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Korb M, Mahrholdt J, Lang H. (Planar‐Chiral) Ferrocenylmethanols: From Anionic Homo Phospho‐Fries Rearrangements to α‐Ferrocenyl Carbenium Ions. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700645] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Marcus Korb
- Technische Universität Chemnitz Faculty of Natural Sciences Institute of Chemistry Inorganic Chemistry 09107 Chemnitz Germany
| | - Julia Mahrholdt
- Technische Universität Chemnitz Faculty of Natural Sciences Institute of Chemistry Inorganic Chemistry 09107 Chemnitz Germany
| | - Heinrich Lang
- Technische Universität Chemnitz Faculty of Natural Sciences Institute of Chemistry Inorganic Chemistry 09107 Chemnitz Germany
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2
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Cherkasov AR, Jonsson M, Galkin VI, Cherkasov RA. Correlation analysis in the chemistry of free radicals. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc2001v070n01abeh000574] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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3
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Peyman A, Beckhaus H, Kramer D, Peters K, Schnering HGV, Rüchardt C. Thermolabile Kohlenwasserstoffe, 31 Stereoselektive Bildung und Spaltung der Dimeren des 1‐(5,6,7,8‐Tetrahydro‐1‐naphyl)neopentyl‐Radikals. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19911240918] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anuschirwan Peyman
- Institut für Organische Chemie und Biochemie, AlbertstraBe 21, W‐7800 Freiburg i. Br
| | - Hans‐Dieter Beckhaus
- Institut für Organische Chemie und Biochemie, AlbertstraBe 21, W‐7800 Freiburg i. Br
| | - Dirk Kramer
- Institut für Organische Chemie und Biochemie, AlbertstraBe 21, W‐7800 Freiburg i. Br
| | - Karl Peters
- Max‐Planck‐Institut für Festkörperforschungb, Heisenbergstraße 1, W‐7000 Stuttgart 80
| | | | - Christoph Rüchardt
- Max‐Planck‐Institut für Festkörperforschungb, Heisenbergstraße 1, W‐7000 Stuttgart 80
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4
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Peyman A, Beckhaus H, Rüchardt C. Intramolecular reactions of 1,5‐diaryl‐1,5‐pentadiyl radicals. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19881210603] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anuschirwan Peyman
- Institut für Organische Chemie und Biochemie der Universität Freiburg, Albertstraße 21, D‐7800 Freiburg i. Br
| | - Hans‐Dieter Beckhaus
- Institut für Organische Chemie und Biochemie der Universität Freiburg, Albertstraße 21, D‐7800 Freiburg i. Br
| | - Christoph Rüchardt
- Institut für Organische Chemie und Biochemie der Universität Freiburg, Albertstraße 21, D‐7800 Freiburg i. Br
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5
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Peyman A, Peters K, von Schnering HG, Rüchardt C. Struktur und Reaktivität des α,
p
‐Dimers aus 2,2‐Dimethyl‐1‐(1‐naphthyl)propyl‐Radikalen. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19901230923] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anuschirwan Peyman
- Institut für Organische Chemie und Biochemie der Universität Freiburg, Albertstraße 21, D‐7800 Freiburg i. Br
| | - Karl Peters
- Max‐Planck‐Institut für Festkörperforschung, Heisenbergstraße 1, D‐7000 Stuttgart 80
| | | | - Christoph Rüchardt
- Institut für Organische Chemie und Biochemie der Universität Freiburg, Albertstraße 21, D‐7800 Freiburg i. Br
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6
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Schulze R, Beckhaus HD, Rüchardt C. Substituenteneffekte auf die CC-Bindungsstärke. IX. Thermolabilität der 2,3-Di(N,N-dialkylamino)-bernsteinsäure-diethylester. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19903320308] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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7
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Engel PS, Pan L, Ying Y, Alemany LB. Thermolysis of free-radical initiators: tert-butylazocumene and its 1,3- and 1,4-bisazo and 1,3,5-trisazo analogues. J Am Chem Soc 2001; 123:3706-15. [PMID: 11457102 DOI: 10.1021/ja003914u] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Four tert-butylazocumenes (4-7) were prepared from the corresponding cyanobenzenes, and their nitrogen evolution kinetics and products were analyzed. In combination with TEMPO, the simplest compound, tert-butylazocumene (4), shows promise as a "one-radical" initiator of styrene polymerization. The ABNO-trapped cumyl radical 29 is a particularly stable trialkylhydroxylamine, whose thermolysis half-life is 2.1 h at 150 degrees C. Taking advantage of this stability, we trapped the cumyl radical centers from 7 to afford tris adduct 32a. While the behavior of the meta bisazoalkane 6 can be mostly predicted from that of 4, the para isomer 5 exhibits both unusual products and kinetics, attributed to the formation of quinodimethane 33 via azo-containing radical 34. In fact, flash vacuum pyrolysis of 5 allowed observation of the (1)H and (13)C NMR spectra of 33, whose persistence even at ambient temperature showed that this quinodimethane is far more stable than the parent 36. Finally, evidence is presented that 7 is an initiator of star polymerization.
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Affiliation(s)
- P S Engel
- Department of Chemistry, Rice University, P.O. Box 1892, Houston, Texas 77251, USA
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8
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Verevkin SP, Beckhaus HD, Rüchardt C, Haag R, Kozhushkov SI, Zywietz T, de Meijere A, Jiao H, Schleyer PVR. An Experimental Thermochemical and Theoretical Study of Triquinacene: Definitive Disproof of Its Neutral Homoaromaticity. J Am Chem Soc 1998. [DOI: 10.1021/ja981680x] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergey P. Verevkin
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
| | - Hans-Dieter Beckhaus
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
| | - Christoph Rüchardt
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
| | - Rainer Haag
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
| | - Sergei I. Kozhushkov
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
| | - Tosja Zywietz
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
| | - Armin de Meijere
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
| | - Haijun Jiao
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
| | - Paul von Ragué Schleyer
- Contribution from the Institut für Organische Chemie und Biochemie der Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany, Institut für Organische Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, D-37077 Göttingen, Germany, and Computer Chemistry Center of the Institut für Organische Chemie der Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, D-91054 Erlangen, Germany
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9
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Kim SS, Liu B, Park CH, Lee KH. Homolytic Rearrangements of Ketenimines to Nitriles: Employments of Hammett Dual Parameters. J Org Chem 1998. [DOI: 10.1021/jo971844c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sung Soo Kim
- Department of Chemistry and Center for Molecular Dynamics, Inha University, Inchon 402-751, South Korea
| | - Bo Liu
- Department of Chemistry and Center for Molecular Dynamics, Inha University, Inchon 402-751, South Korea
| | - Chul Hyun Park
- Department of Chemistry and Center for Molecular Dynamics, Inha University, Inchon 402-751, South Korea
| | - Kwang Ho Lee
- Department of Chemistry and Center for Molecular Dynamics, Inha University, Inchon 402-751, South Korea
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Rüchardt C, Gerst M, Ebenhoch J. Nichtkatalysierte Transferhydrierung und Transferhydrogenolyse: neue Wege der Wasserstoffübertragung. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971091306] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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12
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Welle FM, Verevkin SP, Beckhaus HD, Rüchardt C. Substituent Effects on the CC Bond Strength, 20. – Geminal Substituent Effects, 14. – Stabilization of the Cyano(dimethylamino)methyl Radical – Synergistic effect Due to Interaction Between α-Amino and α-Cyano Groups on the Radical Stabilization Energy. ACTA ACUST UNITED AC 1997. [DOI: 10.1002/jlac.199719970122] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Herberg C, Peyman A, Nölke M, Beckhaus HD, Rüchardt C. Substituent effects on the CC bond strength, 18. Stabilization of alkyl radicals by 4-pyridyl, 1-naphthyl or 2-naphthyl substituents in α-position. European J Org Chem 1995. [DOI: 10.1002/jlac.1995199505128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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14
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Nölke M, Verevkin SP, Beckhaus HD, Rüchardt C. Substituenteneffekte auf die CC-Bindungsstärke, 16. Thermische Stabilität und Bildungsenthalpie von β-Dicarbonylverbindungen. — Stabilisierung von α,α′-Diketoalkyl-Radikalen. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.199519950108] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Rakus K, Verevkin SP, Beckhaus HD, Rüchardt C. Substituent Effects on the C-C Bond Strength, 15[1] Geminal Substituent Effects, 7[2]. Thermochemistry and Thermal Decomposition of Alkyl-substituted Tricyanomethyl Compounds. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/cber.1491271122] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Schaffer F, Beckhaus HD, Rieger HJ, Rüchard C. Bimolecular Formation of Radicals by H-Transfer, 6. Uncatalyzed Transfer Hydrogenation of a Benzhydryl Fluoride by 9,10-Dihydroanthracene. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/cber.19941270316] [Citation(s) in RCA: 11] [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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17
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Birkhofer H, Beckhaus HD, Peters K, Schnering HGV, Rüchardt C. Substituenteneffekte auf die C–C-Bindungsstärke, 12[1]. Thermolysen aromatischer Pinakol-dimethylether zur Bestimmung der Stabilisierungsenergie von α-Methoxybenzyl-Radikalen[2]. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/cber.19931260728] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Schulze R, Beckhaus HD, Rüchardt C. Substituenteneffekte auf die CC-Bindungsstärke, 13. Kinetische und thermodynamische Stabilität von α1-alkylierten α1-Amino-carbonsäureestern – Stabilisierungsenergie von α1-Amino-α1-(ethoxycarbonyl)alkyl-Radikalen. ACTA ACUST UNITED AC 1993. [DOI: 10.1002/cber.19931260425] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Veeraraghavan Ramachandran P, Teodorovic' AV, Brown HC. Chiral synthesis via organoboranes. 38. Selective reductions. 48. Asymmetric reduction of trifluoromethyl ketones by B-chlorodiisopinocampheylborane in high enantiomeric purity. Tetrahedron 1993. [DOI: 10.1016/s0040-4020(01)80530-5] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Fessner WD, Murty BARC, Spurr PR, Pinkos R, Melder JP, Fritz H, Prinzbach H. The Pagodane Route to Dodecahedranes Directed Conversions – The Pagodane → Bissecododecahedradiene Stage. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/cber.19921250727] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Peyman A, Beckhaus HD. Modeling a reaction path by molecular mechanics: Dimerization of carbon free radicals. J Comput Chem 1992. [DOI: 10.1002/jcc.540130502] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Peyman A, Beckhaus HD. Calculation of the entropy caused by hindered internal rotation—a mechanistic tool to explore the steric influence on the entropy of activation. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0097-8485(90)80047-6] [Citation(s) in RCA: 5] [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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23
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Fritzsche K, Beckhaus HD, Rüchardt C. Thermischer zerfall von β-phenyl- und β,β-diphenyl- nitroalkanen. Tetrahedron Lett 1988. [DOI: 10.1016/0040-4039(88)85215-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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24
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25
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Beckhaus HD, Rüchardt C. Der Solvenseinfluß auf die Stabilität mero-substituierter Alkylradikale. Angew Chem Int Ed Engl 1987. [DOI: 10.1002/ange.19870990824] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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