Molybdenum and tungsten alkylidene compounds containing the bulky 2,6-dimesitylphenylimido ligand have been synthesized.  A novel synthetic route has been developed that utilizes intermediate species that contain two imido ligands with different substituents.  Bispyrrolide species can be synthesized catalyst precursors.  From the bispyrrolide compounds, monoalkoxide pyrrolide (MAP) species can be synthesized by addition of one equivalent of alcohol.  Study of the effect of the 2,6-dimesitylphenylimido ligand on alkylidene isomerism and on olefin metathesis will be presented, with an emphasis on the selectivity of ring-opening metathesis polymerization.

Molybdenum and tungsten olefin metathesis catalysts containing a 2,6-dimesitylphenylimido ligand

244th National Meeting (2012)

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