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Relevant bibliographies by topics / Scorpionate complexes

Academic literature on the topic 'Scorpionate complexes'

Author: Grafiati

Published: 10 March 2023

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Journal articles on the topic "Scorpionate complexes"

1

Harb, Carmen, Pavel Kravtsov, Mohommad Choudhuri, Eric R. Sirianni, Glenn P. A. Yap, A. B. P. Lever, and Robert J. Crutchley. "Phenylcyanamidoruthenium Scorpionate Complexes." Inorganic Chemistry 52, no. 3 (January 22, 2013): 1621–30. http://dx.doi.org/10.1021/ic302535h.

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Andrade, Marta A., and Luísa M. D. R. S. Martins. "Novel Chemotherapeutic Agents - The Contribution of Scorpionates." Current Medicinal Chemistry 26, no. 41 (January 8, 2020): 7452–75. http://dx.doi.org/10.2174/0929867325666180914104237.

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: The development of safe and effective chemotherapeutic agents is one of the uppermost priorities and challenges of medicinal chemistry and new transition metal complexes are being continuously designed and tested as anticancer agents. Scorpionate ligands have played a great role in coordination chemistry, since their discovery by Trofimenko in the late 1960s, with significant contributions in the fields of catalysis and bioinorganic chemistry. Scorpionate metal complexes have also shown interesting anticancer properties, and herein, the most recent (last decade) and relevant scorpionate complexes reported for application in medicinal chemistry as chemotherapeutic agents are reviewed. The current progress on the anticancer properties of transition metal complexes bearing homo- or hetero- scorpionate ligands, derived from bis- or tris-(pyrazol-1-yl)-borate or -methane moieties is highlighted.

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3

Martini, Petra, Micol Pasquali, Alessandra Boschi, Licia Uccelli, Melchiore Giganti, and Adriano Duatti. "Technetium Complexes and Radiopharmaceuticals with Scorpionate Ligands." Molecules 23, no. 8 (August 15, 2018): 2039. http://dx.doi.org/10.3390/molecules23082039.

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Scorpionate ligands have played a crucial role in the development of technetium chemistry and, recently, they have also fueled important advancements in the discovery of novel diagnostic imaging agents based on the γ-emitting radionuclide technetium-99m. The purpose of this short review is to provide an illustration of the most general and relevant results in this field, however without being concerned with the details of the analytical features of the various compounds. Thus, emphasis will be given to the description of the general features of technetium complexes with scorpionate ligands including coordination modes, structural properties and an elementary bonding description. Similarly, the most relevant examples of technetium-99m radiopharmaceuticals derived from scorpionate ligands and their potential interest for nuclear imaging will be summarized.

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4

Da Costa, Rosenildo Correa, Benjamin W. Rawe, Nikolaos Tsoureas, Mairi F. Haddow, Hazel A. Sparkes, Graham J. Tizzard, Simon J. Coles, and Gareth R. Owen. "Preparation and reactivity of rhodium and iridium complexes containing a methylborohydride based unit supported by two 7-azaindolyl heterocycles." Dalton Transactions 47, no. 32 (2018): 11047–57. http://dx.doi.org/10.1039/c8dt02311e.

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Tăbăcaru, Aurel, Rais Ahmad Khan, Giulio Lupidi, and Claudio Pettinari. "Synthesis, Characterization and Assessment of the Antioxidant Activity of Cu(II), Zn(II) and Cd(II) Complexes Derived from Scorpionate Ligands." Molecules 25, no. 22 (November 13, 2020): 5298. http://dx.doi.org/10.3390/molecules25225298.

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Seeking to enrich the yet less explored field of scorpionate complexes bearing antioxidant properties, we, here, report on the synthesis, characterization and assessment of the antioxidant activity of new complexes derived from three scorpionate ligands. The interaction between the scorpionate ligands thallium(I) hydrotris(5-methyl-indazolyl)borate (TlTp4Bo,5Me), thallium(I) hydrotris(4,5-dihydro-2H-benzo[g]indazolyl)borate (TlTpa) and potassium hydrotris(3-tert-butyl- pyrazolyl)borate (KTptBu), and metal(II) chlorides, in dichloromethane at room temperature, produced a new family of complexes having the stoichiometric formula [M(Tp4Bo,5Me)2] (M = Cu, 1; Zn, 4; Cd, 7), [M(Tpa)2] (M = Cu, 2; Zn, 5; Cd, 8), [Cu(HpztBu)3Cl2] (3), [Zn(TptBu)Cl] (6) and [Cd(BptBu)(HpztBu)Cl] (9). The obtained metal complexes were characterized by Fourier transform infrared spectroscopy, proton nuclear magnetic resonance and elemental analysis, highlighting the total and partial hydrolysis of the scorpionate ligand TptBu during the synthesis of the Cu(II) complex 3 and the Cd(II) complex 9, respectively. An assessment of the antioxidant activity of the obtained metal complexes was performed through both enzymatic and non-enzymatic assays against 1,1-diphenyl-2-picryl- hydrazyl (DPPH·), 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS+·), hydroxyl (HO·), nitric oxide (NO·), superoxide (O2−) and peroxide (OOH·) radicals. In particular, the complex [Cu(Tpa)2]⋅0.5H2O (2) exhibited significant antioxidant activity, as good and specific activity against superoxide (O2−·), (IC50 values equal to 5.6 ± 0.2 μM) and might be identified as auspicious SOD-mimics (SOD = superoxide dismutase).

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Albertin, Gabriele, Stefano Antoniutti, Marco Bortoluzzi, Jesús Castro, and Lidia Marzaro. "Diazoalkane complexes of ruthenium with tris(pyrazolyl)borate and bis(pyrazolyl)acetate ligands." Dalton Transactions 44, no. 35 (2015): 15470–80. http://dx.doi.org/10.1039/c5dt02113h.

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7

Olyshevets, Iryna, Vladimir Ovchynnikov, Nataliia Kariaka, Viktoriya Dyakonenko, Svitlana Shishkina, Tatiana Sliva, Małgorzata Ostrowska, Aleksandra Jedyńczuk, Elżbieta Gumienna-Kontecka, and Vladimir Amirkhanov. "Lanthanide complexes based on a new bis-chelating carbacylamidophosphate (CAPh) scorpionate-like ligand." RSC Advances 10, no. 42 (2020): 24808–16. http://dx.doi.org/10.1039/d0ra04714g.

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8

Matveeva, Anna G., Anna V. Vologzhanina, Evgenii I. Goryunov, Rinat R. Aysin, Margarita P. Pasechnik, Sergey V. Matveev, Ivan A. Godovikov, Alfiya M. Safiulina, and Valery K. Brel. "Extraction and coordination studies of a carbonyl–phosphine oxide scorpionate ligand with uranyl and lanthanide(iii) nitrates: structural, spectroscopic and DFT characterization of the complexes." Dalton Transactions 45, no. 12 (2016): 5162–79. http://dx.doi.org/10.1039/c5dt04963f.

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9

Silva, Telma F. S., Bruno G. M. Rocha, M. Fátima C. Guedes da Silva, Luísa M. D. R. S. Martins, and Armando J. L. Pombeiro. "V(iv), Fe(ii), Ni(ii) and Cu(ii) complexes bearing 2,2,2-tris(pyrazol-1-yl)ethyl methanesulfonate: application as catalysts for the cyclooctane oxidation." New Journal of Chemistry 40, no. 1 (2016): 528–37. http://dx.doi.org/10.1039/c5nj01865j.

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10

Sirianni, Eric R., Daniel C. Cummins, Glenn P. A. Yap, and Klaus H. Theopold. "FcTp(R) (R=iPr ortBu): third-generation ferrocenyl scorpionates." Acta Crystallographica Section C Structural Chemistry 72, no. 11 (October 5, 2016): 813–18. http://dx.doi.org/10.1107/s205322961601202x.

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Scorpionate (or trispyrazolylborate) ligands have seen much structural variation due to the relative ease of modifying their electronic and steric effects. Second-generation scorpionates were created by increasing the bulk in the 3-position of the pyrazole (pz) ring. A new class of third-generation scorpionates was obtained by modifying the remaining boron substituent. A series of thallium(I) and cobalt(II) complexes of the ferrocenyltris(3-R-pyrazolyl)borate ligand [FcTpR;R= isopropyl (iPr) ortert-butyl (tBu)] have been synthesized in order to expand the range of redox-active third-generation scorpionates. These are [ferrocenyltris(3-tert-butylpyrazol-1-yl-κN2)borato]thallium(I), [FeTl(C5H5)(C26H37BN6)], [ferrocenyltris(3-isopropylpyrazol-1-yl-κN2)borato]thallium(I), [FeTl(C5H5)(C23H31BN6)], chlorido[ferrocenyltris(3-tert-butylpyrazol-1-yl-κN2)borato]cobalt(II), [CoFe(C5H5)(C26H37BN6)Cl], [ferrocenyltris(3-tert-butylpyrazol-1-yl-κN2)borato]iodidocobalt(II) benzene disolvate, [CoFe(C5H5)(C26H37BN6)I]·2C6H6, and [ferrocenyltris(3-isopropylpyrazol-1-yl-κN2)borato]iodidocobalt(II), [CoFe(C5H5)(C23H31BN6)I]. The structures demonstrate that the metal coordination site can easily be modified by using bulkier substituents at the pz 3-position.

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Dissertations / Theses on the topic "Scorpionate complexes"

1

Blagg, Robin Joseph. "Rhodium(I) complexes of sulfur-donor scorpionate ligands." Thesis, University of Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.446152.

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Lopez-Gomez, Maria J. "Scorpionate, boratrane and related complexes of rhodium and iridium." Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508124.

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3

Frazer, Andrew. "Synthesis and characterisation of indium complexes with scorpionate ligands." Thesis, University of Hertfordshire, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358306.

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4

Liang, Shengwen. "Nitrene Transfer Reactions Mediated by Transition Metal Scorpionate Complexes." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1339005115.

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5

Bell, Nicola Louise. "Bridgehead substituted scorpionates providing helically chiral complexes." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7949.

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Tripodal borate ligands, including Tp and Tm, are some of the most widely used in organometallic chemistry and were originally prepared, as anions, from the reaction of the relevant heterocycle with an alkali metal borohydride. However, an alternate route, allowing access to zwitterionic, charge-neutral, scorpionates was recently developed within the Bailey group using tris(dimethylamino)borane as the boron source. This thesis describes the expansion of the borane synthetic route to create new, charge-neutral, zwitterionic, tris(methimazolyl)borate (ZTm) ligands containing B-N, B-O and B-C coordinate bonds. Unusual reactivity with isonitrile donors is also presented which has allowed access to boron substituted anionic Tm ligands from the charge-neutral starting material, (HNMe2)ZTm. Attempts to control the helical chirality of ZTm complexes, by using chiral imidazoline donors on the central boron are also described. The borane synthetic route has allowed access to the novel ligand ZThp, the first example of a tripod based on 2-hydroxypyridine ligand arms. As with Tm, this ligand exhibits helical chirality upon complexation and demonstrates how individual atom hybridisation within the ligand arms affects the helicity and thus the chirality of flexible scorpionate ligands. Coordination studies of both zwitterionic and boron-substituted anionic Tm ligands have shown a tendency for the formation of ‘sandwich’ complexes of the form L2M with some metal precursors, whilst the formation of the corresponding ‘half-sandwich’ complexes of these ligands with ruthenium and rhodium was found to be disfavoured.

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6

Hamilton, Alexander J. "Structural and Computational Investigations into Phosphine and Scorpionate Ligand Complexes." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525458.

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7

PAPINI, Grazia. "New metal complexes supported by scorpionate and macrocyclic ligands: chemistry and biological studies." Doctoral thesis, Università degli Studi di Camerino, 2008. http://hdl.handle.net/11581/401890.

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I and my research group have focused our attention on the study of the coordinative ability of monoanionic heteroscorpionate ligands based on bis(pyrazol-1-yl)methanes containing acetate or sulfonate groups as the third coordinating moiety in particular toward rhenium. The similarity between technetium and rhenium chemistry, in fact, determined a widespread use of the latter as a technetium surrogate to perform macroscopic chemistry of potential radiopharmaceuticals. In this way, a â€˜â€˜cold'' material (the natural isotopic mixture of 185Re and 187Re) can be advantageously manipulated instead of the radioactive nuclide 99gTc (t1/2 = 2.12 105 y, Ea'¢ = 292 keV). On the other hand, rhenium has two a'¢- emitters isotopes 186Re (a'¢-max = 1.07 max = 2.10 MeV; t1/2 = 17 h) which are of great interest to nuclear medicine due to their physical and nuclear properties finalized to a potential application in the radiopharmaceutical. For this reason, a renewed interest in rhenium coordination chemistry fluourished, finalized to a potential application in the radiopharmaceutical field of rhenium itself, which was no longer considered as a mere technetium substitute for chemical investigations at macroscopic level. In the past few years the so-called â€˜â€˜metal fragment'' strategy for the synthesis of new technetium and rhenium radiopharmaceuticals revealed to be a promising approach. This methodology is based on the preparation of intermediate species comprising a stable building- block constituted by the metal and suitable ancillary ligands and labile modentate groups (e.g., water molecules or halide groups), which can be easily replaced by chelating bi- or tri-dentate ligands eventually conjugated to a specific biomolecule. According to this strategy, we have reported on a new class of compounds containing the stable metal fragment [Re(O)(NNO)]2+ (N,N,O = tripodal heteroscorpionate ligand). In fact, in order to stabilize the monooxo rhenium core, heteroscorpionate ligands were chosen due to their coordinative flexibility and proper (facial) stereochemical arrangement. In particular, monoanionic bis(pyrazol-1-yl)methane derivatives, containing acetate (Hbpza = bis(pyrazol-1-yl)acetate; Libdmpza = Lithium[Bis(3,5-dimethylpyrazol-1-yl)acetate]) or sulfonate groups (Libdmpzs = Lithium[Bis(3,5-dimethylpyrazol-1-yl)methanesulfonate]), by reaction with [NBu4][Re(O)Cl4], gave a series of intermediate compounds Re(O)(NNO)Cl(X), where the octahedral coordination sphere is filled with two modentate groups (X = Cl or OR) whose structure depends on the type of NNO ligand and solvent utilized. Besides, we have seen that the effectiveness of replacement of two modentate groups of intermediate species with a bidentate chelate (ethylene glycol, malonic acid and 1,3-propandiol) depends on the nature of the heteroscorpionate, and that the substitution takes place easily when N,N,O ligand bear methylated pyrazolyl rings

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8

Doyle, Garry Anthony. "The syntheses and characterisation of some halogenonitrosyl hydrotris(3,5-dimethylpyrazol-1-yl)borato complexes of molybdenum." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313082.

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9

Meinholz, Margret [Verfasser], Dietmar [Akademischer Betreuer] Stalke, Franc [Akademischer Betreuer] Meyer, and Lutz [Akademischer Betreuer] Ackermann. "Metal complexes of Scorpionate-Like Polyimido Sulphur Phosphanyl Ligands / Margret Meinholz. Gutachter: Dietmar Stalke ; Franc Meyer ; Lutz Ackermann. Betreuer: Dietmar Stalke." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2011. http://d-nb.info/1043992413/34.

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10

Aboelenen, Ahmed. "Development of 3d Transition Metal Complexes of Hydrotris(pyrazolyl)borates (Tp) asRedox Catalysts." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1572809656086338.

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Books on the topic "Scorpionate complexes"

1

Ghana, Priyabrata. Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02625-7.

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Ghana, Priyabrata. Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands. Springer, 2018.

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Book chapters on the topic "Scorpionate complexes"

1

Martins, Luísa M. D. R. S., and Armando J. L. Pombeiro. "Carbon-Scorpionate Complexes in Oxidation Catalysis." In Advances in Organometallic Chemistry and Catalysis, 285–94. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118742952.ch22.

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Martins, Luísa M. D. R. S. "Alkane Oxidation with C-Scorpionate Metal Complexes." In Alkane Functionalization, 113–23. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781119379256.ch6.

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Ghana, Priyabrata. "µ-Ylido Complexes." In Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands, 115–28. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02625-7_7.

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4

Ghana, Priyabrata. "Chemistry of the Metallatetrylidyne Complexes." In Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands, 129–63. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02625-7_8.

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5

Santos, Isabel, António Paulo, and João D. G. Correia. "Rhenium and Technetium Complexes Anchored by Phosphines and Scorpionates for Radiopharmaceutical Applications." In Contrast Agents III, 45–84. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/b101224.

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Ghana, Priyabrata. "Closed Shell Heavier Tetrylidyne Complexes of Group 6 Metals." In Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands, 19–75. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02625-7_2.

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7

Ghana, Priyabrata. "Open-Shell Heavier Tetrylidyne Complexes of Group 6 Transition Metals." In Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands, 77–81. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02625-7_3.

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8

Ghana, Priyabrata. "A New Method for the Synthesis of Manganese Tetrylidyne Complexes." In Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands, 87–102. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02625-7_5.

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Ghana, Priyabrata. "Introduction." In Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands, 1–15. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02625-7_1.

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Ghana, Priyabrata. "Access to the First NHC-Stabilized Disilavinylidene." In Synthesis, Characterization and Reactivity of Ylidyne and μ-Ylido Complexes Supported by Scorpionato Ligands, 179–91. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02625-7_10.

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