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Journal articles on the topic 'Complexes of Pyridine'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Webber, Christopher K., Erica K. Richardson, Diane A. Dickie, and T. Brent Gunnoe. "Electrochemically Active Copper Complexes with Pyridine-Alkoxide Ligands." Inorganics 12, no. 8 (2024): 200. http://dx.doi.org/10.3390/inorganics12080200.

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Pyridine-alkoxide (pyalk) ligands that support transition metals have been studied for their use in electrocatalytic applications. Herein, we used the pyalk proligands diphenyl(pyridin-2-yl)methanol ([H]PhPyalk, L1), 1-(pyren-1-yl)-1-(pyridin-2-yl)ethan-1-ol ([H]PyrPyalk, L2), 1-(pyridine-2-yl)-1-(thiophen-2-yl)ethan-1-ol ([H]ThioPyalk, L3), and 1-(ferrocenyl)-1-(pyridin-2-yl)ethan-1-ol ([H]FePyalk, L4) to synthesize CuII complexes that vary in nuclearity and secondary coordination sphere. Also, the proligand 1-(ferrocenyl)-1-(5-methoxy-pyridin-2-yl)ethan-1-ol ([H]FeOMePyalk, L5) was synthesiz

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2

Niu, Xiang-Long, Lin Wei, Jian-Cheng Liu, et al. "Syntheses and structures of three macrocyclic supramolecular complexes and one ZnII-containing coordination polymer generated from a semi-rigid multidentate N-containing ligand." Acta Crystallographica Section C Structural Chemistry 77, no. 1 (2021): 29–39. http://dx.doi.org/10.1107/s2053229620016083.

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Semirigid organic ligands can adopt different conformations to construct coordination polymers with more diverse structures when compared to those constructed from rigid ligands. A new asymmetric semirigid organic ligand, 4-{2-[(pyridin-3-yl)methyl]-2H-tetrazol-5-yl}pyridine (L), has been prepared and used to synthesize three bimetallic macrocyclic complexes and one coordination polymer, namely, bis(μ-4-{2-[(pyridin-3-yl)methyl]-2H-tetrazol-5-yl}pyridine)bis[dichloridozinc(II)] dichloromethane disolvate, [Zn2Cl4(C12H10N6)2]·2CH2Cl2, (I), the analogous chloroform monosolvate, [Zn2Cl4(C12H10N6)2

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3

Śliwa, Wanda, and Małgorzata Deska. "Platinum(II) Complexes of Pyridines. A Review." Collection of Czechoslovak Chemical Communications 64, no. 3 (1999): 435–58. http://dx.doi.org/10.1135/cccc19990435.

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The chemistry of platinum(II) complexes of pyridine and related compounds is reviewed. Also the oxidative addition reaction to platinum(II) complexes of pyridines, as a method of conversion of Pt(II) into Pt(IV) species is described. A review with 90 references.

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4

Nakanishi, Takumi, and Osamu Sato. "Crystal structures of two nickel compounds comprising neutral NiIIhydrazone complexes and dicarboxylic acids." Acta Crystallographica Section E Crystallographic Communications 73, no. 2 (2017): 103–6. http://dx.doi.org/10.1107/s2056989016020326.

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Two isostructural NiIIcompounds, bis{N-[1-(pyridin-2-yl-κN)ethylidene]pyridine-4-carbohydrazonato-κ2N′,O}nickel(II)–2,5-dichloroterephthalic acid (1/1), [Ni(C13H11N4O)2](C8H4Cl2O4), and bis{N-[1-(pyridin-2-yl-κN)ethylidene]pyridine-4-carbohydrazonato-κ2N′,O}nickel(II)–2,5-dibromoterephthalic acid (1/1), [Ni(C13H11N4O)2](C8H4Br2O4), were synthesized and their crystal structures determined. The pair ofN,N′,O-tridentateN-[1-(pyridin-2-yl-κN)ethyl]pyridine-4-carbohydrazonateLligands result in acis-NiO2N4octahedral coordination sphere for the metal ions. The asymmetric units consist of two half-mol

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5

Fatih, Mehmet EMEN, and Esra DEMİRDÖĞEN Ruken. "SYNTHESIS OF PYRIDINE DERIVATIVE POLYMERIC COPPER COMPLEX WITH METAL-AZID BONDS." Journal of Natural Science and Technologies 1, no. 1 (2022): 143–50. https://doi.org/10.5281/zenodo.7384181.

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In this study, pyridine-derived polymeric copper (II) complexes containing metal azide bonds were prepared. The characterization of the complexes given with the general formula, [Cu(L)<sub>2</sub>(N<sub>3</sub>)<sub>2</sub>Cl<sub>2</sub>]n (L1: 3,5-dimethyl pyridine, L2: 3,4-dimethyl pyridine, L3: 2-amino-3-methyl pyridine, L4: 2,6-diamino pyridine) was performed by FT-IR, AAS and magnetic susceptibility analyzes. The intense peak observed at 2045-2167 cm-1 in the spectra corresponds to the asymmetric azide vibrations, υas(N<sub>3</sub><sup>-</sup>), which indicates that polymeric copp

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6

Wang, Xu, Bradford R. Sohnlein, Shenggang Li, Jason F. Fuller, and Dong-Sheng Yang. "Pulsed-field ionization electron spectroscopy and molecular structures of copper-(pyridine)n (n = 1, 2) complexes." Canadian Journal of Chemistry 85, no. 10 (2007): 714–23. http://dx.doi.org/10.1139/v07-068.

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Cu-(pyridine)n (n = 1, 2) complexes are prepared in a pulsed laser ablation cluster source and identified using laser photoionization time-of-flight mass spectrometry. High-resolution electron spectra of these complexes are obtained using pulsed-field ionization zero electron kinetic energy (ZEKE) photoelectron spectroscopy. Metal-pyridine and pyridine-based vibrational modes are identified by comparing the ZEKE spectra with previous spectroscopic studies of isolated pyridine, pyridine adsorbed on metal surfaces, and other Cu complexes. Ground electronic states and molecular structures are det

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7

Nagaraju, N., J. Sreeramulu, V. Anjaneyulu, P. Malleswarareddy, and G. Ramamohan. "A study of in vitro antimicrobial activities and antioxidant of lanthanide complexes with a tri dentate Schiff base ligand." Research Journal of Chemistry and Environment 27, no. 5 (2023): 42–51. http://dx.doi.org/10.25303/2705rjce042051.

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The tridentate N3-type Schiff base 4-(anthracen-10-yl)-2,6-di(pyridin-2-yl)pyridine was synthesized from the condensation reaction of 2-acetyl pyridine and anthracene-10-carbaldehyde with ammonia using one pot methodology. This hybrid ligand was used for synthesis of lanthanide complexes (La, Sm and Eu) as novel potential biological agent. The lanthanide complexes were characterized on the basis of elemental, FT-IR, UV-Visible, mass spectrometry as well as molar conductivity. The complexes were screened for in vitro antibacterial and antifungal activities against the multidrug resistant pathog

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8

Liu, Ting, Yu-Peng Pan, Suna Wang, and Jian-Min Dou. "Two novel lead(II) complexes of 2-(hydroxymethyl)pyridine: a threefold diamondoid supramolecular network based on Pb4O4cores and a two-dimensional (4,4) network based on Pb2O2units." Acta Crystallographica Section C Crystal Structure Communications 69, no. 4 (2013): 394–99. http://dx.doi.org/10.1107/s0108270113006987.

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Reactions of 2-(hydroxymethyl)pyridine (Hhmp) with PbCl2and Pb(NO3)2at room temperature led to the formation of two novel compounds, namely tetrakis[μ3-(pyridin-2-yl)methanolato]-tetrahedro-tetrakis[chloridolead(II)], [Pb4(C6H6NO)4Cl4], (I), and poly[(μ2-nitrato)[μ2-(pyridin-2-yl)methanolato]lead(II)], [Pb(C6H6NO)(NO3)]n, (II). Compound (I) exhibits a tetranuclear Pb4O4cubane structure, which is connected through π–π stacking interactions between the pyridine groups of the (pyridin-2-yl)methanolate (hmp−) ligands and through C—H...Cl interactions to form an interesting threefold diamondoid net

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9

Kacsir, István, Adrienn Sipos, Evelin Major, et al. "Half-Sandwich Type Platinum-Group Metal Complexes of C-Glucosaminyl Azines: Synthesis and Antineoplastic and Antimicrobial Activities." Molecules 28, no. 7 (2023): 3058. http://dx.doi.org/10.3390/molecules28073058.

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While platinum-based compounds such as cisplatin form the backbone of chemotherapy, the use of these compounds is limited by resistance and toxicity, driving the development of novel complexes with cytostatic properties. In this study, we synthesized a set of half-sandwich complexes of platinum-group metal ions (Ru(II), Os(II), Ir(III) and Rh(III)) with an N,N-bidentate ligand comprising a C-glucosaminyl group and a heterocycle, such as pyridine, pyridazine, pyrimidine, pyrazine or quinoline. The sugar-containing ligands themselves are unknown compounds and were obtained by nucleophilic additi

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10

Hatua, Kaushik, and Prasanta K. Nandi. "Third-order NLO property of beryllium-pyridyne complexes." Journal of Theoretical and Computational Chemistry 13, no. 01 (2014): 1350075. http://dx.doi.org/10.1142/s0219633613500752.

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Six pyridyne isomers and their complexes with beryllium have been considered for the theoretical study of the third-order polarizability. The NLO properties are calculated by employing the DFT functionals BLYP, B3LYP, BHHLYP, B3PW91, BP86 and B2PLYP for the 6-311++G(d,p) basis set. The C - Be bond length in the complexes varies within 1.644 Å–1.771 Å indicating covalent interactions between the metal and pyridynes. The present investigation reveals that the magnitude of second-hyperpolarizability of pyridynes strongly enhances upon complex formation with beryllium. The maximum hyperpolarizabil

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11

Xun-Zhong, Zou, Feng An-Sheng, Zeng Fu-Ran, et al. "Synthesis, Crystal Structures, and Antimicrobial and Antitumor Studies of Two Zinc(II) Complexes with Pyridine Thiazole Derivatives." Bioinorganic Chemistry and Applications 2020 (September 15, 2020): 1–9. http://dx.doi.org/10.1155/2020/8852470.

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Two pyridine thiazole derivatives, namely, 4-(pyridin-2-yl)-2-(2-(pyridin-2-ylmethylene)hydrazinyl)thiazole (L1) and 4-(pyridin-3-yl)-2-(2-(pyridin-4-ylmethylene)hydrazinyl)thiazole (L2), were afforded by a cyclization reaction between α-haloketone and thioamide, and their Zn(II) complexes were prepared by the reaction of ligands and corresponding metal salts, respectively, and characterized by X-ray diffraction and elemental analysis. Both crystals were obtained by ether diffusion and crystallized in a monoclinic system. The in vitro antimicrobial activity of the Zn(II) complexes and ligands

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12

Shubina, E. N., E. A. Flick, and I. Yu Zhukova. "Donor-acceptor interactions of iodine with pyridine bases in aqueous and organic media." BIO Web of Conferences 173 (2025): 03014. https://doi.org/10.1051/bioconf/202517303014.

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Spectrophotometric studies were carried out on the possibility of the formation of complexes between active forms of iodine and pyridine bases in solvents of different polarities - water (H2O) and dichloromethane (CH2Cl2). Analysis of electronic absorption spectra showed the appearance of different forms of iodine when dissolved in H2O (220 nm, 290 nm, 360 nm, 460 nm) and in CH2Cl2 (240 nm, 300 nm, 504 nm). To prove the possible interaction of various forms of iodine with pyridine bases, absorption spectra of pyridine, 2,6-lutidine, collidine and mixtures (iodine-pyridine base) in H2O and CH2C

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13

Huang, Yanmin, Erbin Kong, Junyan Zhan, et al. "Synthesis and Cytotoxic Evaluation of Steroidal Copper (Cu (II)) Complexes." Bioinorganic Chemistry and Applications 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/4276919.

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Using estrone and pregnenolone as starting materials, some steroidal copper complexes were synthesized by the condensation of steroidal ketones with thiosemicarbazide or diazanyl pyridine and then complexation of steroidal thiosemicarbazones or steroidal diazanyl pyridines with Cu (II). The complexes were characterized by IR, NMR, and HRMS. The synthesized compounds were screened for their cytotoxicity against HeLa, Bel-7404, and 293T cell lines in vitro. The results show that all steroidal copper (II) complexes display obvious antiproliferative activity against the tested cancer cells. The IC

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14

Baker, AT, P. Singh, and V. Vignevich. "Iron(II) and Nickel(II) Complexes of 2,6-Di(thiazol-2-yl)pyridine and Related Ligands." Australian Journal of Chemistry 44, no. 8 (1991): 1041. http://dx.doi.org/10.1071/ch9911041.

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2,6-Di(thiazol-2-yl]pyridine (1a), 2,6-di(4-methylthiazol-2-yl)pyridine (1b) and 2,6-di(2-imid-azolin-2-yl)pyridine (3) have been prepared by the reaction of pyridine-2,6-dicarbothioamide with bromoacetaldehyde diethyl acetal, bromoacetone and ethylenediamine, severally. Bis ( ligand ) iron(II) and nickel(II) complexes of all ligands have been prepared. The bis ( ligand ) iron(II) complexes of (1a) and (3) are low-spin whereas that of (1b) is high-spin at room temperature and undergoes a thermally induced spin transition. The field strengths of the ligands , determined from the spectra of thei

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15

Demirdogen, Ruken Esra, Tuncay Yeşilkaynak, Tetyana Tishakova, and Fatih Mehmet Emen. "Antibacterial Cellulose Acetate Microfibers Containing Pyridine Derivative Complexes." Chemistry & Chemical Technology 15, no. 2 (2021): 217–25. http://dx.doi.org/10.23939/chcht15.02.217.

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Pyridine (L1) and 2,4-dimethylpyridine (L2) halide complexes of the type of [ML2X2] were prepared and characterized via FT-IR and 1H NMR. The CA microfibers containing complexes were electrospun and investigated via FT-IR. The morphologies of the microfibers were investigated via FE-SEM. Antibacterial activities of the complexes and the fibers were investigated.

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16

Kim, Jiyun, Hyungwoo Hahm, Ji Yeon Ryu, et al. "Pyridine-Chelated Imidazo[1,5-a]Pyridine N-Heterocyclic Carbene Nickel(II) Complexes for Acrylate Synthesis from Ethylene and CO2." Catalysts 10, no. 7 (2020): 758. http://dx.doi.org/10.3390/catal10070758.

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Nickel(II) dichloride complexes with a pyridine-chelated imidazo[1,5-a]pyridin-3-ylidene py-ImPy ligand were developed as novel catalyst precursors for acrylate synthesis reaction from ethylene and carbon dioxide (CO2), a highly promising sustainable process in terms of carbon capture and utilization (CCU). Two types of ImPy salts were prepared as new C,N-bidentate ligand precursors; py-ImPy salts (3, 4a–4e) having a pyridine group at C(5) on ImPy and a N-picolyl-ImPy salt (10) having a picolyl group at N atom on ImPy. Nickel(II) complexes such as py-ImPyNi(II)Cl2 (7, 8a–8e) and N-picolyl-ImPy

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17

Cubo, Leticia, Thalia Parro, Amancio Carnero, Luca Salassa, Ana Matesanz, and Adoracion Quiroga. "Synthesis, Reactivity Studies, and Cytotoxicity of Two trans-Iodidoplatinum(II) Complexes. Does Photoactivation Work?" Inorganics 6, no. 4 (2018): 127. http://dx.doi.org/10.3390/inorganics6040127.

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trans-Platinum complexes have been the landmark in unconventional drugs prompting the development of innovative structures that might exhibit chemical and biological profiles different to cisplatin. Iodido complexes signaled a new turning point in the platinum drug design field when their cytotoxicity was reevaluated and reported. In this new study, we have synthesized and evaluated diodidoplatinum complexes trans-[PtI2(amine)(pyridine)] bearing aliphatic amines (isopropylamine and methylamine) and pyridines in trans configuration. X-ray diffraction data support the structural characterization

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18

Velada, José L., Luis C. Cesteros, and I. Katime. "Infrared Study of the Interactions between Poly(Vinyl Pyridines) and Poly(Mono-n-Alkyl Itaconates)." Applied Spectroscopy 50, no. 7 (1996): 893–99. http://dx.doi.org/10.1366/0003702963905529.

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In this paper we have performed a spectroscopic study of the polymer–polymer complexes and polymer blends formed by mixing poly-acids [a series of poly(mono- n-alkyl itaconates)], and polybases [poly(2-vinyl pyridine) and poly(4-vinyl pyridine)]. The poly(mono- n-alkyl itaconates) are proton donors and the poly(vinyl pyridines) are good proton-acceptor polymers. Therefore, these pairs of polymers can interact via hydrogen bonding under given conditions. The obtained spectroscopic results point out the existence of hydrogen bonding in the studied systems. In addition to the qualitative hydrogen

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19

Ali, Korany A., Mokhles M. Abd-Elzaher, and Khaled Mahmoud. "Synthesis and Anticancer Properties of Silver(I) Complexes Containing 2,6-Bis(substituted)pyridine Derivatives." International Journal of Medicinal Chemistry 2013 (March 5, 2013): 1–7. http://dx.doi.org/10.1155/2013/256836.

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Several new 2,6-bis(substituted)pyridine ligands and 2,6-bis(substituted)pyridine Ag(I) nitrate complexes were synthesized and characterized spectroscopically. The newly synthesized ligands include pyridine-2,6-bis(3-oxopropanenitrile) (1), pyridine-2,6-bis(2-cyano-N-phenyl-3-oxopropanethioamide) (2), and pyridine-2,6-bis((E)-2-(2-phenylhydrazono)-3-oxopropanenitrile) (3). The newly synthesized ligands and silver(I) complexes were evaluated for their in vitro anticancer activity against four human cancer cell lines including hepatocellular carcinoma (HePG2), lung adenocarcinoma (A549), colon c

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20

Islam, Faridul, Jannat Al Foisal, Mahbubur Rahman, et al. "Antimicrobial Activity of Cu(II) and Fe(III) with Pyridine Complexes as Ligands Contrary to Clinical Strains of Bacteria and Fungi Species." Asian Journal of Chemistry 31, no. 10 (2019): 2323–26. http://dx.doi.org/10.14233/ajchem.2019.22096.

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In this study, green coloured Cu(II) and red coloured Fe(III) complexes of pyridine were prepared and the elemental characterization confirmed their composition. The pyridine complexes of Cu(II) and Fe(III) were found very interesting and attractive as potential candidates with antimicrobial activity. Along with this, melting point, molar conductivity measurement, magnetic moment determination, electronic and FTIR spectroscopy were also measured to characterize the prepared complexes. Pyridine acts as monodentate which resulted in formation of square planar and octahedral structure of Cu(II) a

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21

Sweety, Rathi, Maji Ankur, Singh Ovender, and Ghosh Kaushik. "Mononuclear iron complexes derived from tridentate ligands : Synthesis, characterization, DFT calculations and DNA interaction studies." Journal of Indian Chemical Society Vol. 92, Dec 2015 (2015): 1913–24. https://doi.org/10.5281/zenodo.5600125.

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Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247 667, Uttarakhand, India <em>E-mail </em>: ghoshfcy@iitr.ernet.in <em>Fax</em> : 91-1332-273560 Mononuclear iron(II)/(III) complexes derived from tridentate 3N donor ligands 1-phenyl-1-(pyridine-2-ylmethyl)- 2–(pyridine-2-ylmethylene)hydrazine (H-N<sub>3</sub>L) and 1-phenyl-2-(1-(pyridin-2-yl)ethylidene)-1-(pyridin-2-ylmethyl)hydrazine (Me-N<sub>3</sub>L) have been synthesized. Complexes Fe(H-N<sub>3</sub>L)Cl<sub>3</sub> (1), [Fe(H-N<sub>3</sub>L)<sub>2</sub> ](ClO<sub>4</sub> )<sub>2</sub> (2), Fe(Me-N<sub>3</

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22

Rubino, Simona, Rosa Alduina, Patrizia Cancemi, et al. "Mononuclear Perfluoroalkyl-Heterocyclic Complexes of Pd(II): Synthesis, Structural Characterization and Antimicrobial Activity." Molecules 25, no. 19 (2020): 4487. http://dx.doi.org/10.3390/molecules25194487.

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Two mononuclear Pd(II) complexes [PdCl2(pfptp)] (1) and [PdCl2(pfhtp)] (2), with ligands 2-(3-perfluoropropyl-1-methyl-1,2,4-triazole-5yl)-pyridine (pfptp) and 2-(3-perfluoroheptyl-1-methyl-1,2,4-triazole-5yl)-pyridine (pfhtp), were synthesized and structurally characterized. The two complexes showed a bidentate coordination of the ligand occurring through N atom of pyridine ring and N4 atom of 1,2,4-triazole. Both complexes showed antimicrobial activity when tested against both Gram-negative and Gram-positive bacterial strains.

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23

Hakimi, Mohammad, Zahra Mardani, Keyvan Moeini, Fabian Mohr, Esther Schuh, and Hooshang Vahedi. "Synthesis, Crystallographic and Spectral Characterization of a Cadmium Chloride Complex Containing a Novel Imidazo[1,5-a]Pyridine Derivative." Zeitschrift für Naturforschung B 67, no. 5 (2012): 452–58. http://dx.doi.org/10.5560/znb.2012-0064.

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The reaction between 2-(2-amino-ethylamino)ethanol and pyridine-2-carbaldehyde in a 1 : 3 molar ratio gave 3-(pyridin-2-yl)-1-(pyridin-2-ylmethyl)imidazo[1,5-a]pyridine (PPIP) which was characterized by elemental analysis and spectroscopic methods. The study of CSD-deposited structures revealed that PPIP is a new derivative of imidazo[1,5-a]pyridine. The cadmium chloride complex of this ligand [Cd(PPIP)Cl2][Cd(PPIP)Cl2]ʹ·3H2O (1) was prepared and identified by elemental analysis, FT-IR, Raman and 1H NMR spectroscopy, and single-crystal X-ray diffraction. In the crystal structure of 1, there ar

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Okawara, Toru, Masaaki Abe, Shiho Ashigara, and Yoshio Hisaeda. "Molecular structures, redox properties, and photosubstitution of ruthenium(II) carbonyl complexes of porphycene." Journal of Porphyrins and Phthalocyanines 19, no. 01-03 (2015): 233–41. http://dx.doi.org/10.1142/s1088424614501120.

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Two ruthenium(II) carbonyl complexes of porphycene, (carbonyl)(pyridine)(2,7,12,17-tetra-n-propylporphycenato)ruthenium(II) (1) and (carbonyl)(pyridine)(2,3,6,7,12,13,16,17-octaethylpor-phycenato)ruthenium(II) (2), have been structurally characterized by single-crystal X-ray diffraction analysis. Cyclic voltammetry has revealed that the porphycene complexes undergo multiple oxidations and reductions in dichloromethane and the reduction potentials are highly positive compared to porphyrin analogs. UV-light irradiation (400 nm or shorter wavelength region) of a benzene solution of 1 and 2 contai

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Cibulka, Radek, Ivana Císařová, Jan Ondráček, František Liška, and Jiří Ludvík. "Electrochemical Reductions of Ni2+, Cu2+ and Zn2+ Complexes of Azinyl Methyl Ketoximes on Mercury." Collection of Czechoslovak Chemical Communications 66, no. 1 (2001): 170–84. http://dx.doi.org/10.1135/cccc20010170.

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Electroreductions of Ni2+, Cu2+ and Zn2+ complexes of azinyl (pyridin-2-yl, pyridazin-3-yl, pyrimidin-2-yl, pyrimidin-4-yl, pyrazinyl) methyl ketoximes on mercury electrode were studied using dc polarography. Three different types of complex behavior on the mercury electrode were observed: In the Ni2+ complexes, the hydroxyimino group of the ligand is reduced, whereas in the Cu2+ complexes, the reduction proceeds on the metal ion. With Zn2+ complex of methyl pyridin-2-yl ketoxime, only reduction waves of the uncoordinated ligand and metal were observed due to a rapid decomplexation pre-equilib

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Sharmila, A., P. Thamizhini, and K. Lakshmi Prabha. "SYNTHESIS, SPECTRAL AND BIOLOGICAL STUDIES ON TRANSITION METAL COMPLEXES OF (Z)-2-(METHYLTHIO)-N-(PYRIDIN-2- YLMETHYLENE)ANILINE." Rasayan Journal of Chemistry, Special (2021): 180–87. http://dx.doi.org/10.31788/rjc.2021.1456643.

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The new Schiff base ligand (Z)-2-(methylthio)-N-(pyridin-2-ylmethylene)aniline MPMA derived from pyridine-2- carboxaldehyde and 2- (methylthio) aniline and its Cu(II), Co(II) and Zn(II) metal complexes were prepared and characterized by spectral, magnetic and electrochemical studies. The spectral studies revealed that the ligand MPMA was tridentate and coordinated to the metal through azomethine nitrogen atom, pyridine nitrogen atom and sulphur atom from amine, forming octahedral geometry for Cu2+,Co2+ and tetrahedral geometry for Zn2+ ions. It was further supported by molar conductance measur

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Lang, Johannes, Daniela V. Fries, and Gereon Niedner-Schatteburg. "Characterization of Trinuclear Oxo Bridged Cobalt Complexes in Isolation." Zeitschrift für Physikalische Chemie 232, no. 5-6 (2018): 649–69. http://dx.doi.org/10.1515/zpch-2017-1046.

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AbstractThis study elucidates molecular structures, fragmentation pathways and relative stabilities of isolated trinuclear oxo bridged cobalt complexes of the structural type [Co3O(OAc)6(Py)n]+(OAc=acetate, Py=pyridine, n=0, 1, 2, 3). We present infrared multiple photon dissociation (IR-MPD) spectra in combination with quantum chemical calculations. They indicate that the coordination of axial pyridine ligands to the [Co3O(OAc)6]+subunit disturbs the triangular geometry of the Co3O core. [Co3O(OAc)6]+exhibits a nearly equilateral triangular Co3O core geometry. The coordination of one or two py

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Wu, Xiuli, Rufei Ye, Ai-Quan Jia, Qun Chen, and Qian-Feng Zhang. "Syntheses, Crystal Structures and Electrochemical Properties of Acetylacetonato-Ruthenium Complexes Containing Substituted Pyridine Ligands." Zeitschrift für Naturforschung B 68, no. 9 (2013): 993–99. http://dx.doi.org/10.5560/znb.2013-2344.

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Treatment of Ru(acac)3 with 2-cyano-pyridine and 3,5-dimethyl-pyridine in the presence of zinc dust as reducing agent in refluxing THF afforded the ruthenium(II) complexes cis-[RuII(acac)2(2- CN-py)2] (1) and cis-[RuII(acac)2(3,5-Me2-py)2] (2), respectively. Interaction of Ru(acac)3 with 3- Me-pyridine and 3,5-Me2-pyridine in the presence of Br2 in refluxing THF gave the ruthenium(III) complexes [RuIII(acac)Br2(3-Me-py)2] (3) and [RuIII(acac)Br2(3,5-Me2-py)2] (4), respectively. The four complexes have been spectroscopically and electrochemically characterized, and their crystal and molecular s

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29

Hvastijová, M., J. Kohout, J. W. Buchler, H. W. Katzenmeier, J. Kožíšek, and C. Didierjean. "Crystallographic and Spectroscopic Evidence of O-Bonding in 3d-MetaI Dicyanomethanidonitrite Complexes." Zeitschrift für Naturforschung B 56, no. 1 (2001): 100–104. http://dx.doi.org/10.1515/znb-2001-0117.

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Abstract The coordination of the dicyanomethanidonitrite group through the nitroso oxygen atom in the tetrakis(pyridine) complexes [M{ONC(CN)2}2(py)4], M = Ni, Co, Cu, and in the bis(pyridine) complex [Cu{ONC(CN)2}2(py)2] was proved by X-ray crystallography of the Ni11 complex and re-evaluated infrared spectra. The Ni11 and Co11 complexes exhibit almost octahedral structures composed of four pyridine nitrogen atoms and two oxygen atoms of dicyanomethanidonitrite ions. Both copper(II) complexes display a considerable axial distortion of the pseudooctahedral arrangement. In the bis(pyridine) Cu1

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30

MaGee, Karen D. M., Guy Travers, Brian W. Skelton, Massimilliano Massi, Alan D. Payne, and David H. Brown. "Synthesis, Solid-state Structures, Solution Behaviour and Catalysis Studies of Nickel Complexes of Bis(benzimidazolin-2-ylidene)pyridine Pincer Ligands." Australian Journal of Chemistry 65, no. 7 (2012): 823. http://dx.doi.org/10.1071/ch12044.

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N-Heterocyclic carbene–nickel complexes with five- and four-coordinate geometries [(CNC)NiBr2] and [(CNC)NiBr]X (X = PF6 or BPh4) have been prepared with the pincer ligands 2,6-bis(N-octylbenzimidazolin-2-ylidene)pyridine and 2,6-bis(N-butyl-5,6-dimethoxybenzimidazolin-2-ylidene)pyridine. The addition of the n-octyl substituent significantly extends the solubility of the complexes and has allowed UV-vis solution studies of the complexes in dichloromethane and methanol. The four- and five-coordinate species exist in equilibrium in solution and this equilibrium has been explored by UV-vis studie

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31

von der Heiden, Daniel, Kari Rissanen, and Máté Erdélyi. "Asymmetric [N–I–N]+ halonium complexes in solution?" Chemical Communications 56, no. 92 (2020): 14431–34. http://dx.doi.org/10.1039/d0cc06706g.

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Assessment of the solution equilibria of [bis(pyridine)iodine(i)]<sup>+</sup> complexes by ESI-MS and NMR reveals a statistical ligand distribution across the iodine(i) centres with a preference to form complexes with a more basic pyridine.

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32

Pazderski, Leszek, and Pavel A. Abramov. "Au(III) Cyclometallated Compounds with 2-Arylpyridines and Their Derivatives or Analogues: 34 Years (1989–2022) of NMR and Single Crystal X-ray Studies." Inorganics 11, no. 3 (2023): 100. http://dx.doi.org/10.3390/inorganics11030100.

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A review paper on Au(III) cyclometallated compounds with 2-arylpyridines (2-phenylpyridine, 2-benzylpyridine, 2-benzoylpyridine, 2-phenoxypyridine, 2-phenylsulfanylpyridine, 2-anilinopyridine, 2-(naphth-2-yl)pyridine, 2-(9,9-dialkylfluoren-2-yl)pyridines, 2-(dibenzofuran-4-yl)pyridine, and their derivatives) and their analogues (2-arylquinolines, 1- and 3-arylisoquinolines, 7,8-benzoquinoline), with 113 references. A total of 554 species, containing κ2-N(1),C(6′)*-Au(III), or analogous moiety (i.e., chelated by nitrogen of the pyridine-like ring and the deprotonated ortho- carbon of the phenyl

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33

Stritt, Anika, E. Alper Ünal, Elisabeth Irran, and Andreas Grohmann. "“Coordination caps” of graded electron-donor capacity." Zeitschrift für Naturforschung B 79, no. 12 (2024): 705–22. https://doi.org/10.1515/znb-2024-0093.

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Abstract An efficient synthesis of the novel {6-[1,1-di(pyridin-2-yl)ethyl]pyridine-2-yl}2-methyl-1,3-propanediamine (2) is reported, as well as a reliable large-scale synthesis (of the order of 100 g) of previously known 2,2’-[1-(6-chloropyridin-2-yl)ethane-1,1-diyl]dipyridine (4); the latter is the starting material for the preparation of the former, as well as a multitude of other polypodal polyamine/polyimine ligands. Both materials, as well as the intermediates in their multi-step syntheses, have been fully characterised. Ligand 2, in conjunction with ligands 2,2’-(pyridine-2,6-diyl)bis(2

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34

Tarafder, M. Tofazzal H., Wan M. Z. W. Yunus, and Sidik Silong. "Some Organoperoxo Complexes of Tin(IV)." Australian Journal of Chemistry 50, no. 3 (1997): 229. http://dx.doi.org/10.1071/c96141.

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Some novel organoperoxo complexes of tin were prepared by the oxidative addition of dioxygen with Sn 2+. These are the first reported examples of this kind. The complexes isolated have the compositions [Sn(O2)2.2L], [Sn(O2)2L′], [Sn(O2)L′′2], [Sn(O2)C5H3N(COO)2H2O] and [Sn(O2)2L′′′] (L = pyridine, pyridine N-oxide, triphenylphosphine oxide, aniline; L′ = ethylenediamine, 2-aminopyridine, o-phenylenediamine; L′′ = pyridine-2-carboxylato, 2-aminophenolato, quinolin-8-olato, glycinato; L′′′ = diethylenetriamine and triethylenetetramine). The complexes were characterized by elemental analysis, con

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35

Szafran, Miroslaw, and Zofia Dega-Szafran. "Complexes of Carboxylic Acids with Pyridines and Pyridine N-Oxides." HETEROCYCLES 37, no. 1 (1994): 627. http://dx.doi.org/10.3987/rev-93-sr5.

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36

Ariunbold, Gombojav O., Bryan Semon, Supriya Nagpal, and Prakash Adhikari. "Coherent Anti-Stokes–Stokes Raman Cross-Correlation Spectroscopy: Asymmetric Frequency Shifts in Hydrogen-Bonded Pyridine-Water Complexes." Applied Spectroscopy 73, no. 9 (2019): 1099–106. http://dx.doi.org/10.1177/0003702819857771.

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Hydrogen bonding is a vital molecular interaction for bio-molecular systems, yet deep understanding of its ways of creating various complexes requires extensive empirical testing. A hybrid femtosecond/picosecond coherent Raman spectroscopic technique is applied to study pyridine-water complexes. Both the coherent Stokes and anti-Stokes Raman spectra are recorded simultaneously as the concentration of water in pyridine varied. A 3 ps and 10 cm−1 narrowband probe pulse enables us to observe well-resolved Raman spectra. The hydrogen bonding between pyridine and water forms the complexes that have

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37

Steel, Peter J., and Christopher M. Fitchett. "Flexibility in the Self-Assembly of Silver Complexes: Coordination Polymers from Multi-Armed Pyridylmethyleneoxy Ligands." Australian Journal of Chemistry 66, no. 4 (2013): 443. http://dx.doi.org/10.1071/ch12464.

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The syntheses of new silver complexes of five isomeric bis(pyridylmethyleneoxy)benzenes, differing in the position of substitution on the benzene and pyridine rings, and three isomeric 1,3,5-tris(pyridylmethyleneoxy)benzenes, differing in the position of substitution on the pyridine ring, are described. The structures of six of these complexes were characterised using X-ray crystallography, showing the formation of coordination polymers for 3-pyridyl- and 4-pyridyl-armed ligands and discrete complexes for 2-pyridyl-armed ligands. The precise nature of the structure was further determined by th

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38

Baker, AT, and HA Goodwin. "Iron(II) and Nickel(II) Complexes of 2,6-Di(Thiazol-4-Yl)Pyridine and Related Ligands: Magnetic, Spectral and Structural Studies." Australian Journal of Chemistry 39, no. 2 (1986): 209. http://dx.doi.org/10.1071/ch9860209.

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2,6-Di(thiazol-4-yl)pyridine (1a), 2,6-di(2-methylthiazol-4-yl)pyridine (1b) and 2,6-di(2-phenylthiazol-4-yl)pyridine (1c) have been prepared by Hantzsch syntheses from 2,6-di(ω- bromoacetyl )pyridine and the appropriate thioamide. Bis ( ligand ) iron(II) and nickel(II) complexes of (1a) and (1b) have been prepared but no metal complexes of (1c) were isolated. The bis ( ligand ) iron(II) complexes of (1a) are low-spin whereas those of (1b) undergo thermally induced spin-transitions, both in the solid state and solution. The field strengths of the ligands , determined from the spectra of their

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39

Dammann, Wiebke, Tabea Buban, Carl Schiller, and Peter Burger. "Dinuclear tethered pyridine, diimine complexes." Dalton Transactions 47, no. 35 (2018): 12105–17. http://dx.doi.org/10.1039/c8dt02347f.

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40

Kumar, Sushil, Shweta Soam, Sulekh Chandra, and Hariom Kumar Kaushik. "AZAMACROCYCLIC Cr(III) COMPLEXES: SYNTHESIS AND SPECTROSCOPIC STUDIES." RASAYAN Journal of Chemistry, Special Issue (2022): 280–84. http://dx.doi.org/10.31788/rjc.2022.1558155.

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The new tetra dentate aza-macrocyclic ligands LA prepared by 2,6 –diamino pyridine and 3-methyl-2,4-pentadione, Ligand LB prepared by 2,6-diamino-pyridine and 3-ethyl-2,4-pentadione, Ligand LC was prepared with the reaction of 5-bromo-2,3-diamino-pyridine with. 3-methyl-2,4-pentadione and Ligand LD were prepared with the reaction of 5-bromo-2,3-diamino-pyridine with 3-ethyl-2,4-pentadione. Ethyl Alcohol was used in the preparation of ligands as a solvent. All the Ligands were characterized with the help of elemental and spectral studies. Cr(III) complexes were prepared with these newly synthes

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41

Li, Jinghua, and Lushan Wang. "Elucidation of the Mechanism for the S - N-type Smiles Rearrangement on Pyridine Rings." Australian Journal of Chemistry 62, no. 2 (2009): 176. http://dx.doi.org/10.1071/ch08205.

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The Smiles rearrangement (SR) is an important strategy for synthesizing heterocyclic compounds. Many pyridine moiety-containing complexes are biologically active. Although the success has been archived in the development of the SR on the pyridine ring to obtain pyridine moiety-containing heterocyclic compounds, not much is known about the detailed SR mechanism. Here, we report a theoretical study on a typical S–N-type SR reaction involved in the synthesis of thiazinone-fused pyridines. We studied both the ipso-SR process and the direct nucleophilic substitution reactions on the ortho-positions

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42

Yamajala, Rajesh B. R. D. "Synthesis and characterization of penta-coordinated 2- and 4-substituted pyridine N-oxide silicon complexes." Mapana Journal of Sciences 19, no. 2 (2020): 11–19. http://dx.doi.org/10.12723/mjs.53.2.

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Novel penta-coordinated 2- and 4-substituted pyridine N-oxide silicon complexes were synthesized by the reaction of various 2- and 4-substituted pyridine N-oxides with silicon pinacolate. These complexes were characterized by 29Si NMR, 1H NMR and 13C NMR spectroscopy. The objectives of the present work is the study of influence of substitution at either 4 or 2-position of the pyridine N-oxide on the effect of the profile of pentacoordination.

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43

Hossain, M. S., C. M. Zakaria, and M. K. Zahan. "Synthesis and Characterization with Antimicrobial Activity Studies on some Transition Metal Complexes of N, O Donor Novel Schiff Base Ligand." Journal of Scientific Research 9, no. 2 (2017): 209–18. http://dx.doi.org/10.3329/jsr.v9i2.29780.

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Metal complexes of Mn(II), Fe(II), Co(II) and Cd(II) ions with Schiff base ligand 4-{(pyridin-2-ylimino)methyl}phenol derived from condensation of 2-amino pyridine with 4-hydroxybenzaldehyde was prepared. The ligand and complexes were isolated from the reaction in the solid form and characterized by conductivity, magnetic moment, TLC, IR, UV-Visible, thermal analysis and some physical measurements. During complexation reaction with transition metal ions Schiff base act as a deprotonated tridentate ligand and IR spectra showed that N and O atoms are coordinated to the central metal atom. The ob

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44

Baker, AT, DC Craig, G. Dong, and AD Rae. "Metal Complexes of 1,3-Bis(Pyridin-2-yl)pyrazole: Spectral, Magnetic and Structural Studies." Australian Journal of Chemistry 48, no. 6 (1995): 1071. http://dx.doi.org/10.1071/ch9951071.

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Bis(ligand)iron(II) and nickel(II) complexes of the asymmetric tridentate ligand 1,3-bis(pyridin-2-yl) pyrazole , L, have been prepared. The iron(II) complex, [FeL2] [PF6]2, is high-spin in the solid state over the temperature range 304-102 K, with a magnetic moment of 5.27 BM at room temperature. The crystal structure of bis (1,3-bis(pyridin-2-yl) pyrazole )iron(II) bis (hexafluorophosphate ) has been determined by single-crystal X-ray diffractometry. The compound crystallized as yellow prisms, with the structure being disordered in the tetragonal space group P421c with Z = 2. Crystal data a

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45

Dias, H. V. Rasika, and Abhijit Pramanik. "Nickel(II) carbonyl, ammonia, and acetonitrile complexes supported by a pyridine dipyrrolide pincer ligand." Acta Crystallographica Section E Crystallographic Communications 76, no. 11 (2020): 1741–47. http://dx.doi.org/10.1107/s2056989020013341.

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The synthesis, isolation and crystal structures of nickel(II) carbonyl, acetonitrile and ammonia complexes supported by a dianionic, pyridine dipyrrolide pincer ligand [pyrr2py]2−, namely, carbonyl[2,2′-(pyridine-2,6-diyl)bis(3,5-di-p-tolylpyrrolido-κN)]nickel(II), [Ni(C41H33N3)(CO)], ammine[2,2′-(pyridine-2,6-diyl)bis(3,5-di-p-tolylpyrrolido-κN)]nickel(II), [Ni(C41H33N3)(NH3)], and (acetonitrile-κN)[2,2′-(pyridine-2,6-diyl)bis(3,5-di-p-tolylpyrrolido-κN)]nickel(II), [Ni(C41H33N3)(CH3CN)], as well as the free ligand 2,6-bis(3,5-di-p-tolylpyrrol-2-yl)pyridine, C41H35N3 or [pyrr2py]H2 are report

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46

Kumar, Birendra, Rekha Rani, Dayanand Prasad, Praveen Kumar Singh, Amit Kumar, and Shivadhar Sharma. "Electronic Structure and Spectral Study of Some Five Coordinate Complexes of Copper (II)." Oriental Journal Of Chemistry 35, no. 4 (2019): 1463–68. http://dx.doi.org/10.13005/ojc/350430.

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1-phenylazo-2-nephthol has been synthesized and used for complexation with Cu(II) metal ion along with pyridine, α-picoline, β- picoline, γ-picoline and water as secondary ligands. On the basis of elemental analysis and molar conductivity complexes were formulated as CuL2X [Where L is the prime ligand i.e 1-phenyl-azo-2-nephthol and X is the secondary ligand i.e. pyridine, α-picoline, β-picoline, and H2O.] The magnetic moment of these complexes (1.80 - 1.83 BM) indicates that these complexes are magnetically dilute. The appearance of 3 bands in the electronic spectra of complexes rules out the

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47

Ponikwar, Walter, and Wolfgang Beck. "Metallkomplexe mit biologisch wichtigen Liganden, CLI [1]. Metallorganische Komplexe mit R-3-(3-Pyridyl)alaninat." Zeitschrift für Naturforschung B 58, no. 4 (2003): 318–23. http://dx.doi.org/10.1515/znb-2003-0411.

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Reactions of chloro bridged complexes with R-3-(3-pyridyl)alanine afford the chelate complexes LnM[NH2CH(CO2)CH2C5H4NH+]Cl− (LnM = Ph3P(Cl)Pd, (tol3P)(Cl)Pd, (Ph-pyridyl)2Ir, Cp٭(Cl)Rh, Cp٭(Cl)Ir, (p-Cymol)(Cl)Ru) with protonated pyridine substituents. An analogous Cp٭Rh complex with 3-(2-pyridyl)alaninate was also obtained. Addition of base (NaOMe) to these complexes gives dimeric and trimeric complexes with coordination of the pyridine N atom.

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48

L., D. DAVE, MATHEW CHERIAN, and OOMMEN VARUGHESE. "Copper(II) Complexes of 3-N-Aryl Substitute Thioquinazolones." Journal of Indian Chemical Society Vol. 63, Mar 1986 (1986): 273–75. https://doi.org/10.5281/zenodo.6240380.

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University Department of Chemistry, Bhavnagar University, Bhavnagar-364 002 <em>Manuscript received 18 March 1985, accepted 2 December 1985</em> Cu<sup>II</sup> complexes and their pyridine adducts of 3-phenyl/p-tolyl/p-methoxyphenyl/<em>p-</em> ethoxyphenyl/<em>p</em>-chlorophenyl/<em>p</em>-bromophenyl-quinazoline-2-thione-4-one (HL) are prepared. Elemental analysis, magnetic and spectral data show that the copper complexes without pyridine have square-planar structure and the pyridine adducts have tetragonal structure.

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49

Naziruddin, Abbas Raja, Anzhela Galstyan, Adriana Iordache, Constantin G. Daniliuc, Cristian A. Strassert, and Luisa De Cola. "Bidentate NHC^pyrozolate ligands in luminescent platinum(ii) complexes." Dalton Transactions 44, no. 18 (2015): 8467–77. http://dx.doi.org/10.1039/c4dt03651d.

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50

Samantray, Sagarika, Sreenivasulu Bandi, and Dillip K. Chand. "Design of a double-decker coordination cage revisited to make new cages and exemplify ligand isomerism." Beilstein Journal of Organic Chemistry 15 (May 21, 2019): 1129–40. http://dx.doi.org/10.3762/bjoc.15.109.

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The complexation study of cis-protected and bare palladium(II) components with a new tridentate ligand, i.e., pyridine-3,5-diylbis(methylene) dinicotinate (L1) is the focus of this work. Complexation of cis-Pd(tmeda)(NO3)2 with L1 at a 1:1 or 3:2 ratio produced [Pd(tmeda)(L1)](NO3)2 (1a). The reaction mixture obtained at 3:2 ratio upon prolonged heating, produced a small amount of [Pd3(tmeda)3(L1)2](NO3)6 (2a). Complexation of Pd(NO3)2 with L1 at a 1:2 or 3:4 ratios afforded [Pd(L1)2](NO3)2 (3a) and [(NO3)2@Pd3(L1)4](NO3)4 (4a), respectively. The encapsulated NO3 – ions of 4a undergo anion exc

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