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Abstract
We suggest four new benzene dimers, (C(6)H(6))(2), all featuring one or more cyclohexadiene rings trans-fused to 4- or 6-membered rings. These hypothetical dimers are 50-99 kcal/mol less stable than two benzenes, but have computed activation energies to fragmentation ≥27 kcal/mol. A thorough search of potential escape routes was undertaken, through cyclobutane ring cleavage to 12-annulenes, sigmatropic 1,5-H-shifts, electrocyclic ring-openings of the 6-membered rings, and Diels-Alder dimerizations. Some channels for reaction emerge, but there is a reasonable chance that some of these new benzene dimers can be made.
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Affiliation(s)
- Andrey Yu Rogachev
- Baker Laboratory, Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301, United States
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Gan H, Horner MG, Hrnjez BJ, McCormack TA, King JL, Gasyna Z, Chen G, Gleiter R, Yang NCC. Chemistry of syn-o,o‘-Dibenzene. J Am Chem Soc 2000. [DOI: 10.1021/ja0023579] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hong Gan
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
| | - M. Glenn Horner
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
| | - Bruce J. Hrnjez
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
| | - Thomas A. McCormack
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
| | - John L. King
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
| | - Zbigniew Gasyna
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
| | - Grace Chen
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
| | - Rolf Gleiter
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
| | - Nien-chu C. Yang
- Contribution from the Department of Chemistry, University of Chicago, Illinois 60637, and Organisches-Chemisches Institut der Universität, Heidelberg, D-69120 Heidelberg, Germany
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Affiliation(s)
- Taehee Noh
- Contribution from the Department of Chemistry, University of Chicago, Chicago, Illinois 60637
| | - Hong Gan
- Contribution from the Department of Chemistry, University of Chicago, Chicago, Illinois 60637
| | - Sharon Halfon
- Contribution from the Department of Chemistry, University of Chicago, Chicago, Illinois 60637
| | - Bruce J. Hrnjez
- Contribution from the Department of Chemistry, University of Chicago, Chicago, Illinois 60637
| | - Nien-chu C. Yang
- Contribution from the Department of Chemistry, University of Chicago, Chicago, Illinois 60637
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Lay W, Mackenzie K, Miller A, Williams-Smith D. Pericyclic transformations of tetracyclo[8,2,1,02,903,8]trideca-4,6,11-trienes,and formation of dihydrosemibullvalenes by thermal intramolecula. Tetrahedron 1980. [DOI: 10.1016/0040-4020(80)88028-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Akhtar IA, Atkins RJ, Fray GI, Geen GR, King TJ. Reactions of cyclo-octatetraene and its derivatives—IX. Tetrahedron 1980. [DOI: 10.1016/0040-4020(80)88029-x] [Citation(s) in RCA: 9] [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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Fray G, Lay W, Mackenzie K, Miller A. Thermal transformation of [π4a + π2a]cycloadducts of tetracyclone and tricyclo[4.2.2.02,5] deca-3,7-dienes: sequential decarbonylation, retro-6π electrocyclisation, and intramolecular [π4a + π2a]cycloaddition. Tetrahedron Lett 1979. [DOI: 10.1016/s0040-4039(01)86394-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Paquette LA, Stowell JC. Stereochemistry of a thermal rearrangement in the (CH)12 series. Establishment of the suprafacial nature of a [1,5] carbon migration. Tetrahedron Lett 1969. [DOI: 10.1016/s0040-4039(01)88642-1] [Citation(s) in RCA: 3] [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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