Monoalkyl rare-earth metal complexes could be highly active catalysts for 1,4-regioselective polymerization of isoprene in the presence of cocatalysts.
One-pot salt metathesis reaction of LnCl3, [2,6-iPr2C6H3N(SiMe3)]Li and LiN(SiHMe2)2 in 1 : 1 : 2 molar ratio gave [2,6-iPr2C6H3N(SiMe3)]Ln[N(SiHMe2)2]2(THF) (Ln = Y, Lu, La), which were highly active for cis-1,4 polymerization of isoprene in the presence of [Ph3C][B(C6F5)4] and AliBu3.
Chiral anilido-oxazoline-supported Sc complexes showed outstanding activity (TOFs of up to 2910 h−1) and heteroselectivity in the ring-opening polymerization of rac-LA.
All solid solutions (EuxY1−x-PTC, x = 0.013–0.82) are isomorphic to Eu-PTC, but different from Y-PTC, and show phase selectivity as well as excitation wavelength dependent emission.