Isolation and Reactivity of Stannylenoids Stabilized by Amido/Imino Ligands.

The reaction of the lithium aryl(silyl)amide Dipp( i Pr 3 Si)NLi (Dipp=2,6- i Pr 2 C 6 H 3 ) with one equivalent of SnCl 2 in THF gave a novel stannylenoid Dipp( i Pr 3 Si)NSnCl⋅LiCl(THF) 2 . Heating the solution of amidostannylenoid in toluene to 80 °C resulted in dimeric amido(chloro)stannylene [Dipp( i Pr 3 Si)NSnCl] 2 , which can be converted to bis(amido)stannylene Sn[N(Dipp)( i Pr 3 Si)] 2 and amido(imino)stannylene Sn[N(Dipp)( i Pr 3 Si)][IPrN] (IPrN=bis(2,6-diisopropylphenyl)imidazolin-2-imino). Treatment of bis(imino)stannylenoid [IPrN] 2 Sn(Cl)Li with N 2 O resulted in the dimeric complex [IPrNSn(Cl)OLi] 2 . All compounds were characterized by NMR, elementary analysis, and X-ray structural determination.