Synthesis, structure and thermogravimetric analysis of Ni-Cd and Cu-Cd heterometallic complexes based on flexible carboxylate ligands

摘要

Two 3d-4d heterometallic coordination polymers, namely NiCd(mal)2(H2O)4 (1) and [CuCd (bicH2)(NO3)Cl2(H2O)]H2O (2) [H2mal = malonic acid, bicH3 = N,N-bis(2-hydroxyethyl) glycine], have been synthesized under mild conditions and characterized by single-crystal X-ray diffraction, elemental analysis and IR spectrophotometry. Complex 1 is a Ni-Cd heterometallic polymer with 2D extended structure bridged by the mal~(2-) groups. Complex 2 displays an intriguing 3D Cu-Cd architecture and is the first 3d-4d heterometallic bicinate complex. The TG analyses of both complexes are reported.