The structures of Mo alkylidene initiators for ring-opening metathesis polymerization (ROMP) have a drastic impact on the structure and properties of the polymers formed. The mechanisms of ROMP initiation and propagation have been studied for both Mo monoaryloxide pyrrolide (MAP) imido alkylidenes and Mo bis-alkoxide imido alkylidenes.  The mechanism for isomerization / rearrangement of the intermediate species during propagation was found to have a dramatic effect on the polymer structure.  The structure and reactivity of disubstituted alkylidenes was investigated to identify the species that are relevant to the rearrangement mechanism of Mo(IV) species that initiate ROMP.

Fundamental studies of the rearrangement and isomerization of high oxidation state Mo compounds relevant to ring-opening metathesis polymerization

246th National Meeting (2013)

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