In the oligomerization of butadiene with the catalyst composed of iron (III) acetylacetonate and triethylaluminum, the degree of digomerization and the structures of the oligomers were strongly affected by the addition of an electron donor as a catalyst component. When triphenylphosphine was added, linear dimers composed of 3-methylhepta-1, 4, 6-triene and n-octa-1, 3, 6-triene were formed, while the addition of 2, 2′-dipyridyl produced cyclic ...
