Preparation and 13C NMR spectra of model compounds for poly(4-bromostyrene)

The preparations of 2,4‐bis(4‐bromophenyl)pentane (1b) and 2,4,6‐tris(4‐bromophenyl)heptane (2b) are described. The study of the different isomers of 1b and 2b by 13C NMR allows a comparison of the various configurational sequences of these compounds in terms of their chemical shifts. Methyl, methylene, and aromatic C1 carbons of 1b and 2b could be deduced from the values obtained from corresponding polystyrene model compounds by a mere translation. From the aromatic C1 chemical shifts it was possible to propose an assignment of the corresponding triads of poly(4‐bromostyrene).