D. Baudry-barbier et al., Homogeneous organolanthanide catalysts for the selective polymerization ofstyrene without aluminium cocatalysts, APPL ORGAN, 13(11), 1999, pp. 813-817
Anionic or neutral allylic samarium or neodymium species catalyse the polym
erization of styrene (catalyst/styrene ratio = 1:1000) without addition of
a cocatalyst. Random syndiotactic-rich material is obtained from tetra-ally
l-lanthanides, whereas neutral trisallyl-lanthanides or anionic ansa-bis(cy
clopentadienyl)bisallyl-lanthanides afford isotactic-rich polystyrene. Copy
right (C) 1999 John Wiley & Sons, Ltd.