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Enamullah M, Al-moktadir Zaman M, Bindu MM, Woschko D, Islam MK, Janiak C. Pseudotetrahedral high-spin manganese(II)-complexes with (S or R)-N-1-(Ar)ethyl-salicylaldimine: Chiroptical property, chirality induction at-metal, paramagnetism, redox-potential, PXRD structures and DFT/TDDFT. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Arata S, Suzuki K, Yamaguchi K, Sunada Y. Supersilyl as an effective monodentate ligand to stabilize four-coordinate manganese( ii) complexes. Dalton Trans 2020; 49:17537-17541. [DOI: 10.1039/d0dt03837g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Supersilyl, –Si(SiMe3)3, serves as an effective ligand to afford a series of four-coordinate manganese(ii) complexes.
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Affiliation(s)
- Shogo Arata
- Department of Applied Chemistry
- School of Engineering
- The University of Tokyo
- Tokyo 153-8505
- Japan
| | - Kosuke Suzuki
- Department of Applied Chemistry
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Kazuya Yamaguchi
- Department of Applied Chemistry
- School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Yusuke Sunada
- Department of Applied Chemistry
- School of Engineering
- The University of Tokyo
- Tokyo 153-8505
- Japan
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3
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Majumdar D, Das S, Thomas R, Ullah Z, Sreejith S, Das D, Shukla P, Bankura K, Mishra D. Syntheses, X-ray crystal structures of two new Zn(II)-dicyanamide complexes derived from H2vanen-type compartmental ligands: Investigation of thermal, photoluminescence, in vitro cytotoxic effect and DFT-TDDFT studies. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.04.041] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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4
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Sadlo A, Beer SMJ, Rahman S, Grafen M, Rogalla D, Winter M, Ostendorf A, Devi A. Tailored β-Ketoiminato Complexes of Iron: Synthesis, Characterization, and Evaluation towards Solution-Based Deposition of Iron Oxide Thin Films. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800094] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexander Sadlo
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Sebastian M. J. Beer
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Shafiqur Rahman
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Markus Grafen
- Applied Laser Technologies; Faculty of Mechanical Engineering; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Detlef Rogalla
- RUBION; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Manuela Winter
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Andreas Ostendorf
- Applied Laser Technologies; Faculty of Mechanical Engineering; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Anjana Devi
- Inorganic Materials Chemistry; Ruhr University Bochum; Universitätsstrasse 150 44801 Bochum Germany
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5
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Abstract
The solution structures, stabilities, physical properties, and reactivities of sodium diisopropylamide (NaDA) in a variety of coordinating solvents are described. NaDA is stable for months as a solid or as a 1.0 M solution in N,N-dimethylethylamine (DMEA) at -20 °C. A combination of NMR spectroscopic and computational studies show that NaDA is a disolvated symmetric dimer in DMEA, N,N-dimethyl-n-butylamine, and N-methylpyrrolidine. Tetrahydrofuran (THF) readily displaces DMEA, affording a tetrasolvated cyclic dimer at all THF concentrations. Dimethoxyethane (DME) and N,N,N',N'-tetramethylethylenediamine quantitatively displace DMEA, affording doubly chelated symmetric dimers. The trifunctional ligands N,N,N',N″,N″-pentamethyldiethylenetriamine and diglyme bind the dimer as bidentate rather than tridentate ligands. Relative rates of solvent decompositions are reported, and rate studies for the decomposition of THF and DME are consistent with monomer-based mechanisms.
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Affiliation(s)
- Russell F. Algera
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301, United States,
| | - Yun Ma
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301, United States,
| | - David B. Collum
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853–1301, United States,
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6
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Xue CC, Zhang HY, Zhang DP. Synthesis, crystal structure, and magnetic characterization of two manganese Schiff-base-containing complexes. RUSS J COORD CHEM+ 2017. [DOI: 10.1134/s107032841704008x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Hashimoto T, Kawato Y, Nakajima Y, Ohki Y, Tatsumi K, Ando W, Sato K, Shimada S. Synthesis of dimethylmanganese(II) complexes bearing N-heterocyclic carbenes and nucleophilic substitution reaction of tetraalkoxysilanes by diorganomanganese(II) complexes. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.07.025] [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]
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8
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Justyniak I, Kornowicz A, Prochowicz D, Sokołowski K, Lewiński J. Synthesis and Structure of an Arylmanganese(II) 8-Hydroxyquinolinate Tetranuclear Cluster. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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9
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Meier G, Steck V, Braun B, Eißler A, Herrmann R, Ahrens M, Laubenstein R, Braun T. Synthesis and Structures of Fluorinated (β‐Diketiminato)rhodium Complexes: Si–H Activation of Silanes at a Carbonyl Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402087] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gregor Meier
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Viktoria Steck
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Beatrice Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Anna Eißler
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Roy Herrmann
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Mike Ahrens
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Reik Laubenstein
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
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10
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Pasa S, Ocak YS, Temel H, Kilicoglu T. Synthesis, characterization and catalytic behavior in the Suzuki reaction of Schiff base and its complexes and the optical properties of nickel complex used in the fabrication of a photodiode. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.02.038] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Efficient synthesis and characterization of the low dimensional heteronuclear complexes with a N2O2-donor Schiff base ligand. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.05.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Li Y, Wang JG, Duan T, Chen Q, Zhang QF. Silver(I) and mercury(II) complexes with N,N′-bis(acetylacetone)-1R,2R-diaminocyclohexane ligands exhibiting three different coordination modes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.12.006] [Citation(s) in RCA: 3] [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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13
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Granum DM, Riedel PJ, Crawford JA, Mahle TK, Wyss CM, Begej AK, Arulsamy N, Pierce BS, Mehn MP. Synthesis and characterization of sterically encumbered β-ketoiminate complexes of iron(II) and zinc(II). Dalton Trans 2011; 40:5881-90. [PMID: 21541436 DOI: 10.1039/c1dt10024f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The synthesis, structure, and spectroscopic signatures of a series of four-coordinate iron(II) complexes of β-ketoiminates and their zinc(II) analogues are presented. An unusual five-coordinate iron(II) triflate with three oxygen bound protonated β-ketoimines is also synthesized and structurally characterized. Single-crystal X-ray crystallographic analysis reveals that the deprotonated bis(chelate)metal complexes are four-coordinate with various degrees of distortion depending on the degree of steric bulk and the electronics of the metal center. Each of the high-spin iron(II) centers exhibits multiple electronic transitions including ligand π to π*, metal-to-ligand charge transfer, and spin-forbidden d-d bands. The (1)H NMR spectra of the paramagnetic high-spin iron(II) centers are assigned on the basis of chemical shifts, longitudinal relaxation times (T(1)), relative integrations, and substitution of the ligands. The electrochemical studies support variations in the ligand strength. Parallel mode EPR measurements for the isopropyl substituted ligand complex of iron(II) show low-field resonances (g > 9.5) indicative of complex aggregation or crystallite formation. No suitable solvent system or glassing mixture was found to remedy this phenomenon. However, the bulkier diisopropylphenyl substituted ligand exhibits an integer spin signal consistent with an isolated iron(ii) center [S = 2; D = -7.1 ± 0.8 cm(-1); E/D = 0.1]. A tentative molecular orbital diagram is assembled.
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Affiliation(s)
- David M Granum
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, USA
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14
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Partyka DV. Transmetalation of Unsaturated Carbon Nucleophiles from Boron-Containing Species to the Mid to Late d-Block Metals of Relevance to Catalytic C−X Coupling Reactions (X = C, F, N, O, Pb, S, Se, Te). Chem Rev 2011; 111:1529-95. [DOI: 10.1021/cr1002276] [Citation(s) in RCA: 251] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- David V. Partyka
- Creative Chemistry LLC, 2074 Adelbert Road, Cleveland, Ohio 44106, United States
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15
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Zhang QL, Zhu BX, Zhang YQ, Tao Z, Clegg JK, Lindoy LF, Wei G. Fixed helical Cd(II) coordination polymers assembled from diastereopure Schiff-base ligands derived from condensation of acetylacetone with 1S,2S- and 1R,2R-cyclohexanediamine. INORG CHEM COMMUN 2010. [DOI: 10.1016/j.inoche.2010.05.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Ray A, Rosair GM, Rajeev R, Sunoj RB, Rentschler E, Mitra S. NaI/CuI–II heterometallic cages interconnected by unusual linear 2-coordinate OCN-Cu(I)-NCO links: synthesis, structural, magnetostructural correlation and computational studies. Dalton Trans 2009:9510-9. [DOI: 10.1039/b911938h] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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17
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Zhu BX, Zhang QL, Zhang YQ, Tao Z, Clegg JK, Reimers JR, Lindoy LF, Wei G. Polymeric di- and discrete trinuclear silver(I) assemblies incorporating γ-carbon bonded, neutral acetylacetone-imine motifs assembled from racemic and diastereopure N,N′-bis(acetylacetone)cyclohexanediimine units. Dalton Trans 2009:4896-900. [DOI: 10.1039/b903467f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Zhu BX, Zhang QL, Zhang YQ, Zhu T, Clegg JK, Lindoy LF, Wei G. Four zinc(II) helical coordination polymers and 78-membered six-node zinc metallacycle assembled from diastereopure N,N'-bis(acetylacetone)cyclohexanediimine. Inorg Chem 2008; 47:10053-61. [PMID: 18841959 DOI: 10.1021/ic801329g] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The interaction of the diastereopure N,N'-bis(acetylacetone)cyclohexanediimine ligands, L(1)(1R,2R), L(2)(1S,2S), and their 1:1 mixture, with Zn(II) chloride has been investigated. Four new coordination polymers, [ZnL(1)Cl2 x H2O]n (1), [ZnL(2)Cl2 x H2O]n (2), [ZnL(2)Cl2]n (3), and [Zn6(L(2))6Cl12 x 2 H2O]n (4), each consisting of an infinite single helical chain displaying different pitches and/or handedness have been isolated. The complexed Schiff base ligands are present in their deprotonated enol forms, and the nitrogen atoms, which do not coordinate, are protonated because of proton transfer from the adjacent enol oxygen (coupled with concomitant N-H...O bond formation); each bound ligand is thus pseudo-zwitterionic. The respective zinc centers are bound to two chloro ligands and two oxygen donors from acacH-imine units belonging to different N,N'-bis(acetylacetone)cyclohexanediimine ligands such that the coordination at each zinc is distorted tetrahedral. Compounds 1 and 2, prepared from enantiopure L(1) and L(2), respectively, are enantiomers with similar structures, with the helical pitch in each being 17.0 A. Overall, the structure of 3 may be described as a one-dimensional helical chain with a pitch of 17.3 A, with each period corresponding to two L(2) ligands and two metal centers. The structure of [(Zn6L(2)6Cl12) x 2 H2O]n (4) contains six Zn(II) centers connected via six L(2) ligands to form a "bowed" helical repeat unit, with the pitch of the helix corresponding to 43.5 A. Supramolecular (intra- and intermolecular) aspects of all these unusual polymeric structures are discussed. Finally, the synthesis and characterization of an unprecedented six zinc-node discrete supramolecular assembly, [Zn6(L(1))3(L(2))3Cl12] (5), incorporating a 78-membered metallacycle, is also reported.
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Affiliation(s)
- Bi-Xue Zhu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry, Guizhou Univesity, Guizhou 550025, PR China
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Huang C, Hsueh L, Kuo P, Lee HM, Uno C, Huang J, Tu C, Hu C, Lee G, Hung C. Aluminum Complexes Containing Cyclohexane‐1,2‐diyl Linked Bis(ketiminato) Ligands and Proton‐Promoted Demethylation. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800057] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Abu Youssef MA, Mautner FA, Vicente R. Two new 2D μ-azido, μ-oxalato manganese(II) complexes. Synthesis, structure and magnetic properties. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.02.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Burlov AS, Koshchienko YV, Lyssenko KA, Vasilchenko IS, Alexeev YE, Borodkina IG, Antipin MY, Garnovskii AD. Self-assembling tetranuclear complexes of a tridentate Schiff base. J COORD CHEM 2007. [DOI: 10.1080/00958970701732220] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Anatolii S. Burlov
- a Institute of Physical and Organic Chemistry of Southern Federal University , Stachki av., 194/2, 344090 Rostov-on-Don, Russian Federtation
| | - Yurii V. Koshchienko
- a Institute of Physical and Organic Chemistry of Southern Federal University , Stachki av., 194/2, 344090 Rostov-on-Don, Russian Federtation
| | - Konstantin A. Lyssenko
- b N.A. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilova str., 28, 119991, Moscow, Russian Federation
| | - Igor S. Vasilchenko
- a Institute of Physical and Organic Chemistry of Southern Federal University , Stachki av., 194/2, 344090 Rostov-on-Don, Russian Federtation
| | - Yurii E. Alexeev
- a Institute of Physical and Organic Chemistry of Southern Federal University , Stachki av., 194/2, 344090 Rostov-on-Don, Russian Federtation
| | - Inna G. Borodkina
- a Institute of Physical and Organic Chemistry of Southern Federal University , Stachki av., 194/2, 344090 Rostov-on-Don, Russian Federtation
| | - Mikhail Yu. Antipin
- b N.A. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilova str., 28, 119991, Moscow, Russian Federation
| | - Alexander D. Garnovskii
- a Institute of Physical and Organic Chemistry of Southern Federal University , Stachki av., 194/2, 344090 Rostov-on-Don, Russian Federtation
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Pugh D, Wright JA, Freeman S, Danopoulos AA. 'Pincer' dicarbene complexes of some early transition metals and uranium. Dalton Trans 2005:775-82. [PMID: 16437172 DOI: 10.1039/b512133g] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complexes [(C-N-C)MX(n)(thf)(m)] with the 'pincer' 2,6-bis(imidazolylidene)pyridine, (C-N-C) = 2,6-bis(arylimidazol-2-ylidene)pyridine, aryl = 2,6-Pr(i)2C6H3, M = V, X = Cl, n = 2, m = 1 1a; M = Cr, X = Cl, n = 2, m = 0, 2a, X = Br, 2b; M = Mn, X = Br, n = 2, m = 0, 3; M = Nb, X = Cl, n = 3, m = 0, 4; and M = U, X = Cl, n = 4, m = 0, 5, were synthesised by (a) substitution of labile tmed (1a), thf (2a, 3, 5) or dme (4) by free (C-N-C) or by (b) reaction of the bisimidazolium salt (CH-N-CH)Br2 with {Cr[N(SiMe3)2]2(thf)2} followed by amine elimination (2b). Attempted alkylation of 1a, 2, 3a and 4 with Grignard or alkyl lithiums gave intractable mixtures, and in one case [reaction of 1a with (mesityl)MgBr] resulted in exchange of Cl by Br (1b). Oxidation of 1a or [(C-N-C)VCl3] with 4-methylmorpholine N-oxide afforded the trans-V(C-N-C)(=O)Cl2, 6, which by reaction with AgBF4 in MeCN gave trans-[V(C-N-C)(=O)(MeCN)2][BF4]2, 7. Reaction of 1a with p-tolyl azide gave trans-V(C-N-C)(=N-p-tolyl)Cl2 8. The complex trans-Ti(C-N-C)(=NBu(t))Cl2, 9, was prepared by substitution of the pyridine ligands in Ti(NBu(t))Cl2(py)3 by C-N-C.
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Affiliation(s)
- David Pugh
- School of Chemistry, University of Southampton, Highfield, Southampton, UK SO17 1BJ
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Synthesis, crystal structure and magnetic properties of dinuclear manganese(II) diketonate with cyanopyridine-N-oxide bridging ligands [Mn(hfac)2(4-cpyNO)]2. Polyhedron 2004. [DOI: 10.1016/j.poly.2003.12.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Synthesis, Crystal Structure, and Characterization of Manganese(IV) Complexes with Tridentate Ligands Comprising Mixed Hard-Soft Donors. B KOREAN CHEM SOC 2002. [DOI: 10.5012/bkcs.2002.23.4.613] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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26
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Franceschi F, Guillemot G, Solari E, Floriani C, Re N, Birkedal H, Pattison P. Reduction of dioxygen by a dimanganese unit bonded inside a cavity provided by a pyrrole-based dinucleating ligand. Chemistry 2001; 7:1468-78. [PMID: 11330901 DOI: 10.1002/1521-3765(20010401)7:7<1468::aid-chem1468>3.0.co;2-a] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A novel class of dinucleating ligands has been introduced into manganese chemistry to study the reactivity of this metal towards dioxygen under strictly controlled conditions. Such N4 ligands combine some of the major peculiarities of tetradentate Schiff bases and the porphyrin skeleton. They are derived from the condensation between 2-pyrrolaldehyde and ethylenediamine or o-phenylenediamine, leading to pyrenH2 (LH2, 1), pyrophenH2 (L'H2, 2) and Me2pyrophenH2, (L"H2, 3), respectively. Their metallation with [Mn3-(Mes)6] (Mes = 2,4,6-trimethylphenyl) led to [Mn2L2] (4), [MnL'(thf)2] (5) and [MnL"(thf)2] (6). Complex 4 displays a double-stranded helical structure, while 5 and 6 are mononuclear complexes containing hexacoordinated metals. Regardless of their structure, complexes 5 and 6 behave in a similar manner to 4 in their reaction with dioxygen, namely, as a dimetallic unit inside a cavity defined by two dinucleating ligands. These reactions led to dinuclear MnIII/MnIV oxo-hydroxo derivatives, [Mn2L2(mu-O)(mu-OH)] (7), [Mn2L'2(mu-O)(mu-OH)] (8) and [Mn2L"2(mu-O)(mu-OH)] (9), in which the two Mn ions are strongly antiferromagnetically coupled [J = -53 (7), J = -64 (8), J = -60 cm(-1) (9)]. The crystal structure of 7 could only be solved with synchrotron radiation as the crystals diffracted very poorly and suffered from twisting and disorder. The formation of 7-9 has been proposed to occur through the formation of an intermediate dinuclear hydroperoxo species.
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Affiliation(s)
- F Franceschi
- Institut de Chimie Minérale et Analytique, Université de Lausanne, Switzerland
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Franceschi F, Solari E, Scopelliti R, Floriani C. Metal-Mediated Transfer of Electrons between Two Different C−C Single Bonds That Function as Electron-Donor and Electron-Acceptor Units. Angew Chem Int Ed Engl 2000. [DOI: 10.1002/(sici)1521-3757(20000502)112:9<1751::aid-ange1751>3.0.co;2-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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Cunningham D, McArdle P, Mitchell M, Chonchubhair NN, O'Gara M, Franceschi F, Floriani C. Adduct formation between alkali metal ions and divalent metal salicylaldimine complexes having methoxy substituents. A structural investigation. Inorg Chem 2000; 39:1639-49. [PMID: 12526548 DOI: 10.1021/ic990496p] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sodium, potassium, and cesium salts (iodides, nitrates, acetates, and tetraphenylborates) form 1/1, 1/2 and 2/3 adducts with MLn [M = Co, Ni, Cu, and Zn; n = 1-4; H2L1 = N,N'-(3-methoxysalicyliden)ethane-1,2-diamine; H2L2, H2L3, and H2L4 are the -propane-1,2-diamine, -o-phenylenediamine, and -propane-1,3-diamine analogues of H2L1). Metal salicyladimine, alkali metal, and anion all exert influence on stoichiometry and reactivity. Sodium ions tend to reside within the planes of the salicylaldimine oxygens, as in Na(NO3)(MeOH).NiL4 (1), Na(NO3)(MeOH).CuL1 (2; both with unusual seven-coordinated sodium), and Na.(NiL4)2I.EtOH.H2O (3; with dodecahedral sodium coordination geometry). Potassium and cesium tend to locate between salicylaldimine ligands as in KI.NiL4 (4) and [Cs(NO3).NiL4]3.MeOH (5; structures with infinite sandwich assemblies), CsI.(NiL2)2.H2O (6), CsI3.(NiL4)2 (7; simple sandwich structures), and [K(MeCN)]2.(NiL4)3 (8; a triple-decker sandwich structure). Crystal data for 1 are the following: triclinic, P1, a = 7.3554(6) A, b = 11.2778(10) A, c = 13.562(2) A, alpha = 96.364(10) degrees, beta = 101.924(9) degrees, gamma = 96.809(10) degrees, Z = 2. For 2, triclinic, P1, a = 7.2247(7) A, b = 11.0427(6) A, c = 13.5610(12) A, alpha = 94.804(5) degrees, beta = 98.669(7) degrees, gamma = 99.26(6) Z = 2. For 3, orthorhombic, Pbca, a = 14.4648(19) A, b = 20.968(3) A, c = 28.404(3) A, Z = 8. For 4, triclinic, P1, a = 12.4904(17) A, b = 13.9363(13) A, c = 14.1060(12) A, alpha = 61.033(7) degrees, beta = 89.567(9) degrees, gamma = 71.579(10) degrees, Z = 2. For 5, monoclinic. P2(1)/n, a = 12.5910(2) A, b = 23.4880(2) A, c = 22.6660(2) A, beta = 99.3500(1) degree, Z = 4. For 6, orthorhombic, Pbca, a = 15.752(3) A, b = 23.276(8) A, c = 25.206(6) A, Z = 8. For 7, triclinic, P1, a = 9.6809(11) A, b = 10.0015(13) A, c = 11.2686(13) A, alpha = 101.03 degrees, beta = 90.97 degrees, gamma = 100.55 degrees, Z = 2. For 8, monoclinic, C2/c, a = 29.573(5) A, b = 18.047(3) A, c = 23.184(3) A, beta = 122.860(10) degrees, Z = 8.
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Affiliation(s)
- D Cunningham
- Department of Chemistry, National University of Ireland, Galway, Ireland
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Stern C, Franceschi F, Solari E, Floriani C, Re N, Scopelliti R. The use of macrocyclic and polydentate ligands in ruthenium organometallic chemistry. J Organomet Chem 2000. [DOI: 10.1016/s0022-328x(99)00356-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mederos A, Domı́nguez S, Hernández-Molina R, Sanchiz J, Brito F. Coordinating ability of ligands derived from phenylenediamines. Coord Chem Rev 1999. [DOI: 10.1016/s0010-8545(99)00050-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Giannini L, Dovesi S, Solari E, Floriani C, Chiesi‐Villa A, Rizzoli C. Neutrale, kationische und anionische, an eine Calix[4]aren‐Oxo‐Oberfläche gebundene Wolframalkylderivate. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19990315)111:6<844::aid-ange844>3.0.co;2-#] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Luca Giannini
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH‐1015 Lausanne (Schweiz), Fax: (+ 41) 21‐692‐3905
| | - Silvia Dovesi
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH‐1015 Lausanne (Schweiz), Fax: (+ 41) 21‐692‐3905
| | - Euro Solari
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH‐1015 Lausanne (Schweiz), Fax: (+ 41) 21‐692‐3905
| | - Carlo Floriani
- Institut de Chimie Minérale et Analytique, Université de Lausanne, BCH, CH‐1015 Lausanne (Schweiz), Fax: (+ 41) 21‐692‐3905
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