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Karl J, Dahlmann M, Erker G, Bergander K. Arriving at an Experimental Estimate of the Intrinsic Activation Barrier of Olefin Insertion into the Zr−C Bond of an Active Metallocene Ziegler Catalyst. J Am Chem Soc 1998. [DOI: 10.1021/ja9743809] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jörn Karl
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Marc Dahlmann
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Gerhard Erker
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Klaus Bergander
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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Observation of the primary Zr–C insertion products in the reaction of the (butadiene)zirconocene/B(C6F5)3-betaine Ziegler catalyst system with reactive alkynes. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s1381-1169(97)00165-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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53
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Affiliation(s)
- Herbert Plenio
- Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany
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54
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Karl J, Erker G, Fröhlich R, Zippel F, Bickelhaupt F, Goedheijt MS, Akkerman OS, Binger P, Stannek J. Nichtkovalente Wechselwirkungen bei Organometallverbindungen: intramolekulare Metall-Kohlenstoff-Ionenpaarbildung bei Zirconium-Borat-Betainen. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971092429] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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55
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Bosch BE, Erker G, Fröhlich R, Meyer O. Internally Phosphine-Stabilized Zirconocene Cations Employing Substituted ((Diarylphosphino)methyl)cyclopentadienyl Ligand Systems. Organometallics 1997. [DOI: 10.1021/om970573t] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Boris E. Bosch
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Gerhard Erker
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Roland Fröhlich
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Oliver Meyer
- Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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Plenio H, Hermann J, Diodone R. The Coordination Chemistry of Fluorocarbons: Difluoro-m-cyclophane-Based Fluorocryptands and Their Group I and II Metal Ion Complexes. Inorg Chem 1997; 36:5722-5729. [PMID: 11670192 DOI: 10.1021/ic9708069] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reactions of 1,3-bis(bromomethyl)-2-fluorobenzene with the bis(trifluoroacetamides) of 1,3-bis(aminomethyl)-2-fluorobenzene and 1,3-bis(aminomethyl)benzene yield the respective 1+1-condensed [3.3]-m-cyclophanes, respectively termed F(2)-phane (yield 39%) and HF-phane (yield 48%) without trifluoroacetamide groups. The reactions of F(2)-phane with 1,8-diiodo-3,6-dioxaoctane and 1,11-diiodo-3,6,9-trioxaundecane result in the respective 1+1-addition products 1,10-diaza-25,26-difluoro-4,7-dioxatetracyclo[8.7.7.1(12,16).1(19,23)]hexaeicosa-12,14,16(25),19,21,23(26)-hexene (= F(2)-[2.1.1]-cryptand) (yield 5%) and 1,13-diaza-28,29-difluoro-4,7,10-trioxatetracyclo[11.7.7.1(15,19).1(22,26)]nonaeicosa-15,17,19(28),22,24,26(29)-hexene (= F(2)-[3.1.1]-cryptand) (yield 39%). Analogous reactions of the HF-phane give the related macrocycles HF-[2.1.1]-cryptand (yield 68%) and HF-[3.1.1]-cryptand (yield 76%). The coordination of alkali and alkaline earth metal ions by these fluorophane cryptands results in significant shifts of the (19)F NMR resonances: F(2)-[2.1.1]-cryptand, delta -100.70 ppm; its Li(+) complex, delta -129.23 ppm. The (1)J(CF) coupling constant for such complexes is correlated with the degree of interaction between CF units and metal ions, and the most pronounced decrease (262 Hz to 232 Hz) is found for the lithium complex of the F(2)-[2.1.1]-cryptand. Competition experiments show the difluoro F(2)-[3.1.1]-cryptand to form significantly stronger complexes with Na(+) than the monofluoro HF-[3.1.1]-cryptand. In the crystal structure of F(2)-[2.1.1]-cryptand.NaCF(3)SO(3), the sodium ion displays an unusual F(2)O(4)N coordination sphere with extremely short sodium-fluorine distances: CF.Na(+) = 229.8(3), 235.7(4) pm; O-Na(+) = 228.5(4), 242.0(4), 243.8(4), 247.6(4) pm; N-Na(+) = 285.1(7) pm. In the closely related crystal structure of HF-[3.1.1]-cryptand.NaClO(4), the metal has an FO(5)N coordination sphere: CF.Na(+) = 236.0(4) pm; O-Na(+) = 234.8(6), 239.3(6), 240.3(12), 240.6(6), 285.7(17) pm; N-Na(+) = 272.3(6) pm. In the crystal structure of F(2)-[3.1.1]-cryptand.HCF(3)SO(3), the proton is in a pseudotetrahedral environment: N-H = 84 pm; O.HN = (216 pm; CF.HN = 224, 236 pm. This, however, is not considered indicative of significant CF.HN hydrogen bonding.
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Affiliation(s)
- Herbert Plenio
- Institut für Anorganische und Analytische Chemie, Albertstr. 21, 79104 Freiburg, Germany
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57
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Enders M, Rudolph R, Pritzkow H. Chirale titan- und zirkoniumkomplexe mit dem 1-(8-Chinolyl)-2,3-dimethylcyclopentadienyl-Liganden. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(97)00503-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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58
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Karl J, Erker G, Fröhlich R. Internal Fluorocarbon Coordination as a Tool for the Protection of Active Catalytic Sites: Experimental Characterization of the Zr···F−C Interaction in the Group 4 Metallocene(butadiene)/B(C6F5)3 Betaine Ziegler Catalyst Systems. J Am Chem Soc 1997. [DOI: 10.1021/ja971720h] [Citation(s) in RCA: 104] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jörn Karl
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Gerhard Erker
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
| | - Roland Fröhlich
- Contribution from the Organisch-Chemisches Institut der Universität Münster, Corrensstrasse 40, D-48149 Münster, Germany
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59
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Schottek J, Erker G, Fröhlich R. Stabilisierung einesC2v-verzerrten Methanderivats in einem Organometallgerüst. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971092221] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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60
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Pindado GJ, Thornton-Pett M, Bouwkamp M, Meetsma A, Hessen B, Bochmann M. Zwitterionische Diallylzirconiumkomplexe: Synthese, Struktur, Polymerisationsaktivität und Desaktivierungsreaktionen. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971092125] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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61
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Ahlers W, Erker G, Fröhlich R, Zippel F. Characteristic Features of Neutral Cyclopropenylium-Like Compounds: Synthesis, Structure, and Chemical Behavior of a Cyclopropenylioborate Betaine. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/cber.19971300809] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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62
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Sun Y, Spence REVH, Piers WE, Parvez M, Yap GPA. Intramolecular Ion−Ion Interactions in Zwitterionic Metallocene Olefin Polymerization Catalysts Derived from “Tucked-In” Catalyst Precursors and the Highly Electrophilic Boranes XB(C6F5)2 (X = H, C6F5). J Am Chem Soc 1997. [DOI: 10.1021/ja970140h] [Citation(s) in RCA: 100] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yimin Sun
- Contribution from the Department of Chemistry, The University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada, NOVA Research & Technology Corp., 2928 16th Street N.E., Calgary, Alberta T2E 7K7, Canada, and Windsor Molecular Structure Center, Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Rupert E. v. H. Spence
- Contribution from the Department of Chemistry, The University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada, NOVA Research & Technology Corp., 2928 16th Street N.E., Calgary, Alberta T2E 7K7, Canada, and Windsor Molecular Structure Center, Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Warren E. Piers
- Contribution from the Department of Chemistry, The University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada, NOVA Research & Technology Corp., 2928 16th Street N.E., Calgary, Alberta T2E 7K7, Canada, and Windsor Molecular Structure Center, Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Masood Parvez
- Contribution from the Department of Chemistry, The University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada, NOVA Research & Technology Corp., 2928 16th Street N.E., Calgary, Alberta T2E 7K7, Canada, and Windsor Molecular Structure Center, Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Glenn P. A. Yap
- Contribution from the Department of Chemistry, The University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada, NOVA Research & Technology Corp., 2928 16th Street N.E., Calgary, Alberta T2E 7K7, Canada, and Windsor Molecular Structure Center, Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
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63
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Karl J, Erker G, Fröhlich R. Cp2*Zr(μ-C4H6)B(C6F5)3, a first example of a stable unbridged homogeneous metallocene—betaine Ziegler catalyst system. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(96)06931-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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64
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Deck PA, Fisher TS, Downey JS. Boron−Silicon Exchange Reactions of Boron Trihalides with Trimethylsilyl-Substituted Metallocenes. Organometallics 1997. [DOI: 10.1021/om961026v] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul A. Deck
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0121
| | - Travis S. Fisher
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0121
| | - J. Sloan Downey
- Department of Chemistry, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0121
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65
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Preparation of (Cp*) {C5Me4CH2B(C6F5)3}ZrPh, a novel zwitterionic single-component alkene polymerisation catalyst. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(97)00389-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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66
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Ahlers W, Temme B, Erker G, Fröhlich R, Fox T. Dynamic features of the zirconocene-boron-betaine complexes obtained by treatment of bis(alkynyl)zirconocenes with the tris(pentafluorophenyl) borane Lewis-acid. J Organomet Chem 1997. [DOI: 10.1016/s0022-328x(96)06610-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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