Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
1H NMR spectra of the alkene and aromatic regions of amide, isomerized amide, and AROMP product. (a) Monomer 1c in CDCl3. (b) Formation of the tetrasubstituted isomer 1c′ in the presence of catalyst 2 in CDCl3. (c) Purified alternating copolymer poly(1c′-alt-3)420 in CD2Cl2. (CD2Cl2 was used to avoid overlap with aromatic proton signals and to allow their integration.) The two alkene signals correspond to H1 and H4 of poly(1c′-alt-3)420 (see Scheme 1 for structure).
