Molybdenum and Tungsten Alkylidene Complexes for Z- and E-selective Ring-Opening Metathesis Polymerization
Abstract : The Nobel Prize chemistry was awarded in 2005 to Chauvin, Grubbs, and Schrock “for the development of the metathesis method in organic synthesis”. Olefin Metathesis reactions involving exchange of substituents on olefins in the presence of transition metal-based catalyst have been as one of the most powerful tools in forming carbon-carbon double bonds. In polymer chemistry, physical properties of polymers are highly related to their primary structure, so precise control of polymer structure has been pursued over the year. Ring-Opening Metathesis Polymerization (ROMP) has provided a great tool to meet this goal. The synthesis of well-defined molybdenum and tungsten metathesis catalysts and the synthesis of stereoregular polymers from strained monomers through ROMP will be presented.