To report a new polymerization reaction phenomenon, this article examines the polymerization of butyl vinyl ether and N-vinylcarbazole in the presence of 2-benzoxypentafluoropropene [CF2=C(CF3)OCOC6H5 or BPFP]. The homopolymer of butyl vinyl ether was produced in the presence of a catalytic amount of BPFP in high yields. N-Vinylearbazole, which is a monomer well-known for producing its homopolymer under cationic polymerization conditions, also yielded its homopolymer in the presence of BPFR It was concluded that some cationic species would be yielded by the addition of BPFR (c) 2007 Wiley Periodicals, Inc.