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Journal articles on the topic 'Novel Polynuclear Complexes'

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Published: 4 June 2021
Last updated: 6 September 2023

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1

Shopov, Dimitar Y., Liam S. Sharninghausen, Shashi Bhushan Sinha, Julia E. Borowski, Brandon Q. Mercado, Gary W. Brudvig, and Robert H. Crabtree. "Synthesis of pyridine-alkoxide ligands for formation of polynuclear complexes." New Journal of Chemistry 41, no. 14 (2017): 6709–19. http://dx.doi.org/10.1039/c7nj01845b.

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2

Bochkarev, Leonid N., Oleg V. Grachev, Natalya E. Molosnova, Sergey F. Zhiltsov, Lev N. Zakharov, Georgy K. Fukin, Alexander I. Yanovsky, and Yury T. Struchkov. "Novel polynuclear organotin complexes of samarium and ytterbium." Journal of Organometallic Chemistry 443, no. 2 (January 1993): C26—C28. http://dx.doi.org/10.1016/0022-328x(93)80309-y.

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3

Niu, Meiju, Zhen Li, Huanhuan Li, Xiao Li, Jianmin Dou, and Suna Wang. "DNA/protein interaction, cytotoxic activity and magnetic properties of amino-alcohol Schiff base derived Cu(ii)/Ni(ii) metal complexes: influence of the nuclearity and metal ions." RSC Advances 5, no. 47 (2015): 37085–95. http://dx.doi.org/10.1039/c5ra00623f.

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4

Fleischmann, Martin, Luis Dütsch, Mehdi Elsayed Moussa, Andrea Schindler, Gábor Balázs, Christophe Lescop, and Manfred Scheer. "Organometallic polyphosphorus and -arsenic ligands as linkers between pre-assembled linear CuI fragments." Chemical Communications 51, no. 14 (2015): 2893–95. http://dx.doi.org/10.1039/c4cc09845e.

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We present a simple route to multimetallic CuI building blocks and their interaction with organometallic polyphosphorus and -arsenic linkers affording in novel polynuclear complexes or one-dimensional coordination polymers.
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5

Wilhelmi, Caroline, Maximilian Gaffga, Yu Sun, Gereon Niedner-Schatteburg, and Werner R. Thiel. "A Novel Bifunctional Ligand for the Synthesis of Polynuclear Alkynyl Complexes." Zeitschrift für Naturforschung B 69, no. 11-12 (December 1, 2014): 1290–98. http://dx.doi.org/10.5560/znb.2014-4164.

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Abstract The synthesis of 2-(1-(prop-2-yn-1-yl)-1H-pyrazol-3-yl)pyridine is presented. This ligand contains both, an alkynyl function being suitable for metal-carbon bond formation with electron-rich late transition metal sites, and a pyrazolylpyridine unit, which is well-known to undergo chelation reactions similar to 2,2′-bipyridine. This strategy allows building up polynuclear complexes with broad combinations of different metal sites. Two platinum alkynyl complexes were structurally characterized, and a trinuclear Ru2Pt complex was indentified by means of NMR spectroscopy and ESI mass spectrometry.
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6

Thompson, Laurence K. "2004 Alcan Award LectureFrom dinuclear to triakontahexanuclear complexes — Adventures in supramolecular coordination chemistry." Canadian Journal of Chemistry 83, no. 2 (February 1, 2005): 77–92. http://dx.doi.org/10.1139/v04-173.

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Polynuclear coordination complexes result from the interplay between the arrangement of the binding sites of a ligand, and their donor content, and the coordination preferences of the metal ion involved. Rational control of the ligand properties, such as denticity, geometry, and size, can lead to large, and sometimes predictable, polynuclear assemblies. This Alcan Award Lecture highlights our "adventures" with polynucleating ligands over the last 25 years, with examples ranging from simple dinucleating to more exotic high-denticity ligands. Complexes with nuclearities ranging from 2 to 36 have been produced, many of which have novel magnetic, electrochemical, and spectroscopic properties. Self-assembly strategies using relatively simple "polytopic" ligands have been very successful in producing high-nuclearity clusters in high yield. For example, linear "tritopic" ligands produce M9 (M = Mn(II), Fe(II), Fe(III), Co(II), Ni(II), Cu(II), Zn(II)) [3 × 3], flat grid-like molecules, which have quantum dot-like arrays of nine closely spaced metal centers in electronic communication. Some of these grids are discussed in terms of their novel magnetic and electrochemical properties, and also as multistable nanometer-scale platforms for potential molecular device behaviour. Bigger ligands with extended arrays of coordination pockets, and the capacity to self-assemble into much larger grids, are highlighted to illustrate our current and longer term goals of generating polymetallic molecular two-dimensional layers on surfaces.Key words: Alcan Award Lecture, transition metal, polynuclear, structure, magnetism, electrochemistry, surface studies, molecular device.
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7

Mei, Guangjian, Zifeng Li, Haifang Zhang, Gang Li, and Xiangru Meng. "Synthesis, Structures, and Properties of Two Novel Zn(II) Polynuclear Complexes." Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 40, no. 3 (March 23, 2010): 163–69. http://dx.doi.org/10.1080/15533171003629105.

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8

Kretschmer, Winfried P., Jan H. Teuben, and Sergei I. Troyanov. "Novel, Highly Symmetrical Halogen-Centered Polynuclear Lanthanide Complexes: [Cp6Yb6Cl13]− and [Cp12Sm12Cl24]." Angewandte Chemie International Edition 37, no. 1-2 (February 2, 1998): 88–90. http://dx.doi.org/10.1002/(sici)1521-3773(19980202)37:1/2<88::aid-anie88>3.0.co;2-7.

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9

Rodrigues, Manuela J. E., Filipe A. Almeida Paz, Rute A. Sá Ferreira, Luís D. Carlos, and Helena I. S. Nogueira. "Polynuclear Molybdenum and Tungsten Complexes containing 3-Hydroxypicolinic Acid and Europium (III)." Materials Science Forum 514-516 (May 2006): 1305–12. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.1305.

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Novel polynuclear tungsten and molybdenum (VI) complexes with 3-hydroxypicolinic acid (HpicOH) and europium(III) [M4O12Eu(picOH)3] (M(VI) = W, Mo) were prepared by hydrothermal methods. The solid compounds were characterized by FT-IR and FT-Raman spectroscopy and elemental analysis. The photoluminescent properties of the materials were investigated, showing sensitization of the europium(III) luminescence by both the 3- hydroxypicolinate ligand and the polyoxometalate moiety
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10

Siedzielnik, Magdalena, Dimitrios A. Pantazis, Jakub Bruniecki, Kinga Kaniewska-Laskowska, and Anna Dołęga. "The Reactivity of the Imine Bond within Polynuclear Nickel(II) Complexes." Crystals 11, no. 5 (May 5, 2021): 512. http://dx.doi.org/10.3390/cryst11050512.

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Three novel Ni complexes with the Schiff base ligand 2-methoxy-6-(E-2-pyridyliminomethyl)-phenol (L1) are described. In comparison with the similar 2-(pyridine-2-ylimino-methyl)phenol (pymp), the mode of coordination of L1 is altered due to the presence of methoxy substituent introducing the sterical hindrance. During the synthesis of the complexes, partial hydrolysis of the ligand was observed. Since such immediate hydrolysis of L1 was not detected during the reactions of Zn(II) and Cu(II) salts with L1, the DFT calculated structures of a series of similar Zn, Cu, Ni, and Co complexes with L1 are compared to account for the phenomenon.
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11

Ang, Joo Chuan, Yanyan Mulyana, Chris Ritchie, Rodolphe Clérac, and Colette Boskovic. "Mixed-Valent Polynuclear Cobalt Complexes Incorporating Tetradentate Phenoxyamine Ligands." Australian Journal of Chemistry 62, no. 9 (2009): 1124. http://dx.doi.org/10.1071/ch09256.

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The new potentially tetradentate ligand precursor 2-[(bis(2-hydroxyethyl)amino)methyl]-4,6-bis-tert-butylphenol (H3L) has been synthesized and characterized. The reaction of H3L with cobalt(ii) acetate has afforded the novel mixed-valent tetra- and pentanuclear cobalt complexes [CoII2CoIII2(OAc)2(L)2(HL)] (1) and [CoIICoIII4(OAc)2(L)4] (2). Single-crystal X-ray diffraction studies of these complexes indicate different coordination geometries for the divalent cobalt centres in each complex, with distorted trigonal bipyramidal and distorted tetrahedral coordination evident in 1 and 2, respectively. The variable temperature magnetic susceptibility data for complex 1 reveal behaviour dominated by antiferromagnetic coupling between the two cobalt(ii) centres. Their approximate trigonal bipyramidal coordination geometries give rise to a 4A′2 ground term, allowing a spin-only treatment assuming local spin quantum numbers of Si = 3/2. Fitting the data to the Heisenberg exchange Hamiltonian (Ĥex = –2JS·1S2) results in J = –6.9(1) cm–1 and g = 2.30(5).
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12

BANERJEE, A. K., D. PRASAD, S. S. PRAKASH, B. MAHAPATRA, N. DHAR, M. K. GHOSH, and S. K. ROY. "ChemInform Abstract: Novel Polynuclear Alkali and Alkaline Earth Metal Complexes with Metal Complexes as Ligands." ChemInform 22, no. 32 (August 22, 2010): no. http://dx.doi.org/10.1002/chin.199132280.

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13

Musina, E. I., A. V. Shamsieva, I. D. Strelnik, T. P. Gerasimova, D. B. Krivolapov, I. E. Kolesnikov, E. V. Grachova, et al. "Synthesis of novel pyridyl containing phospholanes and their polynuclear luminescent copper(i) complexes." Dalton Transactions 45, no. 5 (2016): 2250–60. http://dx.doi.org/10.1039/c5dt03346b.

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14

Marques, M. P. M. "Platinum and Palladium Polyamine Complexes as Anticancer Agents: The Structural Factor." ISRN Spectroscopy 2013 (February 24, 2013): 1–29. http://dx.doi.org/10.1155/2013/287353.

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Since the introduction of cisplatin to oncology in 1978, Pt(II) and Pd(II) compounds have been intensively studied with a view to develop the improved anticancer agents. Polynuclear polyamine complexes, in particular, have attracted special attention, since they were found to yield DNA adducts not available to conventional drugs (through long-distance intra- and interstrand cross-links) and to often circumvent acquired cisplatin resistance. Moreover, the cytotoxic potency of these polyamine-bridged chelates is strictly regulated by their structural characteristics, which renders this series of compounds worth investigating and their synthesis being carefully tailored in order to develop third-generation drugs coupling an increased spectrum of activity to a lower toxicity. The present paper addresses the latest developments in the design of novel antitumor agents based on platinum and palladium, particularly polynuclear chelates with variable length aliphatic polyamines as bridging ligands, highlighting the close relationship between their structural preferences and cytotoxic ability. In particular, studies by vibrational spectroscopy techniques are emphasised, allowing to elucidate the structure-activity relationships (SARs) ruling anticancer activity.
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15

Sison, Girlie Naomi N., Arnie R. De Leon, and Janir T. Datukan. "Synthesis and Spectroscopic Analysis of Novel Polynuclear Rhenium(I) Complexes of the Form [Re(CO)3Cl]n[tppq] (n = 1, 2, 3, or 4; tppq = 2,3,1,8-tetra-2-Pyridylpyrazino[2,3-g]quinoxalineJ." KIMIKA 23 (March 1, 2010): 55–63. http://dx.doi.org/10.26534/kimika.v23i1.55-63.

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A number of transition metal complexes have been investigated as potential electrocatalystsfor C02 reduction. Among these are rhenium monometallic complexes, which have shownunique activity towards C02 reduction. Further development of multimetallic systems,capable of storing multiple equivalents of electrons has shown some potential in increasingthe selectivity of the C02 conversion processes toward highly reduced products. This studyreports the synthesis and characterization of novel polynuclear rhenium(I) complexes whererhenium is incorporated to the bridging ligand tppq (2,3,7,8-tetra-2-pyridylpyrazino[2,3-g]quinoxaline), which is capable of attaching up to four metal centers. The resultingcomplexes were characterized using different spectroscopic techniques (infrared, UV-Vis,emission) and cyclic voltammetry. The results suggest that the synthetic procedure adoptedwas successful.
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16

Reis Conceição, Nuno, Oksana V. Nesterova, Cyril Rajnák, Roman Boča, Armando J. L. Pombeiro, M. Fátima C. Guedes da Silva, and Dmytro S. Nesterov. "New members of the polynuclear manganese family: MnII2MnIII2 single-molecule magnets and MnII3MnIII8 antiferromagnetic complexes. Synthesis and magnetostructural correlations." Dalton Transactions 49, no. 40 (2020): 13970–85. http://dx.doi.org/10.1039/d0dt02652b.

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17

Katkova, Marina A., Grigory Y. Zhigulin, Roman V. Rumyantcev, Galina S. Zabrodina, Vladimir R. Shayapov, Maxim N. Sokolov, and Sergey Y. Ketkov. "Water-Soluble Bismuth(III) Polynuclear Tyrosinehydroximate Metallamacrocyclic Complex: Structural Parallels to Lanthanide Metallacrowns." Molecules 25, no. 19 (September 23, 2020): 4379. http://dx.doi.org/10.3390/molecules25194379.

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Recently there has been a great deal of interest and associated research into aspects of the coordination chemistry of lanthanides and bismuth—elements that show intriguing common features. This work focuses on the synthesis and characterization of a novel bismuth(III) polynuclear metallamacrocyclic complex derived from aminohydroxamic acid, in order to compare the coordination ability of Bi3+ with the similarly sized La3+ ions. A polynuclear tyrosinehydroximate Bi(OH)[15-MCCu(II)Tyrha-5](NO3)2 (1) was obtained according to the synthetic routes previously described for water-soluble Ln(III)-Cu(II) 15-MC-5 metallacrowns. Correlations between structural parameters of Bi(III) and Ln(III) complexes were analyzed. DFT calculations confirmed the similarity between molecular structures of the model bismuth(III) and lanthanum(III) tyrosinehydroximate 15-metallacrowns-5. Analysis of the electronic structures revealed, however, stronger donor-acceptor interactions between the central ion and the metallamacrocycle in the case of the lanthanum analogue. Thermochromic properties of 1 were studied.
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18

Wang, Yingying, Meixia Wen, Zhongjun Gao, and Ning Sheng. "Crystal structure and magnetic properties of a linear tetranuclear CoIIcluster." Acta Crystallographica Section C Structural Chemistry 72, no. 9 (August 25, 2016): 697–700. http://dx.doi.org/10.1107/s205322961601281x.

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Polynuclear complexes are an important class of inorganic functional materials and are of interest particularly for their applications in molecular magnets. Multidentate chelating ligands play an important role in the design and syntheses of polynuclear metal clusters. A novel linear tetranuclear CoIIcluster, namely bis{μ3-(E)-2-[(2-oxidobenzylidene)amino]phenolato}bis{μ2-(E)-2-[(2-oxidobenzylidene)amino]phenolato}bis(1,10-phenanthroline)tetracobalt(II), [Co4(C14H11NO2)4(C12H8N2)2], was prepared under solvothermal conditions through a mixed-ligand synthetic strategy. The structure was determined by X-ray single-crystal diffraction and bulk purity was confirmed by powder X-ray diffraction. The complex molecule has a centrosymmetric tetranuclear chain-like structure and the four CoIIions are located in two different coordination environments. The CoIIions at the ends of the chain are in a slightly distorted octahedral geometry, while the two inner CoIIions are in five-coordinate distorted trigonal bipyramidal environments. A magnetic study reveals ferromagnetic CoII...CoIIexchange interactions for the complex.
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19

Orlova, T. Yu, and Yu S. Nekrasov. "Binuclear ladder-type complexes as building blocks for the synthesis of novel polynuclear systems." Russian Chemical Bulletin 59, no. 5 (May 2010): 873–80. http://dx.doi.org/10.1007/s11172-010-0179-z.

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20

Abhervé, Alexandre, Juan Modesto Clemente-Juan, Miguel Clemente-León, Eugenio Coronado, Jaursup Boonmak, and Sujittra Youngme. "Tuning the nuclearity of iron(iii) polynuclear clusters by using tetradentate Schiff-base ligands." New J. Chem. 38, no. 5 (2014): 2105–13. http://dx.doi.org/10.1039/c3nj01516e.

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Three novel octanuclear, hexanuclear and tetranuclear complexes of high-spin Fe(iii) ions were obtained by the reaction of the N,N′-bis-(1R-imidazol-4-ylmethylene)-ethane-1,2-diamine ligand (R = H, CH3) and its derivatives with Fe(ClO4)3·6H2O and KSCN.
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21

Yeşilel, Okan Zafer, Hakan Erer, and Orhan Büyükgüngör. "An unprecedented coordination mode of the orotate ligand in novel polynuclear cadmium(II)–orotate complexes." Polyhedron 29, no. 7 (May 2010): 1815–21. http://dx.doi.org/10.1016/j.poly.2010.02.037.

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22

Oyarzabal, Itziar, José Ruiz, Antonio J. Mota, Antonio Rodríguez-Diéguez, José M. Seco, and Enrique Colacio. "An experimental and theoretical magneto-structural study of polynuclear NiII complexes assembled from a versatile bis(salicylaldehyde)diamine polytopic ligand." Dalton Transactions 44, no. 15 (2015): 6825–38. http://dx.doi.org/10.1039/c5dt00356c.

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23

Makhankova, Valeriya G., Olga Yu Vassilyeva, Volodymyr N. Kokozay, Brian W. Skelton, Lorenzo Sorace, and Dante Gatteschi. "Novel polynuclear CuII/CoII complexes constructed from one and two Cu2Co triangles with antiferromagnetic exchange coupling." Journal of the Chemical Society, Dalton Transactions, no. 22 (October 21, 2002): 4253–59. http://dx.doi.org/10.1039/b205389f.

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24

Iyoda, Masahiko, Tamiko Yada, Shin-ichiro Tashiro, Hironori Maeda, Masato Yoshida, and Yoshiyuki Kuwatani. "Synthesis of Novel Polynuclear Iron Carbonyl Complexes Using the Reactions of Methylidenecarbenes with Fe3(CO)12." Chemistry Letters 26, no. 1 (January 1997): 39–40. http://dx.doi.org/10.1246/cl.1997.39.

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25

Orlova, T. Yu, and Yu S. Nekrasov. "ChemInform Abstract: Binuclear Ladder-Type Complexes as Building Blocks for the Synthesis of Novel Polynuclear Systems." ChemInform 42, no. 14 (March 14, 2011): no. http://dx.doi.org/10.1002/chin.201114225.

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26

Yıldız, S. Zeki, M. Nedim Mısır, Nuray Tüfekci, Yaşar Gök, Nirmalendu Ray Chaudhuri, Ruo-Hua Zhang, Kurt V. Mikkelsen, and Alexander Senning. "The Synthesis and Characterization of a Novel (E,E)-Dioxime (Sic) and Its Mono- and Polynuclear Complexes." Acta Chemica Scandinavica 52 (1998): 694–701. http://dx.doi.org/10.3891/acta.chem.scand.52-0694.

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27

Ziessel, Raymond, and Jean Suffert. "Unexpected copper(I) complexation behaviour observed in the synthesis of novel polynuclear chromium(0)–copper(I) complexes." J. Chem. Soc., Chem. Commun., no. 16 (1990): 1105–7. http://dx.doi.org/10.1039/c39900001105.

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28

Puentes, Roberto, Julia Torres, Carlos Kremer, Joan Cano, Francesc Lloret, Davide Capucci, and Alessia Bacchi. "Mononuclear and polynuclear complexes ligated by an iminodiacetic acid derivative: synthesis, structure, solution studies and magnetic properties." Dalton Transactions 45, no. 12 (2016): 5356–73. http://dx.doi.org/10.1039/c5dt05060j.

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Two novel families of coordination polymers, [Ln(bzlida)(Hbzlida)]·H2O (Ln = La, Nd) and [Ln2(bzlida)3]·3H2O (Ln = Nd, Sm, Eu, Gd) were prepared by hydrothermal reaction of Ln2O3 with benzyliminodiacetic acid.
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29

Borisova, N. E., Yu A. Ustynyuk, M. D. Reshetova, G. G. Aleksandrov, I. L. Eremenko, and I. I. Moiseev. "Binuclear and polynuclear transition metal complexes with macrocyclic ligands. 5. Novel complexes of asymmetric polydentate macrocyclic Schiff bases. Step-by-step synthesis." Russian Chemical Bulletin 53, no. 2 (February 2004): 340–45. http://dx.doi.org/10.1023/b:rucb.0000030808.51647.f1.

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30

Semeniuc, Radu F., Daniel L. Reger, and Mark D. Smith. "Silver(I) and rhenium(I) metal complexes of a 2,2′-bipyridine-functionalized third-generation tris(pyrazolyl)methane ligand." Acta Crystallographica Section C Structural Chemistry 72, no. 11 (October 5, 2016): 826–31. http://dx.doi.org/10.1107/s2053229616012171.

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Heterotopic ligands offer the possibility of preparing polynuclear bimetallic complexes. Recent studies of heteroditopic ligands and their metal complexes have focused on novel supramolecular systems, biological activity, and the development of MRI contrast agents. The heteroditopic ligand Bipy–CH2–O–CH2–C(pz)3(Bipy-L; Bipy is 2,2′-bipyridine and pz is pyrazolyl) reacts with AgBF4to produce the coordination polymercatena-poly[[silver(I)-(μ-5-{[tris(pyrazol-1-yl)methoxy]methyl-κ2N,N′}-2,2′-bipyridine-κ2N,N′)] diethyl ether hemisolvate], {[Ag(C22H20N8O)]BF4·0.5C4H10O}n, and with Re(CO)5Br to form the discrete compound bromidotricarbonyl(5-{[tris(pyrazol-1-yl)methoxy]methyl}-2,2′-bipyridine-κ2N,N′)rhenium(I), [ReBr(C22H20N8O)(CO)3]. The silver(I) compound is a one-dimensional coordination polymer, built up by a κ2coordination mode of the bipyridine group and a κ2–κ0coordination mode of the –C(pz)3donor set. In [ReBr(Bipy-L)(CO)3], the ligand coordinates onlyviathe bipyridine end, leaving the –C(pz)3donor set free for further coordination interactions.
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Roberts, Sue A., Charles G. Young, W. E. Cleland, Katsumoto Yamanouchi, Richard B. Ortega, and John H. Enemark. "Structures of three novel polynuclear oxo- and sulfidomolybdenum complexes containing the hydrotris(3,5-dimethyl-1-pyrazolyl)borate ligand." Inorganic Chemistry 27, no. 15 (July 1988): 2647–52. http://dx.doi.org/10.1021/ic00288a018.

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32

Bıyıklıoğlu, Zekeriya, Beytullah Ertem, Selami Karslıoğlu, and Yaşar Gök. "Synthesis and characterization of novel (E,E)-dioxime and its mono- and polynuclear metal complexes containing azacrown moieties." Transition Metal Chemistry 32, no. 5 (June 7, 2007): 591–96. http://dx.doi.org/10.1007/s11243-007-0215-5.

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33

HIDAI, M., and Y. MIZOBE. "ChemInform Abstract: Toward Novel Organic Synthesis on Multimetallic Centers: Synthesis and Reactivities of Polynuclear Transition-Metal-Sulfur Complexes." ChemInform 28, no. 21 (August 4, 2010): no. http://dx.doi.org/10.1002/chin.199721267.

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34

IYODA, M., T. YADA, S. TASHIRO, H. MAEDA, M. YOSHIDA, and Y. KUWATANI. "ChemInform Abstract: Synthesis of Novel Polynuclear Iron Carbonyl Complexes Using the Reactions of Methylidenecarbenes with Fe3(CO)12." ChemInform 28, no. 26 (August 4, 2010): no. http://dx.doi.org/10.1002/chin.199726221.

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35

You, Zhong-Lu, Xiao Han, and Guang-Ning Zhang. "Synthesis, Crystal Structures, and Urease Inhibitory Activities of Three Novel Thiocyanato-bridged Polynuclear Schiff Base Cadmium(II) Complexes." Zeitschrift für anorganische und allgemeine Chemie 634, no. 1 (January 2008): 142–46. http://dx.doi.org/10.1002/zaac.200700345.

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36

Zwettler, Niklas, Madeleine A. Ehweiner, Jörg A. Schachner, Antoine Dupé, Ferdinand Belaj, and Nadia C. Mösch-Zanetti. "Dioxygen Activation with Molybdenum Complexes Bearing Amide-Functionalized Iminophenolate Ligands." Molecules 24, no. 9 (May 10, 2019): 1814. http://dx.doi.org/10.3390/molecules24091814.

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Two novel iminophenolate ligands with amidopropyl side chains (HL2 and HL3) on the imine functionality have been synthesized in order to prepare dioxidomolybdenum(VI) complexes of the general structure [MoO2L2] featuring pendant internal hydrogen bond donors. For reasons of comparison, a previously published complex featuring n-butyl side chains (L1) was included in the investigation. Three complexes (1–3) obtained using these ligands (HL1–HL3) were able to activate dioxygen in an in situ approach: The intermediate molybdenum(IV) species [MoO(PMe3)L2] is first generated by treatment with an excess of PMe3. Subsequent reaction with dioxygen leads to oxido peroxido complexes of the structure [MoO(O2)L2]. For the complex employing the ligand with the n-butyl side chain, the isolation of the oxidomolybdenum(IV) phosphino complex [MoO(PMe3)(L1)2] (4) was successful, whereas the respective Mo(IV) species employing the ligands with the amidopropyl side chains were found to be not stable enough to be isolated. The three oxido peroxido complexes of the structure [MoO(O2)L2] (9–11) were systematically compared to assess the influence of internal hydrogen bonds on the geometry as well as the catalytic activity in aerobic oxidation. All complexes were characterized by spectroscopic means. Furthermore, molecular structures were determined by single-crystal X-ray diffraction analyses of HL3, 1–3, 9–11 together with three polynuclear products {[MoO(L2)2]2(µ-O)} (7), {[MoO(L2)]4(µ-O)6} (8) and [C9H13N2O]4[Mo8O26]·6OPMe3 (12) which were obtained during the synthesis of reduced complexes of the type [MoO(PMe3)L2] (4–6).
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37

Munakata, Megumu, Susumu Kitagawa, Naohiko Ujimaru, Masaki Nakamura, Masahiko Maekawa, and Hajime Matsuda. "Synthesis, structures, and properties of the molecular assemblies of copper(I) and silver(I) complexes with phenazine. Novel donor-acceptor and huge polynuclear complexes." Inorganic Chemistry 32, no. 6 (March 1993): 826–32. http://dx.doi.org/10.1021/ic00058a013.

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38

Silva, Tânia Magalhães, Sara Andersson, Sunil Kumar Sukumaran, Maria Paula Marques, Lo Persson, and Stina Oredsson. "Norspermidine and Novel Pd(II) and Pt(II) Polynuclear Complexes of Norspermidine as Potential Antineoplastic Agents Against Breast Cancer." PLoS ONE 8, no. 2 (February 13, 2013): e55651. http://dx.doi.org/10.1371/journal.pone.0055651.

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39

Tu, Chao, Jun Lin, Ying Shao, and Zijian Guo. "Toward the Design of Novel Polynuclear Platinum Antitumor Complexes: A Polydentate Ligand System Based on Dipyridylamine and 1,3,5-Trimethylenebenzene." Inorganic Chemistry 42, no. 19 (September 2003): 5795–97. http://dx.doi.org/10.1021/ic034604q.

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40

Gok, Yasar. "The synthesis and characterization of novel tetraoxime and its mono- and polynuclear complexes containing 12-membered diaza-dithia macrocycles." Polyhedron 15, no. 8 (April 1996): 1355–61. http://dx.doi.org/10.1016/0277-5387(95)00370-3.

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41

Wei, Tian-Xin, Meng-Jun Liu, Chun-Hui Huang, Xiao-Feng Yu, Hui-Zhong Huang, Nian-Zu Wu, Pu-Hui Xie, and Bao-Wen Zhang. "Novel Roles of Metal Ions in Layered Self-assembled Films of Polynuclear Complexes on Their Photoinduced Electron Transfer Properties." Chinese Journal of Chemistry 24, no. 10 (October 2006): 1452–57. http://dx.doi.org/10.1002/cjoc.200690273.

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42

Xie, Yongshu, Qingliang Liu, Hui Jiang, and Jia Ni. "Novel Complexes of Ligands Containing Phenol and Alcohol Groups: From Polynuclear Cluster, 1D Coordination Polymer to 2D Supramolecular Assemblies." European Journal of Inorganic Chemistry 2003, no. 22 (November 2003): 4010–16. http://dx.doi.org/10.1002/ejic.200300384.

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43

Dickson, Ron S., Gary D. Fallon, W. Roy Jackson, and Anastasios Polas. "Formation and structures of novel polynuclear complexes containing Mo–Mo or Mo–Co bonds with bridging SR or PR2 group." Journal of Organometallic Chemistry 607, no. 1-2 (August 2000): 156–63. http://dx.doi.org/10.1016/s0022-328x(00)00307-7.

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44

Roznyatovsky, V. V., N. E. Borisova, M. D. Reshetova, A. G. Buyanovskaya, and Yu A. Ustynyuk. "Binuclear and polynuclear transition metal complexes with macrocyclic ligands 7. Directed step-by-step synthesis of novel unsymmetric macrocyclic ligands." Russian Chemical Bulletin 54, no. 9 (September 2005): 2219–23. http://dx.doi.org/10.1007/s11172-006-0100-y.

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45

Das, Mahua, and S. A. Shivashankar. "Synthesis, characterization and investigation of the thermal behaviour of six novel polynuclear cobalt and copper complexes for potential application in MOCVD." Applied Organometallic Chemistry 21, no. 1 (January 2007): 15–25. http://dx.doi.org/10.1002/aoc.1160.

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46

Batista de Carvalho, A. L. M., S. F. Parker, L. A. E. Batista de Carvalho, and M. P. M. Marques. "Novel platinum-based anticancer drug: a complete vibrational study." Acta Crystallographica Section C Structural Chemistry 74, no. 5 (April 23, 2018): 628–34. http://dx.doi.org/10.1107/s2053229618005843.

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The introduction of cisplatin to oncology, in the 1970s, marked the onset of the search for novel and improved metal-based anticancer drugs. Polynuclear PtII and PdII complexes with linear alkylamines as bridging ligands are a class of potential antineoplastic agents that have shown promising cytotoxicity against low-prognosis human cancers, such as metastatic breast adenocarcinoma and osteosarcoma. The present study reports an analysis of [μ-N,N′-bis(3-aminopropyl)butane-1,4-diamine-κ4 N,N′:N′′,N′′′]bis[dichloridoplatinum(II)], [Pt2Cl4(C10H26N4)], denoted Pt2Spm (Spm is spermine), by vibrational spectroscopy coupled to theoretical calculations. Within the latter, the Density Functional Theory (DFT – mPW1PW/6-31G*) and Effective Core Potential (ECP – LANL2DZ) approaches were used, in order to ensure the most accurate representation of the molecule and achieve a maximum agreement with the experimental data. The solid-state geometry of Pt2Spm corresponds to Ci symmetry, displaying 132 vibrational modes. A complete assignment of the experimental vibrational profile of the system was attained through the combined application of complementary Raman, FT–IR and Inelastic Neutron Scattering (INS) techniques. INS allowed an unequivocal identification of the CH2 and NH2 rocking modes, not clearly detected by the optical techniques, while Raman measurements led to a clear discrimination of the Pt—N stretching frequencies from the two distinct Pt—N moieties within the chelate. The metal-to-metal distances calculated for the molecule under study were found to allow the establishment of effective inter- and intrastrand crosslinks with DNA. These results will hopefully help to clarify the mode of action of the compound, at the molecular level, contributing to the development of improved cisplatin-like chemotherapeutic drugs having a higher efficacy and specificity coupled to lower acquired resistance and deleterious side effects.
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47

Hannu-Kuure, Milja S., Kaisa Palda'n, Raija Oilunkaniemi, Risto S. Laitinen, and Markku Ahlgrén. "Formation and structural characterization of novel polynuclear palladium selenolato complexes [Pd3Se(SePh)3(PPh3)3]Cl and [Pd6Cl2Se4(SePh)2(PPh3)6]." Journal of Organometallic Chemistry 687, no. 2 (December 2003): 538–44. http://dx.doi.org/10.1016/j.jorganchem.2003.09.010.

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48

Yeşilel, Okan Zafer, Aylin Mutlu, and Orhan Büyükgüngör. "Novel dinuclear and polynuclear copper(II)-pyrazine-2,3-dicarboxylate supramolecular complexes with 1,3-propanediamine, N,N,N′,N′-tetramethylethylenediamine and 2,2′-bipyridine." Polyhedron 28, no. 3 (February 2009): 437–44. http://dx.doi.org/10.1016/j.poly.2008.11.044.

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49

Busetto, Luigi, Fabio Marchetti, Stefano Zacchini, and Valerio Zanotti. "Deprotonation of μ-Vinyliminium Ligands in Diiron Complexes: A Route for the Synthesis of Mono- and Polynuclear Species Containing Novel Multidentate Ligands." Organometallics 24, no. 10 (May 2005): 2297–306. http://dx.doi.org/10.1021/om050095j.

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50

Yam, Vivian Wing-Wah, Ting-Fong Lai, and Chi-Ming Che. "Novel luminescent polynuclear gold(I) phosphine complexes. Synthesis, spectroscopy, and X-ray crystal structure of [Au3(dmmp)2]3+[dmmp = bis(dimethylphosphinomethyl)methylphosphine]." Journal of the Chemical Society, Dalton Transactions, no. 12 (1990): 3747. http://dx.doi.org/10.1039/dt9900003747.

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