Coordination polymers are multidimensional periodic structures of metal ions interconnected through organic ligands, which, through their specific structure and properties, have been of great interest to researchers in the fields of chemistry and technology sciences, as well as in other areas [1]. The two-dimensional polymer of Cu(II) of molecular formula {[NH2(CH3)2]2[Cu3(HIDA)4]·H2O}n was synthesized following the reaction of iminodiacetic acid (H3IDA) and copper(II) acetate monohydrate in the presence of dianilineglyoxime (DAnH2) in a molar ratio of 2: 1: 2 and methanol-DMF-water environment in a volumetric ratio 2: 1: 1. The coordination polymer compound has been studied by single crystal X-ray diffraction and combined thermogravimetric analysis (TG, DTG and DTA). The cation [NH2(CH3)2] + were probably obtained from (H3IDA), also dianilineglyoxime didn’t coordinate to the metal, its role being just to create a suitable environment for the reaction to occur. The termogram was recorded in the range of 20- 1000oC in air atmosphere, at a heating rate of 10°C/min. (Figure). From the thermogram can be noted that only several stages of decomposition have taken place, since the given polymer has a relatively simple chemical composition, consisting only of amino acid anions and dimethylammonium cations. From the first decomposition stage at 85oC, the loss of the water molecule from the external sphere is observed, the mass loss constituting approximately 4.87 %. In the range of 85-215oC, the IDA protonated molecules with gas release (CO2, N2O, etc.) and a mass loss of 30.38 %, are completely decomposed. At a higher temperature range of 215-590oC, breakage of the metal-ligand linkages occurs with the total decomposition of the 4 iminodiacetic acid molecules, the mass loss constituting 48.46 % of the total mass of the polymer. Following the whole thermal decomposition process, CuO residue with a mass fraction of 16.29 % is formed. Figure. TG/DTG/DTA patterns of Cu(II) 2D polymer.