Reactions of diethylaminodimethylaluminum dimer, [Me2Al(mu-NEt2)](2), with the tripodal ligands 2,2-bis(aminomethyl)-1-propanol, CH3C(CH2NH2)(2)(CH2OH), and 2-aminomethyl-2-(thiophenylmethyl)-1-propanol, CH3C(CH2NH2)(CH2OH)(CH2SPh), have yielded a tetranuclear organoaluminum compound {[AlMe2](3)[CH3C(CH2NH)(2)(CH2O)](2)Al} (1) and a trinuclear compound (AlMe2)(2)AlMe[CH3C(CH2NH)(CH2O)(CH2SPh)] (2), respectively. Both compounds were characterized by H-1 and C-13 NMR data, IR, and mass and elemental analysis. Compound 1 was also characterized by single-crystal X-ray diffraction analysis. Compound 1 crystallized in a tetragonal space group P4(1)2(1)2 (No. 92), with cell parameters a = 10.238(2) Angstrom, c = 24.470(2) Angstrom, V = 2565(1) Angstrom(3), Z = 4, and R = 0.060. It appears that the central aluminum atom is surrounded by two tripodal ligands in an octahedral geometry, whereas the other three aluminum atoms act to bridge the two ligands. Compound 2 has a pentacoordinated aluminum center surrounded by two tripodal ligands and one methyl group. The sulfur atoms on the tripodal ligand were not coordinated to the central aluminum atom.