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Kulsha AV, Sharapa DI. Superhalogen and Superacid. J Comput Chem 2019; 40:2293-2300. [PMID: 31254480 DOI: 10.1002/jcc.26007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 05/25/2019] [Accepted: 05/30/2019] [Indexed: 11/10/2022]
Abstract
A superhalogen F@C20 (CN)20 and a corresponding Brønsted superacid were designed and investigated on DFT and DLPNO-CCSD(T) levels of theory. Calculated compounds have outstanding electron affinity and deprotonation energy, respectively. We consider superacid H[F@C20 (CN)20 ] to be able to protonate molecular nitrogen. The stability of these structures is discussed, while some of the previous predictions concerning neutral Brønsted superacids of record strength are doubted. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Andrey V Kulsha
- Lyceum of Belarusian State University, 8 Ulijanauskaja Str., Minsk, 220030, Belarus
| | - Dmitry I Sharapa
- Chair of Theoretical Chemistry and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universitat Erlangen-Nürnberg, Egerlandstraße 3, 91058, Erlangen, Germany.,Institute of Catalysis Research and Technology (IKFT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, D-76344, Germany
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Khan FA, Rao CN. Synthesis of 9-oxa-noradamantane derivative, an aesthetically pleasing ‘oxa-basket’. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.07.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Wahl F, Weiler A, Landenberger P, Sackers E, Voss T, Haas A, Lieb M, Hunkler D, Wörth J, Knothe L, Prinzbach H. Towards Perfunctionalized Dodecahedranes—En Route to C20 Fullerene. Chemistry 2006; 12:6255-67. [PMID: 16807931 DOI: 10.1002/chem.200501618] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
"One-pot" substitution of the twenty hydrogen atoms in pentagonal dodecahedrane (C(20)H(20)) by OH, F, Cl, and Br atoms is explored. Electrophilic insertion of oxygen atoms with DMDO and TFMDO as oxidizing reagents ended, far off the desired C(20)(OH)(20), in complex polyol mixtures (up to C(20)H(10)(OH)(10) decols, a trace of C(20)H(OH)(19)?). Perfluorination was successful in a NaF matrix but (nearly pure) C(20)F(20) could be secured only in very low yield. "Brute-force" photochlorination (heat, light, pressure, time) provided a mixture of hydrogen-free, barely soluble C(20)Cl(16) dienes in high yield and C(20)Cl(20) as a trace component. Upon electron-impact ionization of the C(20)Cl(16) material sequential loss of the chlorine atoms was the major fragmentation pathway furnishing, however, only minor amounts of chlorine-free C(20) (+) ions. "Brute-force" photobrominations delivered an extremely complex mixture of polybromides with C(20)HBr(13) trienes as the highest masses. The MS spectra exhibited exclusive loss of the Br substituents ending in rather intense singly, doubly, and triply charged C(20)H(4-0) (+(2+)(3+)) ions. The insoluble approximately C(20)HBr(13) fraction (C(20)Br(14) trienes as highest masses) obtained along a modified bromination protocol, ultimately allowed the neat mass selection of C(20) (-) ions. The C(20)Cl(16) dienes and C(20)H(0-3)Br(14-12) tri-/tetraenes, in spite of their very high olefinic pyramidalization, proved resistant to oxygen and dimerization (polymerization) but added CH(2)N(2) smoothly. Dehalogenation of the respective cycloaddition products through electron-impact ionization resulted in C(22-24)H(4-8) (+(2+)) ions possibly constituting bis-/tris-/tetrakis-methano-C(20) fullerenes or partly hydrogenated C(22), C(23), and C(24) cages.
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Affiliation(s)
- Fabian Wahl
- Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, 79104 Freiburg, Germany
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Sackers E, Osswald T, Weber K, Keller M, Hunkler D, Wörth J, Knothe L, Prinzbach H. Bromination of Unsaturated Dodecahedranes—En Route to C20 Fullerene. Chemistry 2006; 12:6242-54. [PMID: 16927320 DOI: 10.1002/chem.200501609] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
As part of a study to achieve selective oligo(poly)bromination-ultimately perbromination-of the dodecahedral C(20) skeleton, the extent and direction of the ionic bromination of dodecahedrene and 1,16-dodecahedradiene were explored. Along sequences of Br(+) additions/deprotonations and allylic rearrangements, up to ten hydrogen atoms were substituted (traces of C(20)H(x)Br(10)). Tetrabromododecahedrenes obtained under defined conditions in up to 50 % total yield with three and four allylic bromine substituents protecting the extremely bent C==C bonds, proved highly unreactive even towards oxygen but reacted rapidly with CH(2)N(2). Upon electron impact ionization (MS) of the newly secured oligo(poly)bromododecahedra(e)nes, sequential loss of the substituents ended generally in polyunsaturated dodecahedranes (in the extreme C(20)H(4), "tetrahydro-C(20) fullerenes"). Only subsequently did skeletal fragmentations occur. From X-ray crystal-structure analyses, more information was obtained on the structural response of the dodecahedral skeleton to the strain induced by the voluminous substituents. As Appendix, the forcing radical bromination of 1,6-dibromododecahedrane and exploratory cis-beta-HBr/cis-beta-Br(2) eliminations in bromododecahedranes with [Fe(2)(CO)(9)], P(2)F/[FeCp(2)] and [Fe(tmeda)Cp*Cl] (in situ protection) are presented.
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Affiliation(s)
- Emmerich Sackers
- Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, 79104 Freiburg, Germany
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Prinzbach H, Wahl F, Weiler A, Landenberger P, Wörth J, Scott LT, Gelmont M, Olevano D, Sommer F, von Issendorff B. C20 Carbon Clusters: Fullerene–Boat–Sheet Generation, Mass Selection, Photoelectron Characterization. Chemistry 2006; 12:6268-80. [PMID: 16823785 DOI: 10.1002/chem.200501611] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Electron-impact ionization in a time-of-flight mass spectrometer of C(20)H(0-3)Br(14-12) probes-secured from C(20)H(20) dodecahedrane by a "brute-force" bromination protocol-provided bromine-free C(20)H(0-2(3)) anions in amounts that allowed the clean mass-separation of the hydrogen-free C(20) (-) ions and the photoelectron (PE) spectroscopic characterization as C(20) fullerene (electron affinity (EA)=2.25+/-0.03 eV, vibrational progressions of 730+/-70). The extremely strained C(20) fullerene ions surfaced as kinetically rather stable entities (lifetime of at least the total flight time of 0.4 ms); they only very sluggishly expel a C(2) unit. The HOMO and LUMO are suggested to be almost degenerate (DeltaE=0.27 eV). The assignment as a fullerene was corroborated by the PE characterization of the C(20) bowl (EA=2.17+/-0.03 eV, vibrational progression of 2060+/-50 cm(-1)) analogously generated from C(20)H(10) corannulene (C(20)H(1-3)Br(9-8) samples) and comparably stable. Highly resolved low-temperature PE spectra of the known C(20) ring (EA=2.49+/-0.03 eV, vibrational progressions 2022+/-45 and 455+/-30 cm(-1)), obtained from graphite, display an admixture of, most probably, a bicyclic isomer (EA=3.40+/-0.03 eV, vibrational progression 455+/-30 cm(-1)). The C(20) (+(-)) and C(20)H(2) (+(-)) cluster ions generated from polybrominated perylene (C(20)H(0-2)Br(12-10)) have (most probably) retained the planar perylene-type skeleton (sheet, EA=2.47+/-0.03 eV, vibrational progressions of 2089+/-30 and 492+/-30 cm(-1) and EA=2.18+/-0.03 eV, vibrational progressions of 2105+/-30 and 468+/-30 cm(-1)).
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Affiliation(s)
- Horst Prinzbach
- Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, 79104 Freiburg, Germany.
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Schwesinger R, Link R, Wenzl P, Kossek S. Anhydrous Phosphazenium Fluorides as Sources for Extremely Reactive Fluoride Ions in Solution. Chemistry 2006; 12:438-45. [PMID: 16196062 DOI: 10.1002/chem.200500838] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Several peralkylated polyaminophosphazenium cations were evaluated for the generation of novel anhydrous F- salts. Two of them have been characterized by X-ray analysis and are particularly soluble, even in apolar aprotic solvents like benzene or THF, one of them even at -30 degrees C. Such solutions probably represent the most basic metal-free and stable media known to date. Comparison of these fluorides with known F- sources demonstrates that they are of unprecedented reactivity and selectivity in E2 elimination reactions.
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Affiliation(s)
- Reinhard Schwesinger
- Chemisches Laboratorium, Institut für Organische Chemie und Biochemie der Universität, Freiburg, Albertstrasse 21, 79104 Freiburg, Germany.
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Functionalized aromatics aligned with the three Cartesian axes: Extension of centropolyindane chemistry. PURE APPL CHEM 2006. [DOI: 10.1351/pac200678040749] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The unique geometrical features and structural potential of the centropolyindanes, a complete family of novel, 3D polycyclic aromatic hydrocarbons, are discussed with respect to the inherent orthogonality of their arene units. Thus, the largest member of the family, centrohexaindane, a topologically nonplanar hydrocarbon, is presented as a "Cartesian hexabenzene", because each of its six benzene units is stretched into one of the six directions of the Cartesian space. This feature is discussed on the basis of the X-ray crystal structures of centrohexaindane and two lower members of the centropolyindane family, viz. the parent tribenzotriquinacenes. Recent progress in multiple functionalization and extension of the indane wings of selected centropolyindanes is reported, including several highly efficient six- and eight-fold C-C cross-coupling reactions. Some particular centropolyindane derivatives are presented, such as the first twelve-fold functionalized centrohexaindane and a tribenzotriquinacene bearing three mutually orthogonal phenanthroline groupings at its molecular periphery. Challenges to further extend the arene peripheries of the tribenzotriquinacenes and fenestrindanes to give, eventually, graphite cuttings bearing a central bowl- or saddle-shaped center are outlined, as is the hypothetical generation of a "giant" nanocube consisting of eight covalently bound tribenzotriquinacene units. Along these lines, our recent discovery of a related, solid-state supramolecular cube, containing eight molecules of a particular tribromotrinitrotribenzotriquinacene of the same absolute configuration, is presented for the first time.
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Lu X, Chen Z. Curved pi-conjugation, aromaticity, and the related chemistry of small fullerenes (< C60) and single-walled carbon nanotubes. Chem Rev 2005; 105:3643-96. [PMID: 16218563 DOI: 10.1021/cr030093d] [Citation(s) in RCA: 461] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xin Lu
- State Key Laboratory of Physical Chemistry of Solid Surfaces & Center for Theoretical Chemistry, Department of Chemistry, Xiamen University, Xiamen 361005, China.
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Hudson BS, Allis DG, Parker SF, Ramirez-Cuesta AJ, Herman H, Prinzbach H. Infrared, Raman, and Inelastic Neutron Scattering Spectra of Dodecahedrane: an Ih Molecule in Th Site Symmetry. J Phys Chem A 2005; 109:3418-24. [PMID: 16833678 DOI: 10.1021/jp0503213] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Raman spectrum of crystalline dodecahedrane, C20H20, a species of nominal I(h) symmetry, exhibits splitting of the H(g) Raman active modes. The Raman inactive gerade vibrations of G(g), T(1g), and T(2g) symmetry are found to have weak Raman activity. The IR forbidden vibrations of T(2u), G(u), and H(u) type have moderate IR activity. All of this is consistent with the T(h) site symmetry. A treatment of the structure and vibrations of dodecahedrane using a periodic lattice DFT method results in a slightly distorted T(h) structure with six C-C bonds that are 0.001 A longer than the other 24. The vibrational spectrum computed for this structure exhibits splittings of the H(g) modes that are consistent with the observed spectra, but the computed splittings are larger than observed in room-temperature data. A complex pattern observed in the C-H stretching region is assigned. The inelastic neutron scattering spectrum calculated from the computed normal modes for the T(h) molecule in the lattice agrees quantitatively with experiment when overtone and combination transitions are included and allowance is made for anharmonicity of the C-H stretch motion. Finally, it is argued that the existing crystallographic determination of the average C-C bond length of 1.544 A is shortened by disorder and should be revised upward to agree with the computed value of 1.558 A.
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Affiliation(s)
- Bruce S Hudson
- Department of Chemistry, Syracuse University, Syracuse, New York 13244-4100, USA.
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Chen Z, Jiao H, Moran D, Hirsch A, Thiel W, Schleyer PVR. Structures and Stabilities of Endo- and Exohedral Dodecahedrane Complexes (X@C20H20 and XC20H20, X = H+, H, N, P, C-, Si-, O+, S+). J Phys Chem A 2003. [DOI: 10.1021/jp0273631] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhongfang Chen
- Institut für Organische Chemie, Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Computational Chemistry Annex, University of Georgia, Athens, Georgia 30602-2525, Department of Chemistry, Shanxi Normal University, 041004 Linfen, P. R. China, Leibniz-Institut für Organische Katalyse an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany, and Max-Planck-Institut für Kohlenforschung, 45466 Mülheim an der Ruhr, Germany
| | - Haijun Jiao
- Institut für Organische Chemie, Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Computational Chemistry Annex, University of Georgia, Athens, Georgia 30602-2525, Department of Chemistry, Shanxi Normal University, 041004 Linfen, P. R. China, Leibniz-Institut für Organische Katalyse an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany, and Max-Planck-Institut für Kohlenforschung, 45466 Mülheim an der Ruhr, Germany
| | - Damian Moran
- Institut für Organische Chemie, Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Computational Chemistry Annex, University of Georgia, Athens, Georgia 30602-2525, Department of Chemistry, Shanxi Normal University, 041004 Linfen, P. R. China, Leibniz-Institut für Organische Katalyse an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany, and Max-Planck-Institut für Kohlenforschung, 45466 Mülheim an der Ruhr, Germany
| | - Andreas Hirsch
- Institut für Organische Chemie, Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Computational Chemistry Annex, University of Georgia, Athens, Georgia 30602-2525, Department of Chemistry, Shanxi Normal University, 041004 Linfen, P. R. China, Leibniz-Institut für Organische Katalyse an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany, and Max-Planck-Institut für Kohlenforschung, 45466 Mülheim an der Ruhr, Germany
| | - Walter Thiel
- Institut für Organische Chemie, Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Computational Chemistry Annex, University of Georgia, Athens, Georgia 30602-2525, Department of Chemistry, Shanxi Normal University, 041004 Linfen, P. R. China, Leibniz-Institut für Organische Katalyse an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany, and Max-Planck-Institut für Kohlenforschung, 45466 Mülheim an der Ruhr, Germany
| | - Paul von Ragué Schleyer
- Institut für Organische Chemie, Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Computational Chemistry Annex, University of Georgia, Athens, Georgia 30602-2525, Department of Chemistry, Shanxi Normal University, 041004 Linfen, P. R. China, Leibniz-Institut für Organische Katalyse an der Universität Rostock e.V., Buchbinderstrasse 5-6, 18055 Rostock, Germany, and Max-Planck-Institut für Kohlenforschung, 45466 Mülheim an der Ruhr, Germany
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Reinbold J, Sackers E, Osswald T, Weber K, Weiler A, Voss T, Hunkler D, Wörth J, Knothe L, Sommer F, Morgner N, von IB, Prinzbach H. Unsaturated dodecahedranes--in quest of the C20H14 1,4,16-triene and C20H12 1,4,10(14),16-tetraene, and their cations and anions. Chemistry 2002; 8:509-24. [PMID: 11843163 DOI: 10.1002/1521-3765(20020118)8:2<509::aid-chem509>3.0.co;2-d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The highly pyramidal, highly strained 1,4,16-dodecahedratriene (4) and C20H12 1,4,10(14),16-dodecahedratetraene (5) are cage olefins with an intriguing "inner life". For 5 DFT calculations give information about the energetic and geometrical consequences of one-/two-electron oxidation and reduction. Attempts to prepare 4 and 5 through thermal retro[2+2]/[4+2]cycloaddition strategies proved unsuccessful. Still, the C20H14/C20H12 cage cations and anions are liberated upon electron impact or gas-discharge ionization of their thermally extremely stable tris-/tetrakisanthraceno-anellated derivatives. Mass-selection (photoelectron (PE) characterization) of the anions failed, however, due to the very small anion intensity, the preferential formation of hydrogen-poor ions, and minor cage disruption.
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Affiliation(s)
- Jens Reinbold
- Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Freiburg, Germany
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Landenberger P, Scheumann K, Keller M, Hunkler D, Fritz H, Wörth J, Knothe L, Prinzbach H. Pentagonal dodecahedranes: polyfunctionalization and MS fragmentation. J Org Chem 2001; 66:5744-58. [PMID: 11511248 DOI: 10.1021/jo010170+] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
With the use of four- to eight-fold functionalized dodecahedranes (1-3), opportunities to arrive at highly strained dodecahedranes with two to four pairs of vicinal, eclipsed bromine substituents through front-side substitution and addition reactions have been explored. In standard processes, the interception of beta-OCH(3) radical/cationic intermediates was not problematic (9-12, 37, 50). The interception of beta-CO(2)R radicals was possible for Cl(*) (18) but not for Br(*) (17). The interception of beta-chloro radicals was possible for Cl(*) (27) but not for Br(*) (26), and the interception of beta-Br cations ("bromonium ions") with Br(-) was modest (45) to highly inefficient (24, 26). Two X-ray structural analyses (dimethoxy dibromide 9 and tetramethoxy tetrabromide 53) indicated the structural consequences of the molecular strain introduced by the two (four) vicinal CH(3)O/Br pairs. A systematic analysis of the MS spectra confirms that, in virtually all cases studied, the elimination of the substituents occurs without significant carbon-cage disruption, leading ultimately to multiply unsaturated dodecahedral ions for dodecahedrahexa(C(20)H(8))enes, -hepta(C(20)H(6))enes, and -octa(C(20)H(4))enes.
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Affiliation(s)
- P Landenberger
- Chemisches Laboratorium der Universität Freiburg i. Br., Institut für Organische Chemie und Biochemie, Albertstrasse 21, D-79104 Freiburg i.Br., Germany
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Prinzbach H, Reinbold J, Bertau M, Voss T, Martin HD, Mayer B, Heinze J, Neschchadin D, Gescheidt G, Prakash GKS, Olah GA. σ-Bishomokonjugation (σ-Bishomoaromatizität) in 4C/3(2)e-Kationen - Voraussetzungen und Grenzen. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010302)113:5<930::aid-ange930>3.0.co;2-o] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Prinzbach H, Reinbold J, Bertau M, Voss T, Martin HD, Mayer B, Heinze J, Neschchadin D, Gescheidt G, Prakash GKS, Olah GA. σ-Bishomoconjugation (σ-Bishomoaromaticity) in 4C/3(2)e Cations—Scope and Limitations. Angew Chem Int Ed Engl 2001; 40:911-914. [DOI: 10.1002/1521-3773(20010302)40:5<911::aid-anie911>3.0.co;2-b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2000] [Indexed: 11/07/2022]
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Cross-coupling of highly pyramidalized alkenes: A straightforward access to functionalized tetrasecododecahedradienes. Org Lett 2000; 2:4225-8. [PMID: 11150205 DOI: 10.1021/ol0067843] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and chemical trapping of a highly pyramidalized pentacyclo[6.4.0.0(2,10).0(3,7).0(4,9)]dodec-8-ene containing ketal functions is reported. Its cross-coupling reaction with 3, 7-dimethyltricyclo[3.3.0.0(3,7)]oct-1(5)-ene followed by a [2 + 2] retrocycloaddition reaction gives a straightforward access to functionalized tetrasecododecahedradienes.
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Wollenweber M, Etzkorn M, Reinbold J, Wahl F, Voss T, Melder JP, Grund C, Pinkos R, Hunkler D, Keller M, Wörth J, Knothe L, Prinzbach H. [2.2.2.2]/[2.1.1.1]Pagodanes and [1.1.1.1]/[2.2.1.1]/[2.2.2.2]Isopagodanes: Syntheses, Structures, Reactivities − Benzo/Ene- and Benzo/Benzo-Photocycloadditions. European J Org Chem 2000. [DOI: 10.1002/1099-0690(200012)2000:23<3855::aid-ejoc3855>3.0.co;2-a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Broadus KM, Kass SR, Osswald T, Prinzbach H. Dodecahedryl Anion Formation and an Experimental Determination of the Acidity and C−H Bond Dissociation Energy of Dodecahedrane. J Am Chem Soc 2000. [DOI: 10.1021/ja002588f] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katherine M. Broadus
- Contribution from the Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Chemisches Laboratorium der Universität, Freiburg, Germany
| | - Steven R. Kass
- Contribution from the Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Chemisches Laboratorium der Universität, Freiburg, Germany
| | - Thomas Osswald
- Contribution from the Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Chemisches Laboratorium der Universität, Freiburg, Germany
| | - Horst Prinzbach
- Contribution from the Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Chemisches Laboratorium der Universität, Freiburg, Germany
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Hudson BS, Braden DA, Parker SF, Prinzbach H. The Vibrational Inelastic Neutron Scattering Spectrum of Dodecahedrane: Experiment and DFT Simulation. Angew Chem Int Ed Engl 2000. [DOI: 10.1002/(sici)1521-3757(20000204)112:3<524::aid-ange524>3.0.co;2-v] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Affiliation(s)
- R. James Cross
- Department of Chemistry, Yale University, Box 208107, New Haven, Connecticut 06520-8107, and Chemisches Laboratorium der Universität Freiburg, Chemisches Laboratorium der Universität Freiburg, Freiburg, Germany
| | - Martin Saunders
- Department of Chemistry, Yale University, Box 208107, New Haven, Connecticut 06520-8107, and Chemisches Laboratorium der Universität Freiburg, Chemisches Laboratorium der Universität Freiburg, Freiburg, Germany
| | - Horst Prinzbach
- Department of Chemistry, Yale University, Box 208107, New Haven, Connecticut 06520-8107, and Chemisches Laboratorium der Universität Freiburg, Chemisches Laboratorium der Universität Freiburg, Freiburg, Germany
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Pinkos R, Weiler A, Voss T, Weber K, Wahl F, Melder JP, Fritz H, Hunkler D, Prinzbach H. From Pagodanes to Homologous, Non-Pentagonal Dodecahedranes. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/jlac.199719971010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
24
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Butenschön H. Pentalen als Komplexligand: neue Entwicklungen in der Chemie nichtalternierender hochungesättigter Kohlenwasserstoffe. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971091605] [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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Bertau M, Wahl F, Weiler A, Scheumann K, Wörth J, Keller M, Prinzbach H. From Pagodanes to Dodecahedranes - Search for a Serviceable Access to the Parent (C 20 H 20 ) Hydrocarbon ** **Dedicated to Professor W. von E. Doering on the occasion of his 80th birthday. H.P. very fondly remembers his two post-doc years at Yale University (1957–59). Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00345-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Sharma V, Keller M, Weiler A, Hunkler D, Prinzbach H. Von Pagodanen zu nichtpentagonalen (Homo)Dodecahedranen – der Undecacyclo[10. 10.10.0.02, 20.03, 10.04, 19.05, 9.− 06, 18.07, 15.08, 13.019, 22.016, 21]docosan-Käfig. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961082338] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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