies were devoted to the investigating an importance of triethylamine towards the сomplexation. The various coordination modes that have been observed in complexes were discussed. We noticed the correlations of coordination complexes structure and the metal-ligand correlation. Two mononuclear complexes and one dinuclear complex of a 2:2 composition were obtained. The deprotonation of the ligand in the complex namely [Cu(L)2](H2O)2 was eased by adding triethylamine. The

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33

Gautam, S., P. Pipil, A. Kumar, et al. "Bonding Ability of Isopthalic Acid-bis(thiosemicarbozone) to Manganese and Cobalt Metal Ions: Preparation, Spectral Investigation, Computational and in vitro Antipathogenic Screening." Asian Journal of Chemistry 34, no. 2 (2022): 311–18. http://dx.doi.org/10.14233/ajchem.2022.23508.

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Manganese and cobalt complexes have been designed and prepared with a tetradentate ligand i.e. isopthalic acid-bis(thiosemicarbozone) (IPBT), which bind to metal ions via donor atoms present in ligand. Different spectroscopic techniques viz. nuclear magnetic resonance, infra red, mass, electronic spin resonance and analytical studies have been used to determine the chemical composition of synthesized IPBT and its Mn(II) and Co(II) complexes. The spectroscopic data exposed that IPBT behaves in a tetradentate (N2S2) mode by having ability to bind with metal ions through N2S2 atoms. An octahedral

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34

Pandey, Garima. "Synthesis, IR, UV Studies of Schiff's Base Ligand Dichloro bis (p-methoxy phenyl carbonyl azomethine benzene sulphanilamide and p-methoxy phenyl carbonyl azomethine thiocarbamide and their Mn(II),Co(II),Ni(II) and Cu(II)Complexes." RESEARCH REVIEW International Journal of Multidisciplinary 03, no. 10 (2018): 442–50. https://doi.org/10.5281/zenodo.1467826.

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A novel Schiff’s base ligand p-methoxy phenyl carbonyl azomthine benzene sulphanilamide was isolated from refluxing p-methoxy phenyl glyoxal (10 mmol) and p-amino benzene sulphonamide (10 mmol) in acetonic medium in 1:1 ratio for 4 hours. The configuration of resulting ligand was illustrated by elemental analysis, melting-point analysis, electronic spectra and IR studies. Schiff’s base metal complexes of Mn(II), Co(II), Ni(II), Cu(II) with ligand were also analyzed by molar-conductance studies and magnetic-moment studies. Bsed on the analytical studies, transition-metal complexes h

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35

Farrell, Richard E., Jae E. Yang, P. Ming Huang, and Wen K. Liaw. "Chemical Composition and Metal Speciation in Porewaters from the Upper Qu’Appelle River Basin, Saskatchewan." Water Quality Research Journal 28, no. 1 (1993): 83–110. http://dx.doi.org/10.2166/wqrj.1993.005.

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Abstract Porewater samples from the upper Qu’Appelle River basin in Saskatchewan, Canada, were analyzed to obtain metal, inorganic ligand and amino add profiles. These data were used to compute the aqueous speciation of the metals in each porewater using the computer program GEOCHEM-PC. The porewaters were classified as slightly to moderately saline. Metal concentrations reflected both the geology of the drainage basin and the impact of anthropogenic activities. Whereas K and Na were present almost entirely as the free aquo ions, carbonate equilibria dominated the speciation of Ca. Mg and Mn (

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36

Bourosh, P., M. Cocu, O. Danilescu, and I. Bulhac. "Binuclear Vanadium(V) Complex with the Ligand Based on Isonicotinic Acid Hydrazide and 1-Phenyl-1,3-Butanedione: Synthesis and Crystal Structure." Координационная химия 49, no. 4 (2023): 195–204. http://dx.doi.org/10.31857/s0132344x23700196.

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A new molecular binuclear vanadium(V) complex [VO(L)(OCH3)]2 (I) is synthesized in which ligand H2L is prepared by the reaction of isonicotinic acid hydrazide (INAH, isoniazide) with 1-phenyl-1,3-butanedione. Ligand H2L and complex I are studied by elemental analysis, IR spectroscopy, mass spectrometry, and X-ray diffraction (XRD) (CIF files CCDC nos. 2172124 and 2172125, respectively). The composition and structure of the ligand in the free state is additionally studied by NMR spectroscopy. The bideprotonated organic ligand L2– coordinates to the metal atom via the tridentate mode through a s

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37

Jassim, Liblab S. "Synthesis and Characterization of Complexes of New Derivative of Cyclopentaphenanthren-3-one with Manganese (II), Iron (II), Cobalt (II), Nickel (II), and Copper (II) Ions." Engineering and Technology Journal 38, no. 3B (2020): 197–203. http://dx.doi.org/10.30684/etj.v38i3b.681.

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This work involves the chemical preparation from a series of metal Complexes having the general composition M(L)2(H2O)2, where M = [Mn+2, Fe+2, Co+2, Ni+2 and Cu+2]. The ligand used was 9-fluoro-17-(1-hydrazono-2-hydroxyethyl)-11,17-dihydroxy-10,13,16-trimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[α]phenanthren-3-one (FHDTCP), who was diagnosed by H-NMR spectra. These complexes have been prepared and characterized by the ligand to metal by molar conductance, spectral (UV-Visible and FT-IR), and atomic absorption studies. The IR spectral measurements forecast interference t

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38

Jassim, Liblab S. "Synthesis and Characterization of Complexes of New Derivative of Cyclopentaphenanthren-3-one with Manganese (II), Iron (II), Cobalt (II), Nickel (II), and Copper (II) Ions." Engineering and Technology Journal 38, no. 3B (2020): 197–203. http://dx.doi.org/10.30684/etj.v38i3b.681.

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This work involves the chemical preparation from a series of metal Complexes having the general composition M(L)2(H2O)2, where M = [Mn+2, Fe+2, Co+2, Ni+2 and Cu+2]. The ligand used was 9-fluoro-17-(1-hydrazono-2-hydroxyethyl)-11,17-dihydroxy-10,13,16-trimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[α]phenanthren-3-one (FHDTCP), who was diagnosed by H-NMR spectra. These complexes have been prepared and characterized by the ligand to metal by molar conductance, spectral (UV-Visible and FT-IR), and atomic absorption studies. The IR spectral measurements forecast interference t

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39

Chandra, Sulekh, Monika Tyagi, and Moamen Refat. "Spectroscopic, thermal and antibacterial studies on Mn(II) and Co(II) complexes derived from thiosemicarbazone." Journal of the Serbian Chemical Society 74, no. 8-9 (2009): 907–15. http://dx.doi.org/10.2298/jsc0909907c.

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Mn(II) and Co(II) complexes having the general composition [M(L)2X2] (where L = 2-pyridinecarboxaldehyde thiosemicarbazone, M = Mn(II) and Co(II), X = Cl- and - NO3 ) were synthesized. All the metal complexes were characterized by elemental analysis, molar conductance, magnetic susceptibility measurements, mass, IR, EPR, electronic spectral studies and thermogravimetric analysis (TG). Based on the spectral studies, an octahedral geometry was assigned for all the complexes. Thermal studies of the compounds suggest that the complexes are more stable than the free ligand. This fact was supported

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40

A. El-Boraey, Hanaa, Azza A. Serag El-Din, and Ahmed A. Sakr. "Synthesis, Spectral Characterization, Thermal and In vitro Antimicrobial Studies for Novel Co(II) and Ni(II) Complexes of (N,N'-(1,2-Phenylene)Bis(2-Aminobenzamide)." JOURNAL OF ADVANCES IN CHEMISTRY 16 (April 30, 2019): 5360–74. http://dx.doi.org/10.24297/jac.v16i0.8264.

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Novel metal complexes of Co(II) and Ni(II) have been prepared from reaction of their different salts with previously prepared ligand (L) namely (N,N'-(1,2-phenylene)bis(2-aminobenzamide). Synthesis ligand and its metal (II) complexes (1-5) were reported and characterized with the help of analytical and physiochemical analysis as elemental, IR spectra, thermal (TG/DTG), UV-Vis, magnetic susceptibility and molar conductance in DMF, On the view of the previous data and measurements, the structure and composition species behave as mononuclear and octahedral geometry has been proposed for all the c

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41

D., C. Dash, Mahapatra A., Jena P., and B. Patjoshi S. "Synthesis of complexes of 2-(benzooxazolyl-2-aminoimino)- 1,2-diphenylethanone with some bivalent transition metal ions." Journal of Indian Chemical Society Vol. 79, Apr 2002 (2002): 339–41. https://doi.org/10.5281/zenodo.5841051.

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Department of Chemistry, Sambalpur University, Jyoti Vihar, Burla-768 019, India <em>E-mail</em> : dcdash@rediffmail.com <em>Manu.fcr!pl received 18 October 2000. revised 26 July 2001, accepted 15 September 2001</em> A series of metal complexes having composition [M(BOAIDE)(H<sub>2</sub>O)<sub>3</sub>]CI and [M(BOAIDE)L3]CI, where HBOAIDE is a Schiff base ligand, derived from 2-hydrazinobenzooxazole and benzil, M = Co<sup>ll</sup>, Cu<sup>II</sup>, Ni<sup>ll</sup>, and L = pyridine or picoline(α,β,&upsih;) have been  synthesized. The ligand acts as a monobasic trident

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42

Kishor, Arora, C. Goyal R., D. Agarwal D. та C. Pathak M. "Synthesis and spectral studies of thorium( IV) and dioxouranium(V) metal complexes with Schiff base ligandΨ". Journal of Indian Chemical Society Vol. 79, Aug 2002 (2002): 686–88. https://doi.org/10.5281/zenodo.5843399.

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Department of Chemistry, Government Autonomous K. R. G. College, Gwalior-474 001, India <em>E-mail : </em>kishorarora@rediffmail.com Department of Chemistry, Government P. G. College, Morena-476 001, India School of Studies in Chemistry, Jiwaji University, Gwalior-474 011, India Department of Chemistry, Government Autonomous Science College, Gwalior, India <em>Manuscript received 9 August 2001, revised 9 January 2002, accepted 5 April 2002</em> A series of new complexes of Schiff base 2-bromo-1<em>N</em>[4-N,N-bis(2'-cynoethylaminobenzalidene)Jaminobenzene (BCABAB) have been prepared from

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43

Liang, Guogang, Nicolas A. Corfù, and Helmut Sigel. "Influence of Decreasing Solvent Polarity (Dioxane-Water Mixtures) on the Stability of Metal Ion Complexes Formed with Phosphate Monoesters." Zeitschrift für Naturforschung B 44, no. 5 (1989): 538–42. http://dx.doi.org/10.1515/znb-1989-0506.

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The acidity constants of H(R-MP)-, where R-MP2- = 4-nitrophenyl phosphate (NPhP2-), phenyl phosphate (PhP2-) and D-ribose 5′-monophosphate (RibMP2-), and the stability constants of the binary Cu(R-MP) complexes were determined by potentiometric pH titrations in aqueous solution and in 20, 30, 40 and 50% (v/v) dioxane-water mixtures. The solvent influence on the corresponding equilibrium constants is compared with the same influence on previously studied systems containing uridine 5′-triphosphate, formate or acetate. The influence of the solvent composition on the various ligand (L) systems was

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44

Onik, Marjan Hossain, Ahnaf Bin R. Q. Khan, Mahjabin Tarannum Nabila, Fatema, and M. Q. Ehsan. "Spectroscopic and Electrochemical Studies of Interaction of Cu(II) Ion with Different Aliphatic and Aromatic Amine Based Ligands in Aqueous Solutions." Dhaka University Journal of Science 72, no. 2 (2024): 61–67. http://dx.doi.org/10.3329/dujs.v72i2.75472.

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The composition and stability constant of the complexes of copper(II) with the ligands 2,2 –bipyridine, 1,10-phenanthroline, saccharin, and ethylenediamine tetraacetic acid (EDTA),were determined, as well as the effect of temperature on the thermodynamic parameters were studied. The metal-to-ligand ratio in the EDTA complex is found 1:1 and in the rest of the cases, the ratio is 1:2. The redox behavior of the Cu (II) / Cu (0) system in the Cu-ligand complex has been studied in KCl solution as a supporting electrolyte. The redox process of the Cu (II) / Cu (0) system in the Cu-sac complex is al

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45

Topkaya, Cansu. "Experimental biological studies of novel tetradentate hydrazone Cu(II) complexes for potential applications in medicinal chemistry." Macedonian Journal of Chemistry and Chemical Engineering 43, no. 1 (2024): 127–36. http://dx.doi.org/10.20450/mjcce.2024.2751.

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A series of mononuclear Cu(II) complexes were synthesized using a potential tetradentate hydrazone ligand obtained from the reaction between phenylhydrazine groups and 2,5-thiophenedicarboxaldehyde. The structures of ligands and complexes were elucidated through various spectroscopic techniques, confirming their composition. All complexes were found to adopt four-coordinated geometries, indicating the formation of stable structures. Spectroscopic analysis revealed that the hydrazone ligand coordinated with the Cu(II) metal ions as a dibasic tetradentate ligand by utilizing the phenolic oxygen

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46

Lone, Mohsin Yousuf, and Prakash Chandra Jha. "Quantum Chemical Study of Mixed-Ligand Monometallic Ruthenium(II) Complex of Composition [(bpy)2Ru(H3Imbzim)](ClO4)2·2H2O." Journal of Quantum Chemistry 2014 (May 19, 2014): 1–8. http://dx.doi.org/10.1155/2014/149380.

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On the basis of density functional theoretical approach, we have assessed the ground state geometries and absorption spectra of recently synthesized monometallic ruthenium (II) complex of composition [(bpy)2Ru(H3Imbzim)](ClO4)2·2H2O where bpy = 2,2′-bypyridine and H3Imbzim = 4,5-bis(benzimidazol-2-yl)imidazole. The all different kinds of charge transfers such as ligand-ligand, and metal-ligand have been quantified, compared, and contrasted with the experimental results. In addition, the effect of solvent on excitation energies has been evaluated. In spite of some digital discrepancies in calcu

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47

Rehbock, Christoph, Jurij Jakobi, Lisa Gamrad, et al. "Current state of laser synthesis of metal and alloy nanoparticles as ligand-free reference materials for nano-toxicological assays." Beilstein Journal of Nanotechnology 5 (September 12, 2014): 1523–41. http://dx.doi.org/10.3762/bjnano.5.165.

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Due to the abundance of nanomaterials in medical devices and everyday products, toxicological effects related to nanoparticles released from these materials, e.g., by mechanical wear, are a growing matter of concern. Unfortunately, appropriate nanoparticles required for systematic toxicological evaluation of these materials are still lacking. Here, the ubiquitous presence of surface ligands, remaining from chemical synthesis are a major drawback as these organic residues may cause cross-contaminations in toxicological studies. Nanoparticles synthesized by pulsed laser ablation in liquid are a

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48

Tai, Xi Shi, Peng Fei Li, and Li Li Liu. "Preparation, Characterization, and Catalytic Property of a Cu(II) Complex with 2-Carboxybenzaldehyde-p-Toluenesulfonyl Hydrazone Ligand." Bulletin of Chemical Reaction Engineering & Catalysis 13, no. 1 (2018): 7. http://dx.doi.org/10.9767/bcrec.13.1.1012.7-13.

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Metal-organic complex hybrid materials constructed from carboxylate ligands and hydrazone ligands have exhibited potential application in many fields. In order to enrich the applications of the metai-organic complex materials, a new hydrazone ligand contains carboxylate group, 2-carboxybenzaldehyde-p-toluenesulfonyl hydrazone (L1), and its Cu(II) complex (C2), have been prepared. The structure of L1 was determined by elemental analysis, IR spectra and single crystal X-ray diffraction, and the composition of Cu(II) complex (C2) has also been determined by elemental analysis, IR and UV spectra.

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49

Lawal, Sulaiman Oladipo, and Masakoto Kanezashi. "A Brief Overview of the Microstructural Engineering of Inorganic–Organic Composite Membranes Derived from Organic Chelating Ligands." Membranes 13, no. 4 (2023): 390. http://dx.doi.org/10.3390/membranes13040390.

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This review presents a concise conceptual overview of membranes derived from organic chelating ligands as studied in several works. The authors’ approach is from the viewpoint of the classification of membranes by matrix composition. The first part presents composite matrix membranes as a key class of membranes and makes a case for the importance of organic chelating ligands in the formation of inorganic–organic composites. Organic chelating ligands, categorized into network-modifying and network-forming types, are explored in detail in the second part. Four key structural elements, of which o

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50

El-Tabl, Abduo S., M. M. Abd-El Wahed, and M. A. Wahba. "Spectroscopic characterization and cytotoxic activity of new metal complexes derived from (1E, N'Z, N'Z)-N',N'-bis(2-hydroxybenzylidene)-2-(naphthalen-1-yloxy) acetohydrazonohydrazide." JOURNAL OF ADVANCES IN CHEMISTRY 11, no. 9 (2015): 3888–918. http://dx.doi.org/10.24297/jac.v11i9.2681.

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Spectroscopic (IR, 1H-NMR, UV-visible, mass and ESR spectra) and structural studies of the ligand (1E, N'Z, N'Z)-N', N'-bis (2-hydroxybenzylidene)-2-(naphthalen-1-yloxy) acetohydrazonohydrazide (H2L) and its metal complexes are reported. The magnetic properties and thermal analyses (DTA and TGA) were also carried out. The IR spectra of the prepared complexes suggested that, the ligand adopted either a bidentate or a tetradentate fashion, bonding to the metal ion through the azomethine nitrogens and the two phenolic oxygen atoms (ONNO). Electronic spectra and magnetic susceptibility measurement

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