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Lv Z, Jiang Y, Zhou C, Guo Z, Ma X, Chen Q, Nie T, Song H. Synthesis and evaluation of stable, efficient, and recyclable carbonylation catalysts: Polyether-substituted lmidazolium carbonyl cobalt lonic liquids. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.01.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Canty AJ, Sharma M. η1-Alkynyl Chemistry for the Higher Oxidation States of Palladium and Platinum. TOP ORGANOMETAL CHEM 2011. [DOI: 10.1007/978-3-642-17429-2_5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Ungvári N, Fördős E, Balogh J, Kégl T, Párkányi L, Ungváry F. Triphenylphosphane-Modified Cobalt Catalysts for the Selective Carbonylation of Ethyl Diazoacetate. Organometallics 2010. [DOI: 10.1021/om100480v] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Neszta Ungvári
- Department of Organic Chemistry, University of Pannonia, 8201 Veszprém, Egyetem u. 10, Hungary
| | - Eszter Fördős
- Department of Organic Chemistry, University of Pannonia, 8201 Veszprém, Egyetem u. 10, Hungary
| | - János Balogh
- Department of Organic Chemistry, University of Pannonia, 8201 Veszprém, Egyetem u. 10, Hungary
| | - Tamás Kégl
- Department of Organic Chemistry, University of Pannonia, 8201 Veszprém, Egyetem u. 10, Hungary
| | - László Párkányi
- Institute of Structural Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
| | - Ferenc Ungváry
- Department of Organic Chemistry, University of Pannonia, 8201 Veszprém, Egyetem u. 10, Hungary
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Canty AJ. Organopalladium and platinum chemistry in oxidising milieu as models for organic synthesis involving the higher oxidation states of palladium. Dalton Trans 2009:10409-17. [PMID: 20023859 DOI: 10.1039/b914080h] [Citation(s) in RCA: 149] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This perspective focuses on the higher oxidation state (III, IV) organometallic chemistry of palladium involving a range of strong oxidants, with consideration of platinum chemistry where it is informative for the evaluation of structure and mechanism. Particular emphasis is placed on hypervalent iodine reagents, halogens and related oxidants of intense current interest in organic synthesis, together with linkages in concepts between this chemistry and recent advances in studies of diaryl disulfides, diaryl diselenides, and diaryl peroxides as oxidants.
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Affiliation(s)
- Allan J Canty
- School of Chemistry, University of Tasmania, Hobart, Tasmania, Australia.
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Canty AJ, Rodemann T, Ryan JH. Transition Metal Organometallic Synthesis Utilising Diorganoiodine(III) Reagents. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2007. [DOI: 10.1016/s0065-3055(07)55005-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Deng FG, Hu B, Sun W, Chen J, Xia CG. Novel pyridinium based cobalt carbonyl ionic liquids: synthesis, full characterization, crystal structure and application in catalysis. Dalton Trans 2007:4262-7. [PMID: 17893815 DOI: 10.1039/b709800f] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Through an optimized synthetic strategy, a series of novel alkylpyridinium cobalt tetracarbonyl salts, [C(1)Py][Co(CO)(4)] (), [C(4)Py][Co(CO)(4)] () and [C(16)Py][Co(CO)(4)] () (C(n)Py = N-C(n)H(2n+1)-pyridinium), were successfully prepared in good yields, using a water-organic biphasic system. All the three compounds melt well below 100 degrees C and could be classified as ionic liquids. The compounds were fully characterized using IR, UV-Vis, (1)H NMR, (13)C NMR, ESI-MS and elemental analysis, and was structurally characterized by X-ray single crystal analysis. Compound has been found to be an efficient and reusable catalyst for the alkoxycarbonylation of propylene oxide without the aid of a base additive.
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Affiliation(s)
- Fan-Guo Deng
- State key laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P R China
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Formation and multinuclear magnetic resonance investigation of silylammonium tetracarbonylcobaltate contact ion pairs. OPEN CHEM 2006. [DOI: 10.2478/s11532-006-0005-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractSilylcobalt tetracarbonyls were reacted with various amines (B) in non-polar solvents to form silylammonium tetracarbonylcobaltate contact ion pairs formulated as [BSiR3+, −Co(CO)4]. The compounds were characterized by IR and multinuclear magnetic resonance spectroscopy both in solution and in solid state. Their properties are analogous to the known ion pairs [BH+, −Co(CO)4] and to amine adducts of halosilanes as well.
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Thompson DM, Bengough M, Baird MC. Anionic Fullerene-60 Complexes of Manganese(−I), Cobalt(−I), and Rhenium(−I): Thermal and Photoinduced Electron Transfer Processes between Metal Carbonylate Anions and C60. Organometallics 2002. [DOI: 10.1021/om020396i] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David M. Thompson
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - M. Bengough
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - Michael C. Baird
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6
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Lucia LA, Abboud K, Schanze KS. Outer Sphere Metal-to-Ligand Charge Transfer in Organometallic Ion Pairs. Inorg Chem 1997. [DOI: 10.1021/ic970351n] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lucian A. Lucia
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200
| | - Khalil Abboud
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200
| | - Kirk S. Schanze
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200
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Della Pergola R, Cinquantini A, Diana E, Garlaschelli L, Laschi F, Luzzini P, Manassero M, Repossi A, Sansoni M, Stanghellini PL, Zanello P. Iron-Rhodium and Iron-Iridium Mixed-Metal Nitrido-Carbonyl Clusters. Synthesis, Characterization, Redox Properties, and Solid-State Structure of the Octahedral Clusters [Fe(5)RhN(CO)(15)](2)(-), [Fe(5)IrN(CO)(15)](2)(-), and [Fe(4)Rh(2)N(CO)(15)](-). Infrared and Nuclear Magnetic Resonance Spectroscopic Studies on the Interstitial Nitride. Inorg Chem 1997; 36:3761-3771. [PMID: 11670071 DOI: 10.1021/ic961451g] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The cluster [Fe(5)RhN(CO)(15)](2)(-) was synthesized in 40% yield from [Fe(4)N(CO)(12)](-) and [Rh(CO)(4)](-) in refluxing tetrahydrofuran, whereas the analogous anion [Fe(5)IrN(CO)(15)](2)(-) was prepared in CH(3)CN at room temperature from [Fe(6)N(CO)(15)](3)(-) and [Ir(C(8)H(14))(2)Cl](2); the yields are higher than 60%. The monoanion [Fe(4)Rh(2)N(CO)(15)](-) was obtained in 70% yield from [Fe(5)RhN(CO)(15)](2)(-) and hydrated RhCl(3). The solid-state structures of the three anions were determined on their [PPh(4)](+) salts: the six metal atoms are arranged in octahedral cages and are coordinated to 3 edge-bridging and 12 terminal carbonyl ligands and to a &mgr;(6)-N ligand. The Rh and Ir atoms have less terminal COs than Fe, in order to equalize the excess electrons at the d(9) metal centers. The two rhodium atoms in [Fe(4)Rh(2)N(CO)(15)](-) are directly bound. The (15)N NMR spectra of the three compounds have been recorded; the signals of the nitride ligands were found at delta = 514 ppm for the dianions and 470 ppm for [Fe(4)Rh(2)N(CO)(15)](-); any group 9 atom shifts the resonance of nitrogen to higher fields. The coupling constants J((15)N-(103)Rh) are 8-9 Hz. The vibrational patterns of the metal cores have been interpreted on the basis of an idealized M(6) octahedral arrangement, subsequently modified by the perturbations given by different atomic masses and M-M stretching force constants. The motions of the nitrogen are related to the idealized symmetry of the cage; the M-N force constant values depend on the type of metal and on the charge of the anion. The dianions [Fe(5)MN(CO)(15)](2)(-) can be electrochemically oxidized at -20 degrees C to their short-lived monoanions, which can be characterized by EPR spectroscopy. In contrast, the cluster [Fe(4)Rh(2)N(CO)(15)](-) undergoes a single-step 2-electron reduction to the partially stable trianion [Fe(4)Rh(2)N(CO)(15)](3)(-), which was also characterized by EPR spectroscopy. The Fe-Rh nitride clusters are active catalysts for the hydroformylation of 1-pentene, but display low selectivity (35-65%) in n-hexanal and are demolished under catalytic conditions.
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Affiliation(s)
- Roberto Della Pergola
- Dipartimento di Chimica Inorganica, Metallorganica ed Analitica and Centro del CNR, Università di Milano, via G. Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica and Centro del CNR, Università di Milano, via G. Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica I.F.M., Università di Torino, via P. Giuria 7, 10125 Torino, Italy, and Dipartimento di Chimica dell' Università, Pian dei Mantellini 44, 53100 Siena, Italy
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Michael Bockman T, Kochi JK. Nucleophilic addition versus electron transfer in carbonylmetallate salts. Donor-acceptor interactions in the precursor ion pairs. J PHYS ORG CHEM 1997. [DOI: 10.1002/(sici)1099-1395(199707)10:7<542::aid-poc918>3.0.co;2-o] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Rathore R, Kochi JK. alpha-Nitration of Ketones via Enol Silyl Ethers. Radical Cations as Reactive Intermediates in Thermal and Photochemical Processes. J Org Chem 1996; 61:627-639. [PMID: 11666984 DOI: 10.1021/jo9515687] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Highly colored (red) solutions of various enol silyl ethers and tetranitromethane (TNM) are readily bleached to afford good yields of alpha-nitro ketones in the dark at room temperature or below. Spectral analysis show the red colors to be associated with the intermolecular 1:1 electron donor-acceptor (EDA) complexes between the enol silyl ether and TNM. The formation of similar vividly colored EDA complexes with other electron acceptors (such as chloranil, tetracyanobenzene, tetracyanoquinodimethane, etc.) readily establish enol silyl ethers to be excellent electron donors. The deliberate irradiation of the diagnostic (red) charge-transfer absorption bands of the EDA complexes of enol silyl ethers and TNM at -40 degrees C affords directly the same alpha-nitro ketones, under conditions in which the thermal reaction is too slow to compete. A common pathway is discussed in which the electron transfer from the enol silyl ether (ESE) to TNM results in the radical ion triad [ESE(*)(+), NO(2)(*), C(NO(2))(3)(-)]. A subsequent fast homolytic coupling of the cation radical of the enol silyl ether with NO(2)(*)() leads to the alpha-nitro ketones. The use of time-resolved spectroscopy and the disparate behavior of the isomeric enol silyl ethers of alpha- and beta-tetralones as well as of 2-methylcyclohexanone strongly support cation radicals (ESE(*)(+)) as the critical intermediate in thermal and photoinduced electron-transfer as described in Schemes 1 and 2, respectively.
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Affiliation(s)
- Rajendra Rathore
- Department of Chemistry, University of Houston, Houston, Texas 77204-5641
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Pampaloni G, Koelle U. Chemical and electrochemical studies on metal carbonyl/cobaltocene systems. J Organomet Chem 1994. [DOI: 10.1016/0022-328x(94)85002-x] [Citation(s) in RCA: 7] [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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Electron Transfer in the Thermal and Photochemical Activation of Electron Donor-Acceptor Complexes in Organic and Organometallic Reactions. ADVANCES IN PHYSICAL ORGANIC CHEMISTRY 1994. [DOI: 10.1016/s0065-3160(08)60077-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Charge-transfer ion pairs with cationic bis(arene)iron(II) acceptors. Thermal electron-transfer catalysis of aromatic de-ligation. J Organomet Chem 1993. [DOI: 10.1016/0022-328x(93)83015-n] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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