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Journal articles on the topic 'Transition metal chelates'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Jaeger, David A., Robin Jose, Alvaro Mendoza, and Robert P. Apkarian. "Surfactant transition metal chelates." Colloids and Surfaces A: Physicochemical and Engineering Aspects 302, no. 1-3 (2007): 186–96. http://dx.doi.org/10.1016/j.colsurfa.2007.02.021.

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2

Sasikala T, Greeshma KP, Gnana Priya K, Muthulingam S, and Nandhakumar C. "Synthesis, characterization and chelating properties of tannin-8-hydroxy quinoline - formaldehyde polymer." GSC Advanced Research and Reviews 5, no. 2 (2020): 019–23. http://dx.doi.org/10.30574/gscarr.2020.5.2.0083.

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Tannin obtained from Eucalyptus plant, condensed with formaldehyde and then 8-hydroxy quinoline. The so called obtained polymer designated as TFQ was used for metal chelate formation. Thus Transition metal chelates of TFQ with Zn+2, Co+2, Cu+2, Ni+2 and Mn+2 metal ions were prepared. The ligand TFQ and its all five metal chelates were characterized by nitrogen content, IR, UV-Visible spectral studies, magnetic moments and thermogravimetry. The antimicrobial activity of all the samples has also been monitored against common microbes.

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3

Sasikala, T., KP Greeshma, Priya K. Gnana, S. Muthulingam, and C. Nandhakumar. "Synthesis, characterization and chelating properties of tannin-8-hydroxy quinoline - formaldehyde polymer." GSC Advanced Research and Reviews 5, no. 2 (2020): 019–23. https://doi.org/10.5281/zenodo.4319550.

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Tannin obtained from Eucalyptus plant, condensed with formaldehyde and then 8-hydroxy quinoline. The so called obtained polymer designated as TFQ was used for metal chelate formation. Thus Transition metal chelates of TFQ with Zn<sup>+2</sup>, Co<sup>+2</sup>, Cu<sup>+2</sup>, Ni<sup>+2</sup> and Mn<sup>+2</sup> metal ions were prepared. The ligand TFQ and its all five metal chelates were characterized by nitrogen content, IR, UV-Visible spectral studies, magnetic moments and thermogravimetry.   The antimicrobial activity of all the samples has also been monitored against c

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4

Varshney, Anshita, and A. P. Mishra. "Novel Ni(II) and Zn(II) Schiff base metal chelates as promising DNA binder, Antioxidant and Antifungal agents." Mediterranean Journal of Chemistry 14, no. 2 (2024): 94. http://dx.doi.org/10.13171/mjc02405211777varshney.

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<p>Schiff base ligands and their 3d-metal chelates have gained significant attention due to various applications in various scientific platforms. Due to their chelating propensity, they possess a wide range of biological, biochemical, catalytic, clinical, dying, and pharmacological properties.<strong> </strong>Here, in present studies,<strong> </strong>two novel Ni(II) and Zn(II) transition metal chelates have been synthesized by condensing their metal salts with Schiff base ligand 4-chloro-2-(2,5-dimethoxybenzylideneamino)-5-nitrophenol<strong> </strong&

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5

T., M. Bhagat, and P. Rathod S. "Synthesis Of Transition Metal Complexes With Newly Synthsised Chelates And Its Effect On Seed Germination." International Journal of Advance and Applied Research S6, no. 18 (2025): 83–86. https://doi.org/10.5281/zenodo.15254800.

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<em>Newly synthesized heterocyclic compound act as a chelating agent. It is also proved, the metal chelates have drug activity and some metal chelates acts as plant growth regulator. Hence we have synthesizes </em><em>2-(2’-hydroxy-3’-methoxy phenyl)-4- nitro-6-chloro benzothiazolyl hydrazones </em><em>and check the chelating tendency of newly synthesized heterocyclic compound. </em><em>2-(2’-hydroxy-3’-methoxy phenyl)-4- nitro-6-chloro benzothiazolyl hydrazones </em><em>were treated with metal ions like Ni++, Cu++, Zn++ at different PH and different laboratory conditio

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6

Smentek, Lidia, and B. Andes Hess. "Conformational Analysis of Eu(III)-(Ethylenedinitrilo)tetrakis(methylphosphonates) (EDTMP)." Collection of Czechoslovak Chemical Communications 73, no. 11 (2008): 1437–56. http://dx.doi.org/10.1135/cccc20081437.

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The optimal geometries obtained from DFT calculations are presented for Eu(III)-EDTMP (the parent system) and cages associated with the water molecules and carbonate and hydroxide ions. The numerical results demonstrate the existence of two conformers of each cage, which might explain the observation of two spectroscopic lines previously assigned to the electric dipole transition 7F0 ↔ 5D0 of Eu3+. It is also found that the water molecules are associated with the chelate via hydrogen bonds with the oxygens of the phoshonate arms, while the carbonate and hydroxide ions are chelated with the lan

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7

B., K. DWIVEDI, and N. SRIVASTAVA I. "Transition Metal Schiff Base Chelates as Ligands towards Tin(ll) Halides and -lsothiocyanate." Journal of Indian Chemical Society Vol. 62, Mar 1985 (1985): 246–49. https://doi.org/10.5281/zenodo.6302589.

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Department of Chemistry, B. S, N.<em> </em>V. Degree College, Lucknow Department of Chemistry, Lucknow University, Lucknow-228007 <em>Manuscript received 21 March 1984, reputed 16 October 1984, </em><em>accepted 15 'ebruary 1985</em> Transition Metal Schiff Base Chelates as Ligands towards Tin(ll) Halides and -lsothiocyanate.

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8

Patel, S. N., and Y. S. Patel. "Preparation, Characterization and Antifungal Activity of Metal Chelates of 5-[2-{2-(4-fluorophenyl)-5-nitro-1H-imidazol-1-yl}ethoxy]methyl-8-hydroxyquinoline." Research Journal of Chemistry and Environment 27, no. 4 (2023): 26–32. http://dx.doi.org/10.25303/2704rjce026032.

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5-chloromethyl-8-hydroxyquinoline (CMQ) hydro-chloride is reacted with flunidazole to yield a novel ligand namely 5-(flunidazoylmethyl)-8-hydro-xyquinoline (FHQ). The transition metal chelates of FHQ ligand were prepared using Cu2+, Co2+, Ni2+, Mn2+, Zn2+ and Cd2+ metal salts. The ligand FHQ and its all metal chelates were duly characterized for elemental content, spectral features, M: L (metal: ligand) ratio and magnetic moment. Antifungal activity of all the samples was tested against plant pathogens.

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9

B., ANANDAM, and LINGAIAH P. "A Study on Metal Chelates of Substituted Hydroxyphenylpyrazoles with some Bivalent Transition Metal Ions." Journal of Indian Chemical Society Vol. 70, Jan 1993 (1993): 8–10. https://doi.org/10.5281/zenodo.5902578.

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Department of Chemistry, C. K. M. Arts and Science College, Warangal-506 009 Department of Chemistry, Kakaliya University, Warangal-506 009 <em>Manuscript received 2 September 1991, revised 1 September 1992, accepted 17 September 1992</em> The stability constants of metal chelate & of substituted hydroxyphenylpyrazoles, viz. 3(5)-(2· hydroxyphenyl)· -(3)-phenylpyrazole (OHPPPz), 3(5)<em>·</em>(2·hydroxyphenl)-5(3)-(4·chlororphenl) pyrazole (OHPCPPz) and 3·(2-bydroxyphenyl)-1 ,5-diphenylpyrazole (OHPDPPz) with Co<sup>II</sup> Ni<sup>II</sup>. C

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10

Hamil, Abdusalam, Marei El-ajaily, Lila Basher, Asma Ramli, Miloud Miloud, and S. A. Saad. "Mixed ligand chelates using Schiff base and 2-aminobenzoic acid as ligands." Libyan Journal of Medical Research 18, no. 1 (2024): 1–17. http://dx.doi.org/10.54361/10.26719/llmr18-1.01.

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The ligands under investigation were used to form five mixed ligand chelates with some transition metal ions. The ligands and their chelates were offered to several analytical and spectroscopic tools. Based on the obtained results; an octahedral structure was proposed for all the chelates. Also, the antibacterial activity was tested on two types of bacteria; Staphylococcus aureus and E.coli species.

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11

Li, Zhongjing, Timothy W. Yokley, Sheila L. Tran, Jie Zong, Nathan D. Schley, and Timothy P. Brewster. "Synthesis and characterization of rhodium–aluminum heterobimetallic complexes tethered by a 1,3-bis(diphenylphosphino)-2-propanoxy group." Dalton Transactions 48, no. 24 (2019): 8782–90. http://dx.doi.org/10.1039/c9dt00938h.

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We demonstrate the synthesis and characterization of a new class of late transition metal-aluminum heterobimetallic complexes. A bridging ligand which both chelates the transition metal and binds the aluminum via an alkoxide was employed to impart stability to the bimetallic system.

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12

Vashi, R. T., C. D. Shelat, and Himanshu Patel. "Synthesis, Spectroscopic Studies and Antifungal Activity of 2-[(4(3-Chlorophenyl) piperazine-1-yl)methyl]-3-[8-hydroxy quinolin-5-yl]-3(H)-quinazolin-4-one Ligand and its Chelates." E-Journal of Chemistry 7, s1 (2010): S163—S168. http://dx.doi.org/10.1155/2010/701409.

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The novel ligand HL6was synthesized using anthranilic acid and it was undergo the chelating reaction with Cu(II), Ni(II), Co(II), Mn(II) and Zn(II) to prepare transition metal chelates. These chelates were characterized by physicochemical methods such as elemental analysis, conductometric studies, magnetic susceptibility, FT-IR, NMR and electronic spectra. The stoichiometry of the complexes has been found to be 1: 2 (Metal: ligand). An octahedral geometry around Co(II), Ni(II) and Mn(II), distorted octahedral geometry around Cu(II) and tetrahedral geometry around Zn(II) have been proposed. The

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13

Siddiqi, K. S., N. Nishat, and Fouzia Rafat. "Novel N4 Macrocycles and Their Transition Metal Chelates." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 33, no. 10 (2003): 1835–55. http://dx.doi.org/10.1081/sim-120026552.

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14

Rakha, T. H. "Transition Metal Chelates Derived from Potassium Nicotinoyldithiocarbazate (KHNDC)." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 30, no. 2 (2000): 205–24. http://dx.doi.org/10.1080/00945710009351758.

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15

Marciniak, Bronislaw, and Gonzalo E. Buono-Core. "Photochemical properties of 1,3-diketonate transition metal chelates." Journal of Photochemistry and Photobiology A: Chemistry 52, no. 1 (1990): 1–25. http://dx.doi.org/10.1016/1010-6030(90)87085-p.

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16

Ahmed, Ayman H. "Zeolite-encapsulated transition metal chelates: synthesis and characterization." Reviews in Inorganic Chemistry 34, no. 3 (2014): 153–75. http://dx.doi.org/10.1515/revic-2013-0013.

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AbstractThis article reviews some important recent works on the synthesis and characterization of zeolite-encapsulated transition metal complexes containing different organic ligands. Distinct methodologies of preparation, including the in situ one-pot template (IOPT) and flexible ligand methods (FLM) are described. The mode of bonding, composition, overall geometry and surface characteristics have been inferred by various physicochemical characterization techniques. Chemical analysis, spectroscopic methods [Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS

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17

Zhu, Congqing, Caixia Yang, Yongheng Wang, et al. "CCCCC pentadentate chelates with planar Möbius aromaticity and unique properties." Science Advances 2, no. 8 (2016): e1601031. http://dx.doi.org/10.1126/sciadv.1601031.

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The coordinating atoms in polydentate chelates are primarily heteroatoms. We present the first examples of pentadentate chelates with all binding atoms of the chelating agent being carbon atoms, denoted as CCCCC chelates. Having up to five metal-carbon bonds in the equatorial plane has not been previously observed in transition metal chemistry. Density functional theory calculations showed that the planar metallacycle has extended Craig-Möbius aromaticity arising from 12-center–12-electron dπ-pπ π-conjugation. These planar chelates have broad absorption in the ultraviolet-visible–near-infrared

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18

A., S. ASWAR, and N. MUNSHI K. "Preparative, Structural and Thermal Studies on some Chelate Polymers." Journal of Indian Chemical Society Vol. 69, Sep 1992 (1992): 544–46. https://doi.org/10.5281/zenodo.6004893.

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Department of Chemistry, Nagpur University, Nagpur-140 010 <em>Manuscript received 4 November 1991, revised 26 May 1992, accepted 1 July 1992</em> Chelate polymers of bivalent Mn, Co, Ni, Cu and Zn have been prepared from bis-mercaptoacetamide ethylenediamine (BMAED). The analytical data agree with 1 : 1 metal-ligand stoichiometry. Elemental analysis, magnetic, spectral and thermal properties of polycbelates have been studied and probable structures are assigned to the chelate polymers. All the chelates are amorphous powders, insoluble in common organic solvents. The sequence of thermal stabil

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19

Lomozová, Zuzana, Václav Tvrdý, Marcel Hrubša, et al. "Dehydroflavonolignans from Silymarin Potentiate Transition Metal Toxicity In Vitro but Are Protective for Isolated Erythrocytes Ex Vivo." Antioxidants 10, no. 5 (2021): 679. http://dx.doi.org/10.3390/antiox10050679.

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2,3-Dehydrosilybin (DHS) was previously shown to chelate and reduce both copper and iron ions. In this study, similar experiments with 2,3-dehydrosilychristin (DHSCH) showed that this congener of DHS also chelates and reduces both metals. Statistical analysis pointed to some differences between both compounds: in general, DHS appeared to be a more potent iron and copper chelator, and a copper reducing agent under acidic conditions, while DHSCH was a more potent copper reducing agent under neutral conditions. In the next step, both DHS and DHSCH were tested for metal-based Fenton chemistry in v

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20

Joyner, Jeff C., Kevin D. Keuper, and J. A. Cowan. "DNA nuclease activity of Rev-coupled transition metal chelates." Dalton Transactions 41, no. 21 (2012): 6567. http://dx.doi.org/10.1039/c2dt00026a.

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21

Suryawanshi, N. J., G. B. Pethe, A. R. Yaul, and A. S. Aswar. "Transition metal chelates: Synthesis, physicochemical, thermal, and biological studies." Russian Journal of General Chemistry 86, no. 4 (2016): 901–6. http://dx.doi.org/10.1134/s1070363216040241.

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22

M. Mikulski, Chester, James Fleming, Deborah Fleming, and Nicholas M. Karayannis. "Chelates of tetracycline with first row transition metal perchlorates." Inorganica Chimica Acta 144, no. 1 (1988): 9–16. http://dx.doi.org/10.1016/s0020-1693(00)80959-7.

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23

Van Der Putten, A., A. Elzing, W. Visscher, and E. Barendrecht. "Oxygen reduction on pyrolysed carbon-supported transition metal chelates." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 205, no. 1-2 (1986): 233–44. http://dx.doi.org/10.1016/0022-0728(86)90234-2.

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24

G, P. SENGUPTA, R. BERA C., and N. GHOSH N. "Stability Constants of some Bivalent transition Metal Chelates of Salicylidene Sulpbanilamide." Journal of Indian Chemical Society Vol. 64, Feb 1987 (1987): 117–18. https://doi.org/10.5281/zenodo.6201154.

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Department of Chemistry Visha-Varathi University, Shantiniketan -731 235 <em>Manuscript received 20 march 1986, revised 18 November 1986, accepted 3 January 1987</em> Stability Constants of some Bivalent transition Metal Chelates of Salicylidene Sulpbanilamide  

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25

Verma, Aradhana, S. A. Iqbal, Arun Singh, and Liviu Mitu. "Synthesis, Characterisation, Spectral and Microbial Studies of Transition Metal Complexes of the Drug, Secnidazole." E-Journal of Chemistry 7, s1 (2010): S520—S526. http://dx.doi.org/10.1155/2010/904205.

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5-Chloromethyl-8-quinolinol hydrochloride was condensed with 1-(2-methyl-5-nitro-1H-imidazol-1-yl)propan-2-ol in presence of potassium carbonate. The resulting 5-((1-(2-methyl-5-nitro-1H-imidazol-1-yl)propan-2-yloxy)methyl)quinolin-8-ol was characterized by elemental analysis and spectral studies. The transition metal chelates of the same were prepared with Cu2+, Ni2+, Co2+, Mn2+and Zn2+and characterized by IR and electronic spectral studies and magnetic properties. The antimicrobial activity of ligand and its metal chelates were screened against various gram positive and gram negative organis

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26

Shelat, C. D., and R. T. Vashi. "Synthesis, Characterization, Chelating Properties and Anti-Fungal Activity of 2-(4-Phenylpiperazinyl) Methyl-3-(8-Quinolinol-5-YL)- 4(3H)-Quinazolinone." E-Journal of Chemistry 2, no. 1 (2005): 86–90. http://dx.doi.org/10.1155/2005/973414.

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A new quinazolinone derivative namely 2-(4-phenylpiperazinyl)methyl-3-(8-quinolinol-5-yl)- 4(3h)-quinazolinone(HL) was prepared and characterized. Various transition metal (Cu2+, Co2+, Ni2+, Zn2+, Mn2+) chelates of HL were prepared and characterized by metal ligand (M:L) ratio, IR and reflectance spectral studies, magnetic moment, and antimicrobial activity.

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27

Hossain, Md Jamal, Mohammad A. Rashid, and Md Zakir Sultan. "Transition Metal Chelation Augments the Half-life of Secnidazole: Molecular Docking and Fluorescence Spectroscopic Approaches." Drug Research 70, no. 12 (2020): 583–92. http://dx.doi.org/10.1055/a-1252-2322.

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AbstractThis current research aimed to establish the most required pharmacodynamics parameters of two transition metal complexes of an antimicrobial drug secnidazole. The spectroscopic fluorescence quenching strategy was outlined to evaluate the binding mechanism and binding affinity of nickel (II) and chromium (III) complexes of secnidazole with bovine serum albumin (BSA). The conformational modifications and the interacting patterns of the protein due to the interaction of the parent compound of the metal complexes have been investigated by molecular docking approach. The ligand-protein inte

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28

Babu, Ramavath, Govindugari Bhargavi, and Melath V. Rajasekharan. "Polybromides of Transition Metal Chelates – Synthesis, Structure and Spectral Properties." ChemistrySelect 6, no. 14 (2021): 3487–99. http://dx.doi.org/10.1002/slct.202004395.

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29

V., T. Chaudhari, and Farooqui Mazahar. "Chemical equilibrium studies on some bivalent transition metal chelates of biologically active molecules (drugs)." Journal of Indian Chemical Society Vol. 86, Feb 2009 (2009): 166–67. https://doi.org/10.5281/zenodo.5807510.

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S.S.M.M. Arts, Science & Commerce College, Pachora, Dist. Jalgaon, Maharashtra, India Aurangabad College for Women, Navkhanda, Aurangabad, Maharashtra, India <em>E-mail </em>: Mazahar_64@rediffmail.com. <em>Manuscript received 27 May 2008, revised 22 September 2008, accepted 25 September 2008</em> Stability constants of metal chelates of dicyclomine hydrochloride (dcm), metformin hydrochloride (mfm) drugs with the Co<sup>II</sup>, Ni<sup>II</sup> and Cu<sup>II</sup> transition metal ions have been evaluated pH metrically in aqueous solution at 25 °C and 0.1 <em>M </em>(NaCIO<

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30

Leßmann, Frank, Lothar Beyer, Rainer Richter, and Reinhard Meusinger. "N-Benzoylthiocarbamoyl Amino Acid Ethyl Esters as Chelate Ligands for Transition Metal Ions." Zeitschrift für Naturforschung B 53, no. 9 (1998): 981–90. http://dx.doi.org/10.1515/znb-1998-0909.

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Abstract The reactions of benzoyl isothiocyanate with amino acid ethyl esters (N-butyl glycine ethyl ester, (S)-(-)-proline ethyl ester) give N-benzoylthiocarbamoyl amino acid ethyl esters. Apart from the expected N-benzoylthiocarbamoyl (S)-(-)-proline ethyl ester the racemic N-benzoyl thiocarbamoyl (R)/(S)-proline ethyl ester is formed because of base catalyzed racemization of the educt (S)-(-)-proline ethyl ester during the reaction of (S)-(-)-proline ethyl ester hydrochloride with triethylamine. The structures of both compounds were established by X-ray crystal structure analysis and speci

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31

Deshmukh, Suparna. "Studies on Precision and Accuracy In Microdetermination of Transition Metals Using Ternary Complex EAB-CTAB-Metals." Oriental Journal of Chemistry 34, no. 4 (2018): 1930–36. http://dx.doi.org/10.13005/ojc/3404029.

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Complexometric and Analytical studies have carried out by forming ternary complex between Eriochrome Azurol B, and Cetyl Trimethyl Ammonium Bromide CTAB; and some transition metal ions mainly Cu2+, Ni2+ and Cd2+. The absorption spectra of Eriochrome Azurol B ,EAB; a triphenylmethane dye, has studied in the presence as well as in the absence of surfactant, Cetyl Trimethyl Ammonium Bromide, CTAB at pH values ranging from pH 1.00 to 12.00. Hypsochromic shift is observed in the absorption spectra in the presence of surfactant pK values i.e. dissociation constant values are found to decreased, in t

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32

Prananto, Yuniar P., Aron Urbatsch, Boujemaa Moubaraki, et al. "Transition Metal Thiocyanate Complexes of Picolylcyanoacetamides." Australian Journal of Chemistry 70, no. 5 (2017): 516. http://dx.doi.org/10.1071/ch16648.

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A variety of transition metal complexes involving picolylcyanoacetamides (pica = NCCH2CONH-R; R = 2-picolyl- (2pica), 3-picolyl- (3pica), 4-picolyl- (4pica)) and thiocyanate have been synthesised and their solid-state structures have been determined. The complexes were all obtained from reactions between the corresponding metals salts and pica ligands with sodium thiocyanate under ambient conditions. Both 3pica and 4pica coordinate to the metal solely through the nitrogen atom of the picolyl group and form discrete tetrahedral [M(NCS)2(pica)2] (3pica; M = Mn, Zn; 4pica; M = Co) and octahedral

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33

Brückner, Christian, Veranja Karunaratne, Steven J. Rettig, and David Dolphin. "Synthesis of meso-phenyl-4,6-dipyrrins, preparation of their Cu(II), Ni(II), and Zn(II) chelates, and structural characterization of bis[meso-phenyl-4,6-dipyrrinato]Ni(II)." Canadian Journal of Chemistry 74, no. 11 (1996): 2182–93. http://dx.doi.org/10.1139/v96-245.

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meso-Phenyldipyrromethanes can be oxidized by 2,6-dicyano-3,5-dichloro-para-benzoquinone (DDQ) to the corresponding meso-phenyldipyrrins. As expected, these novel, stable bipyrrolic pigments readily form metal chelates with copper(II), nickel(II), and zinc(II). Their UV–VIS spectra are compared with a series of known alkyl-substituted dipyrrin chelates and, based on the UV–VIS spectral analysis, the dihedral angle between the two ligands in the bis[meso-phenyldipyrrinato]Ni(II) complex was calculated to be 42°. The molecular structure of this complex was determined by X-ray crystallography, es

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34

van der Putten, A., A. Elzing, W. Visscher, and E. Barendrecht. "Redox potential and electrocatalysis of O2 reduction on transition metal chelates." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 221, no. 1-2 (1987): 95–104. http://dx.doi.org/10.1016/0022-0728(87)80248-6.

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35

STRUBE, A., G. HUTTNER, and L. ZSOLNAI. "ChemInform Abstract: Transition-Metal Stabilized As(I) and Sb(I) Chelates." ChemInform 22, no. 10 (2010): no. http://dx.doi.org/10.1002/chin.199110247.

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36

Soliman, Ezzat M., and Aly M. A. Hassaan. "Transition Metal Complexes of Alizarin Yellow R, Its Mixed Ligand and Mixed Metal Chelates." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 24, no. 2 (1994): 255–65. http://dx.doi.org/10.1080/00945719408000108.

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37

Baek, Won-Ok, Karsten Haupt, Carole Colin, and Mookambeswaran A. Vijayalakshmi. "Immobilized metal ion affinity gel electrophoresis: Quantification of protein affinity to transition metal chelates." Electrophoresis 17, no. 3 (1996): 489–92. http://dx.doi.org/10.1002/elps.1150170310.

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38

Hassaan, Aly M. A., and Mohamed A. Khalifa. "Metal chelates of some transition and non-transition metal ions with Schiff base derived from isatin witho-phenylenediamine." Monatshefte f�r Chemie Chemical Monthly 124, no. 8-9 (1993): 803–8. http://dx.doi.org/10.1007/bf00816402.

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39

Patra, Debprasad, Poulami Pattanayak, Jahar Lal Pratihar, and Surajit Chattopadhyay. "Synthesis, structure and properties of delocalized transition metal chelates: Diazoketiminato chelates of Co(III) and Pt(II)." Polyhedron 26, no. 18 (2007): 5484–90. http://dx.doi.org/10.1016/j.poly.2007.08.029.

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40

Chohan, Zahid H. "Biologically Active Transition Metal Chelates of Ni(II), Cu(II) and Zn(II) With 2-Aminothiazole-Derived Schiff-bases: Their Synthesis, Characterization and the Role of Anions (NO3 , SO42− , C2O42- and CH3CO2− ) on Their Antibacterial Properties." Metal-Based Drugs 6, no. 3 (1999): 187–92. http://dx.doi.org/10.1155/mbd.1999.187.

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Biologically active nickel(ll), copper(ll) and zinc(ll) chelates with thiazole-derived nitro- and chlorosalicylaldehyde Schiff-bases having the same metal ion but different anions, e.g. nitrate, sulfate, oxalate and acetate have been synthesized and characterized on the basis of their physical, spectral and analytical data. In order to evaluate the possible participating role of anions on the antibacterial properties, these ligands and their synthesized metal chelates with various anions have been screened against bacterial species Escherichia coli, Pseudomonas aeruginosa and Staphylococcus au

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41

P., Saritha Reddy, Satyanarayana B., and Jayatyagaraju. "Synthesis and structural studies on divalent transition metal complexes of 5-acetyl 2,4-dihydroxy acetophenone semicarbazone." Journal of Indian Chemical Society Vol. 83, Dec 2006 (2006): 1204–7. https://doi.org/10.5281/zenodo.5833184.

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Department of Chemistry, Osmania University College for Women, Osmania University, Hyderabad-500 095, India <em>E-mail </em>: abbareddysaritha@hotmail.com Department of Chemistry, University College of Engineering, Osmania University, Hyderabad-500 007, India   <em>E-mail</em> : satyambchem@yahoo. co .in; narayana satya 1969@yahoo .co. in   <em>Manuscript received 5 July 2006, revised 5 September 2006, accepted 5 September 2006</em> The synthesis of divalent transition metal complexes of a new dibasic, bis-chelating ligand 5-acetyl 2,4 dihydroxy acetophenone semicarbazone (H<sub>2</s

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42

Soundaranayaki, V., and A. Kulandaisamy. "Structural and Biological Studies on Transition Metal Complexes of 4-Aminoantipyrine Derivative." Asian Journal of Chemistry 32, no. 11 (2020): 2846–54. http://dx.doi.org/10.14233/ajchem.2020.22866.

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Novel tetra dentate Cu(II), Ni(II), Co(II), VO(II) and Zn(II) Schiff base complexes have been synthesized from salicylidene-4-iminoantipyrine and tyrosine. The synthesized Schiff base complexes was characterized by powder X-ray diffraction studies (XRD), scanning electron microscopy (SEM), FT-IR, ESR, 1H NMR, 13C NMR, UV-vis, molar conductance and magnetic susceptibility measurements. The general formula of complexes was confirmed as [ML] type [M = Cu(II), Co(II), Zn(II), Ni(II) and VO(II); L = C27H24N4O4]. Magnetic susceptibility, IR and UV-vis, spectral data showed that all the complexes hav

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43

Al-Radadi, Najlaa S., Ehab M. Zayed, Gehad G. Mohamed, and Hayam A. Abd El Salam. "Synthesis, Spectroscopic Characterization, Molecular Docking, and Evaluation of Antibacterial Potential of Transition Metal Complexes Obtained Using Triazole Chelating Ligand." Journal of Chemistry 2020 (February 24, 2020): 1–12. http://dx.doi.org/10.1155/2020/1548641.

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Mononuclear chelates of Ni(II), Co(II), Fe(III), Cd(II), and Cu(II) derived from triazole novel tridentate ligands were prepared and characterized by different spectroscopic methods. The metal to ligand ratio was 1 : 2, which was revealed by elemental analysis. All the complexes were electrolytic in nature as suggested by the conductivity measurements. IR pointed out that the coordination of the triazole ligand toward the metal ions was carried out through N amino and S thiophenolic atoms. The complexes were found to have octahedral geometry, and their thermal stability was also studied. The X

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P., Madhava Reddy, Venkata Ramana Reddy Ch., and Satyanarayana B. "Formation and stability of transition metal chelates with 2-(2-hydroxyphenyl) benzoxazole and other ligands." Journal of Indian Chemical Society Vol. 85, Jan 2008 (2008): 97–99. https://doi.org/10.5281/zenodo.5808584.

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Department of Chemistry, Chi tanya Bharathi Institute of Technology, Gandipet, Hyderabad-500 075, India <em>E-mail:</em> vrr9@yahoo.com Department of Chemistry, University College of Engineering, Osmania University, Hyderabad-500 007, India <em>Manuscript received 19 September 2007, accepted 27 September 2007</em> The formation equilibria of (1 : 1 and 1 : 2) binary chelates, ML and ML<sub>2</sub> and (1 : 1 : 1) ternary chelates, MAL where, M = Co<sup>II</sup> , Ni<sup>II</sup> and Zn<sup>II</sup> ; L = 2-(2-hydroxyphenyl)benzoxazole (HPBO) and A = glycine, alanine, proline and histidine have

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45

Patel, H. S., and K. K. Oza. "Synthesis, Characterization and Antimicrobial Activity of Metal Chelates of 5-[1(H)-Benzotriazole methylene]-8-quinolinol." E-Journal of Chemistry 6, no. 2 (2009): 371–76. http://dx.doi.org/10.1155/2009/243931.

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5-Chloromethyl-8-quinolinol was condensed stoichiometrically with benzotriazole in presence of potassium carbonate. The resulting 5-[1(H)-benzo triazole methylene]-8-quinolinol (BTMQ) was characterized by elemental analysis and spectral studies. The transition metal chelatesviz. Cu2+, Ni2+, Co3+, Mn2+and Zn2+of BTMQ were prepared and characterized by metal-ligand (M:L) ratio, IR and reflectance spectral studies and magnetic properties. The antifungal activity of BTMQ and its metal chelates was screened against various fungi. The results show that all these samples are good antifungal agents.

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PURUSHOTTAM, B. CHAKRAWARTI, and SHRIVASTAVA SARITA. "Study of Some Transition Metal Complexes of Amethopterin." Journal of Indian Chemical Society Vol. 62, Apr 1985 (1985): 265–68. https://doi.org/10.5281/zenodo.6324512.

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Chemical Laboratories, M. L. B. College, Bhopal-462 001 <em>Manuscript received 12 August 1983, revised 16 October 1984, accepted 27 April 1985</em> The avidity of amethopterin, 4-amino-N<sup>10</sup>-methylpteroylglutamic acid (AMPGA) for the ions of heavy metals. Mn<sup>II</sup>,Co<sup>II</sup>, Ni<sup>II</sup> and Cu<sup>II</sup>, have been measured and recorded in the form of stability constants and free energy changes, using Bjerrumcalvin pH titration technique as adopted by Irving and Rossotti at 35° and at various ionic strengths, <em>viz. </em>0.05, 0.1 and 0.2 <em>M </em

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47

Kurtoglu, Nurcan. "Synthesis, characterization, chelation with transition metal ions, and antibacterial and antifungal studies of the 4-[(E)- -phenyldiazenyl]-2-[(E)-(phenylimino)methyl]phenol dye." Journal of the Serbian Chemical Society 74, no. 8-9 (2009): 917–26. http://dx.doi.org/10.2298/jsc0909917k.

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New Ni(II), Cu(II) and Co(II) complexes were synthesized with the bidentate azo-azomethine dye, 4-[(E)-phenyldiazenyl]-2-[(E)-(phenylimino)methyl] phenol (dmpH), which was prepared by the reaction of 2-hydroxy-5-[(E)- phenyldiazenyl]benzaldehyde with aniline in EtOH. The syntheses of the metal chelates of the azo-azomethine dye were realized by the precipitation technique. The synthesized metal complexes were characterized by elemental analysis, molar conductance measurements, as well as infrared and UV-Vis spectral data. Based on these characterizations, the metal complexes of the transition

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Patel, I. J., and I. M. Vohra. "Synthesis, Characterization and Antimicrobial Activity of 5-(4-Methyl piperazinyl methylene)-8-hydroxy quinoline and its Various Metal Chelates." E-Journal of Chemistry 3, no. 3 (2006): 110–16. http://dx.doi.org/10.1155/2006/845653.

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5-Chloromethyl-8-quinolinol was condensed with 4-methyl piperazine in presence of sodium bicarbonate. The resulting 5-(4-methyl piper-azinylmethylene)-8-quinolinol (MPQ) was characterized by elemental analysis and spectral studies. The transition metal chelatesvizCu+2, Ni+2, Co+2, Mn+2, Zn+2, Cd+2, and Fe+3of MPQ were prepared and characterized by metal-ligand (M:L) ratio, IR and reflectance spectroscopies and magnetic properties. The antifungal activity of MPQ and its metal chelates was screened against various fungi. The results show that all these samples are good antifungal agents.

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Khajavali, S., A. Jayaraju, and J. Sreeramulu. "Synthesis, Characterization and Biological activities of 2-Amino-3-Methyl pyridine New Dithiocarbamate metal complexes." Journal of Drug Delivery and Therapeutics 9, no. 3-s (2019): 36–39. http://dx.doi.org/10.22270/jddt.v9i3-s.2742.

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Dithiocarbamates are a class of sulfur-based metal-chelating compounds with various applications in medicine. A new series of new transition metal [Cu(II), and Ni(II)] complexes of dithiocarbamates were synthesized from 2-Amino-3-Methyl pyridine and Carbon disulfide and further characterized. The investigation of these complexes confirmed that the stability of metal–ligands coordination through, S&S,N atoms as bidendate chelates.. It is necessary to understand the binding properties in developing new potential Protein targeting against neurological disorders. Keywords:2-Amino-3-Methylpyrid

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Patel, Divyesh K., and Arun Singh. "Synthesis, Characterization and Antimicrobial Activity of Metal Chelates of 5-[4-Chloro phenyl(1, 3, 4)thiadiazol-2-ylamino methylene]-8-hydroxy quinoline." E-Journal of Chemistry 6, no. 4 (2009): 1017–22. http://dx.doi.org/10.1155/2009/894156.

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5-Chloromethyl-8-quinolinol was condensed stoichiometrically with 5-(4-chlorophenyl)-(1,3,4) thiadiazol-2-ylamine in the presence of sodium bicarbonate. The resulting 5-[4-chlorophenyl-(1,3,4)thiadiazol-2-ylamino methylene]-8-quinolinol (CTAQ) was characterized by elemental analysis and spectral studies. The transition metal chelatesviz. Cu2+, Ni2+, Co2+, Mn2+and Zn2+of CTAQ were prepared and characterized by metal-ligand (M:L) ratio, IR and reflectance spectroscopies and magnetic properties. The antifungal activity of CTAQ and its metal chelates was screened against various fungi. The results

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