Ruthenium Metallacycles Derived from 14-Electron Complexes. New Insights into Olefin Metathesis Intermediates
- Creators
- Wenzel, Anna G.
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Grubbs, Robert H.
Abstract
Ruthenium(IV) metallacycles derived from both ethylene and propene are reported. The propene-derived metallacycles represent the first observed examples of substituted ruthenacyclobutanes and offer new insight into the preferred stereochemical orientation about metathesis intermediates. In addition, a metallacycle possessing an unsymmetrical N-heterocyclic carbene (NHC) ligand was prepared and investigated to ascertain the dynamics of the NHC relative to the metallacycle ring. Metallacycles investigated were found to possess exchange cross-peaks between the α- and β-positions in the 2D NMR, indicating a dynamic structure. The implications of these results to the mechanism of ruthenium-catalyzed olefin metathesis are discussed.
Additional Information
© 2006 American Chemical Society. Received 14 September 2006. Published online 29 November 2006. Published in print 1 December 2006. The authors thank Dr. Phillip Dennison and the U.C. Irvine NMR Facility for the generous donation of instrument time for the propene VT NMR experiments. Theodor Agapie is acknowledged for his instruction on Schlenk techniques for quantitated gas additions. Special thanks also goes to Professor Daniel O'Leary of Pomona College for invaluable research discussion. Funding was provided by NIH. Postdoctoral funding for A.G.W. was provided by NIH (NRSA GM070147-02) and UNCF-Pfizer.Attached Files
Supplemental Material - ja0666598si20061110_100650.pdf
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Additional details
- Eprint ID
- 77501
- Resolver ID
- CaltechAUTHORS:20170516-131731380
- University of California, Irvine
- GM070147-02
- NIH Predoctoral Fellowship
- UNCF-Pfizer
- Created
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2017-05-16Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field