1
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Wierzba AJ, Gryko DT, Gryko D. Acylation of electrophilic bicyclo[1.1.0]butanes via Co/Ni-catalyzed reductive cross-coupling. J PORPHYR PHTHALOCYA 2021. [DOI: 10.1142/s1088424621500528] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Cyclobutane scaffold is appreciated in medicinal chemistry for its strained, well-defined three-dimensional structure. Consequently, methods for the synthesis of cyclobutyl derivatives have become highly desired, particularly those offering access to compounds with new patterns of substituents. Herein, an acylation of electrophilic strained molecules at the bridgehead carbon with [Formula: see text]-acyl-glutarimides is reported. For this, the polarity-reversal strategy based on cobalt catalysis that enables the generation of cyclobutyl radicals in a strain release event was harnessed. These nucleophilic species, in the presence of a Ni-complex, couple with [Formula: see text]-acyl-glutarimides to give cyclobutyl ketones in decent yields.
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Affiliation(s)
- Aleksandra J. Wierzba
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Daniel T. Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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2
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Yamada S, Matsumoto T, Chang HC. Impact of Group 10 Metals on the Solvent-Induced Disproportionation of o-Semiquinonato Complexes. Chemistry 2019; 25:8268-8278. [PMID: 30963643 DOI: 10.1002/chem.201900172] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Indexed: 01/29/2023]
Abstract
The oxidation of [MII (3,5-DTBCat)(DTBbpy)] (M=Ni ([Ni]), Pd ([Pd]), and Pt ([Pt]); 3,5-DTBCat=3,5-di-tert-butylcatecholato; DTBbpy=4,4'-di-tert-butyl-2,2'-bipyridine) afforded the dimeric {[NiII (3,5-DTBSQ)(DTBbpy)](PF6 )}2 ({[Ni](PF6 )}2 ; 3,5-DTBSQ=3,5-di-tert-butylsemiquinonato) and monomeric semiquinonato (SQ) complexes [MII (3,5-DTBSQ)(DTBbpy)](PF6 ) (M=Pd ([Pd](PF6 )) and Pt ([Pt](PF6 ))). The negative solvatochromic properties of the SQ complexes allowed us to estimate the relative order of their dipole moments: [Pd](PF6 )>[Pt](PF6 )>{[Ni](PF6 )}2 . The complexes [Pd](PF6 ) and [Pt](PF6 ) adopt monomeric structures and are stable in CH2 Cl2 and toluene, whereas they gradually disproportionate at room temperature to [M] and 3,5-di-tert-butylbenzoquinone (3,5-DTBBQ) in polar solvents such as THF, MeOH, EtOH, DMF, or DMSO. The results of spectroscopic studies suggested that the oxidized nickel complex adopts a monomeric structure ([Ni](PF6 )) in CH2 Cl2 , but a dimeric structure ({[Ni](PF6 )}2 ) in the other investigated solvents. In polar solvents, {[Ni](PF6 )}2 may disproportionate to [Ni] and 3,5-DTBBQ at 323 K, thereby demonstrating a significant solvent- and metal-dependence in temperature. The relative activities of {[Ni](PF6 )}2 and [M](PF6 ) toward disproportionation are related to the electrochemically estimated Kdis values in CH2 Cl2 and DMF. The present work demonstrates that solvent polarity and the dipole moments of the SQ complexes promote disproportionation, which can be controlled by a judicious choice of the metal ion, solvent, and temperature.
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Affiliation(s)
- Shota Yamada
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Takeshi Matsumoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Ho-Chol Chang
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
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3
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Plessius R, Orth N, Ivanović-Burmazović I, Siegler MA, Reek JNH, van der Vlugt JI. Reversible multi-electron storage in dual-site redox-active supramolecular cages. Chem Commun (Camb) 2019; 55:12619-12622. [DOI: 10.1039/c9cc07138e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Redox-active M6L4 cages display multiple reversible redox-events, enabling switching from overall +12 to −4 charged species with reversible storage of 16 electrons.
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Affiliation(s)
- Raoul Plessius
- van’t Hoff Institute for Molecular Sciences
- University of Amsterdam
- Amsterdam
- The Netherlands
| | - Nicole Orth
- Department of Chemistry und Pharmacy
- Friedrich Alexander Universität Erlangen-Nürnberg
- 91058 Erlangen
- Germany
| | - Ivana Ivanović-Burmazović
- Department of Chemistry und Pharmacy
- Friedrich Alexander Universität Erlangen-Nürnberg
- 91058 Erlangen
- Germany
| | | | - Joost N. H. Reek
- van’t Hoff Institute for Molecular Sciences
- University of Amsterdam
- Amsterdam
- The Netherlands
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4
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5
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Joseph C, Nesterov VN, Smucker BW. Crystal structure of bis-(aceto-nitrile-κ N)(4,4'-di- tert-butyl-2,2'-bi-pyridine-κ 2N, N')platinum(II) bis-(tetra-fluorido-borate) packing as head-to-head dimers. Acta Crystallogr E Crystallogr Commun 2018; 74:695-697. [PMID: 29850094 PMCID: PMC5947490 DOI: 10.1107/s2056989018005923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 04/16/2018] [Indexed: 11/13/2023]
Abstract
The crystal structure of a platinum(II) supra-molecular building block, [Pt(dbbpy)(NCCH3)2](BF4)2 (dbbpy = 4,4'-di-tert-butyl-2,2'-bi-pyridine, C18H24N2) is an example of a rare head-to-head dimer, even with the bulky tert-butyl groups of the bi-pyridine. This packing motif still enables significant π-π inter-actions between two pyridyl groups, and may result from the close proximity of the tetra-fluorido-borate ions to the platinum(II) complexes, resulting in intra-molecular H⋯F distances between 2.156 and 2.573 Å.
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Affiliation(s)
- Chris Joseph
- Austin College, 900 N Grand, Sherman, TX 75090-4400, USA
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6
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Abramov PA, Dmitriev AA, Kholin KV, Gritsan NP, Kadirov MK, Gushchin AL, Sokolov MN. Mechanistic study of the [(dpp-bian)Re(CO)3Br] electrochemical reduction using in situ EPR spectroscopy and computational chemistry. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.03.111] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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7
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Hsieh HW, Coley CW, Baumgartner LM, Jensen KF, Robinson RI. Photoredox Iridium–Nickel Dual-Catalyzed Decarboxylative Arylation Cross-Coupling: From Batch to Continuous Flow via Self-Optimizing Segmented Flow Reactor. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00018] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Hsiao-Wu Hsieh
- Global Discovery Chemistry − Chemical Technology Group, Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Connor W. Coley
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Lorenz M. Baumgartner
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Klavs F. Jensen
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Richard I. Robinson
- Global Discovery Chemistry − Chemical Technology Group, Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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8
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Nasser N, Fard MA, Boyle PD, Puddephatt RJ. Oxygen atom transfer to platinum(II): A 2-pyridyloxaziridine and a 2-pyridylnitrone as potential oxygen atom donors. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.12.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Abstract
The isolation of terminal oxo complexes of the late transition metals promises new avenues in oxidation catalysis like the selective and catalytic hydroxylation of unreactive CH bonds, the activation of water, or the upgrading of olefins. While terminal oxo ligands are ubiquitous for early transition metals, well-characterized examples with group 10 metals remain hitherto elusive. In search for palladium terminal oxo complexes, the relative stability/reactivity of such compounds are evaluated computationally (CASSCF/NEVPT2; DFT). The calculations investigate only well-known ligand systems with established synthetic procedures and relevance for coordination chemistry and homogeneous catalysis. They delineate and quantify, which electronic properties of ancillary ligands are crucial for taming otherwise highly reactive terminal oxo intermediates. Notably, carbene ligands with both strong σ-donor and strong π-acceptor properties are best suited for the stabilization of palladium(ii) terminal oxo complexes, whereas ligands with a weaker ligand field lead to highly reactive complexes. Strongly donating ligands are an excellent choice for high-valent palladium(iv) terminal oxo compounds. Low coordinate palladium(ii) as well as high-valent palladium(iv) complexes are best suited for the activation of strong bonds.
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Affiliation(s)
- Dominik Munz
- Friedrich-Alexander Universität Erlangen-Nürnberg , Egerlandstr. 1 , 91058 Erlangen , Germany .
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10
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Knopf KM, Murphy BL, MacMillan SN, Baskin JM, Barr MP, Boros E, Wilson JJ. In Vitro Anticancer Activity and in Vivo Biodistribution of Rhenium(I) Tricarbonyl Aqua Complexes. J Am Chem Soc 2017; 139:14302-14314. [PMID: 28948792 PMCID: PMC8091166 DOI: 10.1021/jacs.7b08640] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Seven rhenium(I) complexes of the general formula fac-[Re(CO)3(NN)(OH2)]+ where NN = 2,2'-bipyridine (8), 4,4'-dimethyl-2,2'-bipyridine (9), 4,4'-dimethoxy-2,2'-bipyridine (10), dimethyl 2,2'-bipyridine-4,4'-dicarboxylate (11), 1,10-phenanthroline (12), 2,9-dimethyl-1,10-phenanthroline (13), or 4,7-diphenyl-1,10-phenanthroline (14), were synthesized and characterized by 1H NMR spectroscopy, IR spectroscopy, mass spectrometry, and X-ray crystallography. With the exception of 11, all complexes exhibited 50% growth inhibitory concentration (IC50) values that were less than 20 μM in HeLa cells, indicating that these compounds represent a new potential class of anticancer agents. Complexes 9, 10, and 13 were as effective in cisplatin-resistant cells as wild-type cells, signifying that they circumvent cisplatin resistance. The mechanism of action of the most potent complex, 13, was explored further by leveraging its intrinsic luminescence properties to determine its intracellular localization. These studies indicated that 13 induces cytoplasmic vacuolization that is lysosomal in nature. Additional in vitro assays indicated that 13 induces cell death without causing an increase in intracellular reactive oxygen species or depolarization of the mitochondrial membrane potential. Further studies revealed that the mode of cell death does not fall into one of the canonical categories such as apoptosis, necrosis, paraptosis, and autophagy, suggesting that a novel mode of action may be operative for this class of rhenium compounds. The in vivo biodistribution and metabolism of complex 13 and its 99mTc analogue 13* were also evaluated in naı̈ve mice. Complexes 13 and 13* exhibited comparable biodistribution profiles with both hepatic and renal excretion. High-performance liquid chromatography inductively coupled plasma mass-spectrometry (HPLC-ICP-MS) analysis of mouse blood plasma and urine postadministration showed considerable metabolic stability of 13, rendering this potent complex suitable for in vivo applications. These studies have shown the biological properties of this class of compounds and demonstrated their potential as promising theranostic anticancer agents that can circumvent cisplatin resistance.
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Affiliation(s)
- Kevin M. Knopf
- Department of Chemistry & Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Brendan L. Murphy
- Department of Chemistry & Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Samantha N. MacMillan
- Department of Chemistry & Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Jeremy M. Baskin
- Department of Chemistry & Chemical Biology, Cornell University, Ithaca, NY 14853, USA
- Weill Institute for Cell & Molecular Biology, Cornell University, Ithaca, NY 14853, USA
| | - Martin P. Barr
- Thoracic Oncology Research Group, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, St. James’s Hospital and Trinity College Dublin, Dublin, Ireland
| | - Eszter Boros
- A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, 149 13 Street, Suite 2301, Charlestown, MA 02129, USA
| | - Justin J. Wilson
- Department of Chemistry & Chemical Biology, Cornell University, Ithaca, NY 14853, USA
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11
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Lu T, Yang CF, Zhang LY, Fei F, Chen XT, Xue ZL. Metal Complexes with a Hexadentate Macrocyclic Diamine-Tetracarbene Ligand. Inorg Chem 2017; 56:11917-11928. [DOI: 10.1021/acs.inorgchem.7b01896] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Taotao Lu
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Chu-Fan Yang
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Li-Yi Zhang
- State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Fuzhou 350002, P. R. China
| | - Fan Fei
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xue-Tai Chen
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Zi-Ling Xue
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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12
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Krishnaswamy S, Chand DK. cis-Protected palladium(ii) based binuclear complexes as tectons in crystal engineering and the imperative role of the cis-protecting agent. CrystEngComm 2017. [DOI: 10.1039/c7ce00654c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The shape and molecular packing of cis-protected Pd(ii) based binuclear complexes depends upon the ligand and cis-protecting agents.
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Affiliation(s)
| | - Dillip Kumar Chand
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600036
- India
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13
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Lippert B, Sanz Miguel PJ. More of a misunderstanding than a real mismatch? Platinum and its affinity for aqua, hydroxido, and oxido ligands. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.03.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Lee E, Bae DY, Park S, Oliver AG, Kim Y, Yandulov DV. A Palladium(II) Peroxido Complex Supported by the Smallest Steric N‐Heterocyclic Carbene,
I
Me = 1,3‐Dimethylimidazole‐2‐ylidene, and Its Reactivity by Oxygen‐Atom Transfer. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Eunsung Lee
- Department of Chemistry Stanford University 94305‐5080 Stanford CA USA
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
- Department of Chemistry and Division of Advanced Materials Science Pohang University of Science and Technology 790‐784 Pohang Republic of Korea
| | - Dae Young Bae
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
- Department of Chemistry and Division of Advanced Materials Science Pohang University of Science and Technology 790‐784 Pohang Republic of Korea
| | - Sungho Park
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
| | - Allen G. Oliver
- Department of Chemistry and Biochemistry University of Notre Dame 46556 Notre Dame IN USA
| | - Yonghwi Kim
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
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15
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Behnia A, Boyle PD, Blacquiere JM, Puddephatt RJ. Selective Oxygen Atom Insertion into an Aryl–Palladium Bond. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00387] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ava Behnia
- Department of Chemistry, University of Western Ontario, London, Canada N6A
5B7
| | - Paul D. Boyle
- Department of Chemistry, University of Western Ontario, London, Canada N6A
5B7
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16
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Yin-Bandur L, Sanz Miguel PJ, Rodríguez-Santiago L, Sodupe M, Berghaus M, Lippert B. Multiple Condensation Reactions Involving PtII/PdII−OH2, Pt−NH3, and Cytosine−NH2Groups: New Twists in Cisplatin−Nucleobase Chemistry. Chemistry 2016; 22:13653-68. [DOI: 10.1002/chem.201602244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Lu Yin-Bandur
- Fakultät Chemie und Chemische Biologie (CCB); Technische Universität Dortmund; Otto-Hahn-Str. 6 44221 Dortmund Germany
| | - Pablo J. Sanz Miguel
- Departamento de Química Inorgánica; Instituto de Sintesis Química y Catálisis Homogénea (ISQCH); Universidad de Zaragoza-CSIC; 50009 Zaragoza Spain
| | | | - Mariona Sodupe
- Department da Química; Universitat Autónoma Barcelona; Bellaterra 08193 Barcelona Spain
| | - Melanie Berghaus
- Fakultät Chemie und Chemische Biologie (CCB); Technische Universität Dortmund; Otto-Hahn-Str. 6 44221 Dortmund Germany
| | - Bernhard Lippert
- Fakultät Chemie und Chemische Biologie (CCB); Technische Universität Dortmund; Otto-Hahn-Str. 6 44221 Dortmund Germany
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17
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Kim Y, Park S. Parent-amido (NH2) palladium(II) complexes: Synthesis, reactions, and catalytic hydroamination. CR CHIM 2016. [DOI: 10.1016/j.crci.2015.12.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Zhang Y, Cox JM, Friedman AE, Benedict JB, Cook TR. Phosphorescent organoplatinum(II) D2A2 metallacycles: synthesis, self-assembly, and photophysical properties. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1177824] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Yuzhen Zhang
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Jordan M. Cox
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Alan E. Friedman
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Jason B. Benedict
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - Timothy R. Cook
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
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19
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Nickel-Catalyzed Difluoroalkylation of (Hetero)Arylborons with Unactivated 1-Bromo-1,1-difluoroalkanes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601351] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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20
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Xiao YL, Min QQ, Xu C, Wang RW, Zhang X. Nickel-Catalyzed Difluoroalkylation of (Hetero)Arylborons with Unactivated 1-Bromo-1,1-difluoroalkanes. Angew Chem Int Ed Engl 2016; 55:5837-41. [DOI: 10.1002/anie.201601351] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Indexed: 12/28/2022]
Affiliation(s)
- Yu-Lan Xiao
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Qiao-Qiao Min
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Chang Xu
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Ruo-Wen Wang
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
| | - Xingang Zhang
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Lu Shanghai 200032 China
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21
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Sá J, Czapla-Masztafiak J, Lipiec E, Kayser Y, Kwiatek W, Wood B, Deacon GB, Berger G, Dufrasne F, Fernandes DLA, Szlachetko J. The use of Resonant X-ray Emission Spectroscopy (RXES) for the electronic analysis of metal complexes and their interactions with biomolecules. DRUG DISCOVERY TODAY. TECHNOLOGIES 2015; 16:1-6. [PMID: 26547415 DOI: 10.1016/j.ddtec.2015.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 07/08/2015] [Indexed: 06/05/2023]
Abstract
This review presents a new application of Resonant X-ray Emission Spectroscopy (RXES) to study the mechanism of action of metal containing anticancer derivatives and in particular platinum in situ and in vivo. The technique is an example of a photon-in photon-out X-ray spectroscopic approach, which enables chemical speciation of drugs to be determined and therefore to derive action mechanisms, and to determine drug binding rates under physiological conditions and therapeutic concentrations. This is made feasible due to the atomic specificity and high penetration depth of RXES. The review presents examples of the three main types of information that can be obtained by RXES and establishes an experimental protocol to perfect the measurements within cells.
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Affiliation(s)
- Jacinto Sá
- Department of Chemistry, Ångström Laboratory, Uppsala University, Sweden; Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland.
| | - Joanna Czapla-Masztafiak
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Krakow, Poland; Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland
| | - Ewelina Lipiec
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Krakow, Poland
| | - Yves Kayser
- Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland
| | - Wojciech Kwiatek
- Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Krakow, Poland
| | - Bayden Wood
- Centre for Biospectroscopy, School of Chemistry, Monash University, 3800 Victoria, Australia
| | - Glen B Deacon
- School of Chemistry, Faculty of Science, Monash University, 3800 Victoria, Australia
| | - Gilles Berger
- Laboratoire de Chimie Pharmaceutique Organique, Campus Plaine CP205/5, Université Libre de Bruxelles, Bd du Triomphe, B1050 Brussels, Belgium
| | - François Dufrasne
- Laboratoire de Chimie Pharmaceutique Organique, Campus Plaine CP205/5, Université Libre de Bruxelles, Bd du Triomphe, B1050 Brussels, Belgium
| | | | - Jakub Szlachetko
- Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland; Institute of Physics, Jan Kochanowski University in Kielce, 25-406 Kielce, Poland.
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22
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Dimeric and monomeric palladium(II) parent-amido (NH2) complexes: Synthesis, characterization, and reactivity. CR CHIM 2015. [DOI: 10.1016/j.crci.2015.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Waterman R, Mindiola DJ, Clough CR, Hillhouse GL. Synthesis, structure, and reactivity of platinum compounds featuring terminal amido and phosphido ligands. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.07.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Ingram AJ, Solis-Ibarra D, Zare RN, Waymouth RM. Trinuclear Pd₃O₂ intermediate in aerobic oxidation catalysis. Angew Chem Int Ed Engl 2014; 53:5648-52. [PMID: 24711099 DOI: 10.1002/anie.201400134] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 02/02/2014] [Indexed: 11/06/2022]
Abstract
The activation of O2 is a key step in selective catalytic aerobic oxidation reactions mediated by transition metals. The bridging trinuclear palladium species, [(LPd(II))3(μ(3)-O)2](2+) (L=2,9-dimethylphenanthroline), was identified during the [LPd(OAc)]2(OTf)2-catalyzed aerobic oxidation of 1,2-propanediol. Independent synthesis, structural characterization, and catalytic studies of the trinuclear compound show that it is a product of oxygen activation by reduced palladium species and is a competent intermediate in the catalytic aerobic oxidation of alcohols. The formation and catalytic activity of the trinuclear Pd3O2 species illuminates a multinuclear pathway for aerobic oxidation reactions catalyzed by Pd complexes.
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Affiliation(s)
- Andrew J Ingram
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, CA 94305-5080 (USA)
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25
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Ingram AJ, Solis-Ibarra D, Zare RN, Waymouth RM. Trinuclear Pd3O2Intermediate in Aerobic Oxidation Catalysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400134] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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26
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Lipiec E, Czapla J, Szlachetko J, Kayser Y, Kwiatek W, Wood B, Deacon GB, Sá J. Novel in situ methodology to observe the interactions of chemotherapeutical Pt drugs with DNA under physiological conditions. Dalton Trans 2014; 43:13839-44. [DOI: 10.1039/c4dt00861h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The binding of the antitumor drug cisplatin with DNA was determined by means of in situ resonant inelastic X-ray scattering (RIXS) spectroscopy.
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Affiliation(s)
- Ewelina Lipiec
- The Henryk Niewodniczanski Institute of Nuclear Physics
- 31-342 Kraków, Poland
| | - Joanna Czapla
- The Henryk Niewodniczanski Institute of Nuclear Physics
- 31-342 Kraków, Poland
| | - Jakub Szlachetko
- Paul Scherrer Institute (PSI)
- 5232 Villigen, Switzerland
- Institute of Physics
- Jan Kochanowski University in Kielce
- 25-406 Kielce, Poland
| | - Yves Kayser
- Paul Scherrer Institute (PSI)
- 5232 Villigen, Switzerland
| | - Wojciech Kwiatek
- The Henryk Niewodniczanski Institute of Nuclear Physics
- 31-342 Kraków, Poland
| | - Bayden Wood
- Centre for Biospectroscopy
- School of Chemistry
- Monash University
- Victoria, Australia
| | - Glen B. Deacon
- School of Chemistry
- Faculty of Science
- Monash University
- Victoria, Australia
| | - Jacinto Sá
- Paul Scherrer Institute (PSI)
- 5232 Villigen, Switzerland
- Institute of Physical Chemistry
- Polish Academy of Sciences
- Warsaw, Poland
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27
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Lohr TL, Piers WE, Sgro MJ, Parvez M. Silver ion enhanced C–H activation in Pt(ii) hydroxo complexes. Dalton Trans 2014; 43:13858-64. [DOI: 10.1039/c4dt01934b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Addition of stoichiometric Ag(i) salt to monomeric Pt(ii) hydroxo complexes supported by a bulky diimine ligand results in significantly enhanced rates of C–H activation relative to the silver free systems.
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Affiliation(s)
- Tracy L. Lohr
- Department of Chemistry
- University of Calgary
- Calgary, Canada
| | | | | | - Masood Parvez
- Department of Chemistry
- University of Calgary
- Calgary, Canada
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Saha M, Nasani R, Das M, Mahata A, Pathak B, Mobin SM, Carrella LM, Rentschler E, Mukhopadhyay S. Limiting nuclearity in formation of polynuclear metal complexes through [2 + 3] cycloaddition: synthesis and magnetic properties of tri- and pentanuclear metal complexes. Dalton Trans 2014; 43:8083-93. [DOI: 10.1039/c4dt00378k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cycloaddition reaction between [Ni(L)(N3)] and different organonitriles afforded tetrazolate bridged tri- and pentanuclear nickel(ii) complexes.
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Affiliation(s)
- Manideepa Saha
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Rajendar Nasani
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Mriganka Das
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Arup Mahata
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Biswarup Pathak
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Shaikh M. Mobin
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Luca M. Carrella
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University of Mainz
- D-55128 Mainz, Germany
| | - Eva Rentschler
- Institute of Inorganic and Analytical Chemistry
- Johannes Gutenberg University of Mainz
- D-55128 Mainz, Germany
| | - Suman Mukhopadhyay
- Department of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
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29
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Yoshida T, Matsunaga S, Nomiya K. Novel Intercluster Compounds Composed of a Tetra{phosphanegold(I)}oxonium Cation and an α-Keggin Polyoxometalate Anion Linked by Three Monomeric Phosphanegold(I) Units. CHEM LETT 2013. [DOI: 10.1246/cl.130728] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Takuya Yoshida
- Department of Chemistry, Faculty of Science, Kanagawa University
| | | | - Kenji Nomiya
- Department of Chemistry, Faculty of Science, Kanagawa University
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Martínez-Prieto LM, Real C, Ávila E, Álvarez E, Palma P, Cámpora J. Reversible Reactions of Ni and Pd Hydroxo Pincer Complexes [(iPrPCP)M-OH] with CO2: Solid-State Study of the Decarboxylation of the Monomeric Bicarbonate Complexes [(iPrPCP)M-OCOOH] (M = Ni, Pd). Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300995] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Pellarin KR, Puddephatt RJ. Oxidation of a Dimethylplatinum(II) Complex with Oxaziridines: A Hemiaminal Intermediate but No Oxo Complex. Organometallics 2013. [DOI: 10.1021/om400079b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kyle R. Pellarin
- Department of Chemistry, University of Western Ontario, London, Canada N6A 5B7
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32
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Yoshida T, Matsunaga S, Nomiya K. Two types of tetranuclear phosphanegold(i) cations as dimers of dinuclear units, [{(Au{P(p-RPh)3})2(μ-OH)}2]2+ (R = Me, F), synthesized by polyoxometalate-mediated clusterization. Dalton Trans 2013; 42:11418-25. [DOI: 10.1039/c3dt51412a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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33
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Piccinonna S, Margiotta N, Pacifico C, Lopalco A, Denora N, Fedi S, Corsini M, Natile G. Dinuclear Pt(II)-bisphosphonate complexes: a scaffold for multinuclear or different oxidation state platinum drugs. Dalton Trans 2012; 41:9689-99. [PMID: 22782180 DOI: 10.1039/c2dt30712j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Geminal bisphosphonates (BPs), used in the clinic for the treatment of hypercalcaemia and skeletal metastases, have been also exploited for promoting the specific accumulation of platinum antitumor drugs in bone tissue. In this work, the platinum dinuclear complex [{Pt(en)}(2)(μ-AHBP-H(2))](+) (1) (the carbon atom bridging the two phosphorous atoms carrying a 2-ammonioethyl and a hydroxyl group, AHBP-H(2)) has been used as scaffold for the synthesis of a Pt(II) trinuclear complex, [{Pt(en)}(3)(μ-AHBP)](+) (2), and a Pt(IV) adamantane-shaped dinuclear complex featuring an oxo-bridge, [{Pt(IV)(en)Cl}(2)(μ-O)(μ-AHBP-H(2))](+) (3) (X-ray structure). Compound 2 undergoes a reversible, pH dependent, rearrangement with a neat switch point around pH = 5.4. Compound 3 undergoes a one-step electrochemical reduction at E(pc) = -0.84 V affording compound 1. Such a potential is far lower than that of glutathione (-0.24 V), nevertheless compound 3 can undergo chemical reduction to 1 by GSH, most probably through a different (inner-sphere) mechanism. In vitro cytotoxicity of the new compounds, tested against murine glioma (C6) and human cervix (HeLa) and hepatoma (HepG2) cell lines, has shown that, while the Pt(IV) dimer 3 is inactive up to a concentration of 50 μM, the two Pt(II) polynuclear compounds 1 and 2 have a cytotoxicity comparable to that of cisplatin with the trinuclear complex 2 generally more active than the dinuclear complex 1.
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Affiliation(s)
- Sara Piccinonna
- Dipartimento Farmaco-Chimico, Università degli Studi di Bari, Via E. Orabona 4, 70125 Bari, Italy
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34
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Lohr TL, Piers WE, Parvez M. Monomeric Platinum(II) Hydroxides Supported by Sterically Dominant α-Diimine Ligands. Inorg Chem 2012; 51:4900-2. [DOI: 10.1021/ic300337a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Tracy L. Lohr
- Department of Chemistry, University of Calgary, 2500 University Drive, NW Calgary,
Alberta, Canada
| | - Warren E. Piers
- Department of Chemistry, University of Calgary, 2500 University Drive, NW Calgary,
Alberta, Canada
| | - Masood Parvez
- Department of Chemistry, University of Calgary, 2500 University Drive, NW Calgary,
Alberta, Canada
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35
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Yoshida T, Nomiya K, Matsunaga S. Novel intercluster compound between a heptakis{triphenylphosphinegold(i)}dioxonium cation and an α-Keggin polyoxometalate anion. Dalton Trans 2012; 41:10085-90. [DOI: 10.1039/c2dt30456b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Bonnington KJ, Zhang F, Moustafa MMAR, Cooper BFT, Jennings MC, Puddephatt RJ. Activation of Anisole by Organoplatinum(II) Complexes: Evidence for Rate-Determining C–H Activation. Organometallics 2011. [DOI: 10.1021/om200922a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Kevin J. Bonnington
- Department
of Chemistry, University of Western Ontario, London, Canada N6A 5B7
| | - Fenbao Zhang
- Department
of Chemistry, University of Western Ontario, London, Canada N6A 5B7
| | | | | | - Michael C. Jennings
- Department
of Chemistry, University of Western Ontario, London, Canada N6A 5B7
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37
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Peng KF, Chen CT. Synthesis, Structural Studies, and Catalytic Application of Palladium Complexes Containing Anilido-Oxazolinate Ligands. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100743] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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38
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de Frémont P, Clavier H, Rosa V, Avilés T, Braunstein P. Synthesis, Characterization, and Reactivity of Cationic Gold(I) α-Diimine Complexes. Organometallics 2011. [DOI: 10.1021/om2000426] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pierre de Frémont
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, 67081 Strasbourg, France
| | - Hervé Clavier
- Institut des Sciences Moléculaires de Marseille (UMR 6263), Université Aix-Marseille III, Case A 62, Av. Escadrille Normandie Niemen, 13397 Marseille Cedex 20, France
| | - Vitor Rosa
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, 67081 Strasbourg, France
- REQUIMTE, Departamento de Quimica, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
| | - Teresa Avilés
- REQUIMTE, Departamento de Quimica, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, 67081 Strasbourg, France
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Schau-Magnussen M, Malcho P, Herbst K, Brorson M, Bendix J. Synthesis and X-ray crystal structure of a novel organometallic (μ3-oxido)(μ3-imido) trinuclear iridium complex. Dalton Trans 2011; 40:4212-6. [DOI: 10.1039/c0dt01791d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Cowley RE, DeYonker NJ, Eckert NA, Cundari TR, DeBeer S, Bill E, Ottenwaelder X, Flaschenriem C, Holland PL. Three-coordinate terminal imidoiron(III) complexes: structure, spectroscopy, and mechanism of formation. Inorg Chem 2010; 49:6172-87. [PMID: 20524625 DOI: 10.1021/ic100846b] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction of 1-adamantyl azide with iron(I) diketiminate precursors gives metastable but isolable imidoiron(III) complexes LFe=NAd (L = bulky beta-diketiminate ligand; Ad = 1-adamantyl). This paper addresses (1) the spectroscopic and structural characterization of the Fe=N multiple bond in these interesting three-coordinate iron imido complexes, and (2) the mechanism through which the imido complexes form. The iron(III) imido complexes have been examined by (1)H NMR and electron paramagnetic resonance (EPR) spectroscopies and temperature-dependent magnetic susceptibility (SQUID), and structurally characterized by crystallography and/or extended X-ray absorption fine structure (EXAFS) measurements. These data show that the imido complexes have quartet ground states and short (1.68 +/- 0.01 A) iron-nitrogen bonds. The formation of the imido complexes proceeds through unobserved iron-N(3)R intermediates, which are indicated by QM/MM computations to be best described as iron(II) with an N(3)R radical anion. The radical character on the organoazide bends its NNN linkage to enable easy N(2) loss and imido complex formation. The product distribution between imidoiron(III) products and hexazene-bridged diiron(II) products is solvent-dependent, and the solvent dependence can be explained by coordination of certain solvents to the iron(I) precursor prior to interaction with the organoazide.
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Affiliation(s)
- Ryan E Cowley
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
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42
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Nomiya K, Yoshida T, Sakai Y, Nanba A, Tsuruta S. Intercluster Compound between a Tetrakis{triphenylphosphinegold(I)}oxonium Cation and a Keggin Polyoxometalate (POM): Formation during the Course of Carboxylate Elimination of a Monomeric Triphenylphosphinegold(I) Carboxylate in the Presence of POMs. Inorg Chem 2010; 49:8247-54. [DOI: 10.1021/ic100530h] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kenji Nomiya
- Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa 259-1293, Japan
| | - Takuya Yoshida
- Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa 259-1293, Japan
| | - Yoshitaka Sakai
- Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa 259-1293, Japan
| | - Arisa Nanba
- Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa 259-1293, Japan
| | - Shinichiro Tsuruta
- Department of Materials Science, Faculty of Science, Kanagawa University, Hiratsuka, Kanagawa 259-1293, Japan
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43
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Tyo EC, Castleman AW, Schröder D, Milko P, Roithova J, Ortega JM, Cinellu MA, Cocco F, Minghetti G. Large effect of a small substitution: competition of dehydration with charge retention and coulomb explosion in gaseous [(bipy(R))Au(mu-O)2Au(bipy(R))]2+ dications. J Am Chem Soc 2010; 131:13009-19. [PMID: 19705830 DOI: 10.1021/ja902773b] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dinuclear gold(III) clusters with a rhombic Au(2)O(2) core and 2,2'-bipyridyl ligands substituted in the 6-position (bipy(R)) are examined by tandem mass spectrometry. Electrospray ionization of the hexafluorophosphate salts affords the complexes [(bipy(R))Au(mu-O)(2)Au(bipy(R))](2+) as free dications in the gas phase. The fragmentation behavior of the mass-selected dications is probed by means of collision-induced dissociation experiments which reveal an exceptionally pronounced effect of substitution. Thus, for the parent compound with R = H, i.e., [(bipy)Au(mu-O)(2)Au(bipy)](2+), fragmentation at the dicationic stage prevails to result in a loss of neutral H(2)O concomitant with an assumed rollover cyclometalation of the bipyridine ligands. In marked contrast, all complexes with alkyl substituents in the 6-position of the ligands (bipy(R) with R = CH(3), CH(CH(3))(2), CH(2)C(CH(3))(3), and 2,6-C(6)H(3)(CH(3))(2)) as well as the corresponding complex with 6,6'-dimethyl-2,2'-dipyridyl as a ligand exclusively undergo Coulomb explosion to produce two monocationic fragments. It is proposed that the additional steric strain introduced to the central Au(2)O(2) core by the substituents on the bipyridine ligand, in conjunction with the presence of oxidizable C-H bonds in the substituents, crucially affects the subtle balance between dication dissociation under maintenance of the 2-fold charge and Coulomb explosion into two singly charged fragments.
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Affiliation(s)
- Eric C Tyo
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, USA
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44
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Kuwata S, Ikariya T. Quest for metal/NH bifunctional bioinspired catalysis in a dinuclear platform. Dalton Trans 2010; 39:2984-92. [DOI: 10.1039/b927357c] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Holló-Sitkei E, Szalontai G, Lois I, Gömöry A, Pollreisz F, Párkányi L, Jude H, Besenyei G. Sterically-directed consecutive and size-selective self-assembly of palladium diphosphane complexes with an Ar-BIAN ligand: unexpected formation of pentameric and hexameric aggregates. Chemistry 2009; 15:10620-33. [PMID: 19746472 DOI: 10.1002/chem.200901126] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The coordination properties of N,N'-bis[4-(4-pyridyl)phenyl]acenaphthenequinonediimine (L(1)) and N,N'-bis[4-(2-pyridyl)phenyl]acenaphthenequinonediimine (L(2)) were investigated in self-assembly with palladium diphosphane complexes [Pd(P;P)(H(2)O)(2)](OTf)(2) (OTf = triflate) by using various analytical techniques, including multinuclear ((1)H, (15)N, and (31)P) NMR spectroscopy and mass spectrometry (P;P = dppp, dppf, dppe; dppp = bis(diphenylphosphanyl)propane, dppf = bis(diphenylphosphanyl)ferrocene, and dppe = bis(diphenylphosphanyl)ethane). Beside the expected trimeric and tetrameric species, the interaction of an equimolar mixture of [Pd(dppp)](2+) ions and L(1) also generates pentameric aggregates. Due to the E/Z isomerism of L(1), a dimeric product was also observed. In all of these species, which correspond to the general formula [Pd(dppp)L(1)](n)(OTf)(2n) (n = 2-5), the L(1) ligand is coordinated to the Pd center only through the terminal pyridyl groups. Introduction of a second equivalent of the [Pd(dppp)](2+) tecton results in coordination to the internal, sterically more encumbered chelating site and induces enhancement of the higher nuclearity components. The presence of higher-order aggregates (n = 5, 6), which were unexpected for the interaction of cis-protected palladium corners with linear ditopic bridging ligands, has been demonstrated both by mass-spectrometric and DOSY NMR spectroscopic analysis. The sequential coordination of the [Pd(dppp)](2+) ion is attributed to the dissimilar steric properties of the two coordination sites. In the self-assembled species formed in a 1:1:1 mixture of [Pd(dppp)](2+)/[Pd(dppe)](2+)/L(1), the sterically more demanding [Pd(dppp)](2+) tectons are attached selectively to the pyridyl groups, whereas the more hindered imino nitrogen atoms coordinate the less bulky dppe complexes, thus resulting in a sterically directed, size-selective sorting of the metal tectons. The propensity of the new ligands to incorporate hydrogen-bonded solvent molecules at the chelating site was confirmed by X-ray diffraction studies.
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Affiliation(s)
- Eszter Holló-Sitkei
- Chemical Research Center, Hungarian Academy of Sciences, 1525 Budapest, POB 17, Hungary
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46
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Affiliation(s)
- Jianguo Wu
- 125 Chemistry, University of Missouri−Columbia, Columbia, Missouri 65211
| | - Paul R. Sharp
- 125 Chemistry, University of Missouri−Columbia, Columbia, Missouri 65211
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47
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Netland KA, Graziani O, Krivokapić A, Heyn RH, Tilset M. The synthesis and thermal degradation products of the C–H bond activating complex [(diimine)Pt(Me)(OSO2CF3)]. J COORD CHEM 2009. [DOI: 10.1080/00958970902991757] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Kjetil A. Netland
- a Department of Chemistry , University of Oslo , P. O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Olivier Graziani
- b SINTEF Materials and Chemistry , P. O. Box 124 Blindern, N-0314 Oslo, Norway
| | - Alexander Krivokapić
- a Department of Chemistry , University of Oslo , P. O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Richard H. Heyn
- b SINTEF Materials and Chemistry , P. O. Box 124 Blindern, N-0314 Oslo, Norway
| | - Mats Tilset
- c Department of Chemistry , Centre for Theoretical and Computational Chemistry, University of Oslo , P. O. Box 1033 Blindern, N-0315 Oslo, Norway
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48
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Biswas B, Pieper U, Weyhermüller T, Chaudhuri P. Polynuclear Nickel(II) Complexes: A Magnetostructural Study of NiII4, NiII6, and NiII9 Species with Oxime Ligands. Inorg Chem 2009; 48:6781-93. [DOI: 10.1021/ic9007608] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Biplab Biswas
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Ulrich Pieper
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Thomas Weyhermüller
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Phalguni Chaudhuri
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
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Hadzovic A, Janetzko J, Song D. Novel dinuclear and trinuclear palladium β-diiminate complexes containing amido–chloro double-bridges. Dalton Trans 2008:3279-81. [DOI: 10.1039/b804792h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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