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Journal articles on the topic 'Metal complexes'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 July 2024

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1

Nabeshima, Tatsuya, Yusuke Chiba, Takashi Nakamura, and Ryota Matsuoka. "Synthesis and Functions of Oligomeric and Multidentate Dipyrrin Derivatives and their Complexes." Synlett 31, no. 17 (July 24, 2020): 1663–80. http://dx.doi.org/10.1055/s-0040-1707155.

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The dipyrrin–metal complexes and especially the boron complex 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) have recently attracted considerable attention because of their interesting properties and possible applications. We have developed two unique and useful ways to extend versatility and usefulness of the dipyrrin complexes. The first one is the linear and macrocyclic oligomerization of the BODIPY units. These arrangements of the B–F moieties of the oligomerized BODIPY units provide sophisticated functions, such as unique recognition ability toward cationic guest, associated with changes in the photophysical properties by utilizing unprecedented interactions between the B–F and a cationic species. The second one is introduction of additional ligating moieties into the dipyrrin skeleton. The multidentate N2Ox dipyrrin ligands thus obtained form a variety of complexes with 13 and 14 group elements, which are difficult to synthesize using the original N2 dipyrrin derivatives. Interestingly, these unique complexes exhibit novel structures, properties, and functions such as guest recognition, stimuli-responsive structural conversion, switching of the optical properties, excellent stability of the neutral radicals, etc. We believe that these multifunctional dipyrrin complexes will advance the basic chemistry of the dipyrrin complexes and develop their applications in the materials and medicinal chemistry fields.1 Introduction2 Linear Oligomers of Boron–Dipyrrin Complexes3 Cyclic Oligomers of Boron–Dipyrrin Complexes4 A Cyclic Oligomer of Zinc–Dipyrrin Complexes5 Group 13 Element Complexes of N2Ox Dipyrrins6 Chiral N2 and N2Ox Dipyrrin Complexes7 Group 14 Element Complexes of N2O2 Dipyrrins8 Other N2O2 Dipyrrin Complexes with Unique Properties and Functions9 Conclusion

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2

Sethi, Pooja, Rajshree Khare, and Renuka Choudhary. "Complexes of Pyrimidine Thiones: Mechanochemical Synthesis and Biological Evaluation." Asian Journal of Chemistry 32, no. 10 (2020): 2594–600. http://dx.doi.org/10.14233/ajchem.2020.22813.

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A new series of metal complexes with 1-(2-methylphenyl)-4,4,6-trimethyl pyrimidine-2-thione (2-HL1) and 1-(4-methylphenyl)-4,4,6-trimethyl pyrimidine-2-thione (4-HL2) ligands, [M(mppt)2(H2O)n] (M(II) = Cu, Mn, Co; n = 2 and M(II) = Ni, Zn; n = 0) have been synthesized using mechanochemical protocol. The complexes have been framed as [M(mppt)2(H2O)n] due to 1:2 (metal:ligand) nature of these metal complexs. Structures have been further confirmed on the basis of elemental analysis, Magnetic susceptibility measurements, electronic, infrared, far infrared, proton NMR, Mass spectral moment and thermogravimetric analysis studies. The infrared spectral data suggested that ligand behaves as a bidentate, coordinating through – N (endocyclic) and – S (exocyclic) donor atoms. All the compounds have also been screened for antibacterial and DNA photocleavage potential. Ligands complexed with Mn and Ni metals have shown the effect of substitution on their biological potentials. It was found that substitution at 4th or para position makes the ligand and its metal complexes have better antibacterial and DNA photocleaving agents.

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3

Prema. S, Prema S., and Leema Rose. A. "Metal Complexes of Phenyl Glycine-O-Carboxylic Acid: Preparation, Characterization, Electrochemical and Biological Properties." Oriental Journal Of Chemistry 38, no. 3 (June 30, 2022): 698–708. http://dx.doi.org/10.13005/ojc/380321.

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Metal complexes are the effective therapeutic compound and it became more emerging field in the drug discovery and delivery. A novel ligand phenyl-glycine -o- carboxylic acid was synthesized and further complexed with the metal (II) chlorides. The synthesized metal complexes was interpreted by FT-IR spectroscopy, Ultra Violet- visible, 1H-NMR, molar conductance, magnetic susceptibility and thermogravimetric study. The electrochemical properties of the ligand and its complexes were inquired in DMF. Antibacterial and fungal activities of the phenyl-glycine -o- carboxylic acid (ligand) and metal complexes were analyzed by three fungal and four bacteria pathogens. The ligand has no activity against Aspergillus terreus, but nickel, copper and cobalt chloride complexes showed good activity against Aspergillus terreus. On anti-bacterial activity compare to ligands and other metal (II) complexes the cobalt (II) complex revealed greater inhibition effect on selected bacteria.

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4

Irfandi, Rizal, Indah Raya, Ahyar Ahmad, Ahmad Fudholi, Hasnah Natsir, Desy Kartina, Harningsih Karim, Santi Santi, and Subakir Salnus. "Review on Anticancer Activity of Essential Metal Dithiocarbamate Complexes." Indonesian Journal of Chemistry 22, no. 6 (August 8, 2022): 1722. http://dx.doi.org/10.22146/ijc.73738.

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The importance of essential metal ions and their metal complexes in the creation of prospective medical therapies has long been recognized. In chemistry, molecular biology, and medicinal fields; the interaction of metal complexes with DNA has been a subject of study. The dithiocarbamate essential metal complex is described extensively in the literature for its various benefits and advantages. With proper use of ligands, it is proven to increase the cytotoxic activity of metal complexes against cancer cells. Some researches have shown significant progress regarding the biological activities of the dithiocarbamate essential metal complex as antimicrobial, antioxidant, and anticancer agents. Metal complexes form complexes with dithiocarbamate ligands with unique structural variations. In this study, we presented an overview of the cytotoxic effects of some dithiocarbamate essential metal complexes on cancer cells, as well as fresh approaches to the design of essential metal-based therapeutics containing dithiocarbamate and molecular targets in cancer therapy. This review may provide an update on recent developments in the medicinal use of essential metals with dithiocarbamate ligands, carried out to identify recent relevant literature. Finally, we predict that the essential metal complexed with dithiocarbamate can be a new breakthrough in the future development of cancer drugs.

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5

Sumrra, Sajjad Hussain, Muhammad Ibrahim, Sabahat Ambreen, Muhammad Imran, Muhammad Danish, and Fouzia Sultana Rehmani. "Synthesis, Spectral Characterization, and Biological Evaluation of Transition Metal Complexes of Bidentate N, O Donor Schiff Bases." Bioinorganic Chemistry and Applications 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/812924.

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New series of three bidentate N, O donor type Schiff bases(L1)–(L3)were prepared by using ethylene-1,2-diamine with 5-methyl furfural, 2-anisaldehyde, and 2-hydroxybenzaldehyde in an equimolar ratio. These ligands were further complexed with Co(II), Cu(II), Ni(II), and Zn(II) metals to produce their new metal complexes having an octahedral geometry. These compounds were characterized on the basis of their physical, spectral, and analytical data. Elemental analysis and spectral data of the uncomplexed ligands and their metal(II) complexes were found to be in good agreement with their structures, indicating high purity of all the compounds. All ligands and their metal complexes were screened for antimicrobial activity. The results of antimicrobial activity indicated that metal complexes have significantly higher activity than corresponding ligands. This higher activity might be due to chelation process which reduces the polarity of metal ion by coordinating with ligands.

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6

NOMURA, Mitsushiro, Satoshi HORIKOSHI, and Masatsugu KAJITANI. "Metal Dithiolene Complexes." Journal of the Japan Society of Colour Material 82, no. 7 (2009): 296–305. http://dx.doi.org/10.4011/shikizai.82.296.

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7

Trachevskii, V. V., S. V. Zimina, and E. P. Rodina. "Thiosulfate metal complexes." Russian Journal of Coordination Chemistry 34, no. 9 (September 2008): 664–69. http://dx.doi.org/10.1134/s1070328408090066.

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8

De Clercq, Erik. "Antiviral Metal Complexes." Metal-Based Drugs 4, no. 3 (January 1, 1997): 173–92. http://dx.doi.org/10.1155/mbd.1997.173.

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The initial events (virus adsorption and fusion with the cells) in the replicative cycle of human immunodeficiency virus (HIV) can serve as targets for the antiviral action of metal-binding compounds such as polyanionic compounds (polysulfates, polysulfonates, polycarboxylates, polyoxometalates, and sulfonated or carboxylated metalloporphyrins), bicyclams and G-octet-forming oligonucleotides. The adsorption and fusion of HIV with its target cells depends on the interaction of the viral envelope glycoproteins (gp 120) with the receptors (CD4, CXCR4) at the outer cell membrane. We are currently investigating how the aforementioned compounds interfere with these viral glycoproteins and/or cell receptor.

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9

ZURER, PAMELA. "METAL-DINITROGEN COMPLEXES." Chemical & Engineering News 75, no. 10 (March 10, 1997): 9. http://dx.doi.org/10.1021/cen-v075n010.p009.

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10

Vrieze, K., and G. Van Koten. "Metal heterodiene complexes." Inorganica Chimica Acta 100, no. 1 (May 1985): 79–96. http://dx.doi.org/10.1016/s0020-1693(00)88296-1.

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11

Miminoshvili, È. B. "Metal hydrazide complexes." Journal of Structural Chemistry 50, S1 (December 2009): 168–75. http://dx.doi.org/10.1007/s10947-009-0205-x.

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12

Denninger, U., J. J. Schneider, G. Wilke, R. Goddard, R. Krömer, and C. Krüger. "Transition metal complexes." Journal of Organometallic Chemistry 459, no. 1-2 (October 1993): 349–57. http://dx.doi.org/10.1016/0022-328x(93)86088-y.

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13

Sherrington, D. C. "Supported metal complexes." Reactive Polymers, Ion Exchangers, Sorbents 9, no. 2 (November 1988): 221–22. http://dx.doi.org/10.1016/0167-6989(88)90037-2.

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14

Panova, Yu S., A. V. Sheyanova, V. V. Sushev, N. V. Zolotareva, A. V. Cherkasov, and A. N. Kornev. "Metal phosphinohydrazone complexes." Russian Chemical Bulletin 69, no. 10 (October 2020): 1897–906. http://dx.doi.org/10.1007/s11172-020-2976-3.

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15

Leigh, G. J. "Macromolecule-metal complexes." Journal of Organometallic Chemistry 525, no. 1-2 (November 1996): 303. http://dx.doi.org/10.1016/s0022-328x(96)06448-0.

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16

Seppelt, Konrad. "Metal-Xenon Complexes." Zeitschrift für anorganische und allgemeine Chemie 629, no. 14 (December 2003): 2427–30. http://dx.doi.org/10.1002/zaac.200300226.

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17

Peng, Shie-Ming, Shao-An Hua, and Ming-Chuan Cheng. "From homonuclear metal string complexes to heteronuclear metal string complexes." Acta Crystallographica Section A Foundations and Advances 71, a1 (August 23, 2015): s462. http://dx.doi.org/10.1107/s2053273315093183.

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18

Hua, Shao-An, Ming-Chuan Cheng, Chun-hsien Chen, and Shie-Ming Peng. "From Homonuclear Metal String Complexes to Heteronuclear Metal String Complexes." European Journal of Inorganic Chemistry 2015, no. 15 (April 7, 2015): 2510–23. http://dx.doi.org/10.1002/ejic.201403237.

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19

Hua, Shao-An, Ming-Chuan Cheng, Chun-hsien Chen, and Shie-Ming Peng. "From Homonuclear Metal String Complexes to Heteronuclear Metal String Complexes." European Journal of Inorganic Chemistry 2015, no. 15 (May 2015): 2498. http://dx.doi.org/10.1002/ejic.201500458.

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20

Abd El-Hameed, Faten S. M. "TELLURITO COMPLEXES: BASIC METAL PYROTELLURITO COMPLEXES." Phosphorus, Sulfur, and Silicon and the Related Elements 119, no. 1 (December 1996): 241–48. http://dx.doi.org/10.1080/10426509608043481.

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21

Iqbal, Pervez, and Kiran Aftab. "Study of Complexation Behaviour of Lignite Extracted Humic Acid with Some Divalent Cations." Engineering Science Letter 2, no. 03 (October 9, 2023): 99–104. http://dx.doi.org/10.56741/esl.v2i03.431.

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In biogeochemical cycles, humic substances are natural electron shuttles in transforming nutrients and environmental pollutants. Humic acid complexes with macro and micronutrient metals are eco-friendly organo-mineral fertilisers. This study prepared and characterised lignite-extracted humic acid-metal (Fe, Mg, Zn) complexes. The proximate analysis exhibited the moisture, volatile matter, ash and fixed carbon contents of extracted humic acid of 02.61%, 17.31%, 57.18% and 22.90%, respectively. The percentage of metal ions in humic acid complexes ranges from 3.5-7.25%. The FTIR analysis of coal-extracted humic acids-metal complexes showed Zn, Mg and Fe ions complexed in a bidentate manner predominantly with the carboxylic acid moiety of humic acid. Thermal gravimetric analysis indicated a higher value of humic acid decomposition than their metal complexes. The thermal stability observed order is HA- Zn >HA-Fe>HA- Mg. The X-ray diffraction pattern pointed toward the noncrystalline nature of humic acid and their respective complexes due to having few intense and small diffuse peaks in the 2θ range from 0 to 80°. Hence, the humic acid-metals complexes increase the soil humic content and the availability of essential nutrients that enhance the loam's biotic action.

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22

Pasynskii, A. A., F. S. Denisov, Yu V. Torubaev, N. I. Semenova, V. M. Novotortsev, O. G. Ellert, S. E. Nefedov, and K. A. Lyssenko. "Antiferromagnetic complexes with metalmetal bonds." Journal of Organometallic Chemistry 612, no. 1-2 (October 2000): 9–13. http://dx.doi.org/10.1016/s0022-328x(00)00341-7.

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23

Chipman, Jill A., and John F. Berry. "Paramagnetic Metal–Metal Bonded Heterometallic Complexes." Chemical Reviews 120, no. 5 (February 11, 2020): 2409–47. http://dx.doi.org/10.1021/acs.chemrev.9b00540.

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24

Pasynskii, A. A., I. V. Skabitski, Yu V. Torubaev, N. I. Semenova, V. M. Novotortsev, O. G. Ellert, and K. A. Lyssenko. "Antiferromagnetic complexes with metal–metal bonds." Journal of Organometallic Chemistry 671, no. 1-2 (April 2003): 91–100. http://dx.doi.org/10.1016/s0022-328x(03)00048-2.

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25

Kokkes, Maarten W., Wim G. J. De Lange, Derk J. Stufkens, and Ad Oskam. "Photochemistry of metal—metal bonded complexes." Journal of Organometallic Chemistry 294, no. 1 (October 1985): 59–73. http://dx.doi.org/10.1016/0022-328x(85)88053-0.

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26

Pasynskii, A. A., I. L. Eremenko, S. E. Nefedov, B. Orazsakhatov, A. A. Zharkikh, O. G. Ellert, V. M. Novotortsev, A. I. Yanovsky, and Yu T. Struchkov. "Antiferromagnetic complexes with metal-metal bonds." Journal of Organometallic Chemistry 444, no. 1-2 (February 1993): 101–5. http://dx.doi.org/10.1016/0022-328x(93)83061-y.

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27

Andréa, Ronald R., Hero E. de Jager, Derk J. Stufkens, and Ad Oskam. "Photochemistry of metalmetal bonded complexes." Journal of Organometallic Chemistry 316, no. 3 (December 1986): C24—C28. http://dx.doi.org/10.1016/0022-328x(86)80510-1.

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28

Eremenko, I. L., A. A. Pasynskii, A. S. Katugin, V. R. Zalmanovitch, B. Orazsakhatov, S. A. Sleptsova, A. I. Nekhaev, et al. "Antiferromagnetic complexes with metalmetal bonds." Journal of Organometallic Chemistry 365, no. 3 (April 1989): 325–40. http://dx.doi.org/10.1016/0022-328x(89)87031-7.

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29

Pasynskii, A. A., I. L. Eremenko, E. E. Stomakhina, S. E. Nefedov, O. G. Ellert, A. I. Yanovsky, and Yu T. Struchkov. "Antiferromagnetic complexes with metalmetal bonds." Journal of Organometallic Chemistry 406, no. 3 (April 1991): 383–90. http://dx.doi.org/10.1016/0022-328x(91)83126-o.

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30

Pasynskii, A. A., I. L. Eremenko, V. R. Zalmanovitch, V. V. Kaverin, B. Orazsakhatov, S. E. Nefedov, O. G. Ellert, V. M. Novotortsev, A. I. Yanovsky, and Yu T. Struchkov. "Antiferromagnetic complexes with metalmetal bonds." Journal of Organometallic Chemistry 414, no. 1 (August 1991): 55–63. http://dx.doi.org/10.1016/0022-328x(91)83241-u.

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31

Eremenko, I. L., A. A. Pasynskii, E. A. Vas'utinskaya, A. S. Katugin, S. E. Nefedov, O. G. Ellert, V. M. Novotortsev, A. F. Shestakov, A. I. Yanovsky, and Yu T. Struchkov. "Antiferromagnetic complexes with metalmetal bonds." Journal of Organometallic Chemistry 411, no. 1-2 (July 1991): 193–205. http://dx.doi.org/10.1016/0022-328x(91)86018-l.

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32

Sacarescu, Liviu, Rodinel Ardeleanu, Gabriela Sacarescu, Mihaela Simionescu, and Ionel Mangalagiu. "Polysilane–Metal Complexes for Organic Semiconductors." High Performance Polymers 19, no. 5-6 (October 2007): 501–9. http://dx.doi.org/10.1177/0954008306081193.

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New polysilane-metal complexes structures were obtained by the polycondensation reaction of α,ω-bis(chloromethyl)-polymethylphenylsilane with the Ni (II) complex of bis(salicylidene)ethylenedia-mine (salen). The chloro-functionalized polysilane was obtained by a modified Wurtz coupling procedure at low temperatures. To obtain the polymer-metal complex the resulted macroligand was complexed with metal cations. This structure is characterized by a highly localized electroactivitry in the redox moiety combined with a specific σ conjugative effect in the polysilane chain. Infrared, 1H NMR and UV-vis spectral analysis as well as gel permeation chromatography and thermogravimetric analysis were used to investigate the new chemical structures.

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33

Haruna, A., Rumah, M.M., Sani, U., and Ibrahim, A.K. "Synthesis, Characterization and corrosion Inhibition Studies on Mn (II) and Co (II) Complexes Derived from 1-{(Z)-[(2-hydroxyphenyl) imino]methyl}naphthalen-2-ol in 1M HCl Solution." International Journal of Biological, Physical and Chemical Studies 3, no. 1 (May 25, 2021): 09–18. http://dx.doi.org/10.32996/ijbpcs.2021.3.1.2.

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Schiff base derived from the reaction of 2-amino phenol and 2-hydroxy-1-naphthaldehyde and its Co (II), and Mn (II) complexes have been synthesized and characterized by solubility test, melting point/ decomposition temperatures, molar conductance, IR and magnetic susceptibility. The number of ligands coordinated to the metal ion was determined using Job’s method of continuous variation. Their molar conductance values indicate that all the complexes are non-electrolytes. Magnetic moment values of the complexes showed that both Mn (II) and Co (II) are paramagnetic. The spectroscopic data of metal complexes indicated that the metal ions are complexed with azomethine nitrogen and deprotonated oxygen atom. Corrosion inhibition of the schiff base and Mn (II) and Co (II) complexes were evaluated using the weight loss method in a 0.1MHCl solution for copper metal. The inhibition efficiency increased with increasing inhibitors concentration. The negative values of Gibb’s free energy of adsorption (ΔGads) confirmed the spontaneity and physical adsorption of the inhibition process which is inconsistent with Langmuir adsorption isotherm.

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34

Salomanravi, A., R. Nandini Asha, V. Veeraputhiran, and P. Muthuselvan. "NOVEL Co(II) Ni(II) AND Cu(II) COMPLEXES OF TRIDENTATE ONS DONOR SCHIFF BASE LIGANDS: SYNTHESIS, CHARACTERIZATION, DNA CLEAVAGE, MOLECULAR DOCKING, ANTIOXIDANT AND ANTIMICROBIAL STUDIES." Journal of Advanced Scientific Research 13, no. 01 (February 10, 2022): 167–76. http://dx.doi.org/10.55218/jasr.202213118.

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A new Schiff base ligand 2-((2-furylmethylene)amino)benzenethiol of the type ONS has been synthesized from 2- aminothiophenol and 2-furfuraldehyde and complexed with Co(II), Ni(II) and Cu(II) metal ions. The synthesized ligand and complexes [Co(II),Ni(II) 8Cu(II)] were characterized using various spectral techniques viz., IR, NMR, EI-MS and thermogravimetric analysis. The geometry of the synthesized complexes was confirmed by electronic spectra, magnetic moment measurements and EPR analysis. DNA cleavage studies were performed using Gel electrophoresis method. The antibacterial activity of all the metal complexes studied against Gram positive bacterial strains Bacillus substilis, Staphylococcus aureus, and also Gram negative bacteria Escherichia coli, Pseudomonas fluorescens and Klebsiella pneumoniae with comparison to Gentamycin. Antifungal activities were carried out against two fungal strains i.e. Aspergillus Niger and Candida albicans. Schiff base and its metal complexes were also screened for in vitro antioxidant activity and was observed that the Co(II) complex shows enhanced activity when compared to ligand and other metal complexes and was further substantiated by molecular docking studies.

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35

Pinky and Anita Rani. "Macrocyclic Metal Complexes of Tetradentate Hydrazone Ligand: Synthesis, Characterization and its Applications." Asian Journal of Chemistry 36, no. 6 (May 31, 2024): 1359–65. http://dx.doi.org/10.14233/ajchem.2024.31562.

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The condensation reaction between dimethyl tetraphthalate and hydrazine hydrate results in the formation of 4-formylbenzohydrazide, which was refluxed with malonic acid to obtain novel hydrazone ligand (FBH-L). The ligand was further subjected to coordinate with two metal salts viz. ZrCl4 and NiCl2 to synthesize respective transition metal(II) complexes. The ligand and its metal complexes were characterized by various spectral and analytical techniques like UV, FTIR, 1H NMR, 13C NMR, mass spectrometry, etc. The synthesized complexe were evaluated for their antibacterial and anti-angiogenic properties to determine their impact on microorganisms and the growth of blood cells, respectively and the results obtained were found to be satisfactory. Furthermore, all the metal-complexes demonstrated its efficacy as photocatalyst and also ability to remove metals from real water samples.

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36

Mansoor Ahmed Zi Ning Lei, Mansoor Ahmed Zi Ning Lei, Mohsin Ali Mohsin Ali, Syed Imran Ali Syed Imran Ali, Konatsu Kojima Konatsu Kojima, Pranav Gupta Pranav Gupta, Majid Mumtaz Majid Mumtaz, Dong Hua Yang Dong Hua Yang, and Syed Moazzam Haider and Zhe Sheng Chen Syed Moazzam Haider and Zhe Sheng Chen. "Synthesis, Characterization and Anticancer Activity of Isonicotinylhydrazide Metal Complexes." Journal of the chemical society of pakistan 41, no. 1 (2019): 113. http://dx.doi.org/10.52568/000706/jcsp/41.01.2019.

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This study focuses characterization of iron (II), iron (III), cobalt (II), copper (II) and nickel (II) complexes of Isoniazid (INH) and studying their spectroscopic as well as physiochemical properties. FTIR studies showed that INH binds the metal from oxygen of carbonyl group and nitrogen of amino group. The proton NMR spectra of the metal complexes confirmed the conversion of ligand molecules into their respective metal complexes. However, pattern of splitting and shapes of peaks was observed but the protons resonated in the expected region. XRD patterns may be concluded that the complexes are mostly comprised of nano-sized particles behaving like amorphous materials. Scanning electron microscopy (SEM) revealed marked changes in the morphology of complexes, and their degradation at higher temperature strengthens the hypothesis of the successful formation of complexes. The MTT cytotoxicity assay was used for the screening these complexes against four human cell lines but the results did not prove significant.

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37

Schreiber, A., H. Rauter, M. Krumm, S. Menzer, E. C. Hillgeris, and B. Lippert. "Multinuclear Metal Nucleobase Complexes." Metal-Based Drugs 1, no. 2-3 (January 1, 1994): 241–46. http://dx.doi.org/10.1155/mbd.1994.241.

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Of all properties of metal nucleobase complexes, formation of multinuclear species appears to be an outstanding feature. After a brief introduction into well known polymeric metal nucleobase complexes, three aspects recently Studied in our laboratory will be dealt with in more detail: (i) Heteronuclear complexes derived from trans-[(amine)2Pt(1-MeC)2]2+ (1-MeC=1-methylcytosine). They form, e. g. with Pd(II) or Hg(II), upon single deprotonation of the exocyclic amino group of each 1-MeC ligand, compounds of type trans-[(amine)2Pt(1-MeC-)2MY]n+, displaying Pt-M bond formation. (ii) Cyclic nucleobase complexes derived from cis-a2Pt(II). A cyclic compound of composition {[(en)Pt(UH-N1,N3)]4}4+ (UH=monoanion of unsubstituted uracil) is presented and the analogy with organic calix-[4]-arenes is pointed out. (iii) Cyclic nucleobase complexes from trans-a2Pt(II). Possible ways for the preparation of macrocyclic nucleobase complexes containing trans-a2Pt(II) linkages are outlined and precursors and intermediates are presented.

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38

BURGER, J., C. GACK, A. GREISSELMANN, G. KETTENBACH, P. KLUFERS, P. MAYER, H. PIOTROWSKI, and J. SCHUHMACHER. "ChemInform Abstract: Polyol-Metal Complexes. Part 29. Carbohydrate-Complexed Heavy Metal Catalysts." ChemInform 29, no. 49 (June 18, 2010): no. http://dx.doi.org/10.1002/chin.199849329.

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39

Mustapha, Abdullahi, John Reglinski, and Alan R. Kennedy. "Metal complexes as potential ligands: The deprotonation of aminephenolate metal complexes." Inorganic Chemistry Communications 13, no. 4 (April 2010): 464–67. http://dx.doi.org/10.1016/j.inoche.2010.01.009.

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40

Zirngast, Michaela, Christoph Marschner, and Judith Baumgartner. "Spectroscopic and Structural Study of Some Oligosilanylalkyne Complexes of Cobalt, Molybdenum and Nickel." Molecules 24, no. 1 (January 8, 2019): 205. http://dx.doi.org/10.3390/molecules24010205.

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Metal induced stabilization of α-carbocations is well known for cobalt- and molybdenum complexed propargyl cations. The same principle also allows access to reactivity enhancement of metal coordinated halo- and hydrosilylalkynes. In a previous study, we have shown that coordination of oligosilanylalkynes to the dicobalthexacarbonyl fragment induces striking reactivity to the oligosilanyl part. The current paper extends this set of oligosilanylalkyne complexes to a number of new dicobalthexacarbonyl complexes but also to 1,2-bis(cyclopentadienyl)tetracarbonyldimolybdenum and (dippe)Ni complexes. NMR-Spectroscopic and crystallographic analysis of the obtained complexes clearly show that the dimetallic cobalt and molybdenum complexes cause rehybridization of the alkyne carbon atoms to sp3, while in the nickel complexes one π-bond of the alkyne is retained. For the dicobalt and dimolybdenum complexes, strongly deshielded 29Si NMR resonances of the attached silicon atoms indicate enhanced reactivity, whereas the 29Si NMR shifts of the respective nickel complexes are similar to that of respective vinylsilanes.

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41

Ricardo, Carolynne, Piyush Kumar, and Leonard Wiebe. "Bifunctional Metal – Nitroimidazole Complexes for Hypoxia Theranosis in Cancer." Journal of Diagnostic Imaging in Therapy 2, no. 1 (April 15, 2015): 103–58. http://dx.doi.org/10.17229/jdit.2015-0415-015.

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42

Reham Z. Hamza, Zain A. Sheshah, Reham H. Suleman, Norah F. Al-Juaid, Nejoud A. Hamed, and Maram A. Al-Juaid. "Efficacy of some antibiotics and some metal complexes (Nano-formula) that could increase their effectiveness during COVID-19." International Journal of Biological and Pharmaceutical Sciences Archive 3, no. 1 (January 30, 2022): 008–14. http://dx.doi.org/10.53771/ijbpsa.2022.3.1.0021.

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Medicinal applications of metals and their complexes are of elevating clinical importance especially during COVID-19 pandemic. Antibiotics like (Ceftriaxone "CFx"– Erythromycin"Ery") chemically complexes with different metals by using methanol and continuous stirring for 3 h and then the colored precipitates were obtained and then dried for further chemical analysis and confirming the chemical structure by TEM analysis and then measuring total antioxidant capacity of the complex and performing DPPH assay for the antibiotic drug and its different metal complexes like Se (II) , Mg(II) and Zn (II). complexes were studied and characterized based on transmission electron microscopy (TEM). Chemical data revealed that CFx and Ery have great ability to complexes with these metals and give different chemical structure. Antioxidant capacities , anti-inflammatory activities were carried out in vitro. The metal complexed with antibiotics "combination" exhibited potent antioxidant and ant inflammatory activities and suppressed oxidative stress that could adjust the pulmonary disturbances and alterations induced by pneumenia. In conclusion, Antibiotics/metal drug complexes could produce a high synergistic effects against oxidative stress and viral infection symptoms in some cases and can be considered potential ameliorative therapy against pulmonary dysfunction, which may benefit against COVID-19 pandemic.

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43

Norman, Nicholas C. "Meldola Medal Lecture. Organotransition metal complexes incorporating bismuth." Chemical Society Reviews 17 (1988): 269. http://dx.doi.org/10.1039/cs9881700269.

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44

Sanjeev, A., N. Naresh Reddy, M. Kumara Swamy, Rohini Rondla, S. Ranga Reddy, and P. Muralidhar Reddy. "Synthesis, Characterization and in vitro Anticancer Studies of New Co(II), Ni(II), Cu(II) and Zn(II) Complexes of (E)-4-((Quinoline-8-ylimino)methyl)benzene-1,2,3-triol Ligand." Asian Journal of Organic & Medicinal Chemistry 6, no. 4 (December 31, 2021): 250–58. http://dx.doi.org/10.14233/ajomc.2021.ajomc-p345.

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Herein, a new tridentate (NNO) Schiff base ligand, (E)-4-[(quinoline-8-ylimino)methyl]benzene-1,2,3- triol derived from the condensation of 8-aminoquinoline with 2,3,4-trihydroxy benzaldehyde is reported. The ligand was complexed with certain metal ions like Co(II) (1), Ni(II) (2), Cu(II) (3), Zn(II) (4) and were characterized by various spectroscopic and analytical techniques such as FT-IR, UV-Vis, 1H NMR, 13C NMR, ESI-Mass, ESR, elemental analysis and magnetic susceptibility. Spectral data revealed octahedral geometry for cobalt(II), nickel(II), copper(II) complexes and tetrahedral geometry for zinc(II) complex. All the metal(II) complexes along with the Schiff base ligand were screened for their anticancer activities. The CT-DNA binding studies revealed high binding propensity for metal complexes with Kb values 1.50 × 104 M-1 for 1; 3.62 × 104 M-1 for 2; 2.53 × 104 M-1 for 3 and 1.8 × 104 M-1 for 4, respectively. Anticancer studies against A549 & MCF-7 demonstrated excellent antiproliferative activity with IC50 values in the range 17.62-48.82 μM. A standard drug cisplatin was employed to compare the activity of metal complexes. The complexes exhibited remarkable antitumour activity due to their high binding ability with DNA. It is interesting to observe that the complexes did not produce any cytotoxicity towards the normal cell lines.

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45

McGeachie, Liam J. R., Michael Bühl, David B. Cordes, Alexandra M. Z. Slawin, and J. Derek Woollins. "Bridging (Thionylimido)metal Complexes." Inorganic Chemistry 60, no. 12 (May 27, 2021): 8423–27. http://dx.doi.org/10.1021/acs.inorgchem.1c00725.

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46

Reinholdt, Anders, and Jesper Bendix. "Transition Metal Carbide Complexes." Chemical Reviews 122, no. 1 (November 19, 2021): 830–902. http://dx.doi.org/10.1021/acs.chemrev.1c00404.

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47

Zhou, Wei, Wen-Jie Pan, Jie Chen, Min Zhang, Jin-Hong Lin, Weiguo Cao, and Ji-Chang Xiao. "Transition-metal difluorocarbene complexes." Chemical Communications 57, no. 74 (2021): 9316–29. http://dx.doi.org/10.1039/d1cc04029d.

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48

Elliott, Paul I. P. "Photophysics of metal complexes." Annual Reports Section "A" (Inorganic Chemistry) 108 (2012): 389. http://dx.doi.org/10.1039/c2ic90028a.

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49

Underhill, A. E., M. M. Ahmad, D. J. Turner, P. I. Clemenson, K. Carneiro, Shen Yueqiuan, and K. Mortensen. "Conducting Metal Dithiolate Complexes." Molecular Crystals and Liquid Crystals 120, no. 1 (March 1985): 369–76. http://dx.doi.org/10.1080/00268948508075822.

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50

Braunschweig, Holger, Rian D. Dewhurst, and Viktoria H. Gessner. "Transition metal borylene complexes." Chemical Society Reviews 42, no. 8 (2013): 3197. http://dx.doi.org/10.1039/c3cs35510a.

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