Ethanol → HCID 69002393, compound

Participants

Reaction Steps

A norbornene carboxylic acid methyl ester monomer (16.74 g), a norbornene monomer (4.44 g), and 37 Ml of toluene were added to a 250 Ml Schlenk flask. A solution of Pd(OAc)2 (4.79 mg) and [(Cy)3PH][B(C6F5)4] (40.4 mg) in dichloromethane (2 Ml) was added to the flask, and the reaction mixture was incubated at 90° C. for 10 hours while stirring. Then, the reaction solution was added to excess ethanol to obtain a white copolymer precipitate. The precipitate was filtered through a glass funnel and dried in a vacuum oven at 65° C. for 24 hours to give 14.86 g of a norbornene/5-norbornene-2-carboxylic acid methyl ester copolymer (yield: 70.2 wt % based on the total weight of the monomers). The Mw and Mw/Mn of the polymer were 184,000 and 2.12, respectively.

Provenance & Evidence