Nine acidic or neutral ethylenediaminetetraacetato [H2Y2-, H3Y- or Y4-] containing adducts and derivatives have been synthesized and studied by infrared. The suggested structures are discrete with octahedral or trigonal bipyramidal environments around the tin centres, the ethylenediaminetetraacetic anion behaving as a bidentate and hydrogen bonds involved, a tridentate, a tetradentate, a bichelating and hydrogen bonds involved ligand, a tri- or tetrachelating ligand. For all the structures when intermolecular hydrogen bonds involving OH or CH groups are considered, a supramolecular architecture may be obtained.
