Reactivity Studies of LAlH2 [L = HC(CMeNAr)2, Ar=2, 6-iPr2C6H3] with 2-[(2-Hydroxybenzylidene)amino]-3-mercaptopropionic Acid and Benzene-1, 2-diamine

The reaction of LAlH2 [L = HC(CMeNAr)2, Ar = 2, 6-iPr2C6H3] (1) with 2-[(2-hydroxybenzylidene)amino]-3-mercaptopropionic acid and benzene-1, 2-diamine resulted in the compounds LAl[(-O)(o-C6H4)][(-O)(COCHCH2SH)](NCH) (2) and LAl(-NH)2(o-C6H4) (3), respectively. Compound 2 is an unusual aluminum Schiff base, which exhibits a C3NAlO six- and a C2NAlO five-membered ring, which share the same AlN coordinate bond. Moreover the aluminum atom is five-coordinate and functions as the center of the three heterocycles. Compound 3 features an organic-inorganic hybrid containing a C2N2Al five-membered ring. Complexes 2 and 3 were characterized by 1H NMR, elemental analysis, and single-crystal X-ray diffraction studies.