Catalyst for ring expansion metathesis polymerization of cyclic monomers
AssigneeUniversity of Florida Research Foundation, Inc.
InventorsAdam S. Veige, Stella Almeida Gonsales
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Abstract
A tetraanionic OCO pincer ligand metal-oxo-alkylidene complex is prepared from a trianionic pincer ligand supported metal-alkylidyne. The metal can be tungsten or other group 5-7 transition metal. The tetraanionic pincer ligand metal-oxo-alkylidene complex, a trianionic OCO pincer ligand metal complex, or a trianionic ONO pincer ligand metal complex can be used to polymerize cycloalkenes. The poly(cycloalkene)s are predominantly cis-alkene macrocyclics.
Claims10
A stereoregular cyclic polynorbornene consisting of repeating units having greater than 95% cis content and greater than 95% syndiotactic content.
Dependencies are inferred from the claim text.