The ligand C5H4(CH2CH2CArF2OH) (3) (ArF = 3,5-C6H3(CF3)2) was prepared in two steps, from the iodo ester ICH2CH2CO2Me by way of the cyclopentadienyl ester C5H5CH2CH2CO2Me (2), in 55% overall yield. Thermal reaction of 3 with Y[N(SiMe3)2]2(THF)2(µ-Cl)}2 afforded the neutral chloride complex η5:η1-C5H4[CH2CH2C(O)(3,5-C6H3(CF3)2)2]}YClTHF}n (5a: n = 2, 5b: n = 1). Metathesis reactions of 5 with 1 equiv of NaN(SiMe3)2, LiO-2,6-t-Bu2C6H3, and LiCH(SiMe3)2 afforded η5:η1-C5H4[CH2CH2C(O)(3,5-C6H3(CF3)2)2]}YN(SiMe3)2}THF}n (6), η5:η1-C5H4[CH2CH2C(O)(3,5-C6H3(CF3)2)2]}YO-2,6-t-Bu2C6H3}THF}n (7), and η5:η1-C5H4[CH2CH2C(O)(3,5-C6H3(CF3)2)2]}YCH(SiMe3)2}THF}n (8), respectively, (a: n = 2, b: n = 1). Exposure of the bis(THF) solvates to reduced pressure resulted in desolvation to the mono(THF) adducts for 58. The solid state structure of 6b was established by X-ray crystallography. In addition, formation of a spirocyclic ether (C4H6CH2CH2C(O)(3,5-C6H3(CF3)2)2 4), obtained by the intramolecular cyclization of ligand 3, was confirmed by X-ray crystallography. Key words: yttrium, organometallic, cyclopentadienyl, X-ray, alkoxide, chelate, alkyl, hybrid ligand, NMR, cyclization.