Synthesis and characterization of yttrium complexes bearing a bulky arylamido ancillary ligand

Reaction of anhydrous YCl3 with 1 equiv. of arylamido lithium 2,6-iPr2C6H3NSiiPr3Li in THF gave an anionic mono-arylamido-ligated yttrium dichloride complex {[2,6-iPr2C6H3NSiiPr3]YCl2(THF)}2[LiCl(THF)2] (1). Alkylation of 1 with 4 equiv. of LiCH2SiMe3 afforded an anionic arylamido-ligated yttrium tris(alkyl) complex [2,6-iPr2C6H3NSiiPr3]Y(CH2SiMe3)3Li(THF)2 (2). Both complexes were characterized by NMR, elementary analysis, and X-ray structural determination.