Abstraet.Powder ESR spectra of [Cu2([nd)4](H20)2 at room temperature show the presence of copper acetate like dimers charactedzed by a slrong antiferromagnetie exchange interaction (J~--338 cm J). Two different monomeric speeies were evidenced in 40%Py+60%DMF solution absorbed on NaY zeolite: the Cu(Ind)2(DMF)2 with ah elongated tetragonal-octahedral symmetry and the Cu(Ind)2(Py) 2 with a CuN202 chromophore in a trans square-planar arrangement. Only one monomeric species Cu(Ind)2(Py)2 was identified in 20%Py+80%DMF and 20%Py+80%Chloroform sotutions. The Cu(Py)42 § species of CuN 4 chromophore occurs in pyridine Cu(II)-indomethacin solution suggesting a decomposition of the solvit compound.