Catch and Release: Orbital Symmetry Guided Reaction Dynamics from a Freed “Tension Trapped Transition State”
Abstract
The dynamics of reactions at or in the immediate vicinity of transition states are critical to reaction rates and product distributions, but direct experimental probes of those dynamics are rare. In this paper, s-trans, s-trans 1,3-diradicaloid transition states are trapped by tension along the backbone of purely cis-substituted gem-difluorocyclopropanated polybutadiene using the extensional forces generated by pulsed sonication of dilute polymer solutions. Once released, the branching ratio between symmetry-allowed disrotatory ring closing (of which the trapped diradicaloid structure is the transition state) and symmetry-forbidden conrotatory ring closing (whose transition state is nearby) can be inferred. Finally, net conrotatory ring closing occurred in 5.0 ± 0.5% of the released transition states, in excellent agreement with ab initio molecular dynamics simulations.
- Authors:
-
- Duke Univ., Durham, NC (United States). Dept. of Chemistry
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Materials Science Division
- Stanford Univ., CA (United States). Dept. of Chemistry
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Stanford Univ., CA (United States); Duke Univ., Durham, NC (United States)
- Sponsoring Org.:
- USDOE; US Army Research Office (ARO)
- OSTI Identifier:
- 1255180
- Report Number(s):
- LLNL-JRNL-663112
Journal ID: ISSN 0022-3263
- Grant/Contract Number:
- AC52-07NA27344; W911NF-07-0409
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Organic Chemistry
- Additional Journal Information:
- Journal Volume: 80; Journal Issue: 23; Journal ID: ISSN 0022-3263
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Wang, Junpeng, Ong, Mitchell T., Kouznetsova, Tatiana B., Lenhardt, Jeremy M., Martínez, Todd J., and Craig, Stephen L. Catch and Release: Orbital Symmetry Guided Reaction Dynamics from a Freed “Tension Trapped Transition State”. United States: N. p., 2015.
Web. doi:10.1021/acs.joc.5b01493.
Wang, Junpeng, Ong, Mitchell T., Kouznetsova, Tatiana B., Lenhardt, Jeremy M., Martínez, Todd J., & Craig, Stephen L. Catch and Release: Orbital Symmetry Guided Reaction Dynamics from a Freed “Tension Trapped Transition State”. United States. https://doi.org/10.1021/acs.joc.5b01493
Wang, Junpeng, Ong, Mitchell T., Kouznetsova, Tatiana B., Lenhardt, Jeremy M., Martínez, Todd J., and Craig, Stephen L. Mon .
"Catch and Release: Orbital Symmetry Guided Reaction Dynamics from a Freed “Tension Trapped Transition State”". United States. https://doi.org/10.1021/acs.joc.5b01493. https://www.osti.gov/servlets/purl/1255180.
@article{osti_1255180,
title = {Catch and Release: Orbital Symmetry Guided Reaction Dynamics from a Freed “Tension Trapped Transition State”},
author = {Wang, Junpeng and Ong, Mitchell T. and Kouznetsova, Tatiana B. and Lenhardt, Jeremy M. and Martínez, Todd J. and Craig, Stephen L.},
abstractNote = {The dynamics of reactions at or in the immediate vicinity of transition states are critical to reaction rates and product distributions, but direct experimental probes of those dynamics are rare. In this paper, s-trans, s-trans 1,3-diradicaloid transition states are trapped by tension along the backbone of purely cis-substituted gem-difluorocyclopropanated polybutadiene using the extensional forces generated by pulsed sonication of dilute polymer solutions. Once released, the branching ratio between symmetry-allowed disrotatory ring closing (of which the trapped diradicaloid structure is the transition state) and symmetry-forbidden conrotatory ring closing (whose transition state is nearby) can be inferred. Finally, net conrotatory ring closing occurred in 5.0 ± 0.5% of the released transition states, in excellent agreement with ab initio molecular dynamics simulations.},
doi = {10.1021/acs.joc.5b01493},
journal = {Journal of Organic Chemistry},
number = 23,
volume = 80,
place = {United States},
year = {Mon Aug 31 00:00:00 EDT 2015},
month = {Mon Aug 31 00:00:00 EDT 2015}
}
Web of Science
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