Model compounds of ruthenium-alkene intermediates in olefin metathesis reactions

INOR 323

Donde R. Anderson1, Daniel J. O'Leary, doleary@pomona.edu2, Daniel D Hickstein2, and Robert H. Grubbs, rhg@caltech.edu3. (1) Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 E California Blvd, M/C 164-30, Pasadena, CA 91125, (2) Department of Chemistry, Pomona College, 645 North College Avenue, Claremont, CA 91711, (3) Division of Chemistry and Chemical Engineering, Arnold and Mabel Beckman Laboratory of Chemical Synthesis, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125
The development of a model system to study ruthenium-olefin complexes relevant to the mechanism of olefin metathesis is reported. Upon addition of 1,2-divinylbenzene to (H2IMes)(py2)(Cl)2Ru=CHPh (H2IMes = 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene), two ruthenium-olefin adducts are formed. Based on 1H NMR spectroscopy experiments and X-ray crystallographic analysis, these complexes are assigned as side-bound isomers in which the olefin and H2IMes ligands are coordinated cis to each another. Characterization of these complexes as well as other Ru-alkene adducts bearing NHCs will be presented.
 

Organometallic: Catalysis
7:00 PM-10:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Sci-Mix

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006