Abstract
In this work, titanium complexes of the bidentate bulky guanidine ligand [{(Dip)N}(2)CNR2]H (where Dip = C(6)H(3)iPr(2)-2,6 and R = CH(CH3)(2)) (LH) were prepared. Reaction of LH with one equivalent of [(CH3)(2)NTiCl3] underwent amine elimination to afford the monomeric complex [LTiCl3] (1) in high yield. Attempts to reduce 1 with potassium graphite (KC8) in tetrahydrofuran (THF) were unsuccessful. However, reacting 1 with 3.3 equivalents of KC8 in hexane led to the first example of structurally characterized mono-guanidinate ligand stabilized dimeric Ti-III complex [LTiCl(mu-Cl)](2) (2). The synthesized complexes were characterized by NMR spectroscopy and the structures were further confirmed by X-ray crystallography.