Five-coordinate aluminum amides

In the present manuscript-we will detail the first use of the Salen((t)Bu)H-2 ligands with the group 13 elements. This includes the compounds of formula Salen((t)Bu)AlCl (where Salen = Salen(N,N'-ethylenebis(3,5-di-tert-butylsalicylideneimine)) (1), Salpen (N,N'-propylenebis(3,5-di-tert-butylsalicylideneimine)) (2), Salophen (N,N'-benzenylidenebis(3,5-di-tert-butylsalicylideneamine)) (3), and Salomphen (N,N'-(3,4-dimethylbenzenylidene)bis(3,5 -di-tert-butylsalicylideneimine)) (4)) and the novel five-coordinate monomeric amides of formula LAlNRR' (where L = Acen (N,N'-ethylenebis(((t)Bu)salicylidene(methyl)imine) R, R' = H, Ph (5); R = R'= SiMe(3) (6)) and L = Salen (R, R' = H, (t)Bu (7), H, Ph (8), and H, Dipp (2,6-diisopropylphenyl) (9); R = R' = Me (10), Et (11), and SiMe(3) (12))). Additionally the unique monomeric hydroxy complex Salen((t)Bu)AlOH (13) and its condensation product, (Salen((t)-Bu)Al)(2)O (14), will be described. All of the compounds were characterized by spectroscopic (H-1, C-13, and Al-27 NMR, IR) and physical (mp, analyses) techniques. X-ray crystallographic data are presented for 14.