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Chakraborty U, Modl M, Mühldorf B, Bodensteiner M, Demeshko S, van Velzen NJC, Scheer M, Harder S, Wolf R. Pentaarylcyclopentadienyl Iron, Cobalt, and Nickel Halides. Inorg Chem 2016; 55:3065-74. [PMID: 26950693 DOI: 10.1021/acs.inorgchem.5b02896] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The preparation of new stable half-sandwich transition metal complexes, having a bulky cyclopentadienyl ligand C5(C6H4-4-Et)5 (Cp(Ar1)) or C5(C6H4-4-nBu)5 (Cp(Ar2)), is reported. The tetrahydrofuran (THF) adduct [Cp(Ar1)Fe(μ-Br)(THF)]2 (1a) was synthesized by reacting K[Cp(Ar1)] with [FeBr2(THF)2] in THF, and its molecular structure was determined by X-ray crystallography. Complex 1a easily loses its coordinated THF molecules under vacuum to form the solvent-free complex [Cp(Ar1)Fe(μ-Br)]2 (1b). The analogous complexes [Cp(Ar1)Co(μ-Br)]2 (2), [Cp(Ar1)Ni(μ-Br)]2 (3), and [Cp(Ar2)Ni(μ-Br)]2 (4) were synthesized from CoBr2 and [NiBr2(1,2-dimethoxyethane)]. The mononuclear, low-spin cobalt(III) and nickel(III) complexes [Cp(Ar2)MI2] (5, M = Co; 6, M = Ni) were prepared by reacting the radical Cp(Ar2) with NiI2 and CoI2. The complexes were characterized by NMR and UV-vis spectroscopies and by elemental analyses. Single-crystal X-ray structure analyses revealed that the dimeric complexes 1a, 1b, and 3 have a planar M2Br2 core, whereas 2 and 4 feature a puckered M2Br2 ring.
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Affiliation(s)
- Uttam Chakraborty
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Moritz Modl
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Bernd Mühldorf
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Michael Bodensteiner
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Serhiy Demeshko
- Institute of Inorganic Chemistry, University of Göttingen , D-37077 Göttingen, Germany
| | - Niels J C van Velzen
- Stratingh Institute for Chemistry , Nijenborgh 4, 9747 AG Groningen, Netherlands
| | - Manfred Scheer
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
| | - Sjoerd Harder
- Stratingh Institute for Chemistry , Nijenborgh 4, 9747 AG Groningen, Netherlands.,Inorganic and Organometallic Chemistry, Friedrich Alexander University Erlangen-Nürnberg , D-91058 Erlangen, Germany
| | - Robert Wolf
- Institute of Inorganic Chemistry, University of Regensburg , D-93040 Regensburg, Germany
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Tagne Kuate AC, Mohapatra SK, Daniliuc CG, Jones PG, Tamm M. Mono- and Dilithiation of [(η7-C7H7)Ti(η5-C5Me5)] (Pentamethyltroticene) for the Synthesis of Troticenyl Monophosphanes and [2]Troticenophanes with C–P and C–Si Bridges. Organometallics 2012. [DOI: 10.1021/om300927r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Alain C. Tagne Kuate
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Swagat K. Mohapatra
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Constantin G. Daniliuc
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Peter G. Jones
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Matthias Tamm
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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4
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Piano stool complexes containing the bulky pentaphenylcyclopentadienyl(C5Ph5) ligand: Preparation, characterization and X-ray structure of C5Ph5Zr(N(CH3)2)3 (I). J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.06.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Hansen JG, Johannsen M. Pentamethylated and pentaphenylated azaferro- and azaruthenocenes: simple and general methodology for the preparation of enantiopure derivatives. J Org Chem 2003; 68:1266-74. [PMID: 12585864 DOI: 10.1021/jo026333r] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A methodology for the enantioselective synthesis of planar chiral 2-substituted 1',2',3',4',5'-pentamethylazaferro- and azaruthenocenes is reported. The key step is the introduction of an enantiopure chiral sulfoxide auxiliary via a selective ortho-lithiation with subsequent chromatographic separation of the resulting diastereomers. Cleaving off the sulfoxide auxiliary by treatment with t-BuLi generates an optically pure anion which may be quenched with a variety of electrophiles to give the optically pure azametallocene derivatives. In addition, it was attempted to extend the methodology to encompass 1',2',3',4',5'-pentaphenyl derivatives. It was, however, not possible to attach the chiral sulfoxide auxiliary onto the pentaphenylated azaferrocene, and for the azaruthenocene case, only one diastereomer could be isolated. Most importantly, the sulfoxide group could be cleaved off and the resulting chiral azaruthenocenyl anion was quenched with paraformaldehyde and iodine, resulting in products with ee values of 85% and 99%, respectively.
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Affiliation(s)
- Jimmi G Hansen
- Department of Chemistry, Technical University of Denmark, Building 201, DK-2800 Kgs. Lyngby, Denmark
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6
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Norinder J, Cotton HK, Bäckvall JE. An efficient route to pentasubstituted acylferrocenes. J Org Chem 2002; 67:9096-8. [PMID: 12467438 DOI: 10.1021/jo026373v] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A number of pentasubstituted acylferrocenes were selectively prepared from ferrous chloride, sodium acylcyclopentadienides, and the corresponding pentasubstituted lithium cyclopentadienides in good yields. The selectivity is governed by the different steric and electronic properties of the acylcyclopentadienides vs the pentasubstituted cyclopentadienides.
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Affiliation(s)
- Jakob Norinder
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Sweden
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7
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Butler DCD, Richards CJ. Synthesis of 1‘-Substituted Derivatives of 1,2,3,4,5-Pentaphenylferrocene. Organometallics 2002. [DOI: 10.1021/om0204989] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David C. D. Butler
- Department of Chemistry, Queen Mary, University of London, Mile End Road, London, E1 4NS, U.K
| | - Christopher J. Richards
- Department of Chemistry, Queen Mary, University of London, Mile End Road, London, E1 4NS, U.K
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8
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Field LD, Hambley TW, Humphrey PA, Masters AF, Turner P. X-ray crystal structure of (eta(5)-pentaphenylcyclopentadienyl)[1-(eta(5/6)-phenyl)-2,3,4,5-tetraphenylcyclopentadienyl]iron(II), [Fe(eta(5)-C(5)Ph(5))[(eta(5/6)-C(6)H(5))C(5)Ph(4)]], a linkage isomer of decaphenylferrocene. Inorg Chem 2002; 41:4618-20. [PMID: 12206681 DOI: 10.1021/ic025592w] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Very dark blue prismatic crystals of [Fe(eta(5)-C(5)Ph(5))[(eta(5/6)-C(6)H(5))(C(5)Ph(4))]], the linkage isomer of decaphenylferrocene, were grown from (3:1 v/v) hexane/ethyl acetate and characterized by single-crystal X-ray diffraction (space group P2(1)/n, R1(F) 0.0404). The iron atom is coordinated to two C(5)Ph(5) ligands: one with an eta(5)-C(5)-configuration and the other with a coordinated arene configuration. The phenyl groups of the (eta(5)-C(5)Ph(5)) ligand are oriented in a "paddle-wheel" arrangement about the C(5) ring, with which four of them make an average angle of approximately 53 degrees, the other, an angle of approximately 42 degrees. The coordinated C(6)H(5) ring of the other ligand is inclined at only approximately 5 degrees to the uncoordinated C(5) ring, with which three of the other four phenyl rings make an average angle of approximately 64 degrees, and the other (opposite the coordinated arene ring), an angle of 38 degrees.
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Affiliation(s)
- Leslie D Field
- School of Chemistry and Heavy Metals Research Centre, The University of Sydney, NSW 2006, Australia
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9
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Li CI, Yeh WY, Peng SM, Lee GH. Reactivity and electronic property of decaphenylmetallocenes of Mo and W atoms. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(00)00809-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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The preparation of mixed ligand ruthenocenes containing bulky cyclopentadienyl ligands. Crystal structures of pentaphenylruthenocene, [Ru(η5-C5Ph5)(η5-C5H5)], pentaparatolylruthenocene, [Ru{η5-C5(p-MeC6H4)5}(η5-C5H5)] and pentaphenylpentamethylruthenocene, [Ru(η5-C5Ph5)(η5-C5Me5)]. J Organomet Chem 1998. [DOI: 10.1016/s0022-328x(98)00622-6] [Citation(s) in RCA: 12] [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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12
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Field L, Hambley T, Humphrey P, Masters A, Turner P. The preparation, crystal structure and some reaction chemistry of Bromo (η5-penta- phenylcyclopentadienyl) dicarbonylosmium (II) , [Os (η5-C5Ph5) (CO) 2Br]. Polyhedron 1998. [DOI: 10.1016/s0277-5387(97)00448-8] [Citation(s) in RCA: 5] [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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Kuksis I, Kovács I, Baird MC, Preston KF. Reactions of the 17-Electron Iron-Centered Radicals {η5-C5Ph5}Fe(CO)2• and {η5-C5Ph4(p-tolyl)}Fe(CO)2• with Organic Halides and Lewis Bases. Organometallics 1996. [DOI: 10.1021/om960596s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Inga Kuksis
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6
| | - Istvan Kovács
- 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
| | - Keith F. Preston
- Steacie Institute for Molecular Sciences, National Research Council, Ottawa, Ontario, Canada K1A 0R9
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Kuksis I, Baird MC. The 18-Electron, Metal−Metal-Bonded Dimers [η5-C5Ph5Fe(CO)2]2 and [η5-C5Ph4(p-tolyl)Fe(CO)2]2: Their Proclivity To Undergo Spontaneous, Thermal Homolysis to the Corresponding 17-Electron Monomers. Organometallics 1996. [DOI: 10.1021/om960323x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Inga Kuksis
- 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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Schumann H, Lentz A, Weimann R, Pickardt J. Decaphenylferrocen und Decaphenylferroceniumtetrafluoroborat. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941061715] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Schumann H. Main group metallocenes with substituted cyclopentadienyl ligands: from bonding problems to discotic phases. PURE APPL CHEM 1991. [DOI: 10.1351/pac199163060813] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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