The chemistry of both alumoxanes and organoaluminum carboxylates has been under investigation in the last few decades and in some way, studies on these two quite different entities have often overlapped. Alumoxanes are attracting attention owing to their importance for the polymerization of a wide range of organic monomers, as highly active catalysts or cocatalysts, and the initial studies trace back to the end of 1950s. While organoaluminum carboxylates and particularly carboxylate alumoxanes are very useful precursors in materials science. Despite long lasting studies there is relative paucity of structural data for both classes of compounds. In this report we present the structure investigation of organoaluminum complexes derived from a variety of bifunctional carboxylic acids: glycine, anthranilic, salicylic and phthalic acids [1-4]. Besides the tetra-nuclear clusters of type [(Me2Al)2-μ3-(O2CC6H4-2-X)]2, and the first organoaluminum carboxylate coordination polymer [(Me2Al)2(μ-O2C)2-1,2-C6H4(Me2Al·γpikolina)]n, we will demonstrate the novel macrocyclic carboxylate alumoxane (I) supported by the bipyridine ligand, and the first coordination polymer based on the alumoxane building blocks (II).figure