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Yahiaoui O, Pašteka LF, Judeel B, Fallon T. Synthesis and Analysis of Substituted Bullvalenes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712157] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Oussama Yahiaoui
- Institute of Natural and Mathematical Sciences; Massey University; 1/5 University Avenue Albany Auckland 0632 New Zealand
| | - Lukáš F. Pašteka
- Centre for Theoretical Chemistry and Physics, NZIAS; Massey University; Oaklands Road Albany Auckland 0632 New Zealand
- Department of Physical and Theoretical Chemistry; Faculty of Natural Sciences; Comenius University; Ilkovičova 6 Bratislava Slovakia
- Centre for Advanced Study; Norwegian Academy of Science and Letters; Drammensveien 78 NO-0271 Oslo Norway
| | - Bernadette Judeel
- Institute of Natural and Mathematical Sciences; Massey University; 1/5 University Avenue Albany Auckland 0632 New Zealand
| | - Thomas Fallon
- Institute of Natural and Mathematical Sciences; Massey University; 1/5 University Avenue Albany Auckland 0632 New Zealand
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Yahiaoui O, Pašteka LF, Judeel B, Fallon T. Synthesis and Analysis of Substituted Bullvalenes. Angew Chem Int Ed Engl 2018; 57:2570-2574. [PMID: 29314602 DOI: 10.1002/anie.201712157] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Indexed: 01/01/2023]
Abstract
Herein we detail a practical synthesis of bullvalene and a variety of mono- and disubstituted analogues through cobalt-catalysed [6+2] cycloaddition of cyclooctatetraene to alkynes, followed by photochemical di-π-methane rearrangement. The application of isomer-network analysis, coupled with quantum-chemical calculations, provides a powerful automated tool for predicting the properties of bullvalene isomer networks.
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Affiliation(s)
- Oussama Yahiaoui
- Institute of Natural and Mathematical Sciences, Massey University, 1/5 University Avenue, Albany, Auckland, 0632, New Zealand
| | - Lukáš F Pašteka
- Centre for Theoretical Chemistry and Physics, NZIAS, Massey University, Oaklands Road, Albany, Auckland, 0632, New Zealand.,Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, Bratislava, Slovakia.,Centre for Advanced Study, Norwegian Academy of Science and Letters, Drammensveien 78, NO-0271, Oslo, Norway
| | - Bernadette Judeel
- Institute of Natural and Mathematical Sciences, Massey University, 1/5 University Avenue, Albany, Auckland, 0632, New Zealand
| | - Thomas Fallon
- Institute of Natural and Mathematical Sciences, Massey University, 1/5 University Avenue, Albany, Auckland, 0632, New Zealand
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Gillick-Healy MW, Jennings EV, Müller-Bunz H, Ortin Y, Nikitin K, Gilheany DG. Two Independent Orthogonal Stereomutations at a Single Asymmetric Center: A Narcissistic Couple. Chemistry 2016; 23:2332-2339. [DOI: 10.1002/chem.201604080] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Indexed: 01/31/2023]
Affiliation(s)
| | | | | | - Yannick Ortin
- School of Chemistry; University College Dublin; Ireland
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Semenov SG, Makarova MV. Quantum chemical study of the products and hypothetical intermediates in the dehydrobromination of bromobullvalene in furan. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2014. [DOI: 10.1134/s1070428014070112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Quast H, Seidenspinner HM, Stawitz JW. 2,2′-Bis-azonia-Cope Rearrangements of 2,3-Homo-6 H-1,4-diazepinium Dications. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Semenov SG, Makarova MV. Quantum chemical study of tautomerism of bullvalene, bullvalenol, and the corresponding ketone. RUSS J GEN CHEM+ 2012. [DOI: 10.1134/s1070363212090125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Klumpp GW. Synthesis and properties of 5-tetracyclo[4.3.0.02,4.03,7]non-8-enyl derivatives: (Preliminary communication). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19680870913] [Citation(s) in RCA: 6] [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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9
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Lippert AR, Keleshian VL, Bode JW. Dynamic supramolecular complexation by shapeshifting organic molecules. Org Biomol Chem 2009; 7:1529-32. [DOI: 10.1039/b822585k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Böhm MC, Ramírez R, Schulte J. On the influence of vibrational modes and intramolecular isomerization processes on the NMR parameters of bullvalene: A Feynman path integral – ab initio investigation. Chem Phys 2007. [DOI: 10.1016/j.chemphys.2007.09.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Binsch G. The Study of Intramolecular Rate Processes by Dynamic Nuclear Magnetic Resonance. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/9780470147122.ch2] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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12
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Schulte J, Ramírez R, Böhm MC. Influence of nuclear fluctuations on the NMR parameters of bullvalene: A Feynman path integral – Ab initio study. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.10.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Schröder G, Witt W. Kronenether mit fluktuierender Ringgröße („Atmende Kronenether”︁). Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.19790910416] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gerhard Schröder
- Institut für Organische Chemie der Universität Richard‐Willstätter‐Allee 2, D‐7500 Karlsruhe 1
| | - Walter Witt
- Institut für Organische Chemie der Universität Richard‐Willstätter‐Allee 2, D‐7500 Karlsruhe 1
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(C
6
H
6
)
n
‐Kohlenwasserstoffe. Synthese von hexacyclischen (C
6
H
6
)
3
‐Derivaten durch eine mehrstufige, stereospezifische Eintopfreaktion. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19761090626] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bicker R, Kessler H, Steigel A, Stohrer W. Substituenteneinfluß auf sigmatrope Reaktionen, I. 3‐Methylhomotropiliden. Synthese und Lage des Gleichgewichtes. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19751080829] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Richard Bicker
- Institut für Organische Chemie der Universität Frankfurt a. M., Laboratorium Niederrad, D‐6000 Frankfurt a. M. 70, Theodor‐Stern‐Kai 7
| | - Horst Kessler
- Institut für Organische Chemie der Universität Frankfurt a. M., Laboratorium Niederrad, D‐6000 Frankfurt a. M. 70, Theodor‐Stern‐Kai 7
| | - Alois Steigel
- Institut für Organische Chemie der Universität Frankfurt a. M., Laboratorium Niederrad, D‐6000 Frankfurt a. M. 70, Theodor‐Stern‐Kai 7
| | - Wolf‐Dieter Stohrer
- Institut für Organische Chemie der Universität Frankfurt a. M., Laboratorium Niederrad, D‐6000 Frankfurt a. M. 70, Theodor‐Stern‐Kai 7
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Welt G, Wolf E, Fischer P, Föhlisch B. Unterschiedliche [4 + 2]‐Cycloaddukte aus 7,7‐Difluor‐ und 7,7‐Dialkoxy‐1,3,5‐cycloheptatrienen mit 4‐Phenyl‐1,2,4‐triazolin‐3,5‐dion. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19821151019] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Günther Welt
- Institut für Organische Chemie, Biochemie und Isotopenforschung der Universität Stuttgart, Pfaffenwaldring 55, D‐7000 Stuttgart 80
| | - Elisabeth Wolf
- Institut für Organische Chemie, Biochemie und Isotopenforschung der Universität Stuttgart, Pfaffenwaldring 55, D‐7000 Stuttgart 80
| | - Peter Fischer
- Institut für Organische Chemie, Biochemie und Isotopenforschung der Universität Stuttgart, Pfaffenwaldring 55, D‐7000 Stuttgart 80
| | - Baldur Föhlisch
- Institut für Organische Chemie, Biochemie und Isotopenforschung der Universität Stuttgart, Pfaffenwaldring 55, D‐7000 Stuttgart 80
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Quast H, Görlach Y, Stawitz J. 2,6-Barbaralandicarbonitril: Eine Sonde für den Dewar-Hoffmann-Typ homoaromatischer Moleküle. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.19810930117] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Baumann H, Voellinger-Borel A. Comparative study of thecoperearrangement of hexa-1,5-diene and barbaralane. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19970800711] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Quast H, Görlach Y, Stawitz J. 2,6-Barbaralane Dicarbonitrile: A Probe for Dewar-Hoffmann-Type Homoaromatic Molecules. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/anie.198100931] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Schröder G, Witt W. Crown Ethers with Fluctuating Ring Size (“Breathing Crown Ethers”). ACTA ACUST UNITED AC 2003. [DOI: 10.1002/anie.197903111] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gerhard Schröder
- Institut für Organische Chemie der Universität Richard‐Willstätter‐Allee 2, D‐7500 Karlsruhe 1 (Germany)
| | - Walter Witt
- Institut für Organische Chemie der Universität Richard‐Willstätter‐Allee 2, D‐7500 Karlsruhe 1 (Germany)
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Heubes M, Dietz T, Quast H, Seefelder M, Witzel A, Gadgil VR, Williams RV. Lifting of the degeneracy in semibullvalenes by remote and direct substituents: a quantitative study using variable-temperature carbon-13 NMR spectroscopy. J Org Chem 2001; 66:1949-60. [PMID: 11300887 DOI: 10.1021/jo001062a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of six 1,5-(ethylmethyl)semibullvalenes (1a <==> 1a', 2 <==> 2', 3 <==>3') and two 4(2)-substituted semibullvalenes (4 <==> 4'), each undergoing Cope equilibria between nondegenerate valence tautomers, was investigated by carbon-13 NMR spectroscopy at a range of temperatures in several different solvents. Gompper's treatment of substituent perturbation was extended, specifically accounting for the effects of the substituents on chemical shifts, to allow the determination of the thermodynamic parameters for these skewed equilibria. These new treatments were used to determine the population difference (f - f ') between the valence tautomers and the perturbation thermodynamic quantities DeltaH(P), DeltaS(P), and DeltaG(P). The slow-exchange limit was reached for the parent 1,5-(ethylmethyl)semibullvalenes 3a <==> 3a' from which it was established that the preferred valence tautomer is 3a with the ethyl group on the cyclopropane ring. Despite considerable effort, the slow-exchange limit could not be reached in any of our other remotely substituted semibullvalenes. Provided that the ethyl group always prefers the cyclopropyl position as in 3a, the 1-ethyl-5-methylsemibullvalenes 1a, 2, and 3 are more stable by DeltaH(P) = 0.7-1.7 kJ mol(-1) than their valence tautomers 1a', 2', and 3'. In the directly substituted semibullvalenes (4 left harpoon ovet right harpoon 4'), the preferred valence tautomers 4a and 4b have the bromine atom or the nitrile group on the vinyl position (C(4)) rather than on the cyclopropane ring (C(2)) and are more stable than 4a' and 4b' by DeltaH(P) = 4.8 and 7.0 kJ mol(-1), respectively.
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Affiliation(s)
- M Heubes
- Department of Chemistry, University of Idaho, PO Box 442343, Moscow, Idaho 83844-2343, USA
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Quast H, Witzel M, Peters EM, Peters K, von Schnering HG. Syntheses and structures of 3,7-substituted barbaralanes. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.1995199505108] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Luz Z, Poupko R, Alexander S. Theory of dynamic magic angle spinning nuclear magnetic resonance and its application to carbon‐13 in solid bullvalene. J Chem Phys 1993. [DOI: 10.1063/1.465684] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Korth HG, Sustmann R, Sicking W, Klärner FG, Tashtoush HI. Rearrangements of Free Radicals, XIII[1]. Thermal and Photochemical Rearrangements of Cyclic C8H9 Radicals in Adamantane Matrix. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/cber.19931260824] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Quast H, Knoll K, Peters EM, Peters K, Schnering HGV. 2,4,6,8-Tetraphenylbarbaralan – ein orangeroter, thermochromer Kohlenwasserstoff ohne Chromophor[1,2]. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/cber.19931260427] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Quast H, Röschert H, Peters EM, Peters K, Schnering HGV. [3.3.3]Propelladiendicarbonitrile. European J Org Chem 1989. [DOI: 10.1002/jlac.198919890190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2,6-Dicyanbarbaralane durch Phasentransfer-katalysierte Halogenierung/Dehydrohalogenierung von Bicyclo[3.3.1]nona-2,6-dien-2,6-dicarbonitril. European J Org Chem 1989. [DOI: 10.1002/jlac.198919890191] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Quast H, Görlach Y, Peters EM, Peters K, von Schnering HG, Jackman LM, Ibar G, Freyer AJ. Synthese, Struktur und Cope-Umlagerung einiger 3,7-Dicyan-1,5-dimethylsemibullvalene. ACTA ACUST UNITED AC 1986. [DOI: 10.1002/cber.19861190605] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kreutzberger A, Sellheim M. [Trichomonacidal agents. 2. Branched chain 4,6-disubstituted 2-cyanaminopyrimidines]. Arch Pharm (Weinheim) 1985; 318:801-6. [PMID: 4084027 DOI: 10.1002/ardp.19853180906] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Kreutzberger A, Sellheim M. Herbizide, 3. Mitt. Synthese von 4,6-Dialkyl-2-cyanaminopyrimidinen und Untersuchungen ihrer Struktur durch13C-NMR-Spektroskopie. Arch Pharm (Weinheim) 1985. [DOI: 10.1002/ardp.19853180502] [Citation(s) in RCA: 4] [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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Glock V, Wette M, Kla¨rner FG. Thermolyse von trans-bicyclo[6.1.0]nonatrienen; eine neue cyclopropan-“walk”-umlagerung und ein einfacher zugang zum 3,4-homoheptafulven-system. Tetrahedron Lett 1985. [DOI: 10.1016/s0040-4039(00)99066-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Quast H, Görlach Y, Stawitz J, Peters EM, Peters K, Schnering HGV. Synthese und Struktur von 2,6-Dicyanbicyclo[3.3.1]nona-2,6-dienen und 2,6-Dicyanbarbaralanen. ACTA ACUST UNITED AC 1984. [DOI: 10.1002/cber.19841170817] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Sarma K, Schröder G. Synthesen und Substitutionsverhalten einiger anellierter Bullvalene. ACTA ACUST UNITED AC 1984. [DOI: 10.1002/cber.19841170216] [Citation(s) in RCA: 5] [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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Klärner FG, Yaslak S, Wette M. Zur Stereochemie der Norcaradien-Norcaradien-Umlagerung, II. Die thermische Umlagerung optisch aktiver [Norcaradien ⇌ Cycloheptatrien]-Derivate. ACTA ACUST UNITED AC 1979. [DOI: 10.1002/cber.19791120412] [Citation(s) in RCA: 19] [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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Neuberg R, Schröder G, Oth JFM. Annulene, 28. Synthese von Fluor[18]annulen und 1,2-Dihalogen[18]annulenen sowie Versuche zur Darstellung von 1,2-Diaza[16]annulenen. ACTA ACUST UNITED AC 1978. [DOI: 10.1002/jlac.197819780903] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Nuclear magnetic resonance study of exchanging systems. V. A study on the cope rearrangement of bullvalene by 13C NMR. Tetrahedron Lett 1974. [DOI: 10.1016/s0040-4039(01)93138-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nakanishi H, Yamamoto O. THE NUCLEAR MAGNETIC RESONANCE STUDY OF EXCHANGING SYSTEMS. III. COPE REARRANGEMENT OF CYCLOOCTATETRAENE DIMER BY13C NMR TOTAL LINE SHAPE ANALYSIS. CHEM LETT 1973. [DOI: 10.1246/cl.1973.1273] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Population analysis of 2,8-pentamethylenesemibullvalene. Direct observation of individual nondegenerate valence isomers. Tetrahedron Lett 1973. [DOI: 10.1016/s0040-4039(01)96070-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Vogel E, Wiedemann W, Roth HD, Eimer J, Günther H. Ein Beitrag zum Norcaradien- Cycloheptatrien-Strukturproblem. ACTA ACUST UNITED AC 1972. [DOI: 10.1002/jlac.19727590102] [Citation(s) in RCA: 71] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Gillespie P, Hoffman P, Klusacek H, Marquarding D, Pfohl S, Ramirez F, Tsolis EA, Ugi I. Non-rigid Molecular Skeletons?Berry Pseudorotation and Turnstile Rotation. ACTA ACUST UNITED AC 1971. [DOI: 10.1002/anie.197106871] [Citation(s) in RCA: 140] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Gillespie P, Hoffmann P, Klusacek H, Marquarding D, Pfohl S, Ramirez F, Tsolis EA, Ugi I. Bewegliche Molekülgerüste – Pseudorotation und Turnstile-Rotation pentakoordinierter Phosphorverbindungen und verwandte Vorgänge. Angew Chem Int Ed Engl 1971. [DOI: 10.1002/ange.19710831706] [Citation(s) in RCA: 94] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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OthSowie Eckhard JFM, Röttele H, Schröder G. Über Moleküle mit fluktuierenden Bindungen, XVIII. Bullvalenyl-magnesiumbromid, Bibullvalenyl, Bullvalencarbonsäure, Methoxycarbonyl- und Methyl-bullvalen. ACTA ACUST UNITED AC 1971. [DOI: 10.1002/jlac.19717450115] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Kessler H. Nachweis gehinderter Rotationen und Inversionen durch NMR-Spektroskopie. Angew Chem Int Ed Engl 1970. [DOI: 10.1002/ange.19700820603] [Citation(s) in RCA: 408] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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