A heterometallic copper-neodymium complex CuNd2(CCl3COO)8 ⋅ 6MeCN (1) was synthesized from an aqueous-organic salt system and structurally characterized by single crystal X-Ray diffraction analysis. Thermal stability of 1 was studied. The crystal of 1 is tetragonal, with the space group I4, a=11.5904(3), c=23.9195(8) Å, V=3213.3(2) Å3, Z=8. Two crystallographically unsymmetrical Nd atoms and one Cu atom are bridged by trichloroacetic ligands into one-dimensional molecular chains. According to our experimental data on magnetic properties of 1, the compound could be classified as paramagnet at observed temperature range 2–300 K.

In addition, the structure of the obtained Nd (III) trichloroacetate Nd(CCl3COO)3(H2O)2 ⋅ 2H2O (2) was determined. The structural data of 1 and 2 were compared to the one for known rare-earth trichloroacetates.