Abstract: This paper reports the syntheses and characterizations of benzylcyclopentadienyl lanthanoid dichloride tetrahydrofuranate complexes. The complexes C₆H₅CH₂C₅H₄LnCl₂ · _nTHF(C₆H₅CH₂C₅H₄ = Benzylcyclopentadienyl; Ln = Nd, Sm, Gd; n = 1, 2) were characterized by elementary analysis, thermal analysis, IR, MS, and ¹H NMR. The benzylcyclopentadiene is also characterized by the same method. The crystal structure of the intermediate C₅H₆CH₂C₅H₄Na · THF was determined by X-ray diffraction analysis.

Key words: Benzylcyclopentadiene, Benzylcyclopentadienyl lanthanoid dichloride, Lanthanlde complexes