Synthesis, crystal structure, and characterization of two heterometallic transition metal citrate complexes [M = Co(II) and Cd(II)]

Abstract

In this study, two heterometallic transition metal complexes with the formulas [CoK4(µ10 -C6 H5 O7)2 ] n and[CdK(µ8 -C6 H5 O7)(µ-H2 O)(H2 O)] n were synthesized as crystalline compounds. The structures of these crystalline metal complexes were characterized by their spectral analyses (FT-IR, FT-Raman, thermal analysis, magnetic properties, and single-crystal X-ray diffraction techniques). According to the spectral data of the new metal complexes obtained, both metal complexes are in the monoclinic crystal system and in the P2 1 /c and P2 1 space groups, respectively. The asymmetric unit of the metal complex [CoK4(µ10 -C6 H5 O7)2 ] n contains one Co(II) ion, two potassium cations, and one (C6 H5 O7) citrate ligand, whereas that of the asymmetric unit of the metal complex [CdK(µ8 -C6 H5 O7)(µH2 O)(H2 O)] n contains one Cd(II) ion, one potassium cation, one (C6 H5 O7) citrate ligand, and two coordinated water molecules.