摘要
Catalysts consistiug of different iron compounds, triisobutylaluminium and warious ligands containing nitrogen used for butadiene polymerization were investigated by UV-visible, infrared spectroscopy. Spectra obtained illustrate an exchange taking place between the acetylacetonyl group in Fe（acac）3 and the isobutyl group in Al（i-Bu）3. During the exchange iron was reduced to lower valence state and coordinated with dipyridine or phenanthroline forming an active intermediate complex. A correlation between the absorption strength of the active intermediate complex in the visible range and the activity of catalyst was established.
Catalysts consistiug of different iron compounds, triisobutylaluminium and warious ligands containing nitrogen used for butadiene polymerization were investigated by UV-visible, infrared spectroscopy. Spectra obtained illustrate an exchange taking place between the acetylacetonyl group in Fe(acac)_3 and the isobutyl group in Al(i-Bu)_3. During the exchange iron was reduced to lower valence state and coordinated with dipyridine or phenanthroline forming an active intermediate complex. A correlation between the absorption strength of the active intermediate complex in the visible range and the activity of catalyst was established.
