Add time:08/13/2019         Source:sciencedirect.com

The synthesis and characterization of bis- and monocyclopentadienyl lanthanide [(S)-Cp′]2Lnl (Ln  Sm, 3; Ln  La, 4) and (S)-Cp′Lnl2(THF)R, (Ln  Sm, n = 3, 5; Ln  La, n = 2, 6) coordinated by an asymmetric cyclopentadienyl ligand (Cp′ = C5H2CH2CH(CH3)OCH2Ph) have been carried out. Variable-temperature NMR study of compounds 3 and 4 reveals a fluxional process in solution. The X-ray crystal structure analysis of 3 shows a bent metallocene structure with intramolecular coordination to the oxygen atoms of the side chains of both cyclopentadienyl ligands. For monocyclopentadienyl complexes, intramolecular coordination is observed only for the lanthanum complex 6. All compounds exhibit activity for the catalysis of Diels-Alder reactions.

We also recommend Trading Suppliers and Manufacturers of TRIS(CYCLOPENTADIENYL)LANTHANUM (cas 1272-23-7). Pls Click Website Link as below: cas 1272-23-7 suppliers