-By using standard bromination conditions, the insoluble 1,2,1,2-polypropadiene (formed by Ni(acac)z or Co(acac)2 or 3, C3H,,, (iBu)3A1 catalysts) is transformed into a soluble bromopolypropadiene. Using this technique, determination of molecular weight becomes possible. It was found that the molecular weight increases with polymerization time until a steady value is reached. As the polymer yie...
