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Journal articles on the topic 'Tetranuclear nickel(II) complex'

Author: Grafiati

Published: 5 June 2025

Last updated: 24 June 2025

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1

Roy, Sourav, Arka Dey, Michael G. B. Drew, Partha Pratim Ray, and Shouvik Chattopadhyay. "A tetranuclear nickel/lead complex with a salen type Schiff base: synthesis, structure and exploration of photosensitive Schottky barrier diode behaviour." New Journal of Chemistry 43, no. 13 (2019): 5020–31. http://dx.doi.org/10.1039/c8nj05616a.

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A tetranuclear nickel(ii)/lead(ii) complex has been synthesized and characterized. The complex based device behaves as a Schottky diode. The charge transfer kinetics of the complex is enhanced after light soaking.

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2

Bhattacharyya, Anik, Mithun Das, Antonio Bauzá, et al. "Both end-on and end-to-end azide bridged tetranuclear ferromagnetic nickel(ii) Schiff base complexes." New Journal of Chemistry 41, no. 22 (2017): 13585–92. http://dx.doi.org/10.1039/c7nj00852j.

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Variable temperature magnetic measurement of a tetranuclear nickel(ii) complex, consisting of two pseudo-dinuclear entities, indicates the presence of intra- and inter-dinuclear ferromagnetic interactions, corroborated by DFT calculations.

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3

Traoré, Bocar, Thierno Moussa Seck, Mohamed Lamine Sall, et al. "Synthesis, Crystal Structure Determination and Magnetic Study of a New [2 × 2] Grid Tetranuclear Fe(II) and Ni(II) Complexes Derived from the Ligand 1, 5-Bis(1-(Pyridin-2-Yl) Ethylidene) Carbonohydrazide)." International Research Journal of Pure and Applied Chemistry 24, no. 4 (2023): 50–67. http://dx.doi.org/10.9734/irjpac/2023/v24i4819.

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Complexes of nickel (II) and iron (III) are easily synthetized using the symmetrical ligand 1,5-bis(1-(pyridin-2-yl)ethylidene)carbonohydrazide) (H2L) and metal nitrate salts. Square [2x2] grids structure of one tetranuclear iron and one tetranuclear nickel complex were isolated. X ray diffraction analysis reveals that the crystal structures of the two complexes are similar. The asymmetric unit of each complex consists of four cationic ligand molecules and four metal ions. Each ligand acts in its monodeprotonated form through five coordination sites such as two pyridine nitrogen atoms, two azomethine nitrogen atoms and one oxygen atom. Each of the four ligand molecules acts as a bridge between two metal ions yielding a square 2 x 2 grid structure. Each of the metal ion is hexacoordinated and is situated in a N4O2 core and the environment is best described as a severely distorted square bipyramidal geometry. Electrochemical studies show two electrons process for complex 1 and one electron process for complex 2. Variable temperature magnetic study shows that antiferromagnetic coupling is stronger in the nickel(II) than in the iron(II) complex. Perfect correlation between the magnetic properties and the crystallographic data are observed in both complexes.

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4

Zhang, Feng, Yun Chen, Jia-Nan Feng, Jian-Hua Sun, and Ching-Cheng Huang. "Structure and magnetism of a linear tetranuclear nickel complex ligated by compartmental ligand." Bulletin of the Chemical Society of Ethiopia 39, no. 4 (2025): 781–89. https://doi.org/10.4314/bcse.v39i4.13.

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A new nickel(II) complex [Ni4L3(acac)2(H2O)2]·2DMF·Et2O (1) (acac = acetylacetonate, and DMF = N,N′-dimethylformamide) was isolated in solid crystalline form with the reaction of nickel(II) acetylacetonate and compartmental Schiff base ligand 1,2-bis(2-hydroxy-3-methoxybenzylidene) hydrazine (H2L). Single crystal X-ray analysis showed that the complex has a linear tetranuclear structure. In the complex, an unusual μ3– and μ4–bridging modes of Ligand L2- were coexisting. Variable-temperature magnetic studies revealed that weak antiferromagnetic interaction exists between the nickel(II) ions coupling through phenoxide−O atoms and −N−N− bridging moieties. Bull. Chem. Soc. Ethiop. 2025, 39(4), 781-789. DOI: https://dx.doi.org/10.4314/bcse.v39i4.13

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5

Lozan, Vasile. "Stabilization of Unusual Substrate Coordination Modes in Dinuclear Macrocyclic Complexes." Chemistry Journal of Moldova 5, no. 1 (2010): 24–35. http://dx.doi.org/10.19261/cjm.2010.05(1).02.

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The steric protection offered by the macrobinucleating hexaazaditiophenolateligand (L) allows for the preparation of the first stable dinuclear nickel(II) borohydride bridged complex, which reacts rapidly with elemental sulphur producing a tetranuclear nickel(II) complex [{(L)Ni2}2(μ-S6)]2+ bearing a helical μ4-hexa- sulfide ligand. The [(L)CoII 2]2+ fragment have been able to trap a monomethyl orthomolybdate in the binding pocket. Unusual coordination modes of substrate in dinuclear macrocyclic compounds was demonstrated.

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6

Yu, Gui-Miao, Lang Zhao, Li-Fei Zou, et al. "A Tetranuclear Nickel(II) Cubane Complex with O-Vanillin Ligand." Journal of Chemical Crystallography 41, no. 5 (2010): 606–9. http://dx.doi.org/10.1007/s10870-010-9932-2.

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7

Dong, Xindian, Xiaoyong Wang, Yafeng He, et al. "Reversible DNA Condensation Induced by a Tetranuclear Nickel(II) Complex." Chemistry - A European Journal 16, no. 47 (2010): 14181–89. http://dx.doi.org/10.1002/chem.201001457.

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8

Achiwawanich, Supakit, Tanwawan Duangthongyou, Panana Kitiphaisalnont, and Sutatip Siripaisarnpipat. "Tetranuclear nickel complex of dimethylene bridged diiminedioxime containing different hybridizations of nickel (II)." Journal of Molecular Structure 1072 (August 2014): 149–52. http://dx.doi.org/10.1016/j.molstruc.2014.04.090.

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9

Bizilj, K., SG Hardin, BF Hoskins, PJ Oliver, ERT Tiekink, and G. Winter. "The Structure of the Tetranuclear Cubane-Like Nickel(II) Xanthate Alkoxide [Ni(C2H5OCS2)-(C5H4NCH2O)]4 as Its Acetone Solvate, an Example of a Non-Reversible Inclusion Compound." Australian Journal of Chemistry 39, no. 7 (1986): 1035. http://dx.doi.org/10.1071/ch9861035.

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The crystal structure of the acetone solvate of a mixed ligand tetranuclear nickel(II) complex involving the pyridine-2-methoxide ( pym ) and 0-ethylxanthate (exa) anions has been determined by X-ray diffraction methods. Crystals of [Ni (exa)( pym )]4.Me2CO are triclinic, space group Pī , a 13.825(2), b 15.606(3), c 12.288(2)Ǻ, α 101.16(2), β 101.38(1), γ 85.80(1)°, with Z 2; R and Rw were 0.056 and 0.057 respectively for 4,771 unique reflections for which I ≥ 3σ(I). The structure consists of tetranuclear cubane -like clusters with four nickel and four oxygen atoms arranged at alternate corners of a distorted cube. The discrete molecules of occluded acetone are located in cavities defined by the [Ni( exa )( pym )]4 units.

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10

Xie, K. F., L. L. Li, W. D. Li, X. Xu, and W. K. Dong. "A novel tetranuclear nickel(II) salamo-based complex adopting two open cubic structures: synthesis, chracterization, DFT calculation, Hirshfeld analysis, and fluorescent properties." Журнал структурной химии 62, no. 6 (2021): 945–57. http://dx.doi.org/10.26902/jsc_id74421.

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A novel tetranuclear Ni(II) complex [Ni4(L)2(N3)4Cl(MeOH)3]·CH3COCH3 is synthesized via a symmetrical salamo-based ligand H2L, NiCl2·6H2O, and NaN3. The structure is characterized by elemental analyses, IR and UV-Vis spectroscopy, and X-ray diffraction analysis. The X-ray crystal analysis shows that Ni(II) atoms in the Ni(II) complex have distorted octahedral geometries. It is the key factor that the ligand containing 3-position methoxy groups gives rise to the formation of the tetranuclear Ni(II) complex. When NO3– anions are used to bridge two Ni2 atoms, there are two symmetrical open cubic structures. The Ni(II) complex forms a 3D supramolecular structure through intermolecular hydrogen bond interactions. Using the Hirshfeld surface to clarify interactions between the molecules, the percentages of C—H/H—C, O—H/H—O, and H—H/H—H contacts are calculated as 19.0 %, 15.3 %, and 54.0 %, respectively. Density functional theory (DFT) studies show that the stability of the Ni(II) complex is much higher than that of H2L. The calculation of the fluorescence titration experiment can give K = 1.05·108 M–1, which further proves the stability of the Ni(II) complex.

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11

Azadi, Gouhar, Zahra Zand, Younes Mousazade, et al. "A tetranuclear nickel(II) complex for water oxidation: Meeting new challenges." International Journal of Hydrogen Energy 44, no. 5 (2019): 2857–67. http://dx.doi.org/10.1016/j.ijhydene.2018.12.059.

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12

Patel, R. N., S. K. Patel, A. K. Patel, N. Patel, and Ray J. Butcher. "A tetranuclear nickel(II) complex, [Ni₄(L)₄](ClO₄)₄·C₂H₃N·2H₂O, with an asymmetric Ni₄O₄ open-cubane-like core." Acta Crystallographica Section E Crystallographic Communications 78, no. 2 (2022): 98–102. http://dx.doi.org/10.1107/s2056989021012408.

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A tetranuclear complex with an open-cubane-like core structure was synthesized from 2-methoxy-6-(pyridin-2-yl-hydrazonomethyl)phenol (HL), namely, cyclo-tetrakis(μ-2-methoxy-6-{[2-(pyridin-2-yl)hydrazin-1-ylidene]methyl}phenolato)tetranickel(II) tetrakis(perchlorate) acetonitrile monosolvate dihydrate, [Ni4(C13H12N3O2)4](ClO4)4·C2H3N·2H2O, and characterized using micro-analytical and spectroscopic techniques. The crystal-structure determination reveals the formation of a distorted Ni4O4 cubane-like core architecture encapsulated by four hydrazone Schiff base (HL) molecules. A open-cube tetranuclear architecture is created in which nickel(II) ions of the NiN2O3 unit are connected by μ2-O anions of the phenolate moiety of HL. In this complex, each Ni centre has a slightly distorted square-pyramidal coordination environment. The supramolecular architectures are stabilized via the presence of various intermolecular hydrogen bonds and (aryl–aryl, aryl–chelate and chelate–chelate) stacking interactions.

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13

Pijush, Malpaharia, Pramanik Koushik, and K. Chandra Swapan. "A rare triple end-on bridges [Ni4 ] compound with shortest Ni....Ni separation : Synthesis, characterization, structure and magnetic behaviour." Journal of Indian Chemical Society Vol. 92, Dec 2015 (2015): 1839–45. https://doi.org/10.5281/zenodo.5599553.

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Department of Chemistry, Visva-Bharati University, Santiniketan-731 235, Birbhum, West Bengal, India <em>E-mail</em> : drswapan63@gmail.com A tetranuclear nickel(II) complex, [Ni<sub>4</sub> (L2)2 (N<sub>3</sub> )8 (CH<sub>3</sub>CN)<sub>2</sub> ].4CH<sub>3</sub>CN (1), has been synthesized by employing three end-on (µ<sub>1,1</sub>-N<sub>3</sub> ) azido anions supported by polydentate flexible ligand. The compound has been characterized by analytical and spectroscopic results, along with magnetostructural studies. Single-crystal X-ray diffraction studies suggest that the compound is a rare example of triple end-on (µ<sub>1,1</sub>-N<sub>3</sub> ) azido bridged nickel(II) species, with very short Ni...Ni separation and very low Ni-N-Ni angle with promising ferromagnetic interactions.

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14

Pavlović, Gordana, Mihael Majer та Marina Cindrić. "A tetranuclear cubane-like nickel(II) complex with a tridentate salicylideneimine Schiff base ligand: tetrakis[μ3-4-methyl-N-(2-oxidophenyl)salicylideneiminato]tetrakis[methanolnickel(II)] methanol 0.8-solvate". Acta Crystallographica Section E Crystallographic Communications 72, № 12 (2016): 1776–79. http://dx.doi.org/10.1107/s2056989016017722.

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The tetranuclear title complex, [Ni4(C14H11NO2)4(CH3OH)4]·0.8CH3OH, has a distorted cubane topology shaped by four Schiff base ligands. The cubane [Ni4(μ3-O4)] core is formedviathe O atoms from the Schiff base ligands. The octahedrally coordinated NiIIions occupy alternating vertices of the cube. Each NiIIion is coordinated by oneO,N,O′-tridentate dianionic ligand, two O atoms of oxidophenyl groups from adjacent ligands and the O atom of a coordinating methanol molecule. The cubane core is stabilizedviaan intramolecular O—H...O hydrogen bond between the hydroxy group of the coordinating methanol molecules and the phenolate O atom of the aldehyde Schiff base fragment. Additional stabilization is obtainedviaintramolecular C—H...O hydrogen bonds involving aromatic C—H groups and the oxygen atoms of adjacent methanol molecules. In the crystal, complex molecules are linked into chains parallel to thecaxisviaweak C—H...O hydrogen bonds. The partial-occupancy disordered methanol solvent molecule has a site occupancy of 0.8 and is linked to the tetranuclear unitviaan intermolecular C—H...O hydrogen bond involving a phenolate O atom.

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15

Saha, Sudeshna, Souvik Pal, Carlos J. Gómez-García, Juan M. Clemente-Juan, Klaus Harms, and Hari Pada Nayek. "A ferromagnetic tetranuclear nickel(II) Schiff-base complex with an asymmetric Ni4O4 cubane core." Polyhedron 74 (May 2014): 1–5. http://dx.doi.org/10.1016/j.poly.2014.02.036.

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16

Mikuriya, Masahiro, Kenichi Minowa, and Nobuyuki Nagao. "Ferromagnetic coupling between an alkoxo-bridged dinickel(II) pair in a mixed-spin tetranuclear nickel(II) complex." Inorganic Chemistry Communications 4, no. 8 (2001): 441–43. http://dx.doi.org/10.1016/s1387-7003(01)00239-8.

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17

Mirdya, Saikat, Antonio Frontera, and Shouvik Chattopadhyay. "Formation of a tetranuclear supramolecule via non-covalent Pb⋯Cl tetrel bonding interaction in a hemidirected lead(ii) complex with a nickel(ii) containing metaloligand." CrystEngComm 21, no. 44 (2019): 6859–68. http://dx.doi.org/10.1039/c9ce01283d.

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A hetero-nuclear nickel(ii)/lead(ii) complex has been synthesized and characterized. The tetrel bonding interactions established between the σ-hole at the hemi-coordinated lead(ii) and the electron rich chlorido ligand has been analyzed by DFT study.

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18

Mikuriya, Masahiro, Keiichi Nakadera, and Takanori Kotera. "Novel Tetranuclear Nickel(II) Complex with a Mixed-Spin State Generated by Pairing of Dimers." Chemistry Letters 22, no. 4 (1993): 637–40. http://dx.doi.org/10.1246/cl.1993.637.

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19

Wei, Yu-Xin, Ying-Ru Zheng, Hao-Ying Niu, et al. "Synthesis, structure, properties and theoretical studies of novel tetranuclear nickel(II) bis(salamo)-like complex." Journal of Molecular Structure 1288 (September 2023): 135812. http://dx.doi.org/10.1016/j.molstruc.2023.135812.

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20

Nanda, Kausik K., Krishnan Venkatsubramanian, Devashis Majumdar, and Kamalaksha Nag. "Synthesis of a Novel Octaamino Tetraphenol Macrocyclic Ligand and Structure of a Tetranuclear Nickel(II) Complex." Inorganic Chemistry 33, no. 8 (1994): 1581–82. http://dx.doi.org/10.1021/ic00086a002.

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21

Wan, Xiao-Bing, Chuan-Ming Jin, Zheng-Wei Shi, and Guo-Yuan Lu. "Crystal structure of a tetranuclear nickel (II) complex of a 24-membered Schiff base macrocyclic ligand." Journal of Chemical Crystallography 34, no. 1 (2004): 57–60. http://dx.doi.org/10.1023/b:jocc.0000014689.24117.53.

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22

MIKURIYA, Masahiro, Masahiro TAKEUCHI, and Daisuke YOSHIOKA. "Tetranuclear Nickel(II) Complex with an Unsymmetrical Pentadentate Schiff-base Ligand Having a Defective Double-Cubane Core." X-ray Structure Analysis Online 33 (2017): 31–33. http://dx.doi.org/10.2116/xraystruct.33.31.

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23

Liu, Huiyan, Haiying Wang, Dezhong Niu, and Zaisheng Lu. "Synthesis, Structure, and Properties of a Tetranuclear Cubane-like Nickel(II) Complex with Tridentate Schiff Base Ligand." Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 35, no. 10 (2005): 779–83. http://dx.doi.org/10.1080/15533170500359927.

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24

Liu, Hui-Yan, Hai-Ying Wang, Da-Qing Shi, and Jin-Lei Tian. "Synthesis and Crystal Structure of a Tetranuclear Cubane-like Nickel(II) Complex with 2-Hydroxymethyl-N-salicylideneaniline." Chinese Journal of Chemistry 24, no. 4 (2006): 518–20. http://dx.doi.org/10.1002/cjoc.200690099.

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25

Li, Dong-Dong, Jin-Lei Tian, Ying-Ying Kou, Wen Gu, Xin Liu, and Shi-Ping Yan. "A Novel 1,2,4-Triazole-based Cyclic Tetranuclear Nickel(II) Complex: Synthesis, Characterization, Magnetic Property and Nuclease Activity." Zeitschrift für anorganische und allgemeine Chemie 635, no. 13-14 (2009): 2297–301. http://dx.doi.org/10.1002/zaac.200900014.

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26

Müller, Arnd, and Gerald Henkel. "[Ni3Se(o-C6H4{CH2Se}2)3]2- und [Ni4(SeiC3H7)8], die ersten höherkernigen NickeI(II)-Komplexe mit vollständiger Selen-Ligandensphäre [Ni3Se(o-C6H4{CH2Se}2)3]2- and [Ni4(SeiC3H7)8], the First Polynuclear Nickel(II) Complexes with Complete Selenium Ligand Spheres." Zeitschrift für Naturforschung B 52, no. 12 (1997): 1501–9. http://dx.doi.org/10.1515/znb-1997-1211.

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Reaction of nickel(II) chloride with disodium ο-xylenediselenolate in methanol yields the trinuclear mixed selenide-selenolate complex anion [Ni3Se(ο-C6H4{CH2Se}2)3]2- (3) which was isolated both as tetramethylammonium and mixed sodium/tetraethylammonium salt of formula [Me4N]2[Ni3Se(ο-C6H4{CH2Se}2)3] · MeOH (1) and [Et4N]3Na[Ni3Se-(ο-C6H4{CH2Se}2)3]2- · 3MeOH · 3H2O (2), respectively. Crystals of 1 are triclinic, space group P1̄, a = 9.065(2), b = 13.281(3); c = 18.019(4) Å , α = 92.81(2), β = 97.55(2), γ = 105.09(2)° and Z = 2. 2 crystallizes in the rhom bohedral space group R3c with a = 20.305(5), c = 41.709(9) Å and Z = 6. The structures were refined to R = 0.0705 (1) and 0.0794 (2), respectively. Both compounds contain the complex anion [Ni3Se- (ο-C6H4{CH2Se}2)3]2- (3), which possesses the same principal structural features as the corresponding thiolato derivatives. Reaction of nickel(II) chloride with sodium iso-propane selenolate in methanol leads to the cyclic tetranuclear complex [Ni4(SeiC3H7)8] (4), which crystallizes in the monoclinic space group P2/n with a = 13.161(3), b = 10.464(2), c = 14.603(2) Å , β = 94.42(1)° and Z = 2. The structure refinement converged to R = 0.0541. 4 is isostructural with the corresponding thiolato compound. The introduction of selenium instead of sulfur ligands reduces the midpoint potential of the reversible metal-centered oxidation from +595 to +285 mV.

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27

Moushi, Eleni, Constantinos G. Efthymiou, Spyros P. Perlepes, and Constantina Papatriantafyllopoulou. "Synthesis and Structural Characterization of a New Tetranuclear Nickel(II) Sulfato Complex Containing the Anionic Form of Di-2-Pyridyl Ketone Oxime." International Journal of Inorganic Chemistry 2011 (April 20, 2011): 1–9. http://dx.doi.org/10.1155/2011/606271.

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The preparation and crystal structure of a tetranuclear Ni(II) sulfato cluster containing the anion of di-2-pyridyl ketone oxime, (py)2CNO−, are reported. Treatment of NiSO4·6H2O with one equivalent of (py)2CNOH and one equivalent of NEt3 in MeOH leads to the compound [Ni4{(py)2CNO}4(SO4)2(MeOH)4] (1) in moderate yield. The metal ions are linked together by two 3.2111 and two 2.1110 (Harris notation) (py)2CNO− ligands, as well as two 2.1100 SO42− ions to create a rare metallacrown-type (12-MC-4) ring. Strong H-bond intermolecular interactions in 1 lead to the formation of a 1D chain along the axis. Characteristic IR bands are discussed in terms of the known structure of 1.

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28

Klingele, Marco H., Gunther Steinfeld, and Berthold Kersting. "Synthesis and Coordination Chemistry of Novel Binucleating Macrocyclic Ligands with Amine-thioether and Amine-thiophenolate Donor Functions." Zeitschrift für Naturforschung B 56, no. 9 (2001): 901–7. http://dx.doi.org/10.1515/znb-2001-0907.

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Abstract The ability of the aromatic tetraaldehyde l,2-bis(4-tert-butyl-2,6-diformylphenylsulfanyl)-ethane (1) to function as a precursor in the preparation of binucleating hexaamine-dithiolate ligands has been investigated. Reductive amination of compound 1 with bis(aminoethyl)amine under medium-dilution conditions affords the macrobicyclic hexaamine-dithioether compound L1. Deprotection of the [1+2] condensation product gives the corresponding 24-membered hexa-amine-dithiophenol ligand H2L2. The formulation of L1 as a macrobicyclic amine-thioether was confirmed by an X-ray crystal structure determination of the tetranuclear nickel(II) complex of L1, [{(L1)Ni2Cl2}2(μ-Cl)3](BPh4) (2b). The formulation of the doubly deprotonated form (L2)2- of H2L2 as a 24-membered amine-thiophenolate ligand was confirmed by an X-ray crystal structure determination of the dinuclear cobalt(III) complex, [(L2)CoIII(μ-OH)](ClO4)2 · Cl (3). The preparation and the crystal structures of the new compounds are described.

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29

Adams, Harry, Scott Clunas, and David E. Fenton. "A tetranuclear nickel(ii) complex assembled from an asymmetric compartmental ligand and bearing an intramolecular [H3O2]â€“ bridge." Chemical Communications, no. 5 (January 30, 2002): 418–19. http://dx.doi.org/10.1039/b109019b.

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30

Boyd, PDW, RL Martin та G. Schwarzenbach. "Spin Spin Interactions in Polynuclear Nickel(II) Complexes: A Low-Temperature Susceptibility and Magnetization Study of the Cubane Tetranuclear Complex Ni4II(chta)4(μ-OH)4(NO3)4.7H2O". Australian Journal of Chemistry 41, № 9 (1988): 1449. http://dx.doi.org/10.1071/ch9881449.

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The bulk magnetic susceptibility of the complex Ni4(chta)4(μ-OH)4(NO3)4.7H2O ( chta = cyclohexane-r-1,c-3,c-5-triamine) has been measured over the temperature range from 1.9 to 300 K at a field of 1 T. The observed data were fitted by a Heisenberg exchange model for the susceptibility of a cubane [Ni4II(μ-OH)4]4+ cluster with a single exchange interaction J between each pair of NiII ions for a single ion g value 2.20 and an antiferromagnetic spin-spin coupling parameter 2J = -1.14 cm-1. The bulk magnetization measured at fields of 1 to 5 T in the temperature range from 5 to 1.9 K differed from that calculated from the simple Heisenberg model above. Several possibilities were examined for this deviation including intercluster interactions, single ion zero-field splitting and differing exchange coupling constants between nickel(II) ions in the cluster. This last model was successful in describing the complete set of magnetic data. A comparison with other known oxygen-bridged nickel(II) cubane clusters shows a change from antiferromagnetic to ferromagnetic coupling as the Ni-O-Ni bond angle decreases. It appears that the cubane cluster studied here is in a region very close to the crossover from antiferromagnetic to ferromagnetic coupling between the nickel ions.

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31

Huang, Hu, Fumiaki Kai, Yoshifumi Asai, Masaaki Hirohata, Masaaki Nakamura, and Tadashi Tokii. "The Magnetic Properties of the Tetranuclear Nickel(II) Complex with [(3,5-Dichloro-2-Pyridyl)Azo]-8-Hydroxyquinoline-5-Sulfonate." Journal of Coordination Chemistry 25, no. 4 (1992): 357–61. http://dx.doi.org/10.1080/00958979209409210.

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32

Durán-Carril, María L., José Ignacio Fidalgo-Brandón, David Lombao-Rodríguez, Paula Munín-Cruz, Francisco Reigosa, and José M. Vila. "Breaking New Ground towards Innovative Synthesis of Palladacycles: The Electrochemical Synthesis of a Tetranuclear Thiosemicarbazone-[C,N,S] Palladium(II) Complex." Molecules 29, no. 17 (2024): 4185. http://dx.doi.org/10.3390/molecules29174185.

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The electrochemical oxidation of anodic metals (M = nickel and palladium) in an acetonitrile solution of the thiosemicarbazone ligands (E)-2-(1-(4-methoxyphenyl)ethylidene)-N-methylhydrazine-1-carbothioamide (a), (E)-2-(1-(p-tolyl)ethylidene)hydrazine-1-carbothioamide (b), and (E)-N-phenyl-2-(1-(p-tolyl)ethylidene)hydrazine-1-carbothioamide (c) yielded the homoleptic complexes [ML2], 1a, 1b, 1c, and 2c and [M4L4], 2a as air-stable solids. The crystal structures for 1a, 1b, 1c, and 2c show the ligands in a transoid disposition with the [S,S] and [N,N] donor atom pairs occupying cis positions on the nearly square planar coordination plane of the metal. The structure for 2a of S4 symmetry comprises a tetranuclear palladacycle where the metalated ligands are arranged around a central Pd4S4 environment: a crown ring with alternating palladium and sulfur atoms. The latter complex is the first example of an electrochemical preparation of a cyclometalated palladium compound, marking a milestone in the chemistry of such species. The compounds have been fully characterized by elemental microanalysis, mass spectrometry, infrared (IR), and 1H nuclear magnetic resonance (NMR) spectra.

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33

Song, Xue-yan, Yun-he Xu, Li-cun Li, Dai-zheng Liao, and Zong-hui Jiang. "An unexpected cubane-like nickel(II) tetranuclear complex bridged by the anion of 2-hydroxymethylbenzimidazole: Crystal structure and magnetic properties." Inorganica Chimica Acta 360, no. 6 (2007): 2039–44. http://dx.doi.org/10.1016/j.ica.2006.10.037.

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34

Ran, Jing-Wen, Su-Yun Zhang, Bin Xu, et al. "Tetranuclear nickel(II) complex with tripodal hydroxyl ligand functionalized by additional salicylaldehyde donor pendant: Synthesis, crystal structure and magnetic property." Inorganic Chemistry Communications 11, no. 1 (2008): 73–76. http://dx.doi.org/10.1016/j.inoche.2007.10.014.

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35

Terfassa, Belina, Christof Holzer, Jörg A. Schachner, et al. "A tetranuclear nickel(II) heterocubane complex of a bidentate N,O-hydroxymethyl-oxazoline ligand. Synthesis, characterization, magnetic measurements and DFT investigations." Journal of Coordination Chemistry 69, no. 3 (2016): 433–46. http://dx.doi.org/10.1080/00958972.2015.1130826.

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36

Kruger, Paul E., Gary D. Fallon, Boujemaa Moubaraki, and Keith S. Murray. "Synthesis and crystal and molecular structure of a tetranuclear ‘pair-of-dimers’ nickel(II) Schiff base complex. Magnetism of the Cu4analogue." J. Chem. Soc., Chem. Commun., no. 23 (1992): 1726–29. http://dx.doi.org/10.1039/c39920001726.

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37

Feng, Xun, Lu-Fang Ma, Li-Ya Wang, and Jian-She Zhao. "A unique tetranuclear nickel(II) complex containing pyridine-2-carboxaldehyde derivative bearing an intramolecular acetato: Synthesis, crystal structure and magnetic property." Inorganic Chemistry Communications 14, no. 4 (2011): 584–89. http://dx.doi.org/10.1016/j.inoche.2011.01.030.

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38

Zhang, Yang, Ya-Xue Su, Zhang Cai, Li Tong, and Wen-Kui Dong. "Structural, fluorescent and theoretical studies of a more flexible salamo-type ligand and its uncommon tetranuclear chloride-bridged nickel(II) complex." Journal of Molecular Structure 1309 (August 2024): 138164. http://dx.doi.org/10.1016/j.molstruc.2024.138164.

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39

Xie, K. F., L. L. Li, W. D. Li, X. Xu, and W. K. Dong. "A NOVEL TETRANUCLEAR NICKEL(II) SALAMO-BASED COMPLEX ADOPTING TWO OPEN CUBIC STRUCTURES: SYNTHESIS, CHRACTERIZATION, DFT CALCULATION, HIRSHFELD ANALYSIS, AND FLUORESCENT PROPERTIES." Journal of Structural Chemistry 62, no. 6 (2021): 876–88. http://dx.doi.org/10.1134/s002247662106007x.

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40

Shit, Shyamapada, Madhusudan Nandy, Georgina Rosair, Carlos J. Gómez-García, Juan J. Borras Almenar, and Samiran Mitra. "A ferromagnetically coupled single hydroxido bridged tetranuclear nickel(II) Schiff base complex incorporating a Ni4O4 cubane core: Crystal structure and magnetic study." Polyhedron 61 (September 2013): 73–79. http://dx.doi.org/10.1016/j.poly.2013.05.029.

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41

Kawamoto, Tatsuya, and Yoshihiko Kushi. "Three Types of Nickel(II) Complexes Derived from 2-Substituted Benzothiazoline; Formation of a Tetranuclear Complex by a Sterically Induced Orthometallation Reaction." Bulletin of the Chemical Society of Japan 77, no. 2 (2004): 289–94. http://dx.doi.org/10.1246/bcsj.77.289.

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42

Efthymiou, Constantinos G., Catherine P. Raptopoulou, Aris Terzis, et al. "A Systematic Exploration of Nickel(II)/Acetate/Di-2-pyridyl Ketone Chemistry: Neutral and Cationic Tetranuclear Clusters, and a Novel Mononuclear Complex." European Journal of Inorganic Chemistry 2006, no. 11 (2006): 2236–52. http://dx.doi.org/10.1002/ejic.200500898.

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43

Huang, Hu, Fumiaki Kai, Yoshifumi Asai, Masaaki Hirohata, and Masaaki Nakamura. "Synthesis and Crystal Structure of Novel Tetranuclear Nickel(II) Complex with Hpahqs (Hpahqs: 7-[(3,5-Dichloro-2-pyridyl)azo]-8-hydroxyquinoline-5-sulfonate)." Chemistry Letters 20, no. 1 (1991): 65–68. http://dx.doi.org/10.1246/cl.1991.65.

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44

Pilichos, Evangelos, Evangelos Spanakis, Evangelia-Konstantina Maniaki, et al. "Diversity of Coordination Modes in a Flexible Ditopic Ligand Containing 2-Pyridyl, Carbonyl and Hydrazone Functionalities: Mononuclear and Dinuclear Cobalt(III) Complexes, and Tetranuclear Copper(II) and Nickel(II) Clusters." Magnetochemistry 5, no. 3 (2019): 39. http://dx.doi.org/10.3390/magnetochemistry5030039.

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Syntheses, crystal structures and characterization are reported for four new complexes [Cu4Br2(L)4]Br2 (1), [Ni4(NO3)2(L)4(H2O)](NO3)2 (2), [Co2(L)3](ClO4)3 (3) and [Co(L)2](ClO4) (4), where L− is the monoanion of the ditopic ligand N′-(1-(pyridin-2-yl)ethylidene)pyridine-2-carbohydrazide (LH) built on a picolinoyl hydrazone core fragment, and possessing a bidentate and a tridentate coordination pocket. The tetranuclear cation of 1·0.8H2O·MeOH is a strictly planar, rectangular [2 × 2] grid. Two 2.21011 L− ligands bridge adjacent CuII atoms on the short sides of the rectangle through their alkoxide oxygen atoms, and two 2.11111 ligands bridge adjacent CuII atoms on the long sides of the rectangle through their diazine groups; two metal ions are 5-coordinate and two are 6-coordinate. The tetranuclear cation of 2·0.2H2O·3EtOH is a square [2 × 2] grid. The two 6-coordinate NiII atoms of each side of the square are bridged by the alkoxide O atom of one 2.21011 L− ligand. The dinuclear cation of 3·0.8H2O·1.3MeOH contains two low-spin octahedral CoIII ions bridged by three 2.01111 L− ligands forming a pseudo triple helicate. In the mononuclear cation [Co(L)2]+ of complex 4, the low-spin octahedral CoIII center is coordinated by two tridentate chelating, meridional 1.10011 ligands. The crystal structures of the complexes are stabilized by a variety of π–π stacking and/or H-bonding interactions. Compounds 2, 3 and 4 are the first structurally characterized nickel and cobalt complexes of any form (neutral or anionic) of LH. The 2.01111 and 1.10011 coordination modes of L−, observed in the structures of complexes 3 and 4, have been crystallographically established for the first time in coordination complexes containing this anionic ligand. Variable-temperature, solid-state dc magnetic susceptibility and variable-field magnetization studies at 1.8 K were carried out on complexes 1 and 2. Antiferromagnetic metal ion···metal ion exchange interactions are present in both complexes. The study reveals that the cation of 1 can be considered as a practically isolated pair of strongly antiferromagnetically coupled (through the diazine group of L−) dinulear units. The susceptibility data for 2 were fit to a single-J model for an S = 1 cyclic tetramer. The values of the J parameters have been rationalized in terms of known magnetostructural correlations. Spectral data (infrared (IR), ultraviolet/visible (UV/VIS), 1H nuclear magnetic resonance (NMR) for the diamagnetic complexes) are also discussed in the light of the structural features of 1–4 and the coordination modes of the organic and inorganic ligands that are present in the complexes. The combined work demonstrates the ligating flexibility of L−, and its usefulness in the synthesis of complexes with interesting structures and properties.

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45

Huang, Hu, Fumiaki Kai, Yoshifumi Asai, Masaaki Hirohata, and Masaaki Nakamura. "Synthesis, Crystal Structure, and Property of Novel Tetranuclear Nickel(II) Complex with Multidentate Ligand 7-[(3,5-Dichloro-2-pyridyl)azo]-8-hydroxyquinoline-5-sulfonic Acid." Bulletin of the Chemical Society of Japan 64, no. 8 (1991): 2464–69. http://dx.doi.org/10.1246/bcsj.64.2464.

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46

Mimura, Masaaki, Toshihiro Matsuo, Naohide Matsumoto, Satoshi Takamizawa, Wasuke Mori та Nazzareno Re. "Bis[(methanol){N-salicylidene-N′-(2-phenylimidazol-4-ylmethylidene)-1,3-propanediaminato}nickel(II)] Bridged by Di-μ-phenoxo Moiety and the Deprotonated Imidazolate-Bridged Cyclic-Tetranuclear Complex". Bulletin of the Chemical Society of Japan 71, № 8 (1998): 1831–37. http://dx.doi.org/10.1246/bcsj.71.1831.

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47

Mochizuki, Katsura, Kazuhiko Kumagai, Masayuki Takishima та Kiyoharu Hayano. "Tetranuclear nickel(II) complex derived from bis(macrocycle), μ-terephthalato-bis{aqua-7,7′-o-xylylenebis{3,7,11,17-tetraazabicyclo[11.3.1]-heptadeca-1(17), 13,15-trienedinickel(II)}} iodide, {[Ni2(OH2)(L)]2(μ-terephthalato)}I6". Inorganic Chemistry Communications 6, № 7 (2003): 935–38. http://dx.doi.org/10.1016/s1387-7003(03)00154-0.

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48

Rahman, Md Saifur, Jagodish C. Sarker, Shariff E. Kabir, and Tasneem A. Siddiquee. "Reactivity of [M4(co)12(µ-pyms)4] (M = Mn, re; pymS = pyrimidine-2-Thiolate) with bis(triphenylphosphino)nickel(ii) dicarbonyl: X-ray crystal structure of [Re(Co)3(?2-pymS)(PPh3)]." Journal of Bangladesh Academy of Sciences 38, no. 2 (2014): 155–65. http://dx.doi.org/10.3329/jbas.v38i2.21340.

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The reaction between the tetranuclear compound [Mn4(CO)12(µ -pymS)4] (1) and (PPh3)2Ni(CO)2 at room temperature resulted in the cleavage of the square to afford the dinuclear complex [Mn2(CO)5(µ -pymS)2(PPh3)] (2) (19%) along with two mononuclear complexes fac- [Mn(CO)3(?2-pymS)(PPh3)] (3) (43%) and [Mn(CO)2(?2-pymS)(PPh3)2] (4) (24%). In contrast, a similar reaction of [Re4(CO)12(µ-pymS)4] (5) with (PPh3)2Ni(CO)2 at 25oC did not afford any dinuclear compound leading instead to the monophosphine substituted mononuclear compound fac- [Re(CO)3(?2-pymS)(PPh3)] (6) (72%). Compound 4 is also formed when a toluene solution of 3 is treated with PPh3 at elevated temperature (100oC). A similar treatment of 6 with triphenylphosphine in refluxing toluene gave [Re(CO)2(?2-pymS)(PPh3)2] (7) (60%). All the new compounds have been characterized by elemental analysis, IR, 1H NMR and 31P{1H} NMR spectroscopy and mass spectrometry along with single crystal X-ray diffraction analysis for 6. Compound 6 consists of a single rhenium atom with three carbonyls, a triphenylphosphine ligand and a chelating pyrimidinethiolate ligand. DOI: http://dx.doi.org/10.3329/jbas.v38i2.21340 Journal of Bangladesh Academy of Sciences, Vol. 38, No. 2, 155-165, 2014

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49

Igarashi, Satoshi, Shin-ichi Kawaguchi, Yasuhiko Yukawa, Floriana Tuna, and Richard E. P. Winpenny. "A cyclic tetranuclear Ni2Gd2 complex bridged by amino acidato ligands, with an S = 9 ground state, derived from ferromagnetic spin-coupling between nickel(ii) and gadolinium(iii) ions." Dalton Transactions, no. 17 (2009): 3140. http://dx.doi.org/10.1039/b823366g.

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50

Sung, Nack-Do, Ki-Seob Yun, Tae-Young Kim та ін. "Synthesis and characterization of a novel tetranuclear nickel(II) complex: [Ni4(μ-OH)2(μ-dppn)4(μ-H2O)2](Cl)(ClO4)5·9H2O (dppn=3,6-bis(2-pyridyl)pyridazine)". Inorganic Chemistry Communications 4, № 8 (2001): 377–80. http://dx.doi.org/10.1016/s1387-7003(01)00195-2.

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