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Chilleck MA, Braun T, Braun B, Mebs S. Neutral and Cationic Zinc Complexes with N- and S-Donor-Functionalized Cyclopentadienyl Ligands. Organometallics 2014. [DOI: 10.1021/om401076g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maren A. Chilleck
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße
2, 12489 Berlin, Germany
| | - Thomas Braun
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße
2, 12489 Berlin, Germany
| | - Beatrice Braun
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße
2, 12489 Berlin, Germany
| | - Stefan Mebs
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße
2, 12489 Berlin, Germany
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2
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Carrasco M, Peloso R, Resa I, Rodríguez A, Sánchez L, Álvarez E, Maya C, Andreu R, Calvente JJ, Galindo A, Carmona E. Chemical reactivity and electrochemistry of metal-metal-bonded zincocenes. Inorg Chem 2011; 50:6361-71. [PMID: 21648450 DOI: 10.1021/ic200816f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Attempts to prepare mixed-ligand zinc-zinc-bonded compounds that contain bulky C(5)Me(5) and terphenyl groups, [Zn(2)(C(5)Me(5))(Ar')], lead to disproportionation. The resulting half-sandwich Zn(II) complexes [(η(5)-C(5)Me(5))ZnAr'] (Ar' = 2,6-(2,6-(i)Pr(2)C(6)H(3))(2)-C(6)H(3), 2; 2,6-(2,6-Me(2)C(6)H(3))(2)-C(6)H(3), 3) can also be obtained from the reaction of [Zn(C(5)Me(5))(2)] with the corresponding LiAr'. In the presence of pyr-py (4-pyrrolidinopyridine) or DBU (1,8-diazabicyclo[5.4.0]undec-7-ene), [Zn(2)(η(5)-C(5)Me(5))(2)] reacts with C(5)Me(5)OH to afford the tetrametallic complexes [Zn(2)(η(5)-C(5)Me(5))L(μ-OC(5)Me(5))](2) (L = pyr-py, 6; DBU, 8), respectively. The bulkier terphenyloxide Ar(Mes)O(-) group (Ar(Mes) = 2,6-(2,4,6-Me(3)C(6)H(2))(2)-C(6)H(3)) gives instead the dimetallic compound [Zn(2)(η(5)-C(5)Me(5))(OAr(Mes))(pyr-py)(2)], 7, that features a terminal Zn-OAr(Mes) bond. DFT calculations on models of 6-8 and also on the Zn-Zn-bonded complexes [Zn(2)(η(5)-C(5)H(5))(OC(5)H(5))(py)(2)] and [(η(5)-C(5)H(5))ZnZn(py)(3)](+) have been performed and reveal the nonsymmetric nature of the Zn-Zn bond with lower charge and higher participation of the s orbital of the zinc atom coordinated to the cyclopentadienyl ligand with respect to the metal within the pseudo-ZnL(3) fragment. Cyclic voltammetric studies on [Zn(2)(η(5)-C(5)Me(5))(2)] have been also carried out and the results compared with the behavior of [Zn(C(5)Me(5))(2)] and related magnesium and calcium metallocenes.
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Affiliation(s)
- Mario Carrasco
- Instituto de Investigaciones Químicas-Departamento de Química Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Avenida Américo Vespucio 49, 41092 Sevilla, Spain
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3
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Blake AJ, Lewis W, McMaster J, Moorhouse RS, Moxey GJ, Kays DL. Amido analogues of zincocenes and cadmocenes. Dalton Trans 2011; 40:1641-5. [DOI: 10.1039/c0dt01710h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Esqueda AC, Conejero S, Maya C, Carmona E. Synthesis of Rhodium Complexes with Bulky Substituted Cyclopentadienyl Ligands. H/D Exchange Reactions and Silane Activation. Organometallics 2010. [DOI: 10.1021/om100412q] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Ana Cristina Esqueda
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC and Universidad de Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | - Salvador Conejero
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC and Universidad de Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | - Celia Maya
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC and Universidad de Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC and Universidad de Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain
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Garcés A, Sánchez-Barba LF, Alonso-Moreno C, Fajardo M, Fernández-Baeza J, Otero A, Lara-Sánchez A, López-Solera I, Rodríguez AM. Hybrid Scorpionate/Cyclopentadienyl Magnesium and Zinc Complexes: Synthesis, Coordination Chemistry, and Ring-Opening Polymerization Studies on Cyclic Esters. Inorg Chem 2010; 49:2859-71. [DOI: 10.1021/ic902399r] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrés Garcés
- Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, Móstoles-28933-Madrid, Spain
| | - Luis F. Sánchez-Barba
- Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, Móstoles-28933-Madrid, Spain
| | - Carlos Alonso-Moreno
- Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, Móstoles-28933-Madrid, Spain
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Mariano Fajardo
- Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, Móstoles-28933-Madrid, Spain
| | - Juan Fernández-Baeza
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Antonio Otero
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Agustín Lara-Sánchez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Isabel López-Solera
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
| | - Ana María Rodríguez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071-Ciudad Real, Spain
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Zhou B, Denning MS, Chapman TAD, Goicoechea JM. Coupling Reactions of Functionalized Zintl Ions [E9Cd(C6H5)]3− (E = Sn, Pb) with Tributyltinhydride: Synthesis and Isolation of {Sn9CdSn[(CH2)3CH3]3}3−. Inorg Chem 2009; 48:2899-907. [DOI: 10.1021/ic8022826] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Binbin Zhou
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Mark S. Denning
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Thomas A. D. Chapman
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Jose M. Goicoechea
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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7
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Esqueda AC, Conejero S, Maya C, Carmona E. Zincocenes as Mild Cyclopentadienyl Transfer Reagents toward Rhodium(I) Olefin Precursors. Facile Synthesis of (η5-Cp′)Rh(olefin)2 Compounds. Organometallics 2008. [DOI: 10.1021/om801046d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ana Cristina Esqueda
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC, and Universidad de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Salvador Conejero
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC, and Universidad de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Celia Maya
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC, and Universidad de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, CSIC, and Universidad de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
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Fernández R, Grirrane A, Resa I, Rodríguez A, Carmona E, Álvarez E, Gutiérrez-Puebla E, Monge Á, López del Amo J, Limbach HH, Lledós A, Maseras F, del Río D. Structural Analysis of Zincocenes with Substituted Cyclopentadienyl Rings. Chemistry 2008; 15:924-35. [DOI: 10.1002/chem.200801917] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Lopez del Amo JM, Buntkowsky G, Limbach HH, Resa I, Fernandez R, Carmona E. Low-temperature NMR studies of Zn tautomerism and hindered rotations in solid zincocene derivatives. J Phys Chem A 2008; 112:3557-65. [PMID: 18366198 DOI: 10.1021/jp711504g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using a combination of NMR methods we have detected and studied fluxional motions in the slip-sandwich structure of solid decamethylzincocene (I, [(eta5-C5Me5)Zn(eta1-C5Me5)]). For comparison, we have also studied the solid iminoacyl derivative [(eta5-C5Me5)Zn(eta1-C(NXyl)C5Me5)] (II). The variable temperature 13C CPMAS NMR spectra of I indicate fast rotations of both Cp* rings in the molecule down to 156 K as well as the presence of an order-disorder phase transition around 210 K. The disorder is shown to be dynamic arising from a fast combined Zn tautomerism and eta1/eta5 reorganization of the Cp* rings between two degenerate states A and B related by a molecular inversion. In the ordered phase, the degeneracy of A and B is lifted; that is, the two rings X and Y are inequivalent, where X exhibits a larger fraction of time in the eta5 state than Y. However, the interconversion is still fast and characterized by a reaction enthalpy of DeltaH = 2.4 kJ mol-1 and a reaction entropy of DeltaS = 4.9 J K-1 mol-1. In order to obtain quantitative kinetic information, variable temperature 2H NMR experiments were performed on static samples of I-d6 and II-d6 between 300 and 100 K, where in each ring one CH3 is replaced by one CD3 group. For II-d6, the 2H NMR line shapes indicate fast CD3 group rotations and a fast "eta5 rotation", corresponding to 72 degrees rotational jumps of the eta5 coordinated Cp* ring. The latter motion becomes slow around 130 K. By line shape analysis, an activation energy of the eta5 rotation of about 21 kJ mol-1 was obtained. 2H NMR line shapes analysis of I-d6 indicates fast CD3 group rotations at all temperatures. Moreover, between 100 and 150 K, a transition from the slow to the fast exchange regime is observed for the 5-fold rotational jumps of both Cp* rings, exhibiting an activation energy of 18 kJ mol-1. This value was corroborated by 2H NMR relaxometry from which additionally the activation energies 6.3 kJ mol-1 and 11.2 kJ mol-1 for the CD3 rotation and the molecular inversion process were determined.
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Affiliation(s)
- Juan Miguel Lopez del Amo
- Institut für Chemie und Biochemie der Freien Universität Berlin, Takustrasse 3, D-14195, Berlin, Germany.
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11
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Wang H, Kehr G, Fröhlich R, Erker G. Ein 1,8-Naphthylen-verbrücktes Bis(indenyl)zink-THF-Addukt: Synthese und Struktur eines Ansa-Zinkocen-Derivates. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200605069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Wang H, Kehr G, Fröhlich R, Erker G. A 1,8-Naphthylene-Bridged Bis(indenyl)zinc THF Adduct: Formation and Structure of an ansa-Zincocene Derivative. Angew Chem Int Ed Engl 2007; 46:4905-8. [PMID: 17516594 DOI: 10.1002/anie.200605069] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Huadong Wang
- Organisch-Chemisches Institut, Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
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13
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Ly HV, Forster TD, Parvez M, McDonald R, Roesler R. Zinc, Cadmium, and Mercury Metallocenes Incorporating 1,2-Diaza-3,5-diborolyl Ligands. Organometallics 2007. [DOI: 10.1021/om070230n] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hanh V. Ly
- Departments of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4, and University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Taryn D. Forster
- Departments of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4, and University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Masood Parvez
- Departments of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4, and University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Robert McDonald
- Departments of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4, and University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Roland Roesler
- Departments of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4, and University of Alberta, Edmonton, Alberta, Canada T6G 2G2
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14
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Grirrane A, Resa I, Rodriguez A, Carmona E, Alvarez E, Gutierrez-Puebla E, Monge A, Galindo A, del Río D, Andersen RA. Zinc-zinc bonded zincocene structures. Synthesis and characterization of Zn2(eta5-C5Me5)2 and Zn2(eta5-C5Me4Et)2. J Am Chem Soc 2007; 129:693-703. [PMID: 17227033 DOI: 10.1021/ja0668217] [Citation(s) in RCA: 155] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While, in general, decamethylzincocene, Zn(C5Me5)2, and other zincocenes, Zn(C5Me4R)2 (R = H, But, SiMe3), react with dialkyl and diaryl derivatives, ZnR'2, to give the half-sandwich compounds (eta5-C5Me4R)ZnR', under certain conditions the reactions of Zn(C5Me5)2 with ZnEt2 or ZnPh2 produce unexpectedly the dizincocene Zn2(eta5-C5Me5)2 (1) in low yields, most likely as a result of the coupling of two (eta5-C5Me5)Zn* radicals. An improved, large scale (ca. 2 g) synthesis of 1 has been achieved by reduction of equimolar mixtures of Zn(C5Me5)2 and ZnCl2 with KH in tetrahydrofuran. The analogous reduction of Zn(C5Me4R)2 (R = H, SiMe3, But) yields only decomposition products, but the isotopically labeled dimetallocene 68Zn2(eta5-C5Me5)2 and the related compound Zn2(eta5-C5Me4Et)2 (2) have been obtained by this procedure. Compound 2 has lower thermal stability than 1, but it has been unequivocally characterized by low-temperature X-ray diffraction studies. As for 1 a combination of structural characterization techniques has provided unambiguous evidence for its formulation as the Zn-Zn bonded dimer Zn2(eta5-C5Me4Et)2, with a short Zn-Zn bond of 2.295(3) A indicative of a strong Zn-Zn bonding interaction. The electronic structure and the bonding properties of 1 and those of related dizincocenes Zn2(eta5-Cp')2 have been studied by DFT methods (B3LYP level), with computed bond distances and angles for dizincocene 1 very similar to the experimental values. The Zn-Zn bond is strong (ca. 62 kcal.mol-1 for 1) and resides in the HOMO-4, that has a contribution of Zn orbitals close to 60%, consisting mostly of the Zn 4s orbitals (more than 96%).
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Affiliation(s)
- Abdessamad Grirrane
- Instituto de Investigaciones Químicas-Departamento de Química InorgAnica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Américo Vespucio 49, 41092 Sevilla, Spain
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15
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Grirrane A, Resa I, del Río D, Rodríguez A, Alvarez E, Mereiter K, Carmona E. Solid-State Structures and Solution Studies of Novel Cyclopentadienyl Mercury Compounds. Inorg Chem 2007; 46:4667-76. [PMID: 17461576 DOI: 10.1021/ic0624672] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
New mercury cyclopentadienyl complexes Hg(eta1-Cp')Cl have been prepared by the reaction of HgCl2 and the appropriate KCp' salts or by the transmetalation of HgCl2 with ZnCp'2 (Cp'=C5Me4H, 1; C5Me4But, 2; C5Me4SiMe3, 3; C5H4SiMe3, 4). By contrast, only the SiMe3-substituted bis(cyclopentadienyl) derivatives, Hg(C5Me4SiMe3)2 (5) and Hg(C5H4SiMe3)2 (6), can be isolated by the above synthetic procedures and the appropriate ratio of reagents or from HgCp'Cl and KCp'. Solution NMR studies reveal nonfluxional behavior of the SiMe3-substituted complexes 3, 5, and 6. X-ray studies of the solid-state structures show that the six compounds contain eta1-Cp' ligands, with linear or almost linear C-Hg-Cl or C-Hg-C coordination environments. The two HgCp'2 compounds, 5 and 6, have the expected insular structures, but the HgCp'Cl derivatives show supramolecular associations by means of weak secondary Hg...Cl interactions. Thus, the HgCp'Cl compounds 1, 3, and 4 form three different polymeric chain structures with typically two Hg...Cl interactions of 3.04-3.46 A per mercury. By contrast, 2 forms a tetramer, [Hg(C5Me4SiMe3)Cl]4, with a cubelike arrangement of four Hg and four Cl atoms. Density functional theory has been used to investigate the electronic structure of the compounds.
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Affiliation(s)
- Abdessamad Grirrane
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Américo Vespucio s/n, 41092 Sevilla, Spain
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Wang ZX, Qi CY. Lithium, Magnesium, and Zinc Iminophosphorano(8-quinolyl)methanide Complexes: Syntheses, Characterization, and Activity in ε-Caprolactone Polymerization. Organometallics 2007. [DOI: 10.1021/om0610400] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhong-Xia Wang
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Chun-Yan Qi
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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17
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Bentz D, Wolmershäuser G, Sitzmann H. Bis(alkylcyclopentadienyl)cadmium Complexes and Alkylcyclopentadienyl(mesityl)cadmium: Synthesis and Structure. Organometallics 2006. [DOI: 10.1021/om0510021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dirk Bentz
- Fachbereich Chemie der TU Kaiserslautern, Erwin-Schrödinger-Strasse, 67663 Kaiserslautern, Germany
| | - Gotthelf Wolmershäuser
- Fachbereich Chemie der TU Kaiserslautern, Erwin-Schrödinger-Strasse, 67663 Kaiserslautern, Germany
| | - Helmut Sitzmann
- Fachbereich Chemie der TU Kaiserslautern, Erwin-Schrödinger-Strasse, 67663 Kaiserslautern, Germany
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del Río D, Galindo A, Resa I, Carmona E. Theoretical and Synthetic Studies on [Zn2(η5-C5Me5)2]: Analysis of the ZnZn Bonding Interaction. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200462175] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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del Río D, Galindo A, Resa I, Carmona E. Theoretical and Synthetic Studies on [Zn2(η5-C5Me5)2]: Analysis of the ZnZn Bonding Interaction. Angew Chem Int Ed Engl 2005; 44:1244-7. [PMID: 15662655 DOI: 10.1002/anie.200462175] [Citation(s) in RCA: 129] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Diego del Río
- Instituto de Investigaciones Químicas, Departamento de Química Inorgánica, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Américo Vespucio 49, Isla de la Cartuja, 41092 Seville, Spain.
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Ly HV, Forster TD, Maley D, Parvez M, Roesler R. µ-η3:η4-Lithiocene and η3:η3-zincocene incorporating 1,2-diaza-3,5-diborolyl, a cyclopentadienyl analog. Chem Commun (Camb) 2005:4468-70. [PMID: 16136253 DOI: 10.1039/b508152a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A heterocyclic cyclopentadienyl analog containing only one carbon atom in the ring was prepared and a polymeric lithiocene and a monomeric zincocene containing this novel ligand have been isolated and crystallographically characterized.
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Affiliation(s)
- Hanh V Ly
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2L 1M8
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Haaland A, Samdal S, Tverdova NV, Girichev GV, Giricheva NI, Shlykov SA, Garkusha OG, Lokshin BV. The molecular structure of dicyclopentadienylzinc (zincocene) determined by gas electron diffraction and density functional theory calculations: η5,η5, η3,η3 or η5,η1 coordination of the ligand rings? J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(03)00770-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Budzelaar PHM, Engelberts JJ, van Lenthe JH. Trends in Cyclopentadienyl−Main-Group-Metal Bonding. Organometallics 2003. [DOI: 10.1021/om020928v] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peter H. M. Budzelaar
- Department of Inorganic Chemistry, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands
| | - Jeroen J. Engelberts
- Theoretical Chemistry Group, Debye Institute, Utrecht University, Padualaan 14, 3584 CH Utrecht, The Netherlands
| | - Joop H. van Lenthe
- Theoretical Chemistry Group, Debye Institute, Utrecht University, Padualaan 14, 3584 CH Utrecht, The Netherlands
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Walker DA, Woodman TJ, Schormann M, Hughes DL, Bochmann M. Synthesis, Structures, and Ring-Opening Polymerization Reactions of Substituted Cyclopentadienyl Complexes of Zinc. Organometallics 2003. [DOI: 10.1021/om020690a] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dennis A. Walker
- Wolfson Materials and Catalysis Centre, School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K
| | - Timothy J. Woodman
- Wolfson Materials and Catalysis Centre, School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K
| | - Mark Schormann
- Wolfson Materials and Catalysis Centre, School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K
| | - David L. Hughes
- Wolfson Materials and Catalysis Centre, School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K
| | - Manfred Bochmann
- Wolfson Materials and Catalysis Centre, School of Chemical Sciences, University of East Anglia, Norwich, NR4 7TJ, U.K
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24
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Fernández R, Resa I, del Río D, Carmona E, Gutiérrez-Puebla E, Monge Á. Synthesis and Solid-State Structure of Zn(η5-C5Me4SiMe3)(η1-C5Me4SiMe3), a Zincocene with Nonparallel Cyclopentadienyl Rings. Organometallics 2003. [DOI: 10.1021/om021018g] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Abstract
The isomeric S-methyldihydropyrrins 9-Z and 9-E exhibit markedly different behavior in Pd(0)-catalyzed cross-coupling reactions. Thioimidates 9-Z are readily converted to imines 10-Z employing Pd(0)/AlkZnI. Under identical conditions 9-E are inert. Oxidative addition to Pd(0) requires activation by Zn or other Lewis acids, which is sterically unfavorable with 9-E. Analogous results were obtained with the related thioimidates 11-E,Z as well as with methylthiopyridines 19alpha-gamma. In the case of both 11 and 19 oxidative addition to Pd(0) was greatly facilitated in the presence of BF(3) x Et(2)O. The importance of Lewis acid activation to Pd(0) oxidative addition in such substrates appears to be a general phenomenon not previously recognized.
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Affiliation(s)
- Indranath Ghosh
- Burke Chemical Laboratory, Dartmouth College, Hanover, New Hampshire 03755, USA
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26
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Conejo MM, Fernández R, del Río D, Carmona E, Monge A, Ruiz C. Synthesis and structural characterization of Be(eta 5-C5Me5)(eta 1-C5Me4H). Evidence for ring-inversion leading to Be(eta 5-C5Me4H)(eta 1-C5Me5). Chem Commun (Camb) 2002:2916-7. [PMID: 12478811 DOI: 10.1039/b208972f] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mixed-ring beryllocene Be(C5Me5)(C5Me4H), that contains eta 5-C5Me5 and eta 1-C5Me4H rings, the latter bonded to the metal through the CH carbon atom (X-ray crystal structure) reacts at room temperature with CNXyl (Xyl = C6H3-2,6-Me2) to give an iminoacyl product, Be(eta 5-C5Me4H)[C(NXyl)C5Me5] derived from the inverted beryllocene structure Be (eta 5-C5Me4H)(eta 1-C5Me5).
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Affiliation(s)
- M M Conejo
- Departamento de Química Inorgánica-Instituto de Investigaciones Químicas, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, c/Américo Vespucio s/n, Isla de la Cartuja, 41092 Sevilla, Spain
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27
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Darensbourg DJ, Wildeson JR, Yarbrough JC. Synthesis and Structures of (Dialkylamino)ethylcyclopentadienyl Derivatives of Zinc. Organometallics 2001. [DOI: 10.1021/om010519j] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Donald J. Darensbourg
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843
| | - Jacob R. Wildeson
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843
| | - Jason C. Yarbrough
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843
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28
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Sapunov VN, Kirchner K, Schmid R. Revisiting the main group cyclopentadienyl metal complexes in terms of the through-space coupling concept. Coord Chem Rev 2001. [DOI: 10.1016/s0010-8545(00)00390-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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29
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Thornberry MP, Slebodnick C, Deck PA, Fronczek FR. Structural and Electronic Effects of Pentafluorophenyl Substituents on Cyclopentadienyl Complexes of Fe, Co, Mn, and Re1. Organometallics 2000. [DOI: 10.1021/om000798v] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Carla Slebodnick
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061-0212
| | - Paul A. Deck
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061-0212
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804
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30
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Overby JS, Jayaratne KC, Schoell NJ, Hanusa TP. Unexpected Competition between Vanadium and Zinc in the Synthesis of Sterically Bulky Metallocenes. Organometallics 1999. [DOI: 10.1021/om980691w] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jason S. Overby
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | | | - Nathan J. Schoell
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
| | - Timothy P. Hanusa
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235
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31
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Hays ML, Burkey DJ, Overby JS, Hanusa TP, Sellers SP, Yee GT, Young VG. Steric Influence on the Structure, Magnetic Properties, and Reactivity of Hexa- and Octaisopropylmanganocene. Organometallics 1998. [DOI: 10.1021/om980596n] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Melanie L. Hays
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309, and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - David J. Burkey
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309, and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Jason S. Overby
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309, and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Timothy P. Hanusa
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309, and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Scott P. Sellers
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309, and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Gordon T. Yee
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309, and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
| | - Victor G. Young
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309, and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455
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32
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Overby JS, Schoell NJ, Hanusa TP. Synthesis and characterization of chromocenes containing bulky cyclopentadienyl ligands. J Organomet Chem 1998. [DOI: 10.1016/s0022-328x(98)00485-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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33
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Burkey DJ, Hays ML, Duderstadt RE, Hanusa TP. Synthesis, Structures, and Properties of “Encapsulated” Iron and Cobalt Metallocenes with Highly Isopropylated Cyclopentadienyl Rings. Organometallics 1997. [DOI: 10.1021/om960740+] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Fisher JD, Budzelaar PHM, Shapiro PJ, Staples RJ, Yap GPA, Rheingold AL. Regarding the Structures and Fluxionality of Tricyclopentadienylaluminum Compounds. Organometallics 1997. [DOI: 10.1021/om9610049] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- James D. Fisher
- Departments of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, and University of Delaware, Newark, Delaware 19716, and Department of Inorganic Chemistry, University of Nijmegen, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands
| | - Peter H. M. Budzelaar
- Departments of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, and University of Delaware, Newark, Delaware 19716, and Department of Inorganic Chemistry, University of Nijmegen, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands
| | - Pamela J. Shapiro
- Departments of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, and University of Delaware, Newark, Delaware 19716, and Department of Inorganic Chemistry, University of Nijmegen, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands
| | - Richard J. Staples
- Departments of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, and University of Delaware, Newark, Delaware 19716, and Department of Inorganic Chemistry, University of Nijmegen, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands
| | - Glenn P. A. Yap
- Departments of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, and University of Delaware, Newark, Delaware 19716, and Department of Inorganic Chemistry, University of Nijmegen, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands
| | - Arnold L. Rheingold
- Departments of Chemistry, University of Idaho, Moscow, Idaho 83844-2343, and University of Delaware, Newark, Delaware 19716, and Department of Inorganic Chemistry, University of Nijmegen, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands
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35
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Substituent Effects as Probes of Structure and Bonding in Mononuclear Metallocenes. ADVANCES IN ORGANOMETALLIC CHEMISTRY 1996. [DOI: 10.1016/s0065-3055(08)60533-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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