Synthesis and structure of monocyclopentadienylyttrium(III) dichloride tris(tetrahydrofuran)

Abstract

The complex CpYCl 2(THF) 3 (Cp  C 5H 5) was obtained by reacting YCl 3 with sodium and cyclopentadiene (1:1:5 molar ratio) in THF at room temperature, which has been studied by X-ray crystallography. The complex is monomeric with the ytrium atom coordinated by one Cp ring centroid, three oxygen atoms from three THF molcecules and two chloride atoms to give rise to a distorted octahedral coordination. The YC(Cp) bond lengths range from 2.59(3) to 2.73(4) Å and average 2.65(3) Å. The THF molecules coordinate to the yttrium atom with YO distances of 2.34(2), 2.35(2), 2.35(2) and 2.50(2) Å, respectively. The YCl bond lengths are 2.630(8) and 2.625(7) Å, respectively. Some significant parameters of the title complex have been compared with the corresponding values of the known isostructural organolanthanide complexes of Nd, Gd, Ho, Er and Yb.