Two coordination polymers containing the dicyanamide ligand: Synthesis, crystal structures, and HFEPR studies

• The use of different metal ions leads to structures with different dimensionalities.
• The magnetic properties of the compound 1 are due to an isolated NiII ion.
• EPR measurements determined the Zero Field Splitting parameters of the NiII ion in 1.

Two new compounds [Ni(dca)2(dmdpy)] (1) and [Zn(dca)2(dmdpy)] (2), (dca = dicyanamide and dmdpy = 5,5′-dimethyl-2,2′-dipyridine) were synthesized and characterized by single crystal X-ray diffraction, FTIR and thermal analysis. In both compounds, the dmdpy ligand adopts a bidentate chelating coordination mode while dca anions act in a μ1,5 bridging fashion. In 1, the NiII centers lie on a distorted octahedral geometry, whereas in 2 the ZnII geometry is distorted square pyramidal. In compounds 1 and 2, dca ligands connect the metal sites giving rise to 2D and 1D coordination polymers, respectively. The magnetic properties of 1 were studied by magnetic susceptibility and high field/frequency electron paramagnetic resonance (HFEPR) measurements.

Two new compounds [Ni(dca)2(dmdpy)] (1) and [Zn(dca)2(dmdpy)] (2), (dca = dicyanamide and dmdpy = 5,5′-dimethyl-2,2′-dipyridine) were synthesized and characterized by single crystal X-ray diffraction, FTIR and thermal analysis. In both compounds, the dmdpy ligand adopts a bidentate chelating coordination mode while dca anions act in a μ1,5 bridging fashion. The magnetic properties of 1 were studied by magnetic susceptibility and high field/frequency electron paramagnetic resonance (HFEPR) measurements.Figure optionsDownload as PowerPoint slide