484031-98-3Relevant academic research and scientific papers
Synthesis, characterization of homoleptic lanthanide amidinate complexes and their catalytic activity for the ring-opening polymerization of ε-caprolactone
Luo, Yunjie,Yao, Yingming,Shen, Qi,Sun, Jie,Weng, Linhong
, p. 144 - 149 (2002)
Addition of [CyNC(R)NCy]Lithium (Cy = cyclohexyl, R = methyl, phenyl) to anhydrous lanthanide trichlorides in 3:1 molar ratio yielded a series of homoleptic amidinate lanthanide complexes with the general formula [CyNC(R)NCy]3Ln.nTHF (R = methyl, Ln = Nd (1), Gd (2), Yb (3), n = 0; R = phenyl, Ln = Nd (4), Y (5), Yb (6), n = 2). The X-ray crystal structural determination of 3 and 6 revealed that the ytterbium ions in both complexes are coordinated by three bidentate amidinate moieties with a trigonal planar geometry. These amidinate lanthanide complexes showed extremely high activity for the ring-opening polymerization of ε-caprolactone at room temperature.
