New Polymers Made with Well-Characterized Organometallic Catalysts.

摘要

In the first publication we reported that Mo(CH-t-Bu)(NAr)(O-t-Bu)2 was a good catalyst for the ring opening metathesis polymerization of endo,endo-5,6-dicarbomethoxynorbornene to give homopolymers with polydispersities in the range 1.11-1.22, as well as block copolymers containing endo,endo-5,6-dicarbomethoxynorbornene and norbornene with similar low polydispersities. In the second publication we reported additional details of the metathesis of functionalized monomers by molybdenum, and also that 7,8-bis(trifluoromethyl)tricyclo(4.2.2.0)deca-3,7,9-triene could be ring opened and the polymer cleaved with pivaldehyde to give (after pyrolysis) soluble polyenes, (t-Bu)(CH=CH)2x+1(t-Bu). Triblocks containing a 40-ene (average) central chain, capped by two polynorbornene chains also were prepared. (jes)