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Arndt P, Schubert K, Burlakov VV, Spannenberg A, Rosenthal U. Crystal structure of di-n-but-yl-bis-(η (5)-penta-methyl-cyclo-penta-dien-yl)hafnium(IV). ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2015; 71:m19-20. [PMID: 25878834 PMCID: PMC4384584 DOI: 10.1107/s2056989015000092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 01/05/2015] [Indexed: 11/20/2022]
Abstract
The crystal structure of the title compound, [Hf(C10H15)2(C4H9)2], reveals two independent molecules in the asymmetric unit. The diffraction experiment was performed with a racemically twinned crystal showing a 0.529 (5):0.471 (5) component ratio. Each HfIV atom is coordinated by two pentamethylcyclopentadienyl and two n-butyl ligands in a distorted tetrahedral geometry, with the cyclopentadienyl rings inclined to one another by 45.11 (15) and 45.37 (16)°. In contrast to the isostructural di(n-butyl)bis(η5-pentamethylcyclopentadienyl)zirconium(IV) complex with a noticeable difference in the Zr–butyl bonding, the Hf—Cbutyl bond lengths differ from each other by no more than 0.039 (3) Å.
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Affiliation(s)
- Perdita Arndt
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Kathleen Schubert
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Vladimir V Burlakov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov St 28, 119991, Moscow, Russian Federation
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Uwe Rosenthal
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock, Germany
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Cyanide–isocyanide isomers in polynuclear complexes. Reactivity and theoretical studies. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(03)00274-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Lagoa ALC, Diogo HP, Minas da Piedade ME, Schwarz K, Epple M. Driving Force for the Thermally Induced Solid State Polymerization of Alkali Metal Halogenoacetates: A Thermochemical Analysis. J Phys Chem B 2002. [DOI: 10.1021/jp014361s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Diogo HP, Minas da Piedade ME, Martinho Simões JA, Teixeira C. Organometallic thermochemistry at CQE-IST. An overview. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(01)00861-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hughes RP, Maddock SM, Guzei IA, Liable-Sands LM, Rheingold AL. Reactions of halofluorocarbons with group 6 complexes M(C(5)H(5))(2)L (M = Mo, W; L = C(2)H(4), CO). Fluoroalkylation at molybdenum and tungsten, and at cyclopentadienyl or ethylene ligands. J Am Chem Soc 2001; 123:3279-88. [PMID: 11457063 DOI: 10.1021/ja003339u] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The molybdenum(II) and tungsten(II) complexes [MCp(2)L] (Cp = eta(5)-cyclopentadienyl; L = C(2)H(4), CO) react with perfluoroalkyl iodides to give a variety of products. The Mo(II) complex [MoCp(2)(C(2)H(4))] reacts with perfluoro-n-butyl iodide or perfluorobenzyl iodide with loss of ethylene to give the first examples of fluoroalkyl complexes of Mo(IV), MoCp(2)(CF(2)CF(2)CF(2)CF(3))I (8) and MoCp(2)(CF(2)C(6)F(5))I (9), one of which (8) has been crystallographically characterized. In contrast, the CO analogue [MoCp(2)(CO)] reacts with perfluorobenzyl iodide without loss of CO to give the crystallographically characterized salt, [MoCp(2)(CF(2)C(6)F(5))(CO)](+)I(-) (10), and the W(II) ethylene precursor [WCp(2)(C(2)H(4))] reacts with perfluorobenzyl iodide without loss of ethylene to afford the salt [WCp(2)(CF(2)C(6)F(5))(C(2)H(4))](+)I(-) (11). These observations demonstrate that the metal-carbon bond is formed first. In further contrast the tungsten precursor [WCp(2)(C(2)H(4))] reacts with perfluoro-n-butyl iodide, perfluoro-iso-propyl iodide, and pentafluorophenyl iodide to give fluoroalkyl- and fluorophenyl-substituted cyclopentadienyl complexes WCp(eta(5)-C(5)H(4)R(F))(H)I (12, R(F) = CF(2)CF(2)CF(2)CF(3); 15, R(F) = CF(CF(3))(2); 16, R(F) = C(6)F(5)); the Mo analogue MoCp(eta(5)-C(5)H(4)R(F))(H)I (14, R(F) = CF(CF(3))(2)) is obtained in similar fashion. The tungsten(IV) hydrido compounds react with iodoform to afford the corresponding diiodides WCp(eta(5)-C(5)H(4)R(F))I(2) (13, R(F) = CF(2)CF(2)CF(2)CF(3); 18, R(F) = CF(CF(3))(2); 19, R(F) = C(6)F(5)), two of which (13 and 19) have been crystallographically characterized. The carbonyl precursors [MCp(2)(CO)] each react with perfluoro-iso-propyl iodide without loss of CO, to afford the exo-fluoroalkylated cyclopentadiene M(II) complexes MCp(eta(4)-C(5)H(5)R(F))(CO)I (21, M = Mo; 22, M = W); the exo-stereochemistry for the fluoroalkyl group is confirmed by an X-ray structural study of 22. The ethylene analogues [MCp(2)(C(2)H(4))] react with perfluoro-tert-butyl iodide to yield the products MCp(2)[(CH(2)CH(2)C(CF(3))(3)]I (25, M = Mo; 26, M = W) resulting from fluoroalkylation at the ethylene ligand. Attempts to provide positive evidence for fluoroalkyl radicals as intermediates in reactions of primary and benzylic substrates were unsuccessful, but trapping experiments with CH(3)OD (to give R(F)D, not R(F)H) indicate that fluoroalkyl anions are the intermediates responsible for ring and ethylene fluoroalkylation in the reactions of secondary and tertiary fluoroalkyl substrates.
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Affiliation(s)
- R P Hughes
- Department of Chemistry, Burke Chemistry Laboratory, Dartmouth College, Hanover, New Hampshire 03755-3564, USA
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Luo L, Lanza G, Fragalà IL, Stern CL, Marks TJ. Energetics of Metal−Ligand Multiple Bonds. A Combined Solution Thermochemical and ab Initio Quantum Chemical Study of MO Bonding in Group 6 Metallocene Oxo Complexes. J Am Chem Soc 1998. [DOI: 10.1021/ja971010b] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lubin Luo
- Contribution from the Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, Dipartimento di Chimica, Università della Basilicata, 85100 Potentza, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, 95125 Catania, Italy
| | - Giuseppe Lanza
- Contribution from the Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, Dipartimento di Chimica, Università della Basilicata, 85100 Potentza, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, 95125 Catania, Italy
| | - Ignazio L. Fragalà
- Contribution from the Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, Dipartimento di Chimica, Università della Basilicata, 85100 Potentza, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, 95125 Catania, Italy
| | - Charlotte L. Stern
- Contribution from the Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, Dipartimento di Chimica, Università della Basilicata, 85100 Potentza, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, 95125 Catania, Italy
| | - Tobin J. Marks
- Contribution from the Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, Dipartimento di Chimica, Università della Basilicata, 85100 Potentza, Italy, and Dipartimento di Scienze Chimiche, Università di Catania, 95125 Catania, Italy
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Amor F, Spaniol TP, Okuda J. Remarkably Robust Group 4 Metal Half-Sandwich Complexes Containing Two Higher Alkyl Ligands: X-ray Structure and Reactivity of the Di-n-butyl Complex [Hf(η5:η1:η1-C5Me4SiMe2NCH2CH2OMe)nBu2]. Organometallics 1997. [DOI: 10.1021/om970446x] [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)
- Francisco Amor
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, J.-J.-Becher-Weg 24, D-55099 Mainz, Germany
| | - Thomas P. Spaniol
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, J.-J.-Becher-Weg 24, D-55099 Mainz, Germany
| | - Jun Okuda
- Institut für Anorganische Chemie und Analytische Chemie der Johannes Gutenberg-Universität, J.-J.-Becher-Weg 24, D-55099 Mainz, Germany
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Energetics of the oxidative addition of I2 to [Ir(Μ-L)(CO)2]2 (L=S t Bu, 3,5-Me2pz,7-aza) complexes. X-ray structures of Ir(Μ-S t Bu)(I)(CO)2]2 and [Ir(Μ-3,5-Me2pz)(I)(CO)2]2. Struct Chem 1996. [DOI: 10.1007/bf02275160] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mise T, Maeda M, Nakajima T, Kobayashi K, Shimizu I, Yamamoto Y, Wakatsuki Y. Preparation and structure of the first ansa-molybdenocene and tungstenocene derivatives. Reaction of [O(SiMe2C5H4)2]MoH2 with methyl methacrylate to probe the olefin attacking site. J Organomet Chem 1994. [DOI: 10.1016/0022-328x(94)80116-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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de Azevedo CG, de C.T. Carrondo MA, Dias AR, Martins AM, Piedade MM, Romão CC. Studies on molybdenocene derivatives: Reactions of [Cp2Mo(η2-NCMe)] and preparation of alkyl hydride complexes. Crystal structure of [Cp2Mo(PMe3)]. J Organomet Chem 1993. [DOI: 10.1016/0022-328x(93)80197-j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Calhorda MJ, Dias AR, Duarte M, Martins AM, Matias PM, Romão CC. Methylisocyanide derivatives of molybdenocene and tungstenocene: preparation, reactivity and electronic structure: crystal structures of [(η5-C5H5)2WBr(CNMe)]Br and [(η5-C5H5)2{N(H)CH3}][BF4]2· CH3CN. J Organomet Chem 1992. [DOI: 10.1016/0022-328x(92)83490-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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